docs: vendor OpenCPN audit source baseline

docs/外部参考.md

@@ -1,6 +1,8 @@
 # 外部参考
 
-本项目独立实现 CM93 importer，不复制 OpenCPN GPL 源码。
+本项目独立实现 CM93 importer；为保证 S-52 / CM93 对照审计可在不同机器复现，仓库内另行保存一份只读 OpenCPN GPL 上游源码快照，作为外部参考资料，不与 CM95 自有实现混合。
+
+固定参考快照：`docs/外部参考/OpenCPN源码基线_f7211b4e/`，上游 commit 为 `f7211b4e1874c453e37a7f190aa191c55a25c32e`，目录内保留原始版权声明、GPL 许可证和 SHA-256 校验清单。
 
 用于核对行为和 MySQL 兼容性的公开参考：
 

docs/外部参考/OpenCPN源码基线_f7211b4e/上游提交.txt

@@ -0,0 +1 @@
+f7211b4e1874c453e37a7f190aa191c55a25c32e

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/Cs52_shaders.cpp

@@ -0,0 +1,305 @@
+/***************************************************************************
+ *
+ * Project:  OpenCPN
+ *
+ ***************************************************************************
+ *   Copyright (C) 2017 by David S. Register                               *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ **************************************************************************/
+
+#include "Cs52_shaders.h"
+
+#if defined(USE_ANDROID_GLES2) || defined(ocpnUSE_GLSL)
+
+#ifdef USE_ANDROID_GLES2
+#include <GLES2/gl2.h>
+#include "qdebug.h"
+#endif
+
+#ifdef USE_ANDROID_GLES2
+const GLchar* Cpreamble =
+"\n";
+#else
+const GLchar* Cpreamble =
+"#version 120\n"
+"#define precision\n"
+"#define lowp\n"
+"#define mediump\n"
+"#define highp\n";
+#endif
+
+
+// Simple colored triangle shader
+
+static const GLchar* xcolor_tri_vertex_shader_source =
+    "attribute vec2 position;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+    "uniform vec4 color;\n"
+    "varying vec4 fragColor;\n"
+    "void main() {\n"
+    "   fragColor = color;\n"
+    "   gl_Position = MVMatrix * TransformMatrix * vec4(position, 0.0, 1.0);\n"
+    "}\n";
+
+static const GLchar* xcolor_tri_fragment_shader_source =
+    "precision lowp float;\n"
+    "varying vec4 fragColor;\n"
+    "void main() {\n"
+    "   gl_FragColor = fragColor;\n"
+    "}\n";
+
+// Simple 2D texture shader
+static const GLchar* xtexture_2D_vertex_shader_source =
+    "attribute vec2 position;\n"
+    "attribute vec2 aUV;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+    "varying vec2 varCoord;\n"
+    "void main() {\n"
+    "   gl_Position = MVMatrix * TransformMatrix * vec4(position, 0.0, 1.0);\n"
+    "   varCoord = aUV;\n"
+    "}\n";
+
+static const GLchar* xtexture_2D_fragment_shader_source =
+    "precision lowp float;\n"
+    "uniform sampler2D uTex;\n"
+    "varying vec2 varCoord;\n"
+    "void main() {\n"
+    "   gl_FragColor = texture2D(uTex, varCoord);\n"
+    "}\n";
+
+// 2D texture shader with color modulation, used for colored text
+static const GLchar * xtexture_2D_ColorMod_vertex_shader_source =
+    "precision highp float;\n"
+    "attribute vec2 position;\n"
+    "attribute vec2 aUV;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+    "varying vec2 varCoord;\n"
+    "void main() {\n"
+    "   gl_Position = MVMatrix * TransformMatrix * vec4(position, 0.0, 1.0);\n"
+    "   varCoord = aUV;\n"
+    "}\n";
+
+static const GLchar * xtexture_2D_ColorMod_fragment_shader_source =
+    "precision highp float;\n"
+    "uniform sampler2D uTex;\n"
+    "uniform vec4 color;\n"
+    "varying vec2 varCoord;\n"
+    "void main() {\n"
+    "   vec4 col=texture2D(uTex, varCoord);\n"
+    "   gl_FragColor = color;\n"
+    "   gl_FragColor.a = col.a;\n"
+    "}\n";
+
+//  Circle shader
+
+static const GLchar* xcircle_filled_vertex_shader_source =
+    "precision highp float;\n"
+    "attribute vec2 aPos;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+    "void main() {\n"
+    "   gl_Position = MVMatrix * TransformMatrix * vec4(aPos, 0.0, 1.0);\n"
+    "}\n";
+
+static const GLchar* xcircle_filled_fragment_shader_source =
+    "precision highp float;\n"
+    "uniform float border_width;\n"
+    "uniform float circle_radius;\n"
+    "uniform vec4 circle_color;\n"
+    "uniform vec4 border_color;\n"
+    "uniform vec2 circle_center;\n"
+    "void main(){\n"
+    "float d = distance(gl_FragCoord.xy, circle_center);\n"
+    "if (d < (circle_radius - border_width)) { gl_FragColor = circle_color; }\n"
+    "else if (d < circle_radius) { gl_FragColor = border_color; }\n"
+    "else { gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0); }\n"
+    "}\n";
+
+// Alpha 2D texture shader
+static const GLchar* xtexture_2DA_vertex_shader_source =
+    "attribute vec2 position;\n"
+    "attribute vec2 aUV;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+    "varying vec2 varCoord;\n"
+    "void main() {\n"
+    "   gl_Position = MVMatrix * TransformMatrix * vec4(position, 0.0, 1.0);\n"
+    "   varCoord = aUV;\n"
+    "}\n";
+
+static const GLchar* xtexture_2DA_fragment_shader_source =
+    "precision lowp float;\n"
+    "uniform sampler2D uTex;\n"
+    "varying vec2 varCoord;\n"
+    "uniform vec4 color;\n"
+    "void main() {\n"
+    "   gl_FragColor = texture2D(uTex, varCoord) + color;\n"
+    "}\n";
+
+
+//https://vitaliburkov.wordpress.com/2016/09/17/simple-and-fast-high-quality-antialiased-lines-with-opengl/
+static const GLchar* xAALine_vertex_shader_source =
+    "uniform vec2 uViewPort; //Width and Height of the viewport\n"
+    "varying vec2 vLineCenter;\n"
+    "attribute vec2 position;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+  "void main()\n"
+  "{\n"
+  "   vec4 pp = MVMatrix * vec4(position, 0.0, 1.0);\n"
+  "   gl_Position = pp;\n"
+  "   vec2 vp = uViewPort;\n"
+  "   vLineCenter = 0.5*(pp.xy + vec2(1, 1))*vp;\n"
+  "}\n";
+
+
+static const GLchar* xAALine_fragment_shader_source =
+    "precision mediump float;\n"
+    "uniform float uLineWidth;\n"
+    "uniform vec4 color;\n"
+    "uniform float uBlendFactor; //1.5..2.5\n"
+    "varying vec2 vLineCenter;\n"
+    "void main()\n"
+    "{\n"
+    "    vec4 col = color;\n"
+    "    float d = length(vLineCenter-gl_FragCoord.xy);\n"
+    "    float w = uLineWidth;\n"
+    "    if (d>w)\n"
+    "      col.w = 0.0;\n"
+    "    else{\n"
+    "      if(float((w/2-d)/(w/2)) < .5){\n"
+    "        //col.w *= pow(float((w-d)/w), uBlendFactor);\n"
+    "        col.w *= pow(float((w/2-d)/(w/2)), uBlendFactor);\n"
+    "      }\n"
+    "    }\n"
+    "    gl_FragColor = col;\n"
+    "}\n";
+
+
+CGLShaderProgram *pCAALine_shader_program[2];
+CGLShaderProgram *pCcolor_tri_shader_program[2];
+CGLShaderProgram *pCtexture_2D_shader_program[2];
+CGLShaderProgram *pCcircle_filled_shader_program[2];
+CGLShaderProgram *pCtexture_2DA_shader_program[2];
+CGLShaderProgram *pCtexture_2D_Color_shader_program[2];
+
+bool bCShadersLoaded[2];
+
+bool loadCShaders(int index) {
+  // Are the shaders ready?
+  if (bCShadersLoaded[index]) {
+    reConfigureCShaders(index);
+    return true;
+  }
+
+  bool ret_val = true;
+
+  // Simple colored triangle shader
+  if (!pCcolor_tri_shader_program[index]) {
+    CGLShaderProgram *shaderProgram = new CGLShaderProgram;
+    shaderProgram->addShaderFromSource(xcolor_tri_vertex_shader_source, GL_VERTEX_SHADER);
+    shaderProgram->addShaderFromSource(xcolor_tri_fragment_shader_source, GL_FRAGMENT_SHADER);
+    shaderProgram->linkProgram();
+
+    if (shaderProgram->isOK())
+      pCcolor_tri_shader_program[index] = shaderProgram;
+  }
+
+  if (!pCtexture_2D_shader_program[index]) {
+    CGLShaderProgram *shaderProgram = new CGLShaderProgram;
+    shaderProgram->addShaderFromSource(xtexture_2D_vertex_shader_source, GL_VERTEX_SHADER);
+    shaderProgram->addShaderFromSource(xtexture_2D_fragment_shader_source, GL_FRAGMENT_SHADER);
+    shaderProgram->linkProgram();
+
+    if (shaderProgram->isOK())
+      pCtexture_2D_shader_program[index] = shaderProgram;
+  }
+
+   if (!pCtexture_2D_Color_shader_program[index]) {
+    CGLShaderProgram *shaderProgram = new CGLShaderProgram;
+    shaderProgram->addShaderFromSource(xtexture_2D_ColorMod_vertex_shader_source, GL_VERTEX_SHADER);
+    shaderProgram->addShaderFromSource(xtexture_2D_ColorMod_fragment_shader_source, GL_FRAGMENT_SHADER);
+    shaderProgram->linkProgram();
+
+    if (shaderProgram->isOK())
+      pCtexture_2D_Color_shader_program[index] = shaderProgram;
+  }
+
+#if 0
+
+  if (!pcircle_filled_shader_program[index]) {
+    GLShaderProgram *shaderProgram = new GLShaderProgram;
+    shaderProgram->addShaderFromSource(circle_filled_vertex_shader_source, GL_VERTEX_SHADER);
+    shaderProgram->addShaderFromSource(circle_filled_fragment_shader_source, GL_FRAGMENT_SHADER);
+    shaderProgram->linkProgram();
+
+    if (shaderProgram->isOK())
+      pcircle_filled_shader_program[index] = shaderProgram;
+  }
+
+  if (!ptexture_2DA_shader_program[index]) {
+    GLShaderProgram *shaderProgram = new GLShaderProgram;
+    shaderProgram->addShaderFromSource(texture_2DA_vertex_shader_source, GL_VERTEX_SHADER);
+    shaderProgram->addShaderFromSource(texture_2DA_fragment_shader_source, GL_FRAGMENT_SHADER);
+    shaderProgram->linkProgram();
+
+    if (shaderProgram->isOK())
+      ptexture_2DA_shader_program[index] = shaderProgram;
+  }
+
+  if (!pAALine_shader_program[index]) {
+    GLShaderProgram *shaderProgram = new GLShaderProgram;
+    shaderProgram->addShaderFromSource(AALine_fragment_shader_source, GL_FRAGMENT_SHADER);
+    shaderProgram->addShaderFromSource(AALine_vertex_shader_source, GL_VERTEX_SHADER);
+    shaderProgram->linkProgram();
+
+    if (shaderProgram->isOK())
+      pAALine_shader_program[index] = shaderProgram;
+  }
+
+#endif
+
+  bCShadersLoaded[index] = true;
+  reConfigureCShaders(index);
+
+  return ret_val;
+}
+
+void reConfigureCShaders(int index) {
+}
+
+void unloadCShaders() {
+  bCShadersLoaded[0] = bCShadersLoaded[1] = false;
+}
+
+CGLShaderProgram *CGetStaticTriShader() {
+  CGLShaderProgram *shaderProgram = new CGLShaderProgram;
+  shaderProgram->addShaderFromSource(xcolor_tri_vertex_shader_source, GL_VERTEX_SHADER);
+  shaderProgram->addShaderFromSource(xcolor_tri_fragment_shader_source, GL_FRAGMENT_SHADER);
+  shaderProgram->linkProgram();
+
+  if (shaderProgram->isOK())
+    return shaderProgram;
+  else
+    return NULL;
+}
+
+
+#endif

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/Cs52_shaders.h

@@ -0,0 +1,186 @@
+/***************************************************************************
+ *
+ * Project:  OpenCPN
+ *
+ ***************************************************************************
+ *   Copyright (C) 2017 by David S. Register                               *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ **************************************************************************/
+
+#ifndef __XSHADERS_H__
+#define __XSHADERS_H__
+
+#include <wx/wxprec.h>
+#ifndef WX_PRECOMP
+#include <wx/wx.h>
+#endif  // precompiled headers
+
+#include "s52plibGL.h"
+
+#ifdef __OCPN__ANDROID__
+#include "qdebug.h"
+#endif
+
+#include <memory>
+#include <vector>
+#include <fstream>
+#include <unordered_map>
+
+class CGLShaderProgram;
+
+extern CGLShaderProgram *pAALine_shader_program[2];
+extern CGLShaderProgram *pCcolor_tri_shader_program[2];
+extern CGLShaderProgram *pCtexture_2D_shader_program[2];
+extern CGLShaderProgram *pcircle_filled_shader_program[2];
+extern CGLShaderProgram *ptexture_2DA_shader_program[2];
+extern CGLShaderProgram *pCtexture_2D_Color_shader_program[2];
+
+extern const GLchar* Cpreamble;
+
+class CGLShaderProgram
+{
+public:
+    CGLShaderProgram() : programId_(0), linked_(false) {
+      programId_ = glCreateProgram();
+    }
+    ~CGLShaderProgram() { }
+
+    bool addShaderFromSource(std::string const &shaderSource, GLenum shaderType) {
+      char const *shaderCStr = shaderSource.c_str();
+      GLuint shaderId = glCreateShader(shaderType);
+
+      GLchar const* files[] = { Cpreamble, shaderCStr };
+      GLint lengths[]       = { (GLint)strlen(Cpreamble),  (GLint)strlen(shaderCStr)  };
+
+      glShaderSource(shaderId, 2, files, lengths);
+
+      glCompileShader(shaderId);
+      glGetShaderiv(shaderId, GL_COMPILE_STATUS, &success);
+      if (!success) {
+        GLint logLength = 0;
+        glGetShaderiv(shaderId, GL_INFO_LOG_LENGTH, &logLength);
+        if (logLength > 0) {
+          auto log = std::unique_ptr<char[]>(new char[logLength]);
+          glGetShaderInfoLog(shaderId, logLength, &logLength, log.get());
+          printf("ERROR::SHADER::COMPILATION_FAILED\n%s\n", log.get());
+#ifdef USE_ANDROID_GLES2
+          qDebug() << "SHADER COMPILE ERROR  " << log.get();
+#endif
+        }
+         return false;
+      }
+
+      glAttachShader(programId_, shaderId);
+      return true;
+    }
+
+    bool linkProgram() {
+      glLinkProgram(programId_);
+      glGetProgramiv( programId_, GL_LINK_STATUS, &linkSuccess); //requesting the status
+      if (linkSuccess == GL_FALSE) {
+        GLint logLength = 0;
+        glGetShaderiv(programId_, GL_INFO_LOG_LENGTH, &logLength);
+        if (logLength > 0) {
+          auto log = std::unique_ptr<char[]>(new char[logLength]);
+          glGetShaderInfoLog(programId_, logLength, &logLength, log.get());
+          printf("ERROR::SHADER::LINK_FAILED\n%s\n", log.get());
+        }
+        return false;
+      }
+      linked_ = true;
+      return true;
+    }
+
+
+    void Bind() { glUseProgram(programId_); }
+    void UnBind() {
+      glDisableVertexAttribArray(0);
+      glUseProgram(0);
+    }
+
+    void SetUniform1f( const std::string &name, float value) {
+        GLint loc = getUniformLocation(name);
+        glUniform1f( loc, value);
+    }
+    void SetUniform2fv( const std::string &name, float *value) {
+        GLint loc = getUniformLocation(name);
+        glUniform2fv( loc, 1, value);
+    }
+    void SetUniform4fv( const std::string &name, float *value) {
+        GLint loc = getUniformLocation(name);
+        glUniform4fv( loc, 1, value);
+    }
+    void SetUniform1i( const std::string &name, GLint value) {
+        GLint loc = getUniformLocation(name);
+        glUniform1i( loc, value);
+    }
+    void SetUniformMatrix4fv( const std::string &name, float *value) {
+      GLint matloc = getUniformLocation(name);
+      glUniformMatrix4fv(matloc, 1, GL_FALSE, value);
+    }
+
+    void SetAttributePointerf( const std::string &name, float *value ){
+      GLint aloc = getAttributeLocation( name);
+      glVertexAttribPointer(aloc, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float), value);
+      glEnableVertexAttribArray(aloc);
+
+      // Disable VBO's (vertex buffer objects) for attributes.
+      glBindBuffer(GL_ARRAY_BUFFER, 0);
+      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
+
+    }
+
+    GLint getAttributeLocation(const std::string &name) {
+      if(m_attribLocationCache.find(name) != m_attribLocationCache.end())
+        return m_attribLocationCache[name];
+
+      GLint loc = glGetAttribLocation(programId_, name.c_str());
+      m_attribLocationCache[name] = loc;
+      return loc;
+    }
+
+
+    GLuint programId() const { return programId_; }
+    bool isOK() const { return linked_; }
+
+    GLint getUniformLocation(const std::string &name) {
+      if(m_uniformLocationCache.find(name) != m_uniformLocationCache.end())
+        return m_uniformLocationCache[name];
+
+      GLint loc = glGetUniformLocation(programId_, name.c_str());
+      m_uniformLocationCache[name] = loc;
+      return loc;
+    }
+
+private:
+    std::unordered_map<std::string, GLint> m_uniformLocationCache;
+    std::unordered_map<std::string, GLint> m_attribLocationCache;
+    GLuint programId_;
+    bool linked_;
+    GLint success;
+    GLint linkSuccess;
+
+
+};
+
+
+bool loadCShaders(int index = 0);
+void reConfigureCShaders(int index = 0);
+void unloadCShaders();
+
+CGLShaderProgram *CGetStaticTriShader();
+#endif

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/DepthFont.cpp

@@ -0,0 +1,179 @@
+/***************************************************************************
+ *
+ * Project:  OpenCPN
+ * Purpose:  texture OpenGL text rendering built from wxFont
+ * Author:   Sean D'Epagnier
+ *
+ ***************************************************************************
+ *   Copyright (C) 2014 Sean D'Epagnier                                    *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ **************************************************************************/
+
+#include <wx/wx.h>
+
+#include "s52plibGL.h"
+
+#include "DepthFont.h"
+#include "s52_plib_utils.h"
+
+DepthFont::DepthFont() {
+  texobj = 0;
+  m_built = false;
+  m_scaleFactor = 0;
+  m_ContentScaleFactor = 1.0;
+}
+
+DepthFont::~DepthFont() { Delete(); }
+
+void DepthFont::Build(wxFont *font, double scale, double dip_factor) {
+  /* avoid rebuilding if the parameters are the same */
+  if (m_built && (*font == m_font)) return;
+
+  m_font = *font;
+  m_scaleFactor = scale;
+  m_dip_factor = dip_factor;
+
+  m_maxglyphw = 0;
+  m_maxglyphh = 0;
+
+  double scaler = m_ContentScaleFactor * dip_factor;
+
+  wxFont *scaled_font = GetS52Utils()->GetFont(font, scaler);
+  wxScreenDC sdc;
+  sdc.SetFont(*scaled_font);
+
+  for (int i = 0; i < 10; i++) {
+    wxCoord gw, gh;
+    wxString text;
+    text = wxString::Format(_T("%d"), i);
+    wxCoord descent, exlead;
+    sdc.GetTextExtent(text, &gw, &gh, &descent, &exlead,
+                      scaled_font);  // measure the text
+
+    tgi[i].width = gw;
+    tgi[i].height = gh;  // - descent;
+
+    tgi[i].advance = gw;
+    tgi[i].advance *= dip_factor;
+    if (i == 1)
+      m_width_one = gw;
+
+    m_maxglyphw = wxMax(tgi[i].width + tgi[i].advance, m_maxglyphw);
+    m_maxglyphh = wxMax(tgi[i].height, m_maxglyphh);
+  }
+
+  int w = 10 * m_maxglyphw;
+  int h = m_maxglyphh;
+
+  /* make power of 2 */
+
+  for (tex_w = 1; tex_w < w; tex_w *= 2)
+    ;
+  for (tex_h = 1; tex_h < h; tex_h *= 2)
+    ;
+
+  wxBitmap tbmp(tex_w, tex_h);
+  wxMemoryDC dc;
+  dc.SelectObject(tbmp);
+  dc.SetFont(*scaled_font);
+
+  /* fill bitmap with black */
+  dc.SetBackground(wxBrush(wxColour(0, 0, 0)));
+  dc.Clear();
+
+  /* draw the text white */
+  dc.SetTextForeground(wxColour(255, 255, 255));
+
+  /*    wxPen pen(wxColour( 255, 255, 255 ));
+      wxBrush brush(wxColour( 255, 255, 255 ), wxTRANSPARENT);
+      dc.SetPen(pen);
+      dc.SetBrush(brush);
+   */
+  int row = 0, col = 0;
+  for (int i = 0; i < 10; i++) {
+    tgi[i].x = col * m_maxglyphw;
+    tgi[i].y = row * m_maxglyphh;
+
+    wxString text;
+    text = wxString::Format(_T("%d"), i);
+
+    dc.DrawText(text, tgi[i].x, tgi[i].y);
+
+    col++;
+  }
+
+  dc.SelectObject(wxNullBitmap);
+
+  wxImage image = tbmp.ConvertToImage();
+
+  GLuint format, internalformat;
+  int stride;
+
+  format = GL_ALPHA;
+  internalformat = format;
+  stride = 1;
+
+  unsigned char *imgdata = image.GetData();
+
+  if (imgdata) {
+    unsigned char *teximage = (unsigned char *)malloc(stride * tex_w * tex_h);
+
+    for (int j = 0; j < tex_w * tex_h; j++)
+      for (int k = 0; k < stride; k++)
+        teximage[j * stride + k] = imgdata[3 * j];
+
+    glGenTextures(1, &texobj);
+    glBindTexture(GL_TEXTURE_2D, texobj);
+
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+
+    glTexImage2D(GL_TEXTURE_2D, 0, internalformat, tex_w, tex_h, 0, format,
+                 GL_UNSIGNED_BYTE, teximage);
+
+    free(teximage);
+  }
+
+  m_built = true;
+}
+
+void DepthFont::Delete() {
+  if (texobj) {
+    glDeleteTextures(1, &texobj);
+    texobj = 0;
+  }
+  m_built = false;
+  m_scaleFactor = 0;
+}
+
+bool DepthFont::GetGLTextureRect(wxRect &texrect, int symIndex) {
+  if (symIndex < 10) {
+    texrect.x = tgi[symIndex].x;
+    texrect.y = tgi[symIndex].y;
+    texrect.width = tgi[symIndex].width + (m_width_one / 10);
+    texrect.height = tgi[symIndex].height;
+    return true;
+  } else {
+    texrect.x = tgi[0].x;
+    texrect.y = tgi[0].y;
+    texrect.width = tgi[0].width;
+    texrect.height = tgi[0].height;
+    return false;
+  }
+}

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/DepthFont.h

@@ -0,0 +1,72 @@
+/***************************************************************************
+ *
+ * Project:  OpenCPN
+ * Purpose:  OpenGL text rendering
+ * Author:   David Register, Sean D'Epagnier
+ *
+ ***************************************************************************
+ *   Copyright (C) 2020 David Register                                    *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ **************************************************************************/
+
+#ifndef __DEPTHFONT_H__
+#define __DEPTHFONT_H__
+
+#include <wx/font.h>
+
+#define SOUND_MAX_GLYPH 50
+
+struct SoundTexGlyphInfo {
+  int x, y, width, height;
+  float advance;
+};
+
+class DepthFont {
+public:
+  DepthFont();
+  ~DepthFont();
+
+  void Build(wxFont *font, double scale, double dip_factor = 1.0);
+  void Delete();
+
+  bool IsBuilt() { return m_built; }
+  unsigned int GetTexture() { return texobj; }
+  bool GetGLTextureRect(wxRect &texrect, int symIndex);
+  wxSize GLTextureSize() { return wxSize(tex_w, tex_h); };
+  double GetScale() { return m_scaleFactor; }
+  void SetContentScaleFactor(double s){m_ContentScaleFactor = s;}
+
+private:
+  wxFont m_font;
+
+  SoundTexGlyphInfo tgi[SOUND_MAX_GLYPH];
+
+  unsigned int texobj;
+  int tex_w, tex_h;
+  int m_maxglyphw;
+  int m_maxglyphh;
+  bool m_built;
+
+  float m_dx;
+  float m_dy;
+  double m_scaleFactor;
+  double m_ContentScaleFactor;
+  int m_width_one;
+  double m_dip_factor;
+};
+
+#endif  // guard

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/TexFont.cpp

@@ -0,0 +1,542 @@
+/***************************************************************************
+ *
+ * Project:  OpenCPN
+ * Purpose:  texture OpenGL text rendering built from wxFont
+ * Author:   Sean D'Epagnier
+ *
+ ***************************************************************************
+ *   Copyright (C) 2014 Sean D'Epagnier                                    *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ **************************************************************************/
+
+#include <wx/wx.h>
+
+#ifdef ocpnUSE_GL
+#ifdef __OCPN_USE_GLEW__
+ #ifndef __OCPN__ANDROID__
+  #if defined(_WIN32)
+    #include "glew.h"
+  #elif defined(__WXQT__) || defined(__WXGTK__)
+   #include <GL/glew.h>
+  #endif
+ #endif
+#endif
+
+
+#if defined(__OCPN__ANDROID__)
+ #include <qopengl.h>
+ #include <GL/gl_private.h>  // this is a cut-down version of gl.h
+ #include <GLES2/gl2.h>
+#elif defined(_WIN32)
+ #define GL_GLEXT_PROTOTYPES
+ #include <GL/gl.h>
+ #include <GL/glu.h>
+ //typedef void (__stdcall * _GLUfuncptr)(void);
+#elif defined(__WXOSX__)
+ #include <OpenGL/gl.h>
+ #include <OpenGL/glu.h>
+ typedef void (*  _GLUfuncptr)();
+ #define GL_COMPRESSED_RGB_FXT1_3DFX       0x86B0
+#elif defined(__WXQT__) || defined(__WXGTK__)
+ #define GL_GLEXT_PROTOTYPES
+ #include <GL/glu.h>
+ #include <GL/gl.h>
+ #include <GL/glx.h>
+#endif
+#endif
+
+#include "TexFont.h"
+#include "linmath.h"
+#ifdef ocpnUSE_GL
+    #include "Cs52_shaders.h"
+
+CGLShaderProgram *m_TexFontShader;
+#endif
+
+#include "s52_plib_utils.h"
+
+TexFont::TexFont() {
+  texobj = 0;
+  m_blur = false;
+  m_built = false;
+  m_color = wxColor(0, 0, 0);
+  m_angle = 0;
+  m_ContentScaleFactor = 1.0;
+
+  m_shadersLoaded = false;
+
+}
+
+TexFont::~TexFont() { Delete(); }
+
+void TexFont::Build(wxFont &font, double scale_factor, double dpi_factor, bool blur) {
+  /* avoid rebuilding if the parameters are the same */
+  if (m_built && (font == m_font) && (blur == m_blur)) return;
+
+  m_font = font;
+  m_blur = blur;
+
+  m_maxglyphw = 0;
+  m_maxglyphh = 0;
+
+  double scaler = scale_factor / dpi_factor;
+  scaler /= m_ContentScaleFactor;
+
+  wxFont *scaled_font = GetS52Utils()->GetFont(&font, scaler);
+  wxScreenDC sdc;
+  sdc.SetFont(*scaled_font);
+
+  for (int i = MIN_GLYPH; i < MAX_GLYPH; i++) {
+    wxCoord gw, gh;
+    wxString text;
+    if (i == DEGREE_GLYPH)
+      text = wxString::Format(_T("%c"), 0x00B0);  //_T("?");
+    else
+      text = wxString::Format(_T("%c"), i);
+    wxCoord descent, exlead;
+    sdc.GetTextExtent(text, &gw, &gh, &descent, &exlead,
+                      scaled_font);  // measure the text
+
+    tgi[i].width = gw;
+    tgi[i].height = gh;
+
+    tgi[i].advance = gw;
+    tgi[i].advance *= dpi_factor;
+
+
+    m_maxglyphw = wxMax(tgi[i].width, m_maxglyphw);
+    m_maxglyphh = wxMax(tgi[i].height, m_maxglyphh);
+  }
+
+  /* add extra pixel to give a border between rows of characters
+     without this, in some cases a faint line can be see on the edge
+     from the character above */
+  m_maxglyphh++;
+
+  int w = COLS_GLYPHS * m_maxglyphw;
+  int h = ROWS_GLYPHS * m_maxglyphh;
+
+  wxASSERT(w < 2048 && h < 2048);
+
+  /* make power of 2 */
+  for (tex_w = 1; tex_w < w; tex_w *= 2)
+    ;
+  for (tex_h = 1; tex_h < h; tex_h *= 2)
+    ;
+
+  wxBitmap tbmp(tex_w, tex_h);
+  wxMemoryDC dc;
+  dc.SelectObject(tbmp);
+  dc.SetFont(*scaled_font);
+
+  /* fill bitmap with black */
+  dc.SetBackground(wxBrush(wxColour(0, 0, 0)));
+  dc.Clear();
+
+  /* draw the text white */
+  dc.SetTextForeground(wxColour(255, 255, 255));
+
+  /*    wxPen pen(wxColour( 255, 255, 255 ));
+      wxBrush brush(wxColour( 255, 255, 255 ), wxTRANSPARENT);
+      dc.SetPen(pen);
+      dc.SetBrush(brush);
+   */
+  int row = 0, col = 0;
+  for (int i = MIN_GLYPH; i < MAX_GLYPH; i++) {
+    if (col == COLS_GLYPHS) {
+      col = 0;
+      row++;
+    }
+
+    tgi[i].x = col * m_maxglyphw;
+    tgi[i].y = row * m_maxglyphh;
+
+    wxString text;
+    if (i == DEGREE_GLYPH)
+      text = wxString::Format(_T("%c"), 0x00B0);  //_T("?");
+    else
+      text = wxString::Format(_T("%c"), i);
+
+    dc.DrawText(text, tgi[i].x, tgi[i].y);
+
+    //        dc.DrawRectangle(tgi[i].x, tgi[i].y, tgi[i].advance,
+    //        tgi[i].height);
+    col++;
+  }
+
+  dc.SelectObject(wxNullBitmap);
+
+  wxImage image = tbmp.ConvertToImage();
+
+  unsigned int format = 0, internalformat = 0;
+  int stride;
+
+#ifdef ocpnUSE_GL
+  format = GL_ALPHA;
+#endif
+
+  internalformat = format;
+  stride = 1;
+
+  if (m_blur) image = image.Blur(1);
+
+  unsigned char *imgdata = image.GetData();
+
+  if (imgdata) {
+    unsigned char *teximage = (unsigned char *)malloc(stride * tex_w * tex_h);
+
+    for (int j = 0; j < tex_w * tex_h; j++)
+      for (int k = 0; k < stride; k++)
+        teximage[j * stride + k] = imgdata[3 * j];
+
+    Delete();
+
+#ifdef ocpnUSE_GL
+    glGenTextures(1, &texobj);
+    glBindTexture(GL_TEXTURE_2D, texobj);
+
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
+                    GL_NEAREST /*GL_LINEAR*/);
+    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+
+    glTexImage2D(GL_TEXTURE_2D, 0, internalformat, tex_w, tex_h, 0, format,
+                 GL_UNSIGNED_BYTE, teximage);
+#endif
+    free(teximage);
+
+  }
+
+  m_built = true;
+}
+
+void TexFont::Delete() {
+  if (texobj) {
+#ifdef ocpnUSE_GL
+    glDeleteTextures(1, &texobj);
+#endif
+    texobj = 0;
+  }
+  m_built = false;
+}
+
+void TexFont::GetTextExtent(const char *string, int *width, int *height) {
+  int w = 0, h = 0;
+
+  for (int i = 0; string[i]; i++) {
+    unsigned char c = string[i];
+    if (c == '\n') {
+      h += tgi[(int)'A'].height;
+      continue;
+    }
+    if (c == 0xc2 && (unsigned char)string[i + 1] == 0xb0) {
+      c = DEGREE_GLYPH;
+      i++;
+    }
+    if (c < MIN_GLYPH || c >= MAX_GLYPH) continue;
+
+    TexGlyphInfo &tgisi = tgi[c];
+    w += tgisi.advance;
+    if (tgisi.height > h) h = tgisi.height;
+  }
+  if (width) *width = w;
+  if (height) *height = h;
+}
+
+void TexFont::GetTextExtent(const wxString &string, int *width, int *height) {
+  GetTextExtent((const char *)string.ToUTF8(), width, height);
+}
+
+void TexFont::RenderGlyph(int c) {
+#ifdef ocpnUSE_GL
+  if (c < MIN_GLYPH || c >= MAX_GLYPH) return;
+
+  TexGlyphInfo &tgic = tgi[c];
+
+  int x = tgic.x, y = tgic.y;
+  float w = m_maxglyphw, h = m_maxglyphh;
+  float tx1 = (float)x / (float)tex_w;
+  float tx2 = (float)(x + w) / (float)tex_w;
+  float ty1 = (float)y / (float)tex_h;
+  float ty2 = (float)(y + h) / (float)tex_h;
+
+  if(!m_TexFontShader)
+    return;
+
+  float uv[8];
+  float coords[8];
+
+  // normal uv
+  uv[0] = tx1;
+  uv[1] = ty1;
+  uv[2] = tx2;
+  uv[3] = ty1;
+  uv[4] = tx2;
+  uv[5] = ty2;
+  uv[6] = tx1;
+  uv[7] = ty2;
+
+  // pixels
+  coords[0] = 0;
+  coords[1] = 0;
+  coords[2] = w;
+  coords[3] = 0;
+  coords[4] = w;
+  coords[5] = h;
+  coords[6] = 0;
+  coords[7] = h;
+
+  m_TexFontShader->Bind();
+
+   // Set up the texture sampler to texture unit 0
+  m_TexFontShader->SetUniform1i( "uTex", 0);
+
+  float colorv[4];
+  colorv[0] = m_color.Red() / float(256);
+  colorv[1] = m_color.Green() / float(256);
+  colorv[2] = m_color.Blue() / float(256);
+  colorv[3] = 0;
+
+  m_TexFontShader->SetUniform4fv( "color", colorv);
+
+  // Rotate
+  //float angle = 0;
+  mat4x4 I, Q;
+  mat4x4_identity(I);
+  mat4x4_identity(Q);
+  //mat4x4_rotate_Z(Q, I, m_angle);
+
+    // Translate
+  Q[3][0] = m_dx; // - m_vpwidth/2; //m_dx;
+  Q[3][1] = m_dy;// - m_vpheight/2; //m_dy;
+
+ // mat4x4_translate_in_place(I, m_dx, m_dy, 0);
+ // mat4x4_rotate_Z(Q, I, m_angle);
+  //mat4x4_translate_in_place(Q, -m_dx, -m_dy, 0);
+
+  m_TexFontShader->SetUniformMatrix4fv( "TransformMatrix", (GLfloat *)Q);
+
+// For some reason, glDrawElements is busted on Android
+// So we do this a hard ugly way, drawing two triangles...
+#if 0
+    GLushort indices1[] = {0,1,3,2};
+    glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_SHORT, indices1);
+#else
+
+  float co1[8];
+  co1[0] = coords[0];
+  co1[1] = coords[1];
+  co1[2] = coords[2];
+  co1[3] = coords[3];
+  co1[4] = coords[6];
+  co1[5] = coords[7];
+  co1[6] = coords[4];
+  co1[7] = coords[5];
+
+  float tco1[8];
+  tco1[0] = uv[0];
+  tco1[1] = uv[1];
+  tco1[2] = uv[2];
+  tco1[3] = uv[3];
+  tco1[4] = uv[6];
+  tco1[5] = uv[7];
+  tco1[6] = uv[4];
+  tco1[7] = uv[5];
+
+  m_TexFontShader->SetAttributePointerf( "position", co1);
+  m_TexFontShader->SetAttributePointerf( "aUV", tco1);
+
+  glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+  m_TexFontShader->UnBind();
+
+#endif
+
+  m_dx += tgic.advance; // * cos(m_angle); // + tgic.advance * sin(m_angle);
+  //m_dy += tgic.advance * sin(m_angle); // - tgic.advance * cos(m_angle);
+#endif
+}
+
+void TexFont::RenderString(const char *string, int x, int y, float angle) {
+#ifdef ocpnUSE_GL
+
+#if !defined(USE_ANDROID_GLES2) && !defined(ocpnUSE_GLSL)
+
+  glPushMatrix();
+  glTranslatef(x, y, 0);
+
+  glPushMatrix();
+  glBindTexture(GL_TEXTURE_2D, texobj);
+
+  for (int i = 0; string[i]; i++) {
+    if (string[i] == '\n') {
+      glPopMatrix();
+      glTranslatef(0, tgi[(int)'A'].height, 0);
+      glPushMatrix();
+      continue;
+    }
+    /* degree symbol */
+    if ((unsigned char)string[i] == 0xc2 &&
+        (unsigned char)string[i + 1] == 0xb0) {
+      RenderGlyph(DEGREE_GLYPH);
+      i++;
+      continue;
+    }
+    RenderGlyph(string[i]);
+  }
+
+  glPopMatrix();
+  glPopMatrix();
+#else
+  //FIXME (dave)  this is awful code, drawing chars glyph at a time.
+  //FIXME (dave)  Also, need to render string at an angle....
+  m_dx = (x - m_vpwidth/2) * cos(angle) + (y - m_vpheight/2) * sin(angle);
+  m_dx += m_vpwidth/2;
+  m_dy = -(x - m_vpwidth/2) * sin(angle) + (y - m_vpheight/2) * cos(angle);
+  m_dy += m_vpheight/2;
+
+  m_dx = x;
+  m_dy = y;
+  m_angle = angle;
+
+  glBindTexture(GL_TEXTURE_2D, texobj);
+
+  for (int i = 0; string[i]; i++) {
+    if (string[i] == '\n') {
+      m_dy += tgi[(int)'A'].height;
+      continue;
+    }
+    /* degree symbol */
+    if ((unsigned char)string[i] == 0xc2 &&
+        (unsigned char)string[i + 1] == 0xb0) {
+      RenderGlyph(DEGREE_GLYPH);
+      i++;
+      continue;
+    }
+    RenderGlyph(string[i]);
+  }
+
+#endif
+#endif
+}
+
+void TexFont::RenderString(const wxString &string, int x, int y, float angle) {
+#ifdef ocpnUSE_GL
+  LoadTexFontShaders();
+#endif
+  RenderString((const char *)string.ToUTF8(), x, y, angle);
+}
+
+void TexFont::PrepareShader(int width, int height, double rotation){
+#ifdef ocpnUSE_GL
+  if(!m_TexFontShader)
+    LoadTexFontShaders();
+
+  m_vpwidth = width;
+  m_vpheight = height;
+
+  mat4x4 m;
+  float vp_transform[16];
+  mat4x4_identity(m);
+  mat4x4_scale_aniso((float(*)[4])vp_transform, m, 2.0 / (float)width,
+                     -2.0 / (float)height, 1.0);
+  // Rotate
+  mat4x4 Q;
+  mat4x4_rotate_Z(Q, (float(*)[4])vp_transform, rotation);
+  mat4x4_translate_in_place(Q, -width / 2.0, -height / 2.0, 0);
+
+  mat4x4 I;
+  mat4x4_identity(I);
+
+  m_TexFontShader->Bind();
+  m_TexFontShader->SetUniformMatrix4fv( "MVMatrix", (GLfloat *)Q);
+  m_TexFontShader->SetUniformMatrix4fv( "TransformMatrix", (GLfloat *)I);
+#endif
+}
+
+#ifdef ocpnUSE_GL
+#if defined(USE_ANDROID_GLES2) || defined(ocpnUSE_GLSL)
+
+#ifdef USE_ANDROID_GLES2
+const GLchar* TexFont_preamble =
+"\n";
+#else
+const GLchar* TexFont_preamble =
+"#version 120\n"
+"#define precision\n"
+"#define lowp\n"
+"#define mediump\n"
+"#define highp\n";
+#endif
+
+
+// 2D texture shader with color modulation, used for colored text
+static const GLchar *TexFont_vertex_shader_source =
+    "precision highp float;\n"
+    "attribute vec2 position;\n"
+    "attribute vec2 aUV;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+    "varying vec2 varCoord;\n"
+    "void main() {\n"
+    "   gl_Position = MVMatrix * TransformMatrix * vec4(position, 0.0, 1.0);\n"
+    "   //varCoord = aUV.st;\n"
+    "   varCoord = aUV;\n"
+    "}\n";
+
+static const GLchar *TexFont_fragment_shader_source =
+    "precision highp float;\n"
+    "uniform sampler2D uTex;\n"
+    "uniform vec4 color;\n"
+    "varying vec2 varCoord;\n"
+    "void main() {\n"
+    "   vec4 col=texture2D(uTex, varCoord);\n"
+    "   gl_FragColor = color;\n"
+    "   gl_FragColor.a = col.a;\n"
+    "}\n";
+
+
+#if 1
+
+bool TexFont::LoadTexFontShaders() {
+  bool ret_val = true;
+
+  // Are the shaders ready?
+  if(m_TexFontShader)
+    return true;
+
+ // Simple colored triangle shader
+  if (!m_TexFontShader) {
+    CGLShaderProgram *shaderProgram = new CGLShaderProgram;
+    shaderProgram->addShaderFromSource(TexFont_vertex_shader_source, GL_VERTEX_SHADER);
+    shaderProgram->addShaderFromSource(TexFont_fragment_shader_source, GL_FRAGMENT_SHADER);
+    shaderProgram->linkProgram();
+
+    if (shaderProgram->isOK())
+      m_TexFontShader = shaderProgram;
+  }
+
+  m_shadersLoaded = true;
+
+  return ret_val;
+}
+
+
+#endif
+#endif
+#endif

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/TexFont.h

@@ -0,0 +1,93 @@
+/***************************************************************************
+ *
+ * Project:  OpenCPN
+ * Purpose:  OpenGL text rendering
+ * Author:   Sean D'Epagnier
+ *
+ ***************************************************************************
+ *   Copyright (C) 2014 Sean D'Epagnier                                    *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ **************************************************************************/
+
+#ifndef __TEXFONT_H__
+#define __TEXFONT_H__
+
+#include <wx/colour.h>
+#include <wx/font.h>
+
+/* support ascii plus degree symbol for now pack font in a single texture 16x8
+ */
+#define DEGREE_GLYPH 127
+#define MIN_GLYPH 32
+#define MAX_GLYPH 128
+
+#define NUM_GLYPHS (MAX_GLYPH - MIN_GLYPH)
+
+#define COLS_GLYPHS 16
+#define ROWS_GLYPHS ((NUM_GLYPHS / COLS_GLYPHS) + 1)
+
+struct TexGlyphInfo {
+  int x, y, width, height;
+  float advance;
+};
+
+class TexFont {
+public:
+  TexFont();
+  ~TexFont();
+
+  void Build(wxFont &font, double scale_factor, double dpi_factor, bool blur = false);
+  void Delete();
+
+  void GetTextExtent(const wxString &string, int *width, int *height);
+  void RenderString(const char *string, int x=0, int y=0, float angle = 0.0);
+  void RenderString(const wxString &string, int x=0, int y=0, float angle = 0.0);
+  bool IsBuilt() { return m_built; }
+  void SetColor(wxColor &color) { m_color = color; }
+  void PrepareShader(int width, int height, double rotation);
+  void SetContentScaleFactor(double s){m_ContentScaleFactor = s;}
+
+private:
+  void GetTextExtent(const char *string, int *width, int *height);
+  void RenderGlyph(int c);
+  bool LoadTexFontShaders();
+
+  wxFont m_font;
+  bool m_blur;
+
+  TexGlyphInfo tgi[MAX_GLYPH];
+
+  unsigned int texobj;
+  int tex_w, tex_h;
+  int m_maxglyphw;
+  int m_maxglyphh;
+  bool m_built;
+
+  float m_dx, m_dy;
+  float m_angle;
+  int m_vpwidth, m_vpheight;
+
+  wxColor m_color;
+
+  bool m_shadersLoaded;
+  double m_ContentScaleFactor;
+
+};
+
+TexFont *GetTexFont(wxFont *key);
+
+#endif  // guard

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/chartsymbols.cpp

@@ -0,0 +1,885 @@
+/***************************************************************************
+ *
+ * Project:  OpenCPN
+ * Purpose:  Chart Symbols
+ * Author:   Jesper Weissglas
+ *
+ ***************************************************************************
+ *   Copyright (C) 2010 by David S. Register                               *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ **************************************************************************/
+//#include "config.h"
+
+#include "wx/wxprec.h"
+
+#ifndef WX_PRECOMP
+#include "wx/wx.h"
+#endif
+
+#include <wx/filename.h>
+#include <stdlib.h>
+
+#if defined(__OCPN__ANDROID__)
+ #include <qopengl.h>
+ #include <GL/gl_private.h>  // this is a cut-down version of gl.h
+ #include <GLES2/gl2.h>
+#elif defined(__MSVC__)
+ #include "glew.h"
+#elif defined(__WXOSX__)
+ #include <OpenGL/gl.h>
+ #include <OpenGL/glu.h>
+ typedef void (*  _GLUfuncptr)();
+ #define GL_COMPRESSED_RGB_FXT1_3DFX       0x86B0
+#elif defined(__WXQT__) || defined(__WXGTK__)
+ #include <GL/glew.h>
+ #include <GL/glu.h>
+#endif
+
+#include "chartsymbols.h"
+#ifdef ocpnUSE_GL
+#include <wx/glcanvas.h>
+#endif
+
+#include "s52plib.h"
+
+//--------------------------------------------------------------------------------------
+
+ChartSymbols::ChartSymbols(void) {}
+
+ChartSymbols::~ChartSymbols(void) {}
+
+void ChartSymbols::InitializeTables(void) {
+  rasterSymbolsLoadedColorMapNumber = -1;
+  ColorTableIndex = 0;
+  rasterSymbolsTexture = 0;
+}
+
+void ChartSymbols::DeleteGlobals(void) {
+  m_symbolGraphicLocations.clear();
+
+  for (unsigned int i = 0; i < m_colorTables.GetCount(); i++) {
+    colTable *ct = (colTable *)m_colorTables.Item(i);
+    delete ct->tableName;
+    ct->colors.clear();
+    ct->wxColors.clear();
+    delete ct;
+  }
+
+  m_colorTables.Clear();
+}
+
+void ChartSymbols::ProcessColorTables(pugi::xml_node &node) {
+  for (pugi::xml_node child = node.first_child(); child != 0;
+       child = child.next_sibling()) {
+    const char *pcn = child.name();
+
+    if (!strcmp(pcn, "color-table")) {
+      colTable *colortable = new colTable;
+      colortable->tableName =
+          new wxString(child.first_attribute().value(), wxConvUTF8);
+
+      pugi::xml_node colorNode = child.first_child();
+      while (colorNode) {
+        if (!strcmp(colorNode.name(), "graphics-file")) {
+          colortable->rasterFileName =
+              wxString(colorNode.first_attribute().value(), wxConvUTF8);
+        }
+
+        if (!strcmp(colorNode.name(), "color")) {
+          wxString key;
+          S52color color;
+
+          for (pugi::xml_attribute attr = colorNode.first_attribute(); attr;
+               attr = attr.next_attribute()) {
+            const char *pca = attr.name();
+            if (!strcmp(pca, "name")) {
+              strncpy(color.colName, attr.value(), 5);
+              color.colName[5] = 0;
+              key = wxString(attr.value(), wxConvUTF8);
+
+            } else if (!strcmp(pca, "r")) {
+              color.R = attr.as_int();
+            } else if (!strcmp(pca, "g")) {
+              color.G = attr.as_int();
+            } else if (!strcmp(pca, "b")) {
+              color.B = attr.as_int();
+            }
+          }
+
+          colortable->colors[key] = color;
+          wxColour wxcolor(color.R, color.G, color.B);
+          colortable->wxColors[key] = wxcolor;
+        }
+
+        colorNode = colorNode.next_sibling();
+      }
+
+      m_colorTables.Add((void *)colortable);
+    }
+  }
+}
+
+#define TGET_INT_PROPERTY_VALUE(node, name, target)      \
+  propVal = wxString(node->Attribute(name), wxConvUTF8); \
+  propVal.ToLong(&numVal, 0);                            \
+  target = numVal;
+void ChartSymbols::ProcessLookups(pugi::xml_node &node) {
+  Lookup lookup;
+
+  for (pugi::xml_node child = node.first_child(); child != 0;
+       child = child.next_sibling()) {
+    const char *pcn = child.name();
+
+    if (!strcmp(pcn, "lookup")) {
+      for (pugi::xml_attribute attr = child.first_attribute(); attr;
+           attr = attr.next_attribute()) {
+        const char *pca = attr.name();
+        if (!strcmp(pca, "name")) {
+          lookup.name = wxString(attr.value(), wxConvUTF8);
+        } else if (!strcmp(pca, "RCID")) {
+          lookup.RCID = attr.as_int();
+        } else if (!strcmp(pca, "id")) {
+          lookup.id = attr.as_int();
+        }
+      }
+    }
+
+    pugi::xml_node lookupNode = child.first_child();
+    while (lookupNode) {
+      const char *nodeText = lookupNode.first_child().value();
+
+      if (!strcmp(lookupNode.name(), "type")) {
+        if (!strcmp(nodeText, "Area"))
+          lookup.type = AREAS_T;
+        else if (!strcmp(nodeText, "Line"))
+          lookup.type = LINES_T;
+        else
+          lookup.type = POINT_T;
+      } else if (!strcmp(lookupNode.name(), "disp-prio")) {
+        if (!strcmp(nodeText, "Group 1"))
+          lookup.displayPrio = PRIO_GROUP1;
+        else if (!strcmp(nodeText, "Area 1"))
+          lookup.displayPrio = PRIO_AREA_1;
+        else if (!strcmp(nodeText, "Area 2"))
+          lookup.displayPrio = PRIO_AREA_2;
+        else if (!strcmp(nodeText, "Point Symbol"))
+          lookup.displayPrio = PRIO_SYMB_POINT;
+        else if (!strcmp(nodeText, "Line Symbol"))
+          lookup.displayPrio = PRIO_SYMB_LINE;
+        else if (!strcmp(nodeText, "Area Symbol"))
+          lookup.displayPrio = PRIO_SYMB_AREA;
+        else if (!strcmp(nodeText, "Routing"))
+          lookup.displayPrio = PRIO_ROUTEING;
+        else if (!strcmp(nodeText, "Hazards"))
+          lookup.displayPrio = PRIO_HAZARDS;
+        else if (!strcmp(nodeText, "Mariners"))
+          lookup.displayPrio = PRIO_MARINERS;
+        else
+          lookup.displayPrio = PRIO_NODATA;
+
+      }
+
+      else if (!strcmp(lookupNode.name(), "radar-prio")) {
+        if (!strcmp(nodeText, "On Top"))
+          lookup.radarPrio = RAD_OVER;
+        else
+          lookup.radarPrio = RAD_SUPP;
+      }
+
+      else if (!strcmp(lookupNode.name(), "table-name")) {
+        if (!strcmp(nodeText, "Simplified"))
+          lookup.tableName = SIMPLIFIED;
+        else if (!strcmp(nodeText, "Lines"))
+          lookup.tableName = LINES;
+        else if (!strcmp(nodeText, "Plain"))
+          lookup.tableName = PLAIN_BOUNDARIES;
+        else if (!strcmp(nodeText, "Symbolized"))
+          lookup.tableName = SYMBOLIZED_BOUNDARIES;
+        else
+          lookup.tableName = PAPER_CHART;
+      }
+
+      else if (!strcmp(lookupNode.name(), "display-cat")) {
+        if (!strcmp(nodeText, "Displaybase"))
+          lookup.displayCat = DISPLAYBASE;
+        else if (!strcmp(nodeText, "Standard"))
+          lookup.displayCat = STANDARD;
+        else if (!strcmp(nodeText, "Other"))
+          lookup.displayCat = OTHER;
+        else if (!strcmp(nodeText, "Mariners"))
+          lookup.displayCat = MARINERS_STANDARD;
+        else
+          lookup.displayCat = OTHER;
+      }
+
+      else if (!strcmp(lookupNode.name(), "comment")) {
+        lookup.comment = lookupNode.first_child().text().as_int();
+      }
+
+      else if (!strcmp(lookupNode.name(), "instruction")) {
+        wxString inst(nodeText, wxConvUTF8);
+        lookup.instruction = inst;
+        lookup.instruction.Append('\037');
+
+      }
+
+      else if (!strcmp(lookupNode.name(), "attrib-code")) {
+        int nc = strlen(nodeText);
+        if (nc >= 6) {  //  ignore spurious short fields
+          std::string attVal = std::string(nodeText);
+          if(attVal.length() == 6)
+            attVal += ' ';
+          lookup.attributeCodeArray.push_back(attVal);
+        }
+      }
+
+      lookupNode = lookupNode.next_sibling();
+    }
+
+    BuildLookup(lookup);
+    lookup.attributeCodeArray.clear();
+  }
+}
+
+void ChartSymbols::ProcessVectorTag(pugi::xml_node &vectorNode,
+                                    SymbolSizeInfo_t &vectorSize) {
+  vectorSize.size.x = vectorNode.attribute("width").as_int();
+  vectorSize.size.y = vectorNode.attribute("height").as_int();
+
+  for (pugi::xml_node child = vectorNode.first_child(); child != 0;
+       child = child.next_sibling()) {
+    const char *nodeType = child.name();
+
+    if (!strcmp(nodeType, "distance")) {
+      vectorSize.minDistance = child.attribute("min").as_int();
+      vectorSize.maxDistance = child.attribute("max").as_int();
+    }
+
+    else if (!strcmp(nodeType, "origin")) {
+      vectorSize.origin.x = child.attribute("x").as_int();
+      vectorSize.origin.y = child.attribute("y").as_int();
+    }
+
+    else if (!strcmp(nodeType, "pivot")) {
+      vectorSize.pivot.x = child.attribute("x").as_int();
+      vectorSize.pivot.y = child.attribute("y").as_int();
+    }
+  }
+}
+
+void ChartSymbols::ProcessLinestyles(pugi::xml_node &node) {
+  LineStyle lineStyle;
+
+  for (pugi::xml_node child = node.first_child(); child != 0;
+       child = child.next_sibling()) {
+    lineStyle.RCID = child.attribute("RCID").as_int();
+
+    pugi::xml_node lineNode = child.first_child();
+    while (lineNode) {
+      const char *nodeText = lineNode.first_child().value();
+      const char *nodeType = lineNode.name();
+
+      if (!strcmp(nodeType, "description"))
+        lineStyle.description = nodeText;
+      else if (!strcmp(nodeType, "name"))
+        lineStyle.name = nodeText;
+      else if (!strcmp(nodeType, "color-ref"))
+        lineStyle.colorRef = nodeText;
+      else if (!strcmp(nodeType, "HPGL"))
+        lineStyle.HPGL = nodeText;
+      else if (!strcmp(nodeType, "vector"))
+        ProcessVectorTag(lineNode, lineStyle.vectorSize);
+
+      lineNode = lineNode.next_sibling();
+    }
+    BuildLineStyle(lineStyle);
+  }
+}
+
+void ChartSymbols::ProcessPatterns(pugi::xml_node &node) {
+  OCPNPattern pattern;
+
+  for (pugi::xml_node child = node.first_child(); child != 0;
+       child = child.next_sibling()) {
+    pattern.RCID = child.attribute("RCID").as_int();
+
+    pattern.hasVector = false;
+    pattern.hasBitmap = false;
+    pattern.preferBitmap = true;
+
+    pugi::xml_node pattNode = child.first_child();
+    while (pattNode) {
+      const char *nodeText = pattNode.first_child().value();
+      const char *nodeType = pattNode.name();
+
+      if (!strcmp(nodeType, "description"))
+        pattern.description = nodeText;
+      else if (!strcmp(nodeType, "name"))
+        pattern.name = nodeText;
+      else if (!strcmp(nodeType, "filltype"))
+        pattern.fillType = nodeText[0];
+      else if (!strcmp(nodeType, "spacing"))
+        pattern.spacing = nodeText[0];
+      else if (!strcmp(nodeType, "definition"))
+        pattern.hasVector = !strcmp(nodeText, "V");
+      else if (!strcmp(nodeType, "color-ref"))
+        pattern.colorRef = nodeText;
+      else if (!strcmp(nodeType, "HPGL")) {
+        pattern.HPGL = nodeText;
+        pattern.hasVector = true;
+      }
+
+      else if (!strcmp(nodeType, "prefer-bitmap")) {
+        if (!strcmp(nodeText, "no"))
+          pattern.preferBitmap = false;
+        else if (!strcmp(nodeText, "false"))
+          pattern.preferBitmap = false;
+      }
+
+      else if (!strcmp(nodeType, "bitmap")) {
+        pattern.bitmapSize.size.x = pattNode.attribute("width").as_int();
+        pattern.bitmapSize.size.y = pattNode.attribute("height").as_int();
+
+        for (pugi::xml_node child = pattNode.first_child(); child != 0;
+             child = child.next_sibling()) {
+          const char *nodeType = child.name();
+
+          if (!strcmp(nodeType, "distance")) {
+            pattern.bitmapSize.minDistance = child.attribute("min").as_int();
+            pattern.bitmapSize.maxDistance = child.attribute("max").as_int();
+          } else if (!strcmp(nodeType, "origin")) {
+            pattern.bitmapSize.origin.x = child.attribute("x").as_int();
+            pattern.bitmapSize.origin.y = child.attribute("y").as_int();
+          } else if (!strcmp(nodeType, "pivot")) {
+            pattern.bitmapSize.pivot.x = child.attribute("x").as_int();
+            pattern.bitmapSize.pivot.y = child.attribute("y").as_int();
+          } else if (!strcmp(nodeType, "graphics-location")) {
+            pattern.bitmapSize.graphics.x = child.attribute("x").as_int();
+            pattern.bitmapSize.graphics.y = child.attribute("y").as_int();
+          }
+        }
+      }
+
+      else if (!strcmp(nodeType, "vector"))
+        ProcessVectorTag(pattNode, pattern.vectorSize);
+
+      pattNode = pattNode.next_sibling();
+    }
+
+    BuildPattern(pattern);
+  }
+}
+
+void ChartSymbols::ProcessSymbols(pugi::xml_node &node) {
+  ChartSymbol symbol;
+
+  for (pugi::xml_node child = node.first_child(); child != 0;
+       child = child.next_sibling()) {
+    symbol.RCID = child.attribute("RCID").as_int();
+
+    symbol.hasVector = false;
+    symbol.hasBitmap = false;
+    symbol.preferBitmap = true;
+
+    pugi::xml_node symbolNode = child.first_child();
+    while (symbolNode) {
+      const char *nodeText = symbolNode.first_child().value();
+      const char *nodeType = symbolNode.name();
+
+      if (!strcmp(nodeType, "description"))
+        symbol.description = nodeText;
+      else if (!strcmp(nodeType, "name"))
+        symbol.name = nodeText;
+      else if (!strcmp(nodeType, "definition"))
+        symbol.hasVector = !strcmp(nodeText, "V");
+      else if (!strcmp(nodeType, "color-ref"))
+        symbol.colorRef = nodeText;
+
+      else if (!strcmp(nodeType, "prefer-bitmap")) {
+        if (!strcmp(nodeText, "no"))
+          symbol.preferBitmap = false;
+        else if (!strcmp(nodeText, "false"))
+          symbol.preferBitmap = false;
+      }
+
+      else if (!strcmp(nodeType, "bitmap")) {
+        symbol.bitmapSize.size.x = symbolNode.attribute("width").as_int();
+        symbol.bitmapSize.size.y = symbolNode.attribute("height").as_int();
+        symbol.hasBitmap = true;
+
+        for (pugi::xml_node child = symbolNode.first_child(); child != 0;
+             child = child.next_sibling()) {
+          const char *nodeType = child.name();
+
+          if (!strcmp(nodeType, "distance")) {
+            symbol.bitmapSize.minDistance = child.attribute("min").as_int();
+            symbol.bitmapSize.maxDistance = child.attribute("max").as_int();
+          } else if (!strcmp(nodeType, "origin")) {
+            symbol.bitmapSize.origin.x = child.attribute("x").as_int();
+            symbol.bitmapSize.origin.y = child.attribute("y").as_int();
+          } else if (!strcmp(nodeType, "pivot")) {
+            symbol.bitmapSize.pivot.x = child.attribute("x").as_int();
+            symbol.bitmapSize.pivot.y = child.attribute("y").as_int();
+          } else if (!strcmp(nodeType, "graphics-location")) {
+            symbol.bitmapSize.graphics.x = child.attribute("x").as_int();
+            symbol.bitmapSize.graphics.y = child.attribute("y").as_int();
+          }
+        }
+      }
+
+      else if (!strcmp(nodeType, "vector")) {
+        symbol.vectorSize.size.x = symbolNode.attribute("width").as_int();
+        symbol.vectorSize.size.y = symbolNode.attribute("height").as_int();
+        symbol.hasVector = true;
+
+        for (pugi::xml_node child = symbolNode.first_child(); child != 0;
+             child = child.next_sibling()) {
+          const char *nodeType = child.name();
+
+          if (!strcmp(nodeType, "distance")) {
+            symbol.vectorSize.minDistance = child.attribute("min").as_int();
+            symbol.vectorSize.maxDistance = child.attribute("max").as_int();
+          } else if (!strcmp(nodeType, "origin")) {
+            symbol.vectorSize.origin.x = child.attribute("x").as_int();
+            symbol.vectorSize.origin.y = child.attribute("y").as_int();
+          } else if (!strcmp(nodeType, "pivot")) {
+            symbol.vectorSize.pivot.x = child.attribute("x").as_int();
+            symbol.vectorSize.pivot.y = child.attribute("y").as_int();
+          } else if (!strcmp(nodeType, "HPGL")) {
+            symbol.HPGL = wxString(child.first_child().value(), wxConvUTF8);
+          }
+        }
+      }
+
+      symbolNode = symbolNode.next_sibling();
+    }
+
+    BuildSymbol(symbol);
+  }
+}
+
+
+void ChartSymbols::BuildLookup(Lookup &lookup) {
+  auto LUP = new LUPrec();
+
+  LUP->RCID = lookup.RCID;
+  LUP->nSequence = lookup.id;
+  LUP->DISC = lookup.displayCat;
+  LUP->FTYP = lookup.type;
+  LUP->DPRI = lookup.displayPrio;
+  LUP->RPRI = lookup.radarPrio;
+  LUP->TNAM = lookup.tableName;
+  LUP->OBCL[6] = 0;
+  memcpy(LUP->OBCL, lookup.name.mb_str(), 7);
+
+  LUP->ATTArray = lookup.attributeCodeArray;
+
+  LUP->INST = lookup.instruction;
+  LUP->LUCM = lookup.comment;
+
+  // Add LUP to array
+  // Search the LUPArray to see if there is already a LUP with this RCID
+  // If found, replace it with the new LUP
+  // This provides a facility for updating the LUP tables after loading a basic
+  // set
+
+  unsigned int index = 0;
+  wxArrayOfLUPrec *pLUPARRAYtyped = plib->SelectLUPARRAY(LUP->TNAM);
+
+  while (index < pLUPARRAYtyped->GetCount()) {
+    auto pLUPCandidate = pLUPARRAYtyped->Item(index);
+    if (LUP->RCID == pLUPCandidate->RCID) {
+      pLUPARRAYtyped->RemoveAt(index);
+      plib->DestroyLUP(pLUPCandidate);  // empties the LUP
+      break;
+    }
+    index++;
+  }
+  pLUPARRAYtyped->Add(LUP);
+}
+
+void ChartSymbols::BuildLineStyle(LineStyle &lineStyle) {
+  Rule *lnstmp = NULL;
+  Rule *lnst = (Rule *)calloc(1, sizeof(Rule));
+  plib->pAlloc->Add(lnst);
+
+  lnst->RCID = lineStyle.RCID;
+  memcpy(lnst->name.PANM, lineStyle.name.mb_str(), 8);
+  lnst->bitmap.PBTM = NULL;
+
+  lnst->vector.LVCT = (char *)malloc(lineStyle.HPGL.Len() + 1);
+  strcpy(lnst->vector.LVCT, lineStyle.HPGL.mb_str());
+
+  lnst->colRef.LCRF = (char *)malloc(lineStyle.colorRef.Len() + 1);
+  strcpy(lnst->colRef.LCRF, lineStyle.colorRef.mb_str());
+
+  lnst->pos.line.minDist.PAMI = lineStyle.vectorSize.minDistance;
+  lnst->pos.line.maxDist.PAMA = lineStyle.vectorSize.maxDistance;
+
+  lnst->pos.line.pivot_x.PACL = lineStyle.vectorSize.pivot.x;
+  lnst->pos.line.pivot_y.PARW = lineStyle.vectorSize.pivot.y;
+
+  lnst->pos.line.bnbox_w.PAHL = lineStyle.vectorSize.size.x;
+  lnst->pos.line.bnbox_h.PAVL = lineStyle.vectorSize.size.y;
+
+  lnst->pos.line.bnbox_x.SBXC = lineStyle.vectorSize.origin.x;
+  lnst->pos.line.bnbox_y.SBXR = lineStyle.vectorSize.origin.y;
+
+  lnstmp = (*plib->_line_sym)[lineStyle.name];
+
+  if (NULL == lnstmp)
+    (*plib->_line_sym)[lineStyle.name] = lnst;
+  else if (strncmp(lnst->name.LINM, lnstmp->name.LINM, 8))
+    (*plib->_line_sym)[lineStyle.name] = lnst;
+}
+
+
+void ChartSymbols::BuildPattern(OCPNPattern &pattern) {
+  Rule *pattmp = NULL;
+
+  Rule *patt = (Rule *)calloc(1, sizeof(Rule));
+  plib->pAlloc->Add(patt);
+
+  patt->RCID = pattern.RCID;
+  patt->exposition.PXPO = new wxString(pattern.description);
+  memcpy(patt->name.PANM, pattern.name.mb_str(), 8);
+  patt->bitmap.PBTM = NULL;
+  patt->fillType.PATP = pattern.fillType;
+  patt->spacing.PASP = pattern.spacing;
+
+  patt->vector.PVCT = (char *)malloc(pattern.HPGL.Len() + 1);
+  strcpy(patt->vector.PVCT, pattern.HPGL.mb_str());
+
+  patt->colRef.PCRF = (char *)malloc(pattern.colorRef.Len() + 1);
+  strcpy(patt->colRef.PCRF, pattern.colorRef.mb_str());
+
+  SymbolSizeInfo_t patternSize;
+
+  if (pattern.hasVector && !(pattern.preferBitmap && pattern.hasBitmap)) {
+    patt->definition.PADF = 'V';
+    patternSize = pattern.vectorSize;
+  } else {
+    patt->definition.PADF = 'R';
+    patternSize = pattern.bitmapSize;
+  }
+
+  patt->pos.patt.minDist.PAMI = patternSize.minDistance;
+  patt->pos.patt.maxDist.PAMA = patternSize.maxDistance;
+
+  patt->pos.patt.pivot_x.PACL = patternSize.pivot.x;
+  patt->pos.patt.pivot_y.PARW = patternSize.pivot.y;
+
+  patt->pos.patt.bnbox_w.PAHL = patternSize.size.x;
+  patt->pos.patt.bnbox_h.PAVL = patternSize.size.y;
+
+  patt->pos.patt.bnbox_x.SBXC = patternSize.origin.x;
+  patt->pos.patt.bnbox_y.SBXR = patternSize.origin.y;
+
+  wxRect graphicsLocation(pattern.bitmapSize.graphics, pattern.bitmapSize.size);
+  m_symbolGraphicLocations[pattern.name] = graphicsLocation;
+
+  // check if key already there
+
+  pattmp = (*plib->_patt_sym)[pattern.name];
+
+  if (NULL == pattmp) {
+    (*plib->_patt_sym)[pattern.name] = patt;  // insert in hash table
+  } else  // already something here with same key...
+  {       // if the pattern names are not identical
+    if (strncmp(patt->name.PANM, pattmp->name.PANM, 8)) {
+      (*plib->_patt_sym)[pattern.name] = patt;  // replace the pattern
+      plib->DestroyPatternRuleNode(
+          pattmp);  // remember to free to replaced node
+                    // the node itself is destroyed as part of pAlloc
+    }
+  }
+}
+
+
+void ChartSymbols::BuildSymbol(ChartSymbol &symbol) {
+  Rule *symb = (Rule *)calloc(1, sizeof(Rule));
+  plib->pAlloc->Add(symb);
+
+  wxString SVCT;
+  wxString SCRF;
+
+  symb->RCID = symbol.RCID;
+  memcpy(symb->name.SYNM, symbol.name.char_str(), 8);
+
+  symb->exposition.SXPO = new wxString(symbol.description);
+
+  symb->vector.SVCT = (char *)malloc(symbol.HPGL.Len() + 1);
+  strcpy(symb->vector.SVCT, symbol.HPGL.mb_str());
+
+  symb->colRef.SCRF = (char *)malloc(symbol.colorRef.Len() + 1);
+  strcpy(symb->colRef.SCRF, symbol.colorRef.mb_str());
+
+  symb->bitmap.SBTM = NULL;
+
+  SymbolSizeInfo_t symbolSize;
+
+  if (symbol.hasVector && !(symbol.preferBitmap && symbol.hasBitmap)) {
+    symb->definition.SYDF = 'V';
+    symbolSize = symbol.vectorSize;
+  } else {
+    symb->definition.SYDF = 'R';
+    symbolSize = symbol.bitmapSize;
+  }
+
+  symb->pos.symb.minDist.PAMI = symbolSize.minDistance;
+  symb->pos.symb.maxDist.PAMA = symbolSize.maxDistance;
+
+  symb->pos.symb.pivot_x.SYCL = symbolSize.pivot.x;
+  symb->pos.symb.pivot_y.SYRW = symbolSize.pivot.y;
+
+  symb->pos.symb.bnbox_w.SYHL = symbolSize.size.x;
+  symb->pos.symb.bnbox_h.SYVL = symbolSize.size.y;
+
+  symb->pos.symb.bnbox_x.SBXC = symbolSize.origin.x;
+  symb->pos.symb.bnbox_y.SBXR = symbolSize.origin.y;
+
+  wxRect graphicsLocation(symbol.bitmapSize.graphics, symbol.bitmapSize.size);
+  m_symbolGraphicLocations[symbol.name] = graphicsLocation;
+
+  // Already something here with same key? Then free its strings, otherwise they
+  // leak.
+  Rule *symbtmp = (*plib->_symb_sym)[symbol.name];
+  if (symbtmp) {
+    free(symbtmp->colRef.SCRF);
+    free(symbtmp->vector.SVCT);
+    delete symbtmp->exposition.SXPO;
+  }
+
+  (*plib->_symb_sym)[symbol.name] = symb;
+}
+
+bool ChartSymbols::LoadConfigFile(s52plib *plibArg,
+                                  const wxString &s52ilePath) {
+  plib = plibArg;
+
+  // Expect to find library data XML file in same folder as other S52 data.
+  // Files in CWD takes precedence.
+
+  wxString name, extension;
+  wxString xmlFileName = _T("chartsymbols.xml");
+
+  wxFileName::SplitPath(s52ilePath, &configFileDirectory, &name, &extension);
+  wxString fullFilePath =
+      configFileDirectory + wxFileName::GetPathSeparator() + xmlFileName;
+
+  if (wxFileName::FileExists(xmlFileName)) {
+    fullFilePath = xmlFileName;
+    configFileDirectory = _T(".");
+  }
+
+  if (!wxFileName::FileExists(fullFilePath)) {
+    wxString msg(_T("ChartSymbols ConfigFile not found: "));
+    msg += fullFilePath;
+    wxLogMessage(msg);
+    return false;
+  }
+
+  if (m_symbolsDoc.load_file(fullFilePath.fn_str())) {
+    wxString msg(_T("ChartSymbols loaded from "));
+    msg += fullFilePath;
+    wxLogMessage(msg);
+
+    pugi::xml_node elements = m_symbolsDoc.child("chartsymbols");
+
+    for (pugi::xml_node element = elements.first_child(); element;
+         element = element.next_sibling()) {
+      if (!strcmp(element.name(), "color-tables"))
+        ProcessColorTables(element);
+      else if (!strcmp(element.name(), "lookups"))
+        ProcessLookups(element);
+      else if (!strcmp(element.name(), "line-styles"))
+        ProcessLinestyles(element);
+      else if (!strcmp(element.name(), "patterns"))
+        ProcessPatterns(element);
+      else if (!strcmp(element.name(), "symbols"))
+        ProcessSymbols(element);
+    }
+    m_symbolsDoc.reset();  // purge the document to recover memory;
+  }
+
+
+  return true;
+}
+void ChartSymbols::SetColorTableIndex(int index, bool flush,
+                                      const ChartCtx& ctx) {
+  ColorTableIndex = index;
+  LoadRasterFileForColorTable(ColorTableIndex, flush, ctx);
+}
+
+int ChartSymbols::LoadRasterFileForColorTable(int tableNo, bool flush,
+                                              const ChartCtx& ctx) {
+  if (tableNo == rasterSymbolsLoadedColorMapNumber && !flush) {
+    if (ctx.m_use_opengl) {
+      if (rasterSymbolsTexture) return true;
+#ifdef ocpnUSE_GL
+      if (!ctx.m_texture_rectangle_format && rasterSymbols.IsOk())
+        return true;
+#endif
+    }
+    if (rasterSymbols.IsOk()) return true;
+  }
+
+  colTable *coltab = (colTable *)m_colorTables.Item(tableNo);
+
+  wxString filename = configFileDirectory + wxFileName::GetPathSeparator() +
+                      coltab->rasterFileName;
+
+  wxImage rasterFileImg;
+  if (rasterFileImg.LoadFile(filename, wxBITMAP_TYPE_PNG)) {
+#ifdef ocpnUSE_GL
+    /* for opengl mode, load the symbols into a texture */
+    if (ctx.m_use_opengl && ctx.m_texture_rectangle_format) {
+      int w = rasterFileImg.GetWidth();
+      int h = rasterFileImg.GetHeight();
+
+      //    Get the glRGBA format data from the wxImage
+      unsigned char *d = rasterFileImg.GetData();
+      unsigned char *a = rasterFileImg.GetAlpha();
+
+      /* combine rgb with alpha */
+      unsigned char *e = (unsigned char *)malloc(w * h * 4);
+      if (d && a) {
+        for (int y = 0; y < h; y++)
+          for (int x = 0; x < w; x++) {
+            int off = (y * w + x);
+
+            e[off * 4 + 0] = d[off * 3 + 0];
+            e[off * 4 + 1] = d[off * 3 + 1];
+            e[off * 4 + 2] = d[off * 3 + 2];
+            e[off * 4 + 3] = a[off];
+          }
+      }
+      if (!rasterSymbolsTexture) glGenTextures(1, &rasterSymbolsTexture);
+
+      glBindTexture(ctx.m_texture_rectangle_format, rasterSymbolsTexture);
+
+      /* unfortunately this texture looks terrible with compression */
+      GLuint format = GL_RGBA;
+      glTexImage2D(ctx.m_texture_rectangle_format, 0, format, w, h, 0, GL_RGBA,
+                   GL_UNSIGNED_BYTE, e);
+
+      //             glTexParameteri( g_texture_rectangle_format,
+      //             GL_TEXTURE_MAG_FILTER, GL_NEAREST ); glTexParameteri(
+      //             g_texture_rectangle_format, GL_TEXTURE_MIN_FILTER,
+      //             GL_NEAREST );
+
+      glTexParameteri(ctx.m_texture_rectangle_format, GL_TEXTURE_WRAP_S,
+                      GL_CLAMP_TO_EDGE);
+      glTexParameteri(ctx.m_texture_rectangle_format, GL_TEXTURE_WRAP_T,
+                      GL_CLAMP_TO_EDGE);
+
+      glTexParameteri(ctx.m_texture_rectangle_format, GL_TEXTURE_MAG_FILTER,
+                      GL_LINEAR);  // No mipmapping
+      glTexParameteri(ctx.m_texture_rectangle_format, GL_TEXTURE_MIN_FILTER,
+                      GL_LINEAR);
+
+      rasterSymbolsTextureSize = wxSize(w, h);
+
+      glDisable(GL_TEXTURE_2D);
+
+      free(e);
+    }
+#endif
+    { rasterSymbols = wxBitmap(rasterFileImg, -1 /*32*/); }
+
+    rasterSymbolsLoadedColorMapNumber = tableNo;
+    return true;
+  }
+
+  wxString msg(_T("ChartSymbols...Failed to load raster symbols file "));
+  msg += filename;
+  wxLogMessage(msg);
+  return false;
+}
+
+
+S52color *ChartSymbols::GetColor(const char *colorName, int fromTable) {
+  colTable *colortable;
+  wxString key(colorName, wxConvUTF8, 5);
+  colortable = (colTable *)m_colorTables.Item(fromTable);
+  return &(colortable->colors[key]);
+}
+
+wxColor ChartSymbols::GetwxColor(const wxString &colorName, int fromTable) {
+  colTable *colortable;
+  colortable = (colTable *)m_colorTables.Item(fromTable);
+  wxColor c = colortable->wxColors[colorName];
+  return c;
+}
+
+wxColor ChartSymbols::GetwxColor(const char *colorName, int fromTable) {
+  wxString key(colorName, wxConvUTF8, 5);
+  return GetwxColor(key, fromTable);
+}
+
+int ChartSymbols::FindColorTable(const wxString &tableName) {
+  for (unsigned int i = 0; i < m_colorTables.GetCount(); i++) {
+    colTable *ct = (colTable *)m_colorTables.Item(i);
+    if (tableName.IsSameAs(*ct->tableName)) {
+      return i;
+    }
+  }
+  return 0;
+}
+
+bool ChartSymbols::UpdateTableColor( std::string table_name, std::string color_name, wxColor& new_color){
+  int table_index = FindColorTable( wxString(table_name.c_str()));
+
+  colTable *colortable = (colTable *)m_colorTables.Item(table_index);
+  wxString key(color_name.c_str(), wxConvUTF8, 5);
+
+  colortable->wxColors[key] = new_color;
+  if (colortable->colors.find(key) != colortable->colors.end()) {
+    S52color *color = &colortable->colors[key];
+    color->R = new_color.Red();
+    color->G = new_color.Green();
+    color->B = new_color.Blue();
+    return true;
+  }
+  else
+    return false;
+}
+
+
+wxString ChartSymbols::HashKey(const char *symbolName) {
+  char key[9];
+  key[8] = 0;
+  strncpy(key, symbolName, 8);
+  return wxString(key, wxConvUTF8);
+}
+
+wxImage ChartSymbols::GetImage(const char *symbolName) {
+  wxRect bmArea = m_symbolGraphicLocations[HashKey(symbolName)];
+  if (rasterSymbols.IsOk()) {
+    wxBitmap bitmap = rasterSymbols.GetSubBitmap(bmArea);
+    return bitmap.ConvertToImage();
+  } else
+    return wxImage(1, 1);
+}
+
+unsigned int ChartSymbols::GetGLTextureRect(wxRect &rect,
+                                            const char *symbolName) {
+  rect = m_symbolGraphicLocations[HashKey(symbolName)];
+  return rasterSymbolsTexture;
+}
+
+wxSize ChartSymbols::GLTextureSize() { return rasterSymbolsTextureSize; }

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/chartsymbols.h

@@ -0,0 +1,204 @@
+/***************************************************************************
+ *
+ * Project:  OpenCPN
+ * Purpose:  Chart Symbols
+ * Author:   Jesper Weissglas
+ *
+ ***************************************************************************
+ *   Copyright (C) 2010 by David S. Register                               *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ **************************************************************************/
+
+
+#ifndef _CHARTSYMBOLS_H_
+#define _CHARTSYMBOLS_H_
+
+#ifdef ocpnUSE_GL
+#ifdef __OCPN_USE_GLEW__
+ #ifndef __OCPN__ANDROID__
+  #if defined(_WIN32)
+    #include "glew.h"
+  #elif defined(__WXQT__) || defined(__WXGTK__)
+   #include <GL/glew.h>
+  #endif
+ #endif
+#endif
+#endif
+
+#if defined(__OCPN__ANDROID__)
+ //#include <GLES2/gl2.h>
+ #include <qopengl.h>
+ #include <GL/gl_private.h>  // this is a cut-down version of gl.h
+ #include <GLES2/gl2.h>
+#elif defined(_WIN32)
+ #define GL_GLEXT_PROTOTYPES
+ #include <GL/gl.h>
+ #include <GL/glu.h>
+ //typedef void (__stdcall * _GLUfuncptr)(void);
+#elif defined(__WXOSX__)
+ #include <OpenGL/gl.h>
+ #include <OpenGL/glu.h>
+ typedef void (*  _GLUfuncptr)();
+ #define GL_COMPRESSED_RGB_FXT1_3DFX       0x86B0
+#elif defined(__WXQT__) || defined(__WXGTK__)
+ #define GL_GLEXT_PROTOTYPES
+ #include <GL/glu.h>
+ #include <GL/gl.h>
+ #include <GL/glx.h>
+#endif
+
+
+
+#include "s52s57.h"
+#include "pugixml.hpp"
+class s52plib;
+
+WX_DECLARE_STRING_HASH_MAP(wxRect, symbolGraphicsHashMap);
+
+class Lookup {
+public:
+  int RCID;
+  int id;
+  wxString name;
+  Object_t type;                           // 'A' Area, 'L' Line, 'P' Point
+  DisPrio displayPrio;                     // Display Priority
+  RadPrio radarPrio;                       // 'O' or 'S', Radar Priority
+  LUPname tableName;                       // FTYP:  areas, points, lines
+  std::vector<std::string> attributeCodeArray;  // ArrayString of LUP Attributes
+  wxString instruction;                    // Instruction Field (rules)
+  DisCat displayCat;  // Display Categorie: D/S/O, DisplayBase, Standard, Other
+  int comment;        // Look-Up Comment (PLib3.x put 'groupes' here,
+};
+
+typedef struct _SymbolSizeInfo {
+  wxSize size;
+  wxPoint origin;
+  wxPoint pivot;
+  wxPoint graphics;
+  int minDistance;
+  int maxDistance;
+} SymbolSizeInfo_t;
+
+class OCPNPattern {
+public:
+  int RCID;
+  wxString name;
+  wxString description;
+  wxString colorRef;
+  bool hasVector;
+  bool hasBitmap;
+  bool preferBitmap;
+  char fillType;
+  char spacing;
+  SymbolSizeInfo_t bitmapSize;
+  SymbolSizeInfo_t vectorSize;
+  wxBitmap bitmap;
+  wxString HPGL;
+};
+
+class LineStyle {
+public:
+  int RCID;
+  wxString name;
+  wxString description;
+  wxString colorRef;
+  SymbolSizeInfo_t vectorSize;
+  wxBitmap bitmap;
+  wxString HPGL;
+};
+
+/** Generic method argument wrapping differences using opengl or not */
+struct ChartCtx {
+#ifdef ocpnUSE_GL
+  const  bool m_use_opengl;
+  const GLenum m_texture_rectangle_format;
+  ChartCtx(bool use_opengl, GLenum rect_format)
+    : m_use_opengl(use_opengl), m_texture_rectangle_format(rect_format) {}
+#else
+  const  bool m_use_opengl;
+  ChartCtx(bool use_opengl) : m_use_opengl(use_opengl) {}
+#endif
+};
+
+
+
+class ChartSymbol {
+public:
+  wxString name;
+  int RCID;
+  bool hasVector;
+  bool hasBitmap;
+  bool preferBitmap;
+  wxString description;
+  wxString colorRef;
+  SymbolSizeInfo_t bitmapSize;
+  SymbolSizeInfo_t vectorSize;
+  wxString HPGL;
+};
+
+class ChartSymbols {
+public:
+  ChartSymbols(void);
+  ~ChartSymbols(void);
+  bool LoadConfigFile(s52plib *plibArg, const wxString &path);
+
+  void InitializeTables(void);
+  void DeleteGlobals(void);
+  int FindColorTable(const wxString &tableName);
+  S52color *GetColor(const char *colorName, int fromTable);
+  wxColor GetwxColor(const wxString &colorName, int fromTable);
+  wxColor GetwxColor(const char *colorName, int fromTable);
+  wxString HashKey(const char *symbolName);
+  wxImage GetImage(const char *symbolName);
+  unsigned int GetGLTextureRect(wxRect &rect, const char *symbolName);
+  wxSize GLTextureSize();
+  void SetTextureFormat( int format){ m_texture_rectangle_format = format; }
+  int LoadRasterFileForColorTable(int table_nr, bool flush,
+                                  const ChartCtx& ctx);
+  void SetColorTableIndex(int index, bool flush, const ChartCtx& ctx);
+
+  wxArrayPtrVoid m_colorTables;
+  unsigned int rasterSymbolsTexture;
+  wxSize rasterSymbolsTextureSize;
+  wxBitmap rasterSymbols;
+  int rasterSymbolsLoadedColorMapNumber;
+  wxString configFileDirectory;
+  int ColorTableIndex;
+  symbolGraphicsHashMap m_symbolGraphicLocations;
+  bool UpdateTableColor( std::string table_name, std::string color_name, wxColor& new_color);
+
+private:
+  void BuildLineStyle(LineStyle &lineStyle);
+  void BuildLookup(Lookup &lookup);
+  void BuildPattern(OCPNPattern &pattern);
+  void BuildSymbol(ChartSymbol &symol);
+
+  void ProcessColorTables(pugi::xml_node &node);
+  void ProcessLookups(pugi::xml_node &node);
+  void ProcessLinestyles(pugi::xml_node &node);
+  void ProcessPatterns(pugi::xml_node &node);
+  void ProcessSymbols(pugi::xml_node &node);
+  void ProcessVectorTag(pugi::xml_node &vectorNode,
+                        SymbolSizeInfo_t &vectorSize);
+
+  pugi::xml_document m_symbolsDoc;
+  GLenum m_texture_rectangle_format;
+
+  s52plib *plib;
+};
+
+#endif

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/color_types.h

@@ -0,0 +1,58 @@
+/******************************************************************************
+ *
+ * Project:  OpenCP
+ * Purpose:  Color Types
+ * Author:   David Register
+ *
+ ***************************************************************************
+ *   Copyright (C) 2022 by David S. Register   *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ ***************************************************************************
+ *
+ */
+
+#ifndef _COLORTYPES_H_
+#define _COLORTYPES_H_
+
+typedef struct _S52color {
+  char colName[20];
+  unsigned char R;
+  unsigned char G;
+  unsigned char B;
+} S52color;
+
+WX_DECLARE_STRING_HASH_MAP(S52color, colorHashMap);
+WX_DECLARE_STRING_HASH_MAP(wxColour, wxColorHashMap);
+
+typedef enum ColorScheme {
+  GLOBAL_COLOR_SCHEME_RGB,
+  GLOBAL_COLOR_SCHEME_DAY,
+  GLOBAL_COLOR_SCHEME_DUSK,
+  GLOBAL_COLOR_SCHEME_NIGHT,
+  N_COLOR_SCHEMES
+} _ColorScheme;
+
+typedef struct _colTable {
+  wxString *tableName;
+  wxString rasterFileName;
+  wxArrayPtrVoid *color;
+  colorHashMap colors;
+  wxColorHashMap wxColors;
+} colTable;
+
+
+#endif

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/mygeom.h

@@ -0,0 +1,304 @@
+/******************************************************************************
+ *
+ * Project:  OpenCPN
+ * Purpose:  Tesselation of Polygon Object
+ * Author:   David Register
+ *
+ ***************************************************************************
+ *   Copyright (C) 2010 by David S. Register   *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.             *
+ ***************************************************************************
+ *
+ *
+ */
+
+
+#ifndef __MYGEOM_H
+#define __MYGEOM_H
+
+// For compilers that support precompilation, includes "wx/wx.h".
+#include "wx/wxprec.h"
+//#include <wx/wfstream.h>
+
+#if 0
+#if defined(__OCPN__ANDROID__)
+ #include <qopengl.h>
+ #include <GL/gl_private.h>  // this is a cut-down version of gl.h
+ #include <GLES2/gl2.h>
+#elif defined(__MSVC__)
+ #include "glew.h"
+#elif defined(__WXOSX__)
+ #include <OpenGL/gl.h>
+ #include <OpenGL/glu.h>
+ typedef void (*  _GLUfuncptr)();
+ #define GL_COMPRESSED_RGB_FXT1_3DFX       0x86B0
+#elif defined(__WXQT__) || defined(__WXGTK__)
+ #include <GL/glew.h>
+ #include <GL/glu.h>
+#endif
+#endif
+
+#if defined(__OCPN__ANDROID__)
+#include <qopengl.h>
+#include <GL/gl_private.h>  // this is a cut-down version of gl.h
+#include <GLES2/gl2.h>
+#else
+#ifdef ocpnUSE_GL
+#if defined(__MSVC__)
+#include "glew.h"
+#elif defined(__WXOSX__)
+#include <OpenGL/gl.h>
+#include <OpenGL/glu.h>
+typedef void (*  _GLUfuncptr)();
+#define GL_COMPRESSED_RGB_FXT1_3DFX       0x86B0
+#elif defined(__WXQT__) || defined(__WXGTK__)
+#include <GL/glew.h>
+#include <GL/glu.h>
+#endif
+#endif
+#endif
+
+
+class OGRGeometry;
+class OGRPolygon;
+
+#define TESS_VERT 0  // constants describing preferred tess orientation
+#define TESS_HORZ 1
+
+#define EQUAL_EPS 1.0e-7  // tolerance value
+
+//  nota bene  These definitions are identical to OpenGL prototypes
+#define PTG_TRIANGLES 0x0004
+#define PTG_TRIANGLE_STRIP 0x0005
+#define PTG_TRIANGLE_FAN 0x0006
+
+//  Error Return Codes
+#define ERROR_NONE 0
+#define ERROR_NO_DLL 1
+#define ERROR_BAD_OGRPOLY 2
+
+//  Some external prototypes
+
+#define DATA_TYPE_FLOAT 0
+#define DATA_TYPE_DOUBLE 1
+#define DATA_TYPE_SHORT 2
+
+//--------------------------------------------------------------------------------------------------
+//
+//      Internal data structures used for describing/rendering tesselated
+//      polygons
+//
+//--------------------------------------------------------------------------------------------------
+
+class Extended_Geometry {
+public:
+  Extended_Geometry();
+  ~Extended_Geometry();
+
+  OGRGeometry *pogrGeom;
+  int n_vector_indices;
+  int *pvector_index;
+  int n_contours;  // parameters passed to trapezoid tesselator
+  int *contour_array;
+  int n_max_vertex;
+  int pointx;
+  int pointy;
+  wxPoint2DDouble *vertex_array;
+  int xmin, xmax, ymin, ymax;
+  int n_max_edge_points;
+
+  //    Conversion parameters
+  //    for (assummed linear) convertions from vertex_array points to
+  //    easting/northing, metres from 0,0 To convert to lat/lon, use simple
+  //    merctor equations
+  double x_rate;
+  double x_offset;
+  double y_rate;
+  double y_offset;
+  double ref_lat;  // Lower left corner of the cell containing this feature
+  double ref_lon;
+};
+
+class TriPrim {
+public:
+  TriPrim();
+  ~TriPrim();
+  void FreeMem(void);
+
+  unsigned int type;  // Type of triangle primitive
+                      //  May be PTG_TRIANGLES
+                      //         PTG_TRIANGLE_STRIP
+                      //         PTG_TRIANGLE_FAN
+
+  int nVert;
+  double *p_vertex;  //  Pointer to vertex array, x,y,x,y.....
+
+  LLBBox tri_box;
+
+  TriPrim *p_next;  // chain link
+};
+
+class LegacyTriPrim {
+public:
+  LegacyTriPrim();
+  ~LegacyTriPrim();
+  void FreeMem(void);
+
+  unsigned int type;  // Type of triangle primitive
+  //  May be PTG_TRIANGLES
+  //         PTG_TRIANGLE_STRIP
+  //         PTG_TRIANGLE_FAN
+
+  int nVert;
+  double *p_vertex;  //  Pointer to vertex array, x,y,x,y.....
+
+  double minx, miny, maxx, maxy;
+
+  LegacyTriPrim *p_next;  // chain link
+};
+
+class PolyTriGroup {
+public:
+  PolyTriGroup();
+  PolyTriGroup(Extended_Geometry *pxGeom);
+  ~PolyTriGroup();
+
+  int nContours;
+  int *pn_vertex;      // pointer to array of poly vertex counts
+  float *pgroup_geom;  // pointer to Raw geometry, used for contour line drawing
+
+  TriPrim *tri_prim_head;  // head of linked list of TriPrims
+  bool m_bSMSENC;
+  bool bsingle_alloc;
+  unsigned char *single_buffer;
+  int single_buffer_size;
+  int data_type;  //  p_vertex in TriPrim chain is FLOAT or DOUBLE
+  float sfactor;
+  float soffset;
+
+private:
+  int my_bufgets(char *buf, int buf_len_max);
+};
+
+typedef struct {
+  int ilseg;
+  int irseg;
+  double loy;
+  double hiy;
+
+} trapz_t;
+
+//--------------------------------------------------------------------------------------------------
+//
+//      Triangle Tesselator Class
+//
+//--------------------------------------------------------------------------------------------------
+class OGRPolygon;
+class GLUtesselator;
+
+class PolyTessGeo {
+public:
+  PolyTessGeo();
+  ~PolyTessGeo();
+
+  PolyTessGeo(OGRPolygon *poly, bool bSENC_SM, double ref_lat, double ref_lon,
+              double LOD_meters);  // Build this from OGRPolygon
+
+  PolyTessGeo(Extended_Geometry *pxGeom);
+
+  PolyTessGeo(unsigned char *polybuf, int nrecl, int index,
+              int senc_file_version);
+
+  bool IsOk() { return m_bOK; }
+
+  int BuildDeferredTess(void);
+
+  double Get_xmin() { return xmin; }
+  double Get_xmax() { return xmax; }
+  double Get_ymin() { return ymin; }
+  double Get_ymax() { return ymax; }
+  void SetExtents(double x_left, double y_bot, double x_right, double y_top);
+
+  PolyTriGroup *Get_PolyTriGroup_head() { return m_ppg_head; }
+  int GetnVertexMax() { return m_nvertex_max; }
+  void SetnVertexMax(int max) { m_nvertex_max = max; }
+  int GetnContours() { return m_ncnt; }
+
+  int ErrorCode;
+  void GetRefPos( double *lat, double *lon);
+  void Set_PolyTriGroup_head(PolyTriGroup *head) { m_ppg_head = head; }
+  void Set_OK(bool bok) { m_bOK = bok; }
+
+  void SetPPGHead(PolyTriGroup *head) { m_ppg_head = head; }
+  int my_bufgets(char *buf, int buf_len_max);
+
+  GLUtesselator *GLUtessobj;
+  wxArrayPtrVoid *m_pCombineVertexArray;
+  double *m_pwork_buf;
+  int m_buf_len;
+  int m_buf_idx;
+  TriPrim *m_pTPG_Last;
+  TriPrim *m_pTPG_Head;
+  int m_gltri_type;
+  int m_nvcall;
+  int m_nvmax;
+  bool m_bmerc_transform;
+  double mx_rate, mx_offset, my_rate, my_offset;
+  bool m_b_senc_sm;
+  double m_ref_lat, m_ref_lon;
+  int m_tess_orient;
+  double m_feature_ref_lat, m_feature_ref_lon;
+  double m_feature_easting, m_feature_northing;
+
+  double earthAxis;
+  bool m_bcm93;
+
+private:
+  int BuildTess(void);
+  // int BuildTessGL2(void);
+  // int PolyTessGeoGL(OGRPolygon *poly, bool bSENC_SM, double ref_lat, double
+  // ref_lon);
+  int BuildTessGLU(void);
+  int BuildTessGLFromXG(void);
+
+  //  Data
+
+  bool m_bOK;
+
+  Extended_Geometry *m_pxgeom;
+
+  double xmin, xmax, ymin, ymax;
+  PolyTriGroup *m_ppg_head;  // head of a PolyTriGroup chain
+  int m_nvertex_max;         // and computed max vertex count
+                             // used by drawing primitives as
+                             // optimization
+
+  int m_ncnt;
+  int m_nwkb;
+  int *m_cntr;
+  char *m_buf_head;
+  char *m_buf_ptr;  // used to read passed SENC record
+  int m_nrecl;
+
+  double m_LOD_meters;
+
+  double **m_vertexPtrArray;
+  bool m_printStats;
+  bool m_bstripify;
+};
+
+#endif

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/s52_plib_utils.cpp

@@ -0,0 +1,20 @@
+#include "s52_plib_utils.h"
+
+static class _DefaultUtils : public S52PlibUtils {
+  /** Default implementation: return unscaled font. */
+  wxFont* GetFont(wxFont* font, double scale) override { return font; }
+  wxFont* GetDefaultFont(wxString label, int Ptsize) override {
+    return nullptr;
+  }
+  wxFont* GetScaledFont(int pointSize, wxFontFamily family, wxFontStyle style,
+                        wxFontWeight weight, const wxString faceName,
+                        double scale) override {
+    return nullptr;
+  }
+
+} DefaultUtils;
+
+static S52PlibUtils* s_the_utils = &DefaultUtils;
+
+S52PlibUtils* GetS52Utils() { return s_the_utils; }
+void SetUtils(S52PlibUtils* utils) { s_the_utils = utils; }

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/s52_plib_utils.h

@@ -0,0 +1,20 @@
+#ifndef S52_PLIB_UTILS_H
+#define S52_PLIB_UTILS_H
+
+#include <wx/font.h>
+
+/** Interface implemented by calling code */
+class S52PlibUtils {
+public:
+  /** Get a scaled font based on given; created if not already existing. */
+  virtual wxFont* GetFont(wxFont* font, double scale) = 0;
+  virtual wxFont* GetDefaultFont(wxString label, int Ptsize) = 0;
+  virtual wxFont* GetScaledFont(int pointSize, wxFontFamily family,
+                                wxFontStyle style, wxFontWeight weight,
+                                const wxString faceName, double scale) = 0;
+};
+
+S52PlibUtils* GetS52Utils();
+
+void SetUtils(S52PlibUtils* utils);
+#endif  // S52_PLIB_UTILS_H

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/s52plib.h

@@ -0,0 +1,737 @@
+/***************************************************************************
+ *
+ * Project:  OpenCPN
+ * Purpose:  S52 Presentation Library
+ * Author:   David Register
+ *
+ ***************************************************************************
+ *   Copyright (C) 2010 by David S. Register                               *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ **************************************************************************/
+
+#ifndef _S52PLIB_H_
+#define _S52PLIB_H_
+
+#include <vector>
+#include "s52s57.h"  //types
+
+class wxGLContext;
+
+#include "LLRegion.h"
+#include "DepthFont.h"
+#include "chartsymbols.h"
+#include "TexFont.h"
+
+#include <wx/dcgraph.h>  // supplemental, for Mac
+#include <unordered_map>
+
+//    ChartType constants
+typedef enum S52_ChartTypeEnum {
+  S52_CHART_TYPE_UNKNOWN = 0,
+  S52_CHART_TYPE_DUMMY,
+  S52_CHART_TYPE_DONTCARE,
+  S52_CHART_TYPE_KAP,
+  S52_CHART_TYPE_GEO,
+  S52_CHART_TYPE_S57,
+  S52_CHART_TYPE_CM93,
+  S52_CHART_TYPE_CM93COMP,
+  S52_CHART_TYPE_PLUGIN,
+  S52_CHART_TYPE_MBTILES
+} _S52_ChartTypeEnum;
+
+// Correct some deficincies in MacOS OpenGL include files
+#ifdef __WXOSX__
+typedef void (*PFNGLGENBUFFERSPROC)(GLsizei n, GLuint *buffers);
+typedef void (*PFNGLBINDBUFFERPROC)(GLenum target, GLuint buffer);
+typedef void (*PFNGLDELETEBUFFERSPROC)(GLsizei n, const GLuint *buffers);
+typedef void (*PFNGLGETBUFFERPARAMETERIVPROC)(GLenum target, GLenum pname,
+                                              GLint *params);
+typedef void (*PFNGLDELETERENDERBUFFERSEXTPROC)(GLsizei n,
+                                                const GLuint *renderbuffers);
+typedef void (*PFNGLDELETEFRAMEBUFFERSEXTPROC)(GLsizei n,
+                                               const GLuint *framebuffers);
+typedef void (*PFNGLCOMPRESSEDTEXSUBIMAGE1DPROC)(GLenum target, GLint level,
+                                                 GLint xoffset, GLsizei width,
+                                                 GLenum format,
+                                                 GLsizei imageSize,
+                                                 const GLvoid *data);
+typedef void (*PFNGLGETCOMPRESSEDTEXIMAGEPROC)(GLenum target, GLint level,
+                                               GLvoid *img);
+typedef GLenum (*PFNGLCHECKFRAMEBUFFERSTATUSEXTPROC)(GLenum target);
+typedef void (*PFNGLBINDRENDERBUFFEREXTPROC)(GLenum target,
+                                             GLuint renderbuffer);
+typedef void (*PFNGLBUFFERDATAPROC)(GLenum target, GLsizeiptr size,
+                                    const GLvoid *data, GLenum usage);
+typedef void (*PFNGLGENFRAMEBUFFERSEXTPROC)(GLsizei n, GLuint *framebuffers);
+typedef void (*PFNGLGENRENDERBUFFERSEXTPROC)(GLsizei n, GLuint *renderbuffers);
+typedef void (*PFNGLFRAMEBUFFERTEXTURE2DEXTPROC)(GLenum target,
+                                                 GLenum attachment,
+                                                 GLenum textarget,
+                                                 GLuint texture, GLint level);
+typedef void (*PFNGLCOMPRESSEDTEXIMAGE2DPROC)(GLenum target, GLint level,
+                                              GLenum internalformat,
+                                              GLsizei width, GLsizei height,
+                                              GLint border, GLsizei imageSize,
+                                              const GLvoid *data);
+typedef void (*PFNGLFRAMEBUFFERRENDERBUFFEREXTPROC)(GLenum target,
+                                                    GLenum attachment,
+                                                    GLenum renderbuffertarget,
+                                                    GLuint renderbuffer);
+typedef void (*PFNGLRENDERBUFFERSTORAGEEXTPROC)(GLenum target,
+                                                GLenum internalformat,
+                                                GLsizei width, GLsizei height);
+typedef void (*PFNGLBINDFRAMEBUFFEREXTPROC)(GLenum target, GLuint framebuffer);
+#endif
+
+#define INVALID_COORD (-2147483647 - 1)
+
+//    wxWindows Hash Map Declarations
+#include <wx/hashmap.h>
+class RuleHash;
+
+WX_DECLARE_HASH_MAP(wxString, Rule *, wxStringHash, wxStringEqual, RuleHash);
+
+WX_DEFINE_SORTED_ARRAY(LUPrec *, wxArrayOfLUPrec);
+
+WX_DECLARE_LIST(S52_TextC, TextObjList);
+
+struct CARC_Buffer {
+  unsigned char color[3][4];
+  float line_width[3];
+  int steps;
+
+  int size;
+  float *data;
+};
+WX_DECLARE_STRING_HASH_MAP(CARC_Buffer, CARC_Hash);
+WX_DECLARE_STRING_HASH_MAP(int, CARC_DL_Hash);
+
+struct SoundingSym {
+  Rule *prule;
+  wxPoint2DDouble r;
+  wxUint32 color_RGB;
+};
+
+class PixelCache;
+
+class RenderFromHPGL;
+class TexFont;
+class wxFileConfig;
+
+class noshow_element {
+public:
+  char obj[7];
+};
+
+WX_DECLARE_OBJARRAY(noshow_element, ArrayOfNoshow);
+
+//-----------------------------------------------------------------------------
+//      LUP Array container, and friends
+//-----------------------------------------------------------------------------
+typedef struct _LUPHashIndex {
+  int n_start;
+  int count;
+} LUPHashIndex;
+
+WX_DECLARE_STRING_HASH_MAP(LUPHashIndex *, LUPArrayIndexHash);
+
+class s52plib;             // Forward
+extern s52plib *ps52plib;  ///< Global instance
+
+/** in s52cnsy */
+extern bool GetDoubleAttr(S57Obj *obj, const char *AttrName, double &val);
+
+class LUPArrayContainer {
+public:
+  LUPArrayContainer();
+  ~LUPArrayContainer();
+
+  wxArrayOfLUPrec *GetLUPArray(void) { return LUPArray; }
+  LUPHashIndex *GetArrayIndexHelper(const char *objectName);
+
+private:
+  wxArrayOfLUPrec *LUPArray;  // Sorted Array
+  LUPArrayIndexHash IndexHash;
+};
+
+class VPointCompat {
+public:
+  int pix_width;
+  int pix_height;
+  double view_scale_ppm;
+  double rotation;
+  double clat;
+  double clon;
+  double chart_scale;
+  wxRect rv_rect;
+  double ref_scale;
+  double display_scale;
+};
+
+typedef struct {
+  TexFont *cache;
+  wxFont *key;
+} TexFontCache;
+
+void toSM_plib(double lat, double lon, double lat0, double lon0, double *x,
+               double *y);
+
+void fromSM_plib(double x, double y, double lat0, double lon0, double *lat,
+                 double *lon);
+//-----------------------------------------------------------------------------
+//    s52plib definition
+//-----------------------------------------------------------------------------
+class s52plib {
+public:
+  s52plib(const wxString &PLib, bool b_forceLegacy = false);
+  ~s52plib();
+
+  // TODO: SetPPM, SetDisplayWidth etc. should be combined to be set together by
+  // pointing them to info about current monitor
+  /**
+   * Set pixels per millimeter for symbol rendering.
+   * @param ppmm Logical pixels per millimeter of display.
+   */
+  void SetPPMM(float ppmm);
+  void SetDisplayWidth(size_t pixels) { m_display_width = pixels; }
+  float GetPPMM() { return canvas_pix_per_mm; }
+  void SetDIPFactor(double factor);
+  void SetContentScaleFactor(double factor);
+
+  void SetOCPNVersion(int major, int minor, int patch);
+
+  double GetRVScaleFactor() { return m_rv_scale_factor; }
+
+  LUPrec *S52_LUPLookup(LUPname LUP_name, const char *objectName, S57Obj *pObj,
+                        bool bStrict = 0);
+  int _LUP2rules(LUPrec *LUP, S57Obj *pObj);
+  S52color *getColor(const char *colorName);
+  wxColour getwxColour(const wxString &colorName);
+
+  void UpdateMarinerParams(void);
+  void ClearCNSYLUPArray(void);
+
+  void GenerateStateHash();
+  long GetStateHash() { return m_state_hash; }
+
+  void SetPLIBColorScheme(wxString scheme, const ChartCtx &ctx);
+  void SetPLIBColorScheme(ColorScheme cs, const ChartCtx &ctx);
+  wxString GetPLIBColorScheme(void) { return m_ColorScheme; }
+
+  void SetGLRendererString(const wxString &renderer);
+  wxString GetGLRendererString() { return m_renderer_string; }
+  void SetGLOptions(bool b_useStencil, bool b_useStencilAP, bool b_useScissors,
+                    bool b_useFBO, bool b_useVBO, int nTextureFormat,
+                    float MinCartographicLineWidth, float MinSymbolLineWidth);
+  void SetUseGLSL(bool useGLSL) { m_useGLSL = useGLSL; }
+
+  bool ObjectRenderCheck(ObjRazRules *rzRules);
+  bool ObjectRenderCheckRules(ObjRazRules *rzRules, bool check_noshow = false);
+  bool ObjectRenderCheckPos(ObjRazRules *rzRules);
+  bool ObjectRenderCheckPosReduced(ObjRazRules *rzRules);
+  bool ObjectRenderCheckCat(ObjRazRules *rzRules);
+  bool ObjectRenderCheckCS(ObjRazRules *rzRules);
+  bool ObjectRenderCheckDates(ObjRazRules *rzRules);
+
+  static void DestroyLUP(LUPrec *pLUP);
+  static void ClearRulesCache(Rule *pR);
+  DisCat findLUPDisCat(const char *objectName, LUPname TNAM);
+
+  //    Temporarily save/restore the current colortable index
+  //    Useful for Thumbnail rendering
+  void SaveColorScheme(void) { m_colortable_index_save = m_colortable_index; }
+  void RestoreColorScheme(void) {}
+
+  //    Rendering stuff
+  void PrepareForRender(VPointCompat *vp);
+  void PrepareForRender(void);
+  void AdjustTextList(int dx, int dy, int screenw, int screenh);
+  void ClearTextList(void);
+  int SetLineFeaturePriority(ObjRazRules *rzRules, int npriority);
+  void FlushSymbolCaches(const ChartCtx &ctx);
+
+  //    For DC's
+  int RenderObjectToDC(wxDC *pdc, ObjRazRules *rzRules);
+  int RenderObjectToDCText(wxDC *pdc, ObjRazRules *rzRules);
+  int RenderAreaToDC(wxDC *pdc, ObjRazRules *rzRules,
+                     render_canvas_parms *pb_spec);
+
+  // Accessors
+  bool GetShowSoundings() { return m_bShowSoundg; }
+  void SetShowSoundings(bool f) {
+    m_bShowSoundg = f;
+    GenerateStateHash();
+  }
+
+  bool GetShowS57Text() { return m_bShowS57Text; }
+  void SetShowS57Text(bool f) {
+    m_bShowS57Text = f;
+    GenerateStateHash();
+  }
+
+  bool GetShowS57ImportantTextOnly() { return m_bShowS57ImportantTextOnly; }
+  void SetShowS57ImportantTextOnly(bool f) {
+    m_bShowS57ImportantTextOnly = f;
+    GenerateStateHash();
+  }
+
+  void SetLightsOff(bool val) { m_lightsOff = val; }
+  bool GetLightsOff() { return m_lightsOff; }
+
+  void SetAnchorOn(bool val);
+  bool GetAnchorOn();
+
+  void SetQualityOfData(bool val);
+  bool GetQualityOfData();
+
+  void SetScaleFactorExp(double ChartScaleFactorExp);
+  void SetScaleFactorZoomMod(int chart_zoom_modifier_vector);
+
+  int GetMajorVersion(void) { return m_VersionMajor; }
+  int GetMinorVersion(void) { return m_VersionMinor; }
+
+  void SetTextOverlapAvoid(bool f) { m_bDeClutterText = f; }
+  void SetShowNationalText(bool f) { m_bShowNationalTexts = f; }
+  void SetShowAtonText(bool f) { m_bShowAtonText = f; }
+  void SetShowLdisText(bool f) { m_bShowLdisText = f; }
+  void SetExtendLightSectors(bool f) { m_bExtendLightSectors = f; }
+
+  void SetDisplayCategory(enum _DisCat cat);
+  DisCat GetDisplayCategory() { return m_nDisplayCategory; }
+
+  void SetGLPolygonSmoothing(bool bset) { m_GLPolygonSmoothing = bset; }
+  bool GetGLPolygonSmoothing() { return m_GLPolygonSmoothing; }
+  void SetGLLineSmoothing(bool bset) { m_GLLineSmoothing = bset; }
+  bool GetGLLineSmoothing() { return m_GLLineSmoothing; }
+
+  wxArrayOfLUPrec *SelectLUPARRAY(LUPname TNAM);
+  LUPArrayContainer *SelectLUPArrayContainer(LUPname TNAM);
+
+  void DestroyPatternRuleNode(Rule *pR);
+  void DestroyRuleNode(Rule *pR);
+  static void DestroyRulesChain(Rules *top);
+
+  //    For OpenGL
+  int RenderObjectToGL(const wxGLContext &glcc, ObjRazRules *rzRules);
+  int RenderAreaToGL(const wxGLContext &glcc, ObjRazRules *rzRules);
+  int RenderObjectToGLText(const wxGLContext &glcc, ObjRazRules *rzRules);
+
+  bool EnableGLLS(bool benable);
+
+  bool IsObjNoshow(const char *objcl);
+  void AddObjNoshow(const char *objcl);
+  void RemoveObjNoshow(const char *objcl);
+  void ClearNoshow(void);
+  void SaveObjNoshow() { m_saved_noshow = m_noshow_array; };
+  void RestoreObjNoshow() { m_noshow_array = m_saved_noshow; };
+
+  void SetVPointCompat(int pix_width, int pix_height, double view_scale_ppm,
+                       double rotation, double clat, double clon,
+                       double chart_scale, wxRect rv_rect, LLBBox &bbox,
+                       double ref_scale, double display_scale);
+
+  // Todo accessors
+  LUPname m_nSymbolStyle;
+  LUPname m_nBoundaryStyle;
+  bool m_bOK;
+
+  bool m_bShowSoundg;
+  bool m_bShowMeta;
+  bool m_bShowS57Text;
+  bool m_bUseSCAMIN;
+  bool m_bUseSUPER_SCAMIN;
+  bool m_bShowAtonText;
+  bool m_bShowLdisText;
+  bool m_bExtendLightSectors;
+  bool m_bShowS57ImportantTextOnly;
+  bool m_bDeClutterText;
+  bool m_bShowNationalTexts;
+  int m_nSoundingFactor;
+  double m_SoundingsScaleFactor;
+  int m_nTextFactor;
+  double m_TextScaleFactor;
+  int m_SoundingsPointSize;
+  double m_SoundingsFontSizeMM;
+  double m_soundFontDelta;
+  double m_ChartScaleFactorExp;
+  int m_chart_zoom_modifier_vector;
+  double m_dipfactor;
+  double m_ContentScaleFactor;
+  double m_FinalTextScaleFactor;
+
+  int m_VersionMajor;
+  int m_VersionMinor;
+
+  int m_nDepthUnitDisplay;
+  bool m_isSoundingFontSet;
+  int m_sounding_char_width;
+  int m_sounding_char_height;
+  int m_sounding_char_descent;
+#ifdef ocpnUSE_GL
+  GLint m_sounding_shader_uni_color;
+  GLint m_sounding_shader_uni_uTex;
+  GLint m_sounding_shader_attr_position;
+  GLint m_sounding_shader_attr_aUV;
+  GLint m_sounding_shader_uni_transform;
+#endif
+  // Preferred display unit for vertical heights (meters/feet).
+  // 0 = meters, 1 = feet
+  int m_nHeightUnitDisplay;
+
+  //    Library data
+  wxArrayPtrVoid *pAlloc;
+
+  RuleHash *_line_sym;   // line symbolisation rules
+  RuleHash *_patt_sym;   // pattern symbolisation rules
+  RuleHash *_cond_sym;   // conditional symbolisation rules
+  RuleHash *_symb_symR;  // symbol symbolisation rules, Raster
+
+  LUPArrayContainer *line_LAC;
+  LUPArrayContainer *areaPlain_LAC;
+  LUPArrayContainer *areaSymbol_LAC;
+  LUPArrayContainer *pointSimple_LAC;
+  LUPArrayContainer *pointPaper_LAC;
+
+  wxArrayOfLUPrec *condSymbolLUPArray;  // Dynamic Conditional Symbology
+
+  wxArrayPtrVoid *pOBJLArray;  // Used for Display Filtering
+  std::vector<wxString> OBJLDescriptions;
+
+  RuleHash *_symb_sym;  // symbol symbolisation rules
+  std::unordered_map<int, std::string> m_natsur_hash;
+  // hash table for cacheing NATSUR string values
+  // from int attributes
+
+  int m_myConfig;
+
+  double lastLightLat;
+  double lastLightLon;
+  float m_GLMinCartographicLineWidth;
+  float m_GLMinSymbolLineWidth;
+
+  ChartSymbols m_chartSymbols;
+
+  void PLIB_LoadS57GlobalConfig(wxFileConfig *pconfig);
+  void PLIB_LoadS57ObjectConfig(wxFileConfig *pconfig);
+  void SetReducedBBox(LLBBox box) { reducedBBox = box; }
+
+  void RenderTex(char *str, char *col, wxPoint &r, wxPoint &pivot,
+                 wxPoint origin, float scale, double rot_angle, float sym_len,
+                 float sym_height, float seg_len);
+  int BuildLCSymbolTexture(char *str, char *col, wxPoint &r, wxPoint &pivot,
+                           wxPoint origin, float scale, float sym_len,
+                           float sym_height);
+
+private:
+  int S52_load_Plib(const wxString &PLib, bool b_forceLegacy);
+  bool S52_flush_Plib();
+
+  void PLIB_LoadS57Config();
+
+  void InitializeNatsurHash();
+  bool PreloadOBJLFromCSV(const wxString &csv_file);
+
+  int DoRenderObject(wxDC *pdcin, ObjRazRules *rzRules);
+  int DoRenderObjectTextOnly(wxDC *pdcin, ObjRazRules *rzRules);
+
+  //    Area Renderers
+  int RenderToBufferAC(ObjRazRules *rzRules, Rules *rules,
+                       render_canvas_parms *pb_spec);
+  int RenderToBufferAP(ObjRazRules *rzRules, Rules *rules,
+                       render_canvas_parms *pb_spec);
+
+  int RenderToGLAC(ObjRazRules *rzRules, Rules *rules);
+  int RenderToGLAC_GLSL(ObjRazRules *rzRules, Rules *rules);
+
+  int RenderToGLAP(ObjRazRules *rzRules, Rules *rules);
+  int RenderToGLAP_GLSL(ObjRazRules *rzRules, Rules *rules);
+
+  //    Object Renderers
+  int RenderTX(ObjRazRules *rzRules, Rules *rules);
+  int RenderTE(ObjRazRules *rzRules, Rules *rules);
+  int RenderSY(ObjRazRules *rzRules, Rules *rules);
+  int RenderLS(ObjRazRules *rzRules, Rules *rules);
+  int RenderLC(ObjRazRules *rzRules, Rules *rules);
+  int RenderMPS(ObjRazRules *rzRules, Rules *rules);
+  void RenderMPSArray(ObjRazRules *rzRules, std::vector<SoundingSym> array);
+  int RenderCARC(ObjRazRules *rzRules, Rules *rules);
+  char *RenderCS(ObjRazRules *rzRules, Rules *rules);
+  int RenderGLLS(ObjRazRules *rzRules, Rules *rules);
+  int RenderGLLC(ObjRazRules *rzRules, Rules *rules);
+
+  int RenderCARC_VBO(ObjRazRules *rzRules, Rules *rules);
+  int RenderCARC_GLSL(ObjRazRules *rzRules, Rules *rules);
+
+  void UpdateOBJLArray(S57Obj *obj);
+
+  int reduceLOD(double LOD_meters, int nPoints, double *source,
+                wxPoint2DDouble **dest, int *maskIn, int **maskOut);
+  int ComputeWinding(ObjRazRules *rzRules, Rules *rules);
+
+  int RenderLSLegacy(ObjRazRules *rzRules, Rules *rules);
+  int RenderLCLegacy(ObjRazRules *rzRules, Rules *rules);
+  int RenderGLLSLegacy(ObjRazRules *rzRules, Rules *rules);
+  int RenderGLLCLegacy(ObjRazRules *rzRules, Rules *rules);
+  int RenderLSPlugIn(ObjRazRules *rzRules, Rules *rules);
+  int RenderLCPlugIn(ObjRazRules *rzRules, Rules *rules);
+  int RenderLCTexture(ObjRazRules *rzRules, Rules *rules);
+
+  int RenderLS_Dash_GLSL(ObjRazRules *rzRules, Rules *rules);
+
+  void DrawDashLine(wxPen &pen, double x1, double y1, double x2, double y2);
+
+  render_canvas_parms *CreatePatternBufferSpec(ObjRazRules *rzRules,
+                                               Rules *rules, bool b_revrgb,
+                                               bool b_pot = false);
+
+  void RenderToBufferFilledPolygon(ObjRazRules *rzRules, S57Obj *obj,
+                                   S52color *c, render_canvas_parms *pb_spec,
+                                   render_canvas_parms *patt_spec);
+
+  void draw_lc_poly_texture(wxDC *pdc, wxColor &color, int width, wxPoint2DDouble *ptp,
+                            int *mask, int npt, float sym_len, float sym_height,
+                            float sym_factor, Rule *draw_rule, bool winding_cw);
+  void draw_lc_poly(wxDC *pdc, wxColor &color, int width, wxPoint *ptp,
+                    int *mask, int npt, float sym_len, float sym_height,
+                    float sym_factor, Rule *draw_rule);
+
+  bool RenderHPGL(ObjRazRules *rzRules, Rule *rule_in, wxPoint2DDouble &r,
+                  float rot_angle = 0., double uScale = 1.0);
+  bool RenderRasterSymbol(ObjRazRules *rzRules, Rule *prule, wxPoint2DDouble &r,
+                          float rot_angle = 0.);
+  bool RenderCachedVectorSymbol(ObjRazRules *rzRules, Rule *rule_in, wxPoint2DDouble &r,
+                                float rot_angle, double uScale);
+  int BuildHPGLTexture(ObjRazRules *rzRules, Rule *rule_in, wxPoint2DDouble &r,
+                       float rot_angle, double uScale);
+
+  void SetupSoundingFont();
+  bool RenderSoundingSymbol(ObjRazRules *rzRules, Rule *prule, wxPoint &r,
+                            wxColor symColor, float rot_angle = 0.);
+  wxImage RuleXBMToImage(Rule *prule);
+
+  bool RenderText(wxDC *pdc, S52_TextC *ptext, double x, double y, wxRect2D *pRectDrawn,
+                  S57Obj *pobj, bool bCheckOverlap);
+
+  bool CheckTextRectList(const wxRect2D &test_rect, S52_TextC *ptext);
+  int RenderT_All(ObjRazRules *rzRules, Rules *rules, bool bTX);
+
+  int PrioritizeLineFeature(ObjRazRules *rzRules, int npriority);
+
+  int dda_tri(wxPoint *ptp, S52color *c, render_canvas_parms *pb_spec,
+              render_canvas_parms *pPatt_spec);
+  int dda_trap(wxPoint *segs, int lseg, int rseg, int ytop, int ybot,
+               S52color *c, render_canvas_parms *pb_spec,
+               render_canvas_parms *pPatt_spec);
+
+  LUPrec *FindBestLUP(wxArrayOfLUPrec *LUPArray, unsigned int startIndex,
+                      unsigned int count, S57Obj *pObj, bool bStrict);
+
+  void SetGLClipRect(const VPointCompat &vp, const wxRect &rect);
+
+  char *_getParamVal(ObjRazRules *rzRules, char *str, char *buf, int bsz);
+  S52_TextC *S52_PL_parseTX(ObjRazRules *rzRules, Rules *rules, char *cmd);
+  char *_parseTEXT(ObjRazRules *rzRules, S52_TextC *text, char *str0);
+  S52_TextC *S52_PL_parseTE(ObjRazRules *rzRules, Rules *rules, char *cmd);
+
+  Rules *StringToRules(const wxString &str_in);
+  void GetAndAddCSRules(ObjRazRules *rzRules, Rules *rules);
+
+  void DestroyPattRules(RuleHash *rh);
+  void DestroyRules(RuleHash *rh);
+  void DestroyLUPArray(wxArrayOfLUPrec *pLUPArray);
+
+  bool TextRenderCheck(ObjRazRules *rzRules);
+  bool inter_tri_rect(wxPoint *ptp, render_canvas_parms *pb_spec);
+
+  bool GetPointPixArray(ObjRazRules *rzRules, wxPoint2DDouble *pd, wxPoint *pp,
+                        int nv);
+  bool GetPointPixSingle(ObjRazRules *rzRules, float north, float east,
+                         wxPoint *r);
+  void GetPixPointSingle(int pixx, int pixy, double *plat, double *plon);
+  void GetPixPointSingleNoRotate(int pixx, int pixy, double *plat,
+                                 double *plon);
+  bool GetDoublePointPixSingle(ObjRazRules *rzRules, float north, float east,
+                                        wxPoint2DDouble *r);
+  bool GetDoublePointPixArray(ObjRazRules *rzRules, wxPoint2DDouble *pd, wxPoint2DDouble *pp,
+                        int nv);
+
+  void GetLLFromPix(const wxPoint2DDouble &p, double *lat, double *lon);
+  wxPoint GetPixFromLL(double lat, double lon);
+  wxPoint GetPixFromLLROT(double lat, double lon, double rotation);
+  wxPoint2DDouble GetDoublePixFromLL(double lat, double lon);
+  wxPoint2DDouble GetDoublePixFromLLROT(double lat, double lon,
+                                        double rotation);
+
+  LLBBox &GetBBox() { return BBox; }
+  LLBBox GetReducedBBox() { return reducedBBox; }
+
+  wxString m_plib_file;
+
+  /**
+   * The number of pixels per millimeter of the canvas.
+   *
+   * @note Set by parent, used to scale symbols/lines/patterns.
+   */
+  float canvas_pix_per_mm;
+  double m_rv_scale_factor;
+  float m_display_size_mm;
+  size_t m_display_width;
+
+  S52color m_unused_color;
+  wxColor m_unused_wxColor;
+
+  bool bUseRasterSym;
+
+  wxDC *m_pdc;  // The current DC
+
+  // #ifdef ocpnUSE_GL
+  wxGLContext *m_glcc;
+  // #endif
+
+  int *ledge;
+  int *redge;
+
+  int m_colortable_index;
+  int m_colortable_index_save;
+
+  TextObjList m_textObjList;
+
+  wxString m_ColorScheme;
+
+  bool m_lightsOff;
+  bool m_anchorOn;
+  bool m_qualityOfDataOn;
+
+  long m_state_hash;
+
+  bool m_txf_ready;
+  int m_txf_avg_char_width;
+  int m_txf_avg_char_height;
+  CARC_Hash m_CARC_hashmap;
+  CARC_DL_Hash m_CARC_DL_hashmap;
+  RenderFromHPGL *HPGL;
+
+  TexFont *m_txf;
+  DepthFont m_texSoundings;
+  bool m_benableGLLS;
+  DisCat m_nDisplayCategory;
+  ArrayOfNoshow m_noshow_array;
+  ArrayOfNoshow m_saved_noshow;
+
+  int m_coreVersionMajor;
+  int m_coreVersionMinor;
+  int m_coreVersionPatch;
+
+  // GL Options, set by core depending on hardware capability
+  bool m_useStencil;
+  bool m_useStencilAP;
+  bool m_useScissors;
+  bool m_useFBO;
+  bool m_useVBO;
+  bool m_GLAC_VBO;
+  int m_TextureFormat;
+  bool m_GLLineSmoothing;
+  bool m_GLPolygonSmoothing;
+  wxFont *m_soundFont;
+  bool m_useGLSL;
+
+  double m_displayScale;
+
+  VPointCompat vp_plib;
+  LLBBox BBox;
+#define TXF_CACHE 8
+  TexFontCache s_txf[TXF_CACHE];
+  wxString m_renderer_string;
+  wxFont *ChartTextDefaultFont;
+
+  LLBBox reducedBBox;
+  std::unordered_map<std::string, int> vector_symbol_cache;
+  std::unordered_map<std::string, int> lc_vector_symbol_cache;
+};
+
+#define HPGL_FILLED true
+
+class RenderFromHPGL {
+public:
+  RenderFromHPGL(s52plib *plibarg);
+  ~RenderFromHPGL();
+
+  void SetTargetDC(wxDC *pdc);
+  void SetTargetOpenGl();
+#if wxUSE_GRAPHICS_CONTEXT
+  void SetTargetGCDC(wxGCDC *gdc);
+#endif
+  void SetVP(VPointCompat *pVP) { m_vp = pVP; }
+  void SetContentScaleFactor(double factor) { m_content_scale_factor = factor; }
+  bool Render(char *str, char *col, wxPoint2DDouble &r, wxPoint &pivot, wxPoint origin,
+              float scale, double rot_angle, bool bSymbol);
+  wxBrush *getBrush() { return brush; }
+
+  GLUtesselator *m_tobj;
+  int s_odc_tess_vertex_idx;
+  int s_odc_tess_vertex_idx_this;
+  int s_odc_tess_buf_len;
+  GLenum s_odc_tess_mode;
+  int s_odc_nvertex;
+  GLfloat *s_odc_tess_work_buf;
+
+private:
+  const char *findColorNameInRef(char colorCode, char *col);
+  void RotatePoint(wxPoint2DDouble &point, wxPoint origin, double angle);
+  wxPoint ParsePoint(wxString &argument);
+  void SetPen();
+  void Line(wxPoint2DDouble from, wxPoint2DDouble to);
+  void Circle(wxPoint2DDouble center, int radius, bool filled = false);
+  void Polygon();
+
+  void DrawPolygonTessellated(int n, wxPoint points[], wxCoord xoffset,
+                              wxCoord yoffset);
+  void DrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,
+                   float scale, float angle);
+
+  s52plib *plib;
+  double scaleFactor;
+
+  wxDC *targetDC;
+#if wxUSE_GRAPHICS_CONTEXT
+  wxGCDC *targetGCDC;
+#endif
+
+  wxColor penColor;
+  wxPen *pen;
+  wxColor brushColor;
+  wxBrush *brush;
+  long penWidth;
+  int transparency;
+  double m_content_scale_factor;
+
+  int noPoints;
+  wxPoint polygon[100];
+
+  float m_currentColor[4];
+
+  bool renderToDC;
+  bool renderToOpenGl;
+  bool renderToGCDC;
+  VPointCompat *m_vp;
+
+  float *workBuf;
+  size_t workBufSize;
+  unsigned int workBufIndex;
+};
+
+#endif  //_S52PLIB_H_

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/s52plibGL.h

@@ -0,0 +1,56 @@
+/******************************************************************************
+ *
+ * Project:  OpenCPN
+ * Purpose:  Global Build Options
+ * Author:   David Register
+ *
+ ***************************************************************************
+ *   Copyright (C) 2010 by David S. Register   *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ ***************************************************************************
+ *
+ */
+
+//----------------------------------------------------------------------------------
+//          OpenGL Build options for S52PLIB
+//----------------------------------------------------------------------------------
+#ifndef _S52PLIBGL_H_
+#define _S52PLIBGL_H_
+
+//#include "config.h"
+
+#include <cmath>
+#include <algorithm>
+
+
+#if defined(__OCPN__ANDROID__)
+ #include <qopengl.h>
+ #include <GL/gl_private.h>  // this is a cut-down version of gl.h
+ #include <GLES2/gl2.h>
+#elif defined(__MSVC__)
+ #include "glew.h"
+#elif defined(__WXOSX__)
+ #include <OpenGL/gl.h>
+ #include <OpenGL/glu.h>
+ typedef void (*  _GLUfuncptr)();
+ #define GL_COMPRESSED_RGB_FXT1_3DFX       0x86B0
+#elif defined(__WXQT__) || defined(__WXGTK__)
+ #include <GL/glew.h>
+ #include <GL/glu.h>
+#endif
+
+#endif  // __FILE__

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/s52s57.h

@@ -0,0 +1,646 @@
+/******************************************************************************
+ *
+ * Project:  OpenCP
+ * Purpose:  S52 PLIB and S57 Chart data types
+ * Author:   David Register
+ *
+ ***************************************************************************
+ *   Copyright (C) 2010 by David S. Register   *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ ***************************************************************************
+ *
+ */
+
+#ifndef _S52S57_H_
+#define _S52S57_H_
+
+#include "bbox.h"
+#include "color_types.h"
+
+#include <unordered_map>
+#include <vector>
+#include <list>
+
+#define CURRENT_SENC_FORMAT_VERSION 201
+
+#define OBJL_NAME_LEN 6
+
+//    Fwd Defns
+class wxArrayOfS57attVal;
+class OGREnvelope;
+class OGRGeometry;
+class VE_Element;
+class VC_Element;
+
+class wxRect2D {
+public:
+  double x;
+  double y;
+  double width;
+  double height;
+
+  wxRect2D();
+  wxRect2D(double xx, double yy, double w, double h);
+  void SetX(double _x){ x = _x;}
+  void SetY(double _y){ y = _y;}
+  void SetWidth(double _width){ width = _width;}
+  void SetHeight(double _height){ height = _height;}
+
+  bool Intersects(const wxRect2D& other,
+                  double epsilon = 1e-6) const;
+  wxRect2D Union(const wxRect2D& other) const;
+  bool IsEmpty() const  {return width <= 0.0 || height <= 0.0;}
+
+};
+
+// name of the addressed look up table set (fifth letter)
+typedef enum _LUPname {
+  SIMPLIFIED = 'L',             // points
+  PAPER_CHART = 'R',            // points
+  LINES = 'S',                  // lines
+  PLAIN_BOUNDARIES = 'N',       // areas
+  SYMBOLIZED_BOUNDARIES = 'O',  // areas
+  LUPNAME_NUM = 5
+} LUPname;
+
+// Addressed Object Type
+typedef enum _Object_t {
+  POINT_T = 'P',
+  LINES_T = 'L',
+  AREAS_T = 'A',
+  OBJ_NUM = 3  // number of object type
+} Object_t;
+
+// Display Priority
+typedef enum _DisPrio {
+  PRIO_NODATA = '0',      // no data fill area pattern
+  PRIO_GROUP1 = '1',      // S57 group 1 filled areas
+  PRIO_AREA_1 = '2',      // superimposed areas
+  PRIO_AREA_2 = '3',      // superimposed areas also water features
+  PRIO_SYMB_POINT = '4',  // point symbol also land features
+  PRIO_SYMB_LINE = '5',   // line symbol also restricted areas
+  PRIO_SYMB_AREA = '6',   // area symbol also traffic areas
+  PRIO_ROUTEING = '7',    // routeing lines
+  PRIO_HAZARDS = '8',     // hazards
+  PRIO_MARINERS = '9',    // VRM, EBL, own ship
+  PRIO_NUM = 10           // number of priority levels
+
+} DisPrio;
+
+// RADAR Priority
+typedef enum _RadPrio {
+  RAD_OVER = 'O',  // presentation on top of RADAR
+  RAD_SUPP = 'S',  // presentation suppressed by RADAR
+  RAD_NUM = 2
+} RadPrio;
+
+//    PixelPtr type flags
+enum {
+  ID_EMPTY = 0,
+  ID_wxBitmap,
+  ID_RGBA,
+  ID_GL_PATT_SPEC,
+  ID_RGB_PATT_SPEC,
+  ID_GLIST
+
+};
+
+// display category type
+typedef enum _DisCat {
+  DISPLAYBASE = 'D',        //
+  STANDARD = 'S',           //
+  OTHER = 'O',              // O for OTHER
+  MARINERS_STANDARD = 'M',  // Mariner specified
+  MARINERS_OTHER,           // value not defined
+  DISP_CAT_NUM,             // value not defined
+} DisCat;
+
+#define MASK_POINT 1
+#define MASK_LINE 2
+#define MASK_AREA 4
+#define MASK_MPS 8
+#define MASK_ALL MASK_POINT + MASK_LINE + MASK_AREA + MASK_MPS
+
+typedef enum _Rules_t {
+  RUL_NONE,    // no rule type (init)
+  RUL_TXT_TX,  // TX
+  RUL_TXT_TE,  // TE
+  RUL_SYM_PT,  // SY
+  RUL_SIM_LN,  // LS
+  RUL_COM_LN,  // LC
+  RUL_ARE_CO,  // AC
+  RUL_ARE_PA,  // AP
+  RUL_CND_SY,  // CS
+  RUL_MUL_SG,  // Multipoint Sounding
+  RUL_ARC_2C   // Circular Arc, used for sector lights, opencpn private
+} Rules_t;
+
+//-- SYMBOLISATION MODULE STRUCTURE -----------------------------
+// position parameter:  LINE,       PATTERN, SYMBOL
+typedef struct _position {
+  union {
+    int dummy1, PAMI, dummy2;
+  } minDist;
+  union {
+    int dummy1, PAMA, dummy2;
+  } maxDist;
+  union {
+    int LICL, PACL, SYCL;
+  } pivot_x;
+  union {
+    int LIRW, PARW, SYRW;
+  } pivot_y;
+  union {
+    int LIHL, PAHL, SYHL;
+  } bnbox_w;
+  union {
+    int LIVL, PAVL, SYVL;
+  } bnbox_h;
+  union {
+    int LBXC, PBXC, SBXC;
+  } bnbox_x;  // UpLft crnr
+  union {
+    int LBXR, PBXR, SBXR;
+  } bnbox_y;  // UpLft crnr
+} position;
+
+// rule parameter for : LINE,       PATTERN,    SYMBOL
+typedef struct _Rule {
+  int RCID;
+  union {
+    char LINM[8], PANM[8], SYNM[8];
+  } name;
+  union {
+    char dummy, PADF, SYDF;
+  } definition;
+  union {
+    char dummy1, PATP, dummy2;
+  } fillType;
+  union {
+    char dummy1, PASP, dummy2;
+  } spacing;
+  union {
+    position line, patt, symb;
+  } pos;
+  union {
+    wxString *LXPO, *PXPO, *SXPO;
+  } exposition;
+  union {
+    wxString *dummy, *PBTM, *SBTM;
+  } bitmap;
+  union {
+    char *LCRF, *PCRF, *SCRF;
+  } colRef;
+  union {
+    char *LVCT, *PVCT, *SVCT;
+  } vector;
+
+  // Private data
+  int parm0;  // always indicates form of pixelPtr
+  int parm1;  // integer parameters
+  int parm2;
+  int parm3;
+  int parm4;
+  int parm5;
+  int parm6;
+  int parm7;
+  void *pixelPtr;  // opaque pointer
+
+} Rule;
+
+typedef struct _Rules {
+  Rules_t ruleType;
+  char *INSTstr;   // Symbology Instruction string
+  Rule *razRule;   // rule
+  char *INST0;     // Head of the entire object Instruction string
+  int n_sequence;  // sequence number in list, used to identify a particular
+                   // rule
+  bool b_private_razRule;  // marker indicating that razRule should be free'd on
+                           // Rules destroy
+  struct _Rules *next;
+} Rules;
+
+// LOOKUP MODULE CLASS
+
+class LUPrec {
+public:
+  ~LUPrec() { ATTArray.clear(); };
+  int RCID;                           // record identifier
+  char OBCL[7];                       // Name (6 char) '\0' terminated
+  Object_t FTYP;                      // 'A' Area, 'L' Line, 'P' Point
+  DisPrio DPRI;                       // Display Priority
+  RadPrio RPRI;                       // 'O' or 'S', Radar Priority
+  LUPname TNAM;                       // FTYP:  areas, points, lines
+  std::vector<std::string> ATTArray;  // Array of LUP Attributes
+  wxString INST;                      // Instruction Field (rules)
+  DisCat DISC;      // Display Categorie: D/S/O, DisplayBase, Standard, Other
+  int LUCM;         // Look-Up Comment (PLib3.x put 'groupes' here,
+                    // hence 'int', but its a string in the specs)
+  int nSequence;    // A sequence number, indicating order of encounter in
+                    //  the PLIB file
+  Rules *ruleList;  // rasterization rule list
+};
+
+// Conditional Symbology
+typedef struct _Cond {
+  const char *name;
+  void *(*condInst)(void *param);
+} Cond;
+
+class S52_TextC {
+public:
+  S52_TextC();
+  ~S52_TextC();
+
+  wxString frmtd;  // formated text string
+  char hjust;
+  char vjust;
+  char space;
+  char style;      // CHARS
+  char weight;     // CHARS
+  char width;      // CHARS
+  int bsize;       // CHARS -body size
+  int xoffs;       // text offsets, in units of bsize
+  int yoffs;       //
+  S52color *pcol;  // pointer to S52colour
+  int dis;         // display
+  wxFont *pFont;
+  int rul_seq_creator;  // sequence number of the Rule creating this object
+  int RGBA_width;
+  int RGBA_height;
+  int rendered_char_height;
+  wxRect2D
+      rText;  // rectangle of the text as currently rendered, used for declutter
+  bool bnat;  // frmtd is National text, UTF-8 encoded
+  bool bspecial_char;  // frmtd has special ASCII characters, i.e. > 127
+  int avgCharWidth;
+  int texobj;
+  int text_width;
+  int text_height;
+};
+
+//
+// WARNING: must be in sync OGRatt_t
+
+typedef enum _OGRatt_t {
+  OGR_INT,
+  OGR_INT_LST,
+  OGR_REAL,
+  OGR_REAL_LST,
+  OGR_STR,
+} OGRatt_t;
+
+typedef struct _S57attVal {
+  void *value;
+  OGRatt_t valType;
+} S57attVal;
+
+WX_DEFINE_ARRAY(S57attVal *, wxArrayOfS57attVal);
+
+typedef struct _OBJLElement {
+  char OBJLName[OBJL_NAME_LEN];
+  int nViz;
+} OBJLElement;
+
+// OGR primitive type
+typedef enum _geoPrim_t {
+  GEO_POINT,
+  GEO_LINE,
+  GEO_AREA,
+  GEO_META,
+  GEO_PRIM,  // number of primitive
+} GeoPrim_t;
+
+typedef struct _pt {
+  double x;
+  double y;
+} pt;
+
+//      Fwd References
+class s57chart;
+class S57Obj;
+class OGRFeature;
+class PolyTessGeo;
+class line_segment_element;
+class PI_line_segment_element;
+
+struct chart_context {
+  std::unordered_map<unsigned, VC_Element *> *m_pvc_hash;
+  std::unordered_map<unsigned, VE_Element *> *m_pve_hash;
+  double ref_lat;
+  double ref_lon;
+  wxArrayPtrVoid *pFloatingATONArray;
+  wxArrayPtrVoid *pRigidATONArray;
+  void *chart;
+  double safety_contour;
+  float *vertex_buffer;
+  int vboID;
+  int chart_type;
+  int chart_scale;
+  std::list<S57Obj *> *(s57chart::*pt2GetAssociatedObjects)(S57Obj *obj);
+};
+
+class LineGeometryDescriptor {
+public:
+  double extent_s_lat;
+  double extent_n_lat;
+  double extent_w_lon;
+  double extent_e_lon;
+  int indexCount;
+  int *indexTable;
+};
+
+typedef struct _MultipointGeometryDescriptor {
+  double extent_s_lat;
+  double extent_n_lat;
+  double extent_w_lon;
+  double extent_e_lon;
+  int pointCount;
+  void *pointTable;
+} MultipointGeometryDescriptor;
+
+class S57Obj {
+public:
+  //  Public Methods
+  S57Obj();
+  ~S57Obj();
+
+  S57Obj(const char *featureName);
+
+  wxString GetAttrValueAsString(const char *attr);
+  int GetAttributeIndex(const char *AttrSeek);
+
+  bool AddIntegerAttribute(const char *acronym, int val);
+  bool AddIntegerListAttribute(const char *acronym, int *pval, int nValue);
+  bool AddDoubleAttribute(const char *acronym, double val);
+  bool AddDoubleListAttribute(const char *acronym, double *pval, int nValue);
+  bool AddStringAttribute(const char *acronym, char *val);
+
+  bool SetPointGeometry(double lat, double lon, double ref_lat, double ref_lon);
+  bool SetLineGeometry(LineGeometryDescriptor *pGeo, GeoPrim_t geoType,
+                       double ref_lat, double ref_lon);
+  bool SetAreaGeometry(PolyTessGeo *ppg, double ref_lat, double ref_lon);
+  bool SetMultipointGeometry(MultipointGeometryDescriptor *pGeo, double ref_lat,
+                             double ref_lon);
+
+  // Private Methods
+private:
+  void Init();
+
+public:
+  // Instance Data
+  char FeatureName[8];
+  GeoPrim_t Primitive_type;
+
+  char *att_array;
+  wxArrayOfS57attVal *attVal;
+  int n_attr;
+
+  int iOBJL;
+  int Index;
+
+  double x;  // for POINT
+  double y;
+  double z;
+  int npt;  // number of points as needed by arrays
+
+  pt *geoPt;  // used for cm93 line feature select check
+
+  double *geoPtz;      // an array[3] for MultiPoint, SM with Z, i.e. depth
+  double *geoPtMulti;  // an array[2] for MultiPoint, lat/lon to make bbox
+                       // of decomposed points
+  PolyTessGeo *pPolyTessGeo;
+
+  LLBBox BBObj;  // lat/lon BBox of the rendered object
+  double m_lat;  // The lat/lon of the object's "reference" point
+  double m_lon;
+
+  Rules *CSrules;  // per object conditional symbology
+  int bCS_Added;
+
+  S52_TextC *FText;
+  int bFText_Added;
+  wxRect rText;
+
+  int Scamin;  // SCAMIN attribute decoded during load
+  int SuperScamin;
+  bool bIsClone;
+  int nRef;            // Reference counter, to signal OK for deletion
+  bool bIsAton;        // This object is an aid-to-navigation
+  bool bIsAssociable;  // This object is DRGARE or DEPARE
+
+  int m_n_lsindex;
+  int *m_lsindex_array;
+  int m_n_edge_max_points;
+  line_segment_element *m_ls_list;
+  PI_line_segment_element *m_ls_list_legacy;
+
+  DisCat m_DisplayCat;
+  int m_DPRI;                // display priority, assigned from initial LUP
+                             // May be adjusted by CS
+  bool m_bcategory_mutable;  //  CS procedure may move this object to a higher
+                             //  category. Used as a hint to rendering filter
+                             //  logic
+
+  // This transform converts from object geometry
+  // to SM coordinates.
+  double x_rate;    // These auxiliary transform coefficients are
+  double y_rate;    // to be used in GetPointPix() and friends
+  double x_origin;  // on a per-object basis if necessary
+  double y_origin;
+
+  chart_context *m_chart_context;  // per-chart constants, carried in each
+                                   // object for convenience
+  int auxParm0;  // some per-object auxiliary parameters, used for OpenGL
+  int auxParm1;
+  int auxParm2;
+  int auxParm3;
+
+  bool bBBObj_valid;
+  bool bOK_to_Render;
+};
+
+typedef std::vector<S57Obj *> S57ObjVector;
+
+typedef struct _sm_parms {
+  double easting_vp_center;
+  double northing_vp_center;
+} sm_parms;
+
+WX_DEFINE_ARRAY_PTR(Rules *, ArrayOfRules);
+
+typedef struct _mps_container {
+  ArrayOfRules *cs_rules;
+} mps_container;
+
+// object rasterization rules
+typedef struct _ObjRazRules {
+  LUPrec *LUP;
+  S57Obj *obj;
+  sm_parms *sm_transform_parms;
+  struct _ObjRazRules *child;  // child list, used only for MultiPoint Soundings
+  struct _ObjRazRules *next;
+  struct _mps_container *mps;
+} ObjRazRules;
+
+WX_DECLARE_LIST(ObjRazRules, ListOfObjRazRules);
+
+//----------------------------------------------------------------------------------
+//          Used for s52 Fast Polygon Renderer
+//----------------------------------------------------------------------------------
+class render_canvas_parms {
+public:
+  render_canvas_parms(void);
+  ~render_canvas_parms(void);
+
+  unsigned char *pix_buff;
+  int lclip;
+  int rclip;
+  int pb_pitch;
+  int x;
+  int y;
+  int width;
+  int height;
+  int w_pot;
+  int h_pot;
+  int depth;
+  bool b_stagger;
+  int OGL_tex_name;
+  bool b_revrgb;
+};
+
+//----------------------------------------------------------------------------------
+//          Classes used to create arrays of geometry elements
+//----------------------------------------------------------------------------------
+
+class VE_Element {
+public:
+  unsigned int index;
+  unsigned int nCount;
+  float *pPoints;
+  int max_priority;
+  size_t vbo_offset;
+  LLBBox edgeBBox;
+};
+
+class VC_Element {
+public:
+  unsigned int index;
+  float *pPoint;
+};
+
+typedef std::vector<VE_Element *> VE_ElementVector;
+typedef std::vector<VC_Element *> VC_ElementVector;
+
+typedef enum {
+  TYPE_CE = 0,
+  TYPE_CC,
+  TYPE_EC,
+  TYPE_EE,
+  TYPE_EE_REV
+} SegmentType;
+
+class connector_segment {
+public:
+  int vbo_offset;
+  int max_priority_cs;
+  float cs_lat_avg;  // segment centroid
+  float cs_lon_avg;
+};
+
+class line_segment_element {
+public:
+  int priority;
+  union {
+    connector_segment *pcs;
+    VE_Element *pedge;
+  };
+  SegmentType ls_type;
+
+  line_segment_element *next;
+};
+
+#if 0  // TODO
+class line_segment_element_legacy
+{
+public:
+    size_t              vbo_offset;
+    size_t              n_points;
+    int                 priority;
+    float               lat_max;                // segment bounding box
+    float               lat_min;
+    float               lon_max;
+    float               lon_min;
+    int                 type;
+    void                *private0;
+
+    line_segment_element *next;
+};
+
+
+class connector_segment
+{
+public:
+    void *start;
+    void *end;
+    SegmentType type;
+    int vbo_offset;
+    int max_priority;
+};
+
+#endif
+
+class connector_key {
+public:
+  connector_key() { memset(k, 0, sizeof k); }
+
+  connector_key(SegmentType t, int a, int b) { set(t, a, b); }
+
+  void set(SegmentType t, int a, int b) {
+    memcpy(k, &a, sizeof a);
+    memcpy(&k[sizeof a], &b, sizeof b);
+    k[sizeof(a) + sizeof(b)] = (unsigned char)t;
+  }
+
+  unsigned long hash() const;
+
+  unsigned char k[sizeof(int) + sizeof(int) + sizeof(char)];
+};
+
+class connHash {
+public:
+  connHash() {}
+  unsigned long operator()(const connector_key &k) const { return k.hash(); }
+
+  connHash &operator=(const connHash &) { return *this; }
+};
+
+// comparison operator
+class connEqual {
+public:
+  connEqual() {}
+  bool operator()(const connector_key &a, const connector_key &b) const {
+    return memcmp(a.k, b.k, sizeof b.k) == 0;
+  }
+
+  connEqual &operator=(const connEqual &) { return *this; }
+};
+
+WX_DECLARE_HASH_MAP(connector_key, connector_segment *, connHash, connEqual,
+                    connected_segment_hash);
+
+#endif

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/s52shaders.cpp

@@ -0,0 +1,756 @@
+/***************************************************************************
+ *
+ * Project:  OpenCPN
+ * Purpose:  S52 Presentation Library
+ * Authors:   David Register
+ *            Jesper Weissglas
+ *
+ ***************************************************************************
+ *   Copyright (C) 2010 by David S. Register                               *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ **************************************************************************/
+
+
+#if defined(USE_ANDROID_GLES2) || defined(ocpnUSE_GLSL)
+
+#include "s52shaders.h"
+
+#ifdef USE_ANDROID_GLES2
+const GLchar* S52_preamble =
+"\n";
+#else
+const GLchar* S52_preamble =
+"#version 120\n"
+"#define precision\n"
+"#define lowp\n"
+"#define mediump\n"
+"#define highp\n";
+#endif
+
+
+// Simple colored triangle shader
+
+static const GLchar *S52color_tri_vertex_shader_source =
+    "attribute vec2 position;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+    "uniform vec4 color;\n"
+    "varying vec4 fragColor;\n"
+    "void main() {\n"
+    "   fragColor = color;\n"
+    "   gl_Position = MVMatrix * TransformMatrix  * vec4(position, 0.0, 1.0);\n"
+    "}\n";
+
+static const GLchar *S52color_tri_fragment_shader_source =
+    "precision highp float;\n"
+    "varying vec4 fragColor;\n"
+    "void main() {\n"
+    "   gl_FragColor = fragColor;\n"
+    "}\n";
+
+// Simple 2D texture shader
+static const GLchar *S52texture_2D_vertex_shader_source =
+    "attribute vec2 position;\n"
+    "attribute vec2 aUV;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+    "varying vec2 varCoord;\n"
+    "void main() {\n"
+    "   gl_Position = MVMatrix * TransformMatrix * vec4(position, 0.0, 1.0);\n"
+    "   //varCoord = aUV.st;\n"
+    "   varCoord = aUV;\n"
+    "}\n";
+
+static const GLchar *S52texture_2D_fragment_shader_source =
+    "precision highp float;\n"
+    "uniform sampler2D uTex;\n"
+    "varying vec2 varCoord;\n"
+    "void main() {\n"
+    "   gl_FragColor = texture2D(uTex, varCoord);\n"
+    "}\n";
+
+// 2D texture shader with color modulation, used for colored text
+static const GLchar *S52texture_2D_ColorMod_vertex_shader_source =
+    "precision highp float;\n"
+    "attribute vec2 position;\n"
+    "attribute vec2 aUV;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+    "varying vec2 varCoord;\n"
+    "void main() {\n"
+    "   gl_Position = MVMatrix * TransformMatrix * vec4(position, 0.0, 1.0);\n"
+    "   //varCoord = aUV.st;\n"
+    "   varCoord = aUV;\n"
+    "}\n";
+
+static const GLchar *S52texture_2D_ColorMod_fragment_shader_source =
+    "precision highp float;\n"
+    "uniform sampler2D uTex;\n"
+    "uniform vec4 color;\n"
+    "varying vec2 varCoord;\n"
+    "void main() {\n"
+    "   vec4 col=texture2D(uTex, varCoord);\n"
+    "   gl_FragColor = color;\n"
+    "   gl_FragColor.a = col.a;\n"
+    "}\n";
+
+//  Circle shader
+
+static const GLchar *S52circle_filled_vertex_shader_source =
+    "precision highp float;\n"
+    "attribute vec2 aPos;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+    "void main() {\n"
+    "   gl_Position = MVMatrix * TransformMatrix * vec4(aPos, 0.0, 1.0);\n"
+    "}\n";
+
+static const GLchar *S52circle_filled_fragment_shader_source =
+    "precision highp float;\n"
+    "uniform float border_width;\n"
+    "uniform float circle_radius;\n"
+    "uniform vec4 circle_color;\n"
+    "uniform vec4 border_color;\n"
+    "uniform vec2 circle_center;\n"
+    "void main(){\n"
+    "float d = distance(gl_FragCoord.xy, circle_center);\n"
+    "if (d < (circle_radius - border_width)) { gl_FragColor = circle_color; }\n"
+    "else if (d < circle_radius) { gl_FragColor = border_color; }\n"
+    "else { gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0); }\n"
+    "}\n";
+
+//  Ring shader
+
+static const GLchar *S52ring_vertex_shader_source =
+    "precision highp float;\n"
+    "attribute vec2 aPos;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+    "void main() {\n"
+    "   gl_Position = MVMatrix * TransformMatrix * vec4(aPos, 0.0, 1.0);\n"
+    "}\n";
+
+static const GLchar *S52ring_fragment_shader_source_old =
+    "precision highp float;\n"
+    "uniform float border_width;\n"
+    "uniform float circle_radius;\n"
+    "uniform float ring_width;\n"
+    "uniform vec4 circle_color;\n"
+    "uniform vec4 border_color;\n"
+    "uniform vec2 circle_center;\n"
+    "uniform float sector_1;\n"
+    "uniform float sector_2;\n"
+
+    "void main(){\n"
+    "const float PI = 3.14159265358979323846264;\n"
+    "bool bdraw = false;\n"
+
+    "float angle = atan(gl_FragCoord.y-circle_center.y, "
+    "gl_FragCoord.x-circle_center.x);\n"
+    "angle = PI/2.0 - angle;\n"
+    "if(angle < 0.0) angle += PI * 2.0;\n"
+
+    "if(sector_2 > PI * 2.0){\n"
+    "    if((angle > sector_1) && (angle < (PI * 2.0) )){\n"
+    "        bdraw = true;\n"
+    "    }\n"
+    "    if(angle < sector_2 - (PI * 2.0)){\n"
+    "        bdraw = true;\n"
+    "    }\n"
+    "} else {\n"
+    "    if((angle > sector_1) && (angle < sector_2)){\n"
+    "        bdraw = true;\n"
+    "    }\n"
+    "}\n"
+
+    "if(bdraw){\n"
+    "   float d = distance(gl_FragCoord.xy, circle_center);\n"
+    "   if (d > circle_radius) {\n"
+    "       discard;\n"
+    "   } else if( d > (circle_radius - border_width)) {\n"
+    "       gl_FragColor = border_color;\n"
+    "   } else if( d > (circle_radius - border_width - ring_width)) {\n"
+    "       gl_FragColor = circle_color;\n"
+    "   } else if( d > (circle_radius - border_width - ring_width - "
+    "border_width)) {\n"
+    "       gl_FragColor = border_color;\n"
+    "   } else  {\n"
+    "       discard;\n"
+    "   }\n"
+    "} else{\n"
+    "   discard;\n"
+    "}\n"
+    "}\n";
+
+
+static const GLchar *S52ring_fragment_shader_source =
+    "precision highp float;\n"
+    "uniform float ring_width;\n"
+    "uniform float circle_radius;\n"
+    "uniform vec4 ring_color;\n"
+    "uniform vec2 circle_center;\n"
+    "uniform float sector_1;\n"
+    "uniform float sector_2;\n"
+
+    "void main(){\n"
+    "const float PI = 3.14159265358979323846264;\n"
+    "bool bdraw = false;\n"
+
+    "float angle = atan(gl_FragCoord.y-circle_center.y, "
+    "gl_FragCoord.x-circle_center.x);\n"
+    "angle = PI/2.0 - angle;\n"
+    "if(angle < 0.0) angle += PI * 2.0;\n"
+
+    "if(sector_2 > PI * 2.0){\n"
+    "    if((angle > sector_1) && (angle < (PI * 2.0) )){\n"
+    "        bdraw = true;\n"
+    "    }\n"
+    "    if(angle < sector_2 - (PI * 2.0)){\n"
+    "        bdraw = true;\n"
+    "    }\n"
+    "} else {\n"
+    "    if((angle > sector_1) && (angle < sector_2)){\n"
+    "        bdraw = true;\n"
+    "    }\n"
+    "}\n"
+
+    "if(bdraw){\n"
+    "   float d = distance(gl_FragCoord.xy, circle_center);\n"
+    "   float delta = 0.9;\n"
+    "   if (d > circle_radius + ring_width/2.) {\n"
+    "       discard;\n"
+    "   } else if( d > (circle_radius )) {\n"
+    "     float alpha = smoothstep(circle_radius + ring_width/2. -delta, circle_radius + ring_width/2., d);\n"
+    "     gl_FragColor = ring_color;\n"
+    "     gl_FragColor.w = 1.-alpha;\n"
+    "   }\n"
+    "   else if( d > (circle_radius - ring_width/2. - delta)) {\n"
+    "       gl_FragColor = ring_color;\n"
+    "       float alpha = smoothstep(circle_radius - ring_width/2. - delta, circle_radius - ring_width/2., d);\n"
+    "       gl_FragColor.w = alpha;\n"
+    "   }\n"
+    "   else  {\n"
+    "       discard;\n"
+    "   }\n"
+    "} else{\n"
+    "   discard;\n"
+    "}\n"
+    "}\n";
+
+// Dash/Dot line shader
+static const GLchar *S52Dash_vertex_shader_source =
+    "attribute vec2 position;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+    "void main() {\n"
+    "   gl_Position = MVMatrix * TransformMatrix * vec4(position, 0.0, 1.0);\n"
+    "}\n";
+
+static const GLchar *S52Dash_fragment_shader_source =
+    "precision highp float;\n"
+    "uniform sampler2D uTex;\n"
+    "uniform vec2 startPos;\n"
+    "uniform float texWidth;\n"
+    "uniform float dashFactor;\n"
+    "uniform vec4 color;\n"
+    "void main() {\n"
+    "   float d = distance(gl_FragCoord.xy, startPos);\n"
+    "   float x = mod(d,texWidth) / texWidth;\n"
+    "   if(x < dashFactor) gl_FragColor = color;\n"
+    "   else gl_FragColor = vec4(0.0, 0.0, 0.0, 0.0);\n"
+    "}\n";
+
+// Texture shader for Area Pattern
+static const GLchar *S52AP_vertex_shader_source =
+    "attribute vec2 position;\n"
+    "attribute vec2 aUV;\n"
+    "uniform mat4 MVMatrix;\n"
+    "uniform mat4 TransformMatrix;\n"
+    "void main() {\n"
+    "   gl_Position = MVMatrix * TransformMatrix * vec4(position, 0.0, 1.0);\n"
+    "}\n";
+
+#if 0
+static const GLchar* S52AP_fragment_shader_source =
+    "precision highp float;\n"
+    "uniform sampler2D uTex;\n"
+    "uniform float texWidth;\n"
+    "uniform float texHeight;\n"
+    "uniform float texPOTWidth;\n"
+    "uniform float texPOTHeight;\n"
+    "uniform float staggerFactor;\n"
+    "uniform vec4 color;\n"
+    "uniform float xOff;\n"
+    "uniform float yOff;\n"
+    "void main() {\n"
+    "   float yp = floor((gl_FragCoord.y + yOff) / texHeight);\n"
+    "   float fstagger = 0.0;\n"
+    "   //if(mod(yp, 2.0) < 0.1) fstagger = staggerFactor;\n"
+    "   float xStag = xOff + (fstagger * texWidth);\n"
+    "   float x = mod((gl_FragCoord.x - xStag),texWidth) / texPOTWidth;\n"
+    "   float y = mod((gl_FragCoord.y + yOff),texHeight) / texPOTHeight;\n"
+     "   gl_FragColor = texture2D(uTex, vec2(x, (texHeight / texPOTHeight) - y));\n"
+    "}\n";
+#else
+
+static const GLchar *S52AP_fragment_shader_source =
+    "precision highp float;\n"
+    "uniform sampler2D uTex;\n"
+    "uniform float texWidth;\n"
+    "uniform float texHeight;\n"
+    "uniform float texPOTWidth;\n"
+    "uniform float texPOTHeight;\n"
+    "uniform float staggerFactor;\n"
+    "uniform vec4 color;\n"
+    "uniform float xOff;\n"
+    "uniform float yOff;\n"
+    "uniform float yOffM;\n"
+    "void main() {\n"
+    "   float yp = floor((gl_FragCoord.y + yOffM ) / texPOTHeight);\n"
+    "   float fstagger = 0.0;\n"
+    "   if(mod(yp, 2.0) < 0.1) fstagger = 0.5;\n"
+    "   float x = (gl_FragCoord.x - xOff) / texPOTWidth;\n"
+    "   float y = (gl_FragCoord.y + yOff) / texPOTHeight;\n"
+    "   gl_FragColor = texture2D(uTex, vec2(x + fstagger, -y));\n"
+    "}\n";
+#endif
+
+GLint S52color_tri_fragment_shader;
+GLint S52color_tri_vertex_shader;
+
+GLint S52texture_2D_fragment_shader;
+GLint S52texture_2D_vertex_shader;
+
+GLint S52texture_2D_ColorMod_fragment_shader;
+GLint S52texture_2D_ColorMod_vertex_shader;
+
+GLint S52circle_filled_vertex_shader;
+GLint S52circle_filled_fragment_shader;
+
+GLint S52ring_vertex_shader;
+GLint S52ring_fragment_shader;
+
+GLint S52Dash_vertex_shader;
+GLint S52Dash_fragment_shader;
+
+GLint S52AP_vertex_shader;
+GLint S52AP_fragment_shader;
+
+extern GLint S52color_tri_shader_program;
+extern GLint S52texture_2D_shader_program;
+extern GLint S52texture_2D_ColorMod_shader_program;
+extern GLint S52circle_filled_shader_program;
+extern GLint S52ring_shader_program;
+extern GLint S52Dash_shader_program;
+extern GLint S52AP_shader_program;
+
+S52_GLShaderProgram *pS52texture_2D_ColorMod_shader_program;
+
+
+bool shadersLoaded = false;
+
+bool loadS52Shaders() {
+  bool ret_val = true;
+  //GLint success;
+
+  enum Consts { INFOLOG_LEN = 512 };
+#if 0
+  GLchar infoLog[INFOLOG_LEN];
+#endif
+
+  // Are the shaders ready?
+  if(shadersLoaded)
+    return true;
+
+  // Simple colored triangle shader
+
+  if (!S52color_tri_vertex_shader) {
+    auto shaderProgram = S52_GLShaderProgram::Builder()
+     .addShaderFromSource(S52color_tri_vertex_shader_source, GL_VERTEX_SHADER)
+     .addShaderFromSource(S52color_tri_fragment_shader_source, GL_FRAGMENT_SHADER)
+     .linkProgram();
+
+    S52color_tri_shader_program = shaderProgram.programId();
+  }
+
+
+  if (!S52texture_2D_shader_program) {
+    auto shaderProgram = S52_GLShaderProgram::Builder()
+     .addShaderFromSource(S52texture_2D_vertex_shader_source, GL_VERTEX_SHADER)
+     .addShaderFromSource(S52texture_2D_fragment_shader_source, GL_FRAGMENT_SHADER)
+     .linkProgram();
+
+    S52texture_2D_shader_program = shaderProgram.programId();
+  }
+
+#if 0
+  // Simple 2D texture shader
+
+  if (!S52texture_2D_vertex_shader) {
+    /* Vertex shader */
+    S52texture_2D_vertex_shader = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(S52texture_2D_vertex_shader, 1,
+                   &S52texture_2D_vertex_shader_source, NULL);
+    glCompileShader(S52texture_2D_vertex_shader);
+    glGetShaderiv(S52texture_2D_vertex_shader, GL_COMPILE_STATUS, &success);
+    if (!success) {
+      glGetShaderInfoLog(S52texture_2D_vertex_shader, INFOLOG_LEN, NULL,
+                         infoLog);
+      //        printf("ERROR::SHADER::VERTEX::COMPILATION_FAILED\n%s\n",
+      //        infoLog);
+      ret_val = false;
+    }
+  }
+
+  if (!S52texture_2D_fragment_shader) {
+    /* Fragment shader */
+    S52texture_2D_fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(S52texture_2D_fragment_shader, 1,
+                   &S52texture_2D_fragment_shader_source, NULL);
+    glCompileShader(S52texture_2D_fragment_shader);
+    glGetShaderiv(S52texture_2D_fragment_shader, GL_COMPILE_STATUS, &success);
+    if (!success) {
+      glGetShaderInfoLog(S52texture_2D_fragment_shader, INFOLOG_LEN, NULL,
+                         infoLog);
+      //        printf("ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n%s\n",
+      //        infoLog);
+      ret_val = false;
+    }
+  }
+
+  if (!S52texture_2D_shader_program) {
+    /* Link shaders */
+    S52texture_2D_shader_program = glCreateProgram();
+    glAttachShader(S52texture_2D_shader_program, S52texture_2D_vertex_shader);
+    glAttachShader(S52texture_2D_shader_program, S52texture_2D_fragment_shader);
+    glLinkProgram(S52texture_2D_shader_program);
+    glGetProgramiv(S52texture_2D_shader_program, GL_LINK_STATUS, &success);
+    if (!success) {
+      glGetProgramInfoLog(S52texture_2D_shader_program, INFOLOG_LEN, NULL,
+                          infoLog);
+      //        printf("ERROR::SHADER::PROGRAM::LINKING_FAILED\n%s\n", infoLog);
+      ret_val = false;
+    }
+  }
+#endif
+
+  // 2D texture shader with color Modulate
+  if (!S52texture_2D_ColorMod_shader_program) {
+
+    auto shaderProgram = S52_GLShaderProgram::Builder()
+     .addShaderFromSource(S52texture_2D_ColorMod_vertex_shader_source, GL_VERTEX_SHADER)
+     .addShaderFromSource(S52texture_2D_ColorMod_fragment_shader_source, GL_FRAGMENT_SHADER)
+     .linkProgram();
+
+    S52texture_2D_ColorMod_shader_program = shaderProgram.programId();
+
+  }
+
+#if 0
+  if (!S52texture_2D_ColorMod_vertex_shader) {
+    /* Vertex shader */
+    S52texture_2D_ColorMod_vertex_shader = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(S52texture_2D_ColorMod_vertex_shader, 1,
+                   &S52texture_2D_ColorMod_vertex_shader_source, NULL);
+    glCompileShader(S52texture_2D_ColorMod_vertex_shader);
+    glGetShaderiv(S52texture_2D_ColorMod_vertex_shader, GL_COMPILE_STATUS,
+                  &success);
+    if (!success) {
+      glGetShaderInfoLog(S52texture_2D_ColorMod_vertex_shader, INFOLOG_LEN,
+                         NULL, infoLog);
+      //        printf("ERROR::SHADER::VERTEX::COMPILATION_FAILED\n%s\n",
+      //        infoLog);
+      ret_val = false;
+    }
+  }
+
+
+  if (!S52texture_2D_ColorMod_fragment_shader) {
+    /* Fragment shader */
+    S52texture_2D_ColorMod_fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(S52texture_2D_ColorMod_fragment_shader, 1,
+                   &S52texture_2D_ColorMod_fragment_shader_source, NULL);
+    glCompileShader(S52texture_2D_ColorMod_fragment_shader);
+    glGetShaderiv(S52texture_2D_ColorMod_fragment_shader, GL_COMPILE_STATUS,
+                  &success);
+    if (!success) {
+      glGetShaderInfoLog(S52texture_2D_ColorMod_fragment_shader, INFOLOG_LEN,
+                         NULL, infoLog);
+      //        printf("ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n%s\n",
+      //        infoLog);
+      ret_val = false;
+    }
+  }
+
+  if (!S52texture_2D_ColorMod_shader_program) {
+    /* Link shaders */
+    S52texture_2D_ColorMod_shader_program = glCreateProgram();
+    glAttachShader(S52texture_2D_ColorMod_shader_program,
+                   S52texture_2D_ColorMod_vertex_shader);
+    glAttachShader(S52texture_2D_ColorMod_shader_program,
+                   S52texture_2D_ColorMod_fragment_shader);
+    glLinkProgram(S52texture_2D_ColorMod_shader_program);
+    glGetProgramiv(S52texture_2D_ColorMod_shader_program, GL_LINK_STATUS,
+                   &success);
+    if (!success) {
+      glGetProgramInfoLog(S52texture_2D_ColorMod_shader_program, INFOLOG_LEN,
+                          NULL, infoLog);
+      //        printf("ERROR::SHADER::PROGRAM::LINKING_FAILED\n%s\n", infoLog);
+      ret_val = false;
+    }
+  }
+#endif
+
+  // Circle shader
+  if (!S52circle_filled_shader_program) {
+    auto shaderProgram = S52_GLShaderProgram::Builder()
+     .addShaderFromSource(S52circle_filled_vertex_shader_source, GL_VERTEX_SHADER)
+     .addShaderFromSource(S52circle_filled_fragment_shader_source, GL_FRAGMENT_SHADER)
+     .linkProgram();
+
+    S52circle_filled_shader_program = shaderProgram.programId();
+  }
+
+#if 0
+  if (!S52circle_filled_vertex_shader) {
+    /* Vertex shader */
+    S52circle_filled_vertex_shader = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(S52circle_filled_vertex_shader, 1,
+                   &S52circle_filled_vertex_shader_source, NULL);
+    glCompileShader(S52circle_filled_vertex_shader);
+    glGetShaderiv(S52circle_filled_vertex_shader, GL_COMPILE_STATUS, &success);
+    if (!success) {
+      glGetShaderInfoLog(S52circle_filled_vertex_shader, INFOLOG_LEN, NULL,
+                         infoLog);
+      //            printf("ERROR::SHADER::VERTEX::COMPILATION_FAILED\n%s\n",
+      //            infoLog);
+      ret_val = false;
+    }
+  }
+
+  if (!S52circle_filled_fragment_shader) {
+    /* Fragment shader */
+    S52circle_filled_fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(S52circle_filled_fragment_shader, 1,
+                   &S52circle_filled_fragment_shader_source, NULL);
+    glCompileShader(S52circle_filled_fragment_shader);
+    glGetShaderiv(S52circle_filled_fragment_shader, GL_COMPILE_STATUS,
+                  &success);
+    if (!success) {
+      glGetShaderInfoLog(S52circle_filled_fragment_shader, INFOLOG_LEN, NULL,
+                         infoLog);
+      //            printf("ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n%s\n",
+      //            infoLog);
+      ret_val = false;
+    }
+  }
+
+  if (!S52circle_filled_shader_program) {
+    /* Link shaders */
+    S52circle_filled_shader_program = glCreateProgram();
+    glAttachShader(S52circle_filled_shader_program,
+                   S52circle_filled_vertex_shader);
+    glAttachShader(S52circle_filled_shader_program,
+                   S52circle_filled_fragment_shader);
+    glLinkProgram(S52circle_filled_shader_program);
+    glGetProgramiv(S52circle_filled_shader_program, GL_LINK_STATUS, &success);
+    if (!success) {
+      glGetProgramInfoLog(S52circle_filled_shader_program, INFOLOG_LEN, NULL,
+                          infoLog);
+      //            printf("ERROR::SHADER::PROGRAM::LINKING_FAILED\n%s\n",
+      //            infoLog);
+      ret_val = false;
+    }
+  }
+#endif
+
+  // Ring shader
+  if (!S52ring_shader_program) {
+    auto shaderProgram = S52_GLShaderProgram::Builder()
+     .addShaderFromSource(S52ring_vertex_shader_source, GL_VERTEX_SHADER)
+     .addShaderFromSource(S52ring_fragment_shader_source, GL_FRAGMENT_SHADER)
+     .linkProgram();
+
+    S52ring_shader_program = shaderProgram.programId();
+  }
+
+#if 0
+  if (!S52ring_vertex_shader) {
+    /* Vertex shader */
+    S52ring_vertex_shader = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(S52ring_vertex_shader, 1, &S52ring_vertex_shader_source,
+                   NULL);
+    glCompileShader(S52ring_vertex_shader);
+    glGetShaderiv(S52ring_vertex_shader, GL_COMPILE_STATUS, &success);
+    if (!success) {
+      glGetShaderInfoLog(S52ring_vertex_shader, INFOLOG_LEN, NULL, infoLog);
+      //           printf("ERROR::SHADER::VERTEX::COMPILATION_FAILED\n%s\n",
+      //           infoLog);
+      ret_val = false;
+    }
+  }
+
+  if (!S52ring_fragment_shader) {
+    /* Fragment shader */
+    S52ring_fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(S52ring_fragment_shader, 1, &S52ring_fragment_shader_source,
+                   NULL);
+    glCompileShader(S52ring_fragment_shader);
+    glGetShaderiv(S52ring_fragment_shader, GL_COMPILE_STATUS, &success);
+    if (!success) {
+      glGetShaderInfoLog(S52ring_fragment_shader, INFOLOG_LEN, NULL, infoLog);
+      //            printf("ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n%s\n",
+      //            infoLog);
+      ret_val = false;
+    }
+  }
+
+  if (!S52ring_shader_program) {
+    /* Link shaders */
+    S52ring_shader_program = glCreateProgram();
+    glAttachShader(S52ring_shader_program, S52ring_vertex_shader);
+    glAttachShader(S52ring_shader_program, S52ring_fragment_shader);
+    glLinkProgram(S52ring_shader_program);
+    glGetProgramiv(S52ring_shader_program, GL_LINK_STATUS, &success);
+    if (!success) {
+      glGetProgramInfoLog(S52ring_shader_program, INFOLOG_LEN, NULL, infoLog);
+      //            printf("ERROR::SHADER::PROGRAM::LINKING_FAILED\n%s\n",
+      //            infoLog);
+      ret_val = false;
+    }
+  }
+#endif
+
+  // Dash shader
+  if (!S52Dash_shader_program) {
+    auto shaderProgram = S52_GLShaderProgram::Builder()
+     .addShaderFromSource(S52Dash_vertex_shader_source, GL_VERTEX_SHADER)
+     .addShaderFromSource(S52Dash_fragment_shader_source, GL_FRAGMENT_SHADER)
+     .linkProgram();
+
+    S52Dash_shader_program = shaderProgram.programId();
+  }
+
+#if 0
+  if (!S52Dash_vertex_shader) {
+    /* Vertex shader */
+    S52Dash_vertex_shader = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(S52Dash_vertex_shader, 1, &S52Dash_vertex_shader_source,
+                   NULL);
+    glCompileShader(S52Dash_vertex_shader);
+    glGetShaderiv(S52Dash_vertex_shader, GL_COMPILE_STATUS, &success);
+    if (!success) {
+      glGetShaderInfoLog(S52ring_vertex_shader, INFOLOG_LEN, NULL, infoLog);
+      //            printf("ERROR::SHADER::VERTEX::COMPILATION_FAILED\n%s\n",
+      //            infoLog);
+      ret_val = false;
+    }
+  }
+
+  if (!S52Dash_fragment_shader) {
+    /* Fragment shader */
+    S52Dash_fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(S52Dash_fragment_shader, 1, &S52Dash_fragment_shader_source,
+                   NULL);
+    glCompileShader(S52Dash_fragment_shader);
+    glGetShaderiv(S52Dash_fragment_shader, GL_COMPILE_STATUS, &success);
+    if (!success) {
+      glGetShaderInfoLog(S52Dash_fragment_shader, INFOLOG_LEN, NULL, infoLog);
+      //            printf("ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n%s\n",
+      //            infoLog);
+      ret_val = false;
+    }
+  }
+
+  if (!S52Dash_shader_program) {
+    /* Link shaders */
+    S52Dash_shader_program = glCreateProgram();
+    glAttachShader(S52Dash_shader_program, S52Dash_vertex_shader);
+    glAttachShader(S52Dash_shader_program, S52Dash_fragment_shader);
+    glLinkProgram(S52Dash_shader_program);
+    glGetProgramiv(S52Dash_shader_program, GL_LINK_STATUS, &success);
+    if (!success) {
+      glGetProgramInfoLog(S52Dash_shader_program, INFOLOG_LEN, NULL, infoLog);
+      //            printf("ERROR::SHADER::PROGRAM::LINKING_FAILED\n%s\n",
+      //            infoLog);
+      ret_val = false;
+    }
+  }
+#endif
+
+  // AP shader
+    if (!S52AP_shader_program) {
+    auto shaderProgram = S52_GLShaderProgram::Builder()
+     .addShaderFromSource(S52AP_vertex_shader_source, GL_VERTEX_SHADER)
+     .addShaderFromSource(S52AP_fragment_shader_source, GL_FRAGMENT_SHADER)
+     .linkProgram();
+
+    S52AP_shader_program = shaderProgram.programId();
+  }
+
+#if 0
+  if (!S52AP_vertex_shader) {
+    /* Vertex shader */
+    S52AP_vertex_shader = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(S52AP_vertex_shader, 1, &S52AP_vertex_shader_source, NULL);
+    glCompileShader(S52AP_vertex_shader);
+    glGetShaderiv(S52AP_vertex_shader, GL_COMPILE_STATUS, &success);
+    if (!success) {
+      glGetShaderInfoLog(S52ring_vertex_shader, INFOLOG_LEN, NULL, infoLog);
+      //            printf("ERROR::SHADER::VERTEX::COMPILATION_FAILED\n%s\n",
+      //            infoLog);
+      ret_val = false;
+    }
+  }
+
+  if (!S52AP_fragment_shader) {
+    /* Fragment shader */
+    S52AP_fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(S52AP_fragment_shader, 1, &S52AP_fragment_shader_source,
+                   NULL);
+    glCompileShader(S52AP_fragment_shader);
+    glGetShaderiv(S52AP_fragment_shader, GL_COMPILE_STATUS, &success);
+    if (!success) {
+      glGetShaderInfoLog(S52AP_fragment_shader, INFOLOG_LEN, NULL, infoLog);
+      //          printf("ERROR::SHADER::FRAGMENT::COMPILATION_FAILED\n%s\n",
+      //          infoLog);
+      ret_val = false;
+    }
+  }
+
+  if (!S52AP_shader_program) {
+    /* Link shaders */
+    S52AP_shader_program = glCreateProgram();
+    glAttachShader(S52AP_shader_program, S52AP_vertex_shader);
+    glAttachShader(S52AP_shader_program, S52AP_fragment_shader);
+    glLinkProgram(S52AP_shader_program);
+    glGetProgramiv(S52AP_shader_program, GL_LINK_STATUS, &success);
+    if (!success) {
+      glGetProgramInfoLog(S52AP_shader_program, INFOLOG_LEN, NULL, infoLog);
+      //            printf("ERROR::SHADER::PROGRAM::LINKING_FAILED\n%s\n",
+      //            infoLog);
+      ret_val = false;
+    }
+  }
+#endif
+  shadersLoaded = true;
+
+  return ret_val;
+}
+
+
+#endif

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/s52shaders.h

@@ -0,0 +1,139 @@
+/***************************************************************************
+ *
+ * Project:  OpenCPN
+ * Purpose:  S52 Presentation Library
+ * Authors:   David Register
+ *            Jesper Weissglas
+ *
+ ***************************************************************************
+ *   Copyright (C) 2010 by David S. Register                               *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ **************************************************************************/
+
+#ifndef __S52SHADERS_H__
+#define __S52SHADERS_H__
+
+#if defined(USE_ANDROID_GLES2) || defined(ocpnUSE_GLSL)
+#include <string>
+#include <string.h>
+
+#include "s52plibGL.h"
+
+extern const GLchar* S52_preamble;
+
+enum Consts { INFOLOG_LEN = 512 };
+
+class S52_GLShaderProgram
+{
+public:
+
+    class Builder {
+    public:
+        Builder() : linked_(false) {
+            programId_ = glCreateProgram();
+        }
+
+        Builder & addShaderFromSource(std::string const &shaderSource, GLenum shaderType) {
+            char const *shaderCStr = shaderSource.c_str();
+            GLuint shaderId = glCreateShader(shaderType);
+
+            GLchar const* files[] = { S52_preamble, shaderCStr };
+            GLint lengths[]       = { (GLint)strlen(S52_preamble),  (GLint)strlen(shaderCStr)  };
+
+            glShaderSource(shaderId, 2, files, lengths);
+            //glShaderSource(shaderId, 1, &shaderCStr, nullptr);
+
+            glCompileShader(shaderId);
+            glGetShaderiv(shaderId, GL_COMPILE_STATUS, &success);
+            if (!success) {
+              glGetShaderInfoLog(shaderId, INFOLOG_LEN, NULL, infoLog);
+              printf("ERROR::SHADER::COMPILATION_FAILED\n%s\n", infoLog);
+              //ret_val = false;
+            }
+
+            glAttachShader(programId_, shaderId);
+            return *this;
+        }
+
+//         void addShaderFromFile(std::string const &shaderFile, GLenum shaderType) {
+//             std::ifstream fileName(shaderFile);
+//             std::istreambuf_iterator<char> fileBegin(fileName), fileEnd;
+//             std::string fileContents(fileBegin, fileEnd);
+//             return addShaderFromSource(fileContents, shaderType);
+//         }
+
+        S52_GLShaderProgram linkProgram() {
+            glLinkProgram(programId_);
+            glGetProgramiv( programId_, GL_LINK_STATUS, &linkSuccess); //requesting the status
+            if (linkSuccess == GL_FALSE) {
+              glGetProgramInfoLog(programId_, INFOLOG_LEN, NULL, infoLog);
+              printf("ERROR::SHADER::LINK_FAILED\n%s\n", infoLog);
+            }
+
+            S52_GLShaderProgram theProgram(programId_);
+            //deleteAttachedShaders(programId_);
+            linked_ = true;
+            return theProgram;
+        }
+
+        ~Builder() {
+             if(!linked_) {
+                 glDeleteProgram(programId_);
+             }
+         }
+    private:
+        GLuint programId_;
+        bool linked_;
+        GLint success;
+        GLint linkSuccess;
+        GLchar infoLog[INFOLOG_LEN];
+    };
+
+    S52_GLShaderProgram() : programId_(0) { }
+
+    S52_GLShaderProgram(S52_GLShaderProgram &&other) {
+        *this = std::move(other);
+    }
+
+    S52_GLShaderProgram &operator=(S52_GLShaderProgram &&other)
+    {
+        programId_ = other.programId_;
+        other.programId_ = 0;
+
+        if (other.programId_ != 0) {
+            glDeleteProgram(other.programId_);
+        }
+
+        return *this;
+    }
+
+    ~S52_GLShaderProgram() { }
+
+    GLuint programId() const { return programId_; }
+
+    S52_GLShaderProgram(S52_GLShaderProgram const &other) = delete;
+    S52_GLShaderProgram &operator=(S52_GLShaderProgram const &other) = delete;
+private:
+    S52_GLShaderProgram(GLuint programId) : programId_(programId) { }
+    GLuint programId_;
+};
+
+#endif
+
+
+
+#endif

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/s52utils.cpp

@@ -0,0 +1,189 @@
+/******************************************************************************
+ *
+ * Project:  OpenCPN
+ * Purpose:  S52 Utility Library
+ * Author:   David Register, Sylvain Duclos
+ *
+ ***************************************************************************
+ *   Copyright (C) 2010 by David S. Register                               *
+ *                                                                         *
+ *   Copyright (C) 2000-2004  Sylvain Duclos                               *
+ *   sduclos@users.sourceforgue.net                                        *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,  USA.         *
+ ***************************************************************************
+ *
+ */
+
+
+#include "s52utils.h"
+//#include <stdio.h>        // FILE
+//#include <string.h>       // strncmp()
+
+//#include <stdlib.h>       // exit()
+
+// configuration file
+#define CONF_NAME "./s52test.conf"
+
+#define TRUE 1
+#define FALSE 0
+
+//#define CPATH_MAX 255
+///////////////////////////////////////////////////////////////////
+//
+//   GLOBAL MARINER PARAMETER (will move out)
+//
+// NOTE: value for Chart No 1 found in README
+//
+// Soundings      ON
+// Text           ON
+// Depth Shades   4
+// Safety Contour 10 m
+// Safety Depth   7 m
+// Shallow        5 m
+// Deep           30 m
+
+/* A) value for Chart No 1 */
+/*
+double SHOW_TEXT       = TRUE;    // view group 23
+double TWO_SHADES      = FALSE;   // flag indicating selection of two depth
+shades (on/off) [default ON] double SAFETY_CONTOUR  = 10.0;    // selected
+safety contour (meters) [IMO PS 3.6] double SAFETY_DEPTH    = 7.0;     //
+selected safety depth (meters) [IMO PS 3.7] double SHALLOW_CONTOUR = 5.0;     //
+selected shallow water contour (meters) (optional) double DEEP_CONTOUR = 30.0;
+// selected deepwatercontour (meters) (optional)
+*/
+
+/* B) value for testing */
+/*
+//gboolean TWO_SHADES      = TRUE;     // flag indicating selection of two depth
+shades (on/off) [default ON] gboolean TWO_SHADES      = FALSE;    // flag
+indicating selection of two depth shades (on/off) [default ON] gboolean
+SHOW_TEXT       = TRUE;     // view group 23
+//double    SAFETY_DEPTH    = 30.0;    // selected safety depth (meters) [IMO
+PS 3.7]
+//double    SHALLOW_CONTOUR = 2.0;     // selected shallow water contour
+(meters) (optional) double    SAFETY_DEPTH    = 15.0;    // selected safety
+depth (meters) [IMO PS 3.7] double    SHALLOW_CONTOUR = 5.0;     // selected
+shallow water contour (meters) (optional)
+//double    SAFETY_CONTOUR  = 30.0;    // selected safety contour (meters) [IMO
+PS 3.6]
+//double    DEEP_CONTOUR    = 30.0;    // selected deepwatercontour (meters)
+(optional)
+//double    SAFETY_CONTOUR  = 5.0;     // selected safety contour (meters) [IMO
+PS 3.6]
+//double    DEEP_CONTOUR    = 10.0;    // selected deepwatercontour (meters)
+(optional) double    SAFETY_CONTOUR  = 10.0;    // selected safety contour
+(meters) [IMO PS 3.6] double    DEEP_CONTOUR    = 15.0;    // selected
+deepwatercontour (meters) (optional)
+*/
+
+/* param needed for certain conditional symbology */
+/*
+gboolean SHALLOW_PATTERN = FALSE;    // flag indicating selection of shallow
+water highlight (on/off)(optional) [default OFF] gboolean SHIPS_OUTLINE   =
+FALSE;    // flag indicating selection of ship scale symbol (on/off) [IMO
+PS 8.4] double   DISTANCE_TAGS   = 0.0;      // selected spacing of "distance to
+run" tags at a route (nm) double   TIME_TAGS       = 0.0;      // selected
+spacing of time tags at the pasttrack (min) gboolean FULL_SECTORS    = TRUE; //
+show full length light sector lines gboolean SYMBOLIZED_BND  = TRUE;     //
+symbolized area boundaries
+*/
+
+// WARNING: must be in sync with S52_MAR_param_t
+/*
+static char *_MARparamNm[]  = {
+    "S52_MAR_NONE",             //= 0,    // default
+    "S52_MAR_SHOW_TEXT",        //= 1,    // view group 23
+    "S52_MAR_TWO_SHADES",       //= 2,    // flag indicating selection of two
+depth shades (on/off) [default ON] "S52_MAR_SAFETY_CONTOUR",   //= 3,    //
+selected safety contour (meters) [IMO PS 3.6] "S52_MAR_SAFETY_DEPTH",     //= 4,
+// selected safety depth (meters) [IMO PS 3.7] "S52_MAR_SHALLOW_CONTOUR",  //=
+5,    // selected shallow water contour (meters) (optional)
+    "S52_MAR_DEEP_CONTOUR",     //= 6,    // selected deepwatercontour (meters)
+(optional) "S52_MAR_SHALLOW_PATTERN",  //= 7,    // flag indicating selection of
+shallow water highlight (on/off)(optional) [default OFF]
+    "S52_MAR_SHIPS_OUTLINE",    //= 8,    // flag indicating selection of ship
+scale symbol (on/off) [IMO PS 8.4] "S52_MAR_DISTANCE_TAGS",    //= 9,    //
+selected spacing of "distance to run" tags at a route (nm) "S52_MAR_TIME_TAGS",
+//= 10,   // selected spacing of time tags at the pasttrack (min)
+    "S52_MAR_FULL_SECTORS",     //= 11,   // show full length light sector lines
+    "S52_MAR_SYMBOLIZED_BND",   //= 12,   // symbolized area boundaries
+    "S52_MAR_SYMPLIFIED_PNT",   //= 13,   // simplified point
+    "S52_MAR_DISP_CATEGORY",    //= 14,   // display category
+    "S52_MAR_COLOR_PALETTE",    //= 15,   // color palette
+
+    "S52_MAR_NUM"               //= 16    // number of parameters
+};
+*/
+
+// WARNING: must be in sync with _MARparamNm
+static double _MARparamVal[] = {
+    0.0,    // NONE
+    TRUE,   // SHOW_TEXT
+    FALSE,  // TWO_SHADES
+
+    3.0,  // SAFETY_CONTOUR
+    // 0.0,     // SAFETY_CONTOUR  --to test DEPCNT02 selection (GL) in
+    // CA49995A.000 0.5,     // SAFETY_CONTOUR  --to test DEPCNT02 selection (GL)
+    // in CA49995A.000
+
+    3.0,  // SAFETY_DEPTH
+    // 5.0,      // SAFETY_DEPTH
+
+    2.0,  // SHALLOW_CONTOUR
+    6.0,  // DEEP_CONTOUR
+
+    // FALSE,    // SHALLOW_PATTERN
+    TRUE,  // SHALLOW_PATTERN
+
+    FALSE,  // SHIPS_OUTLINE
+    0.0,    // DISTANCE_TAGS
+    0.0,    // TIME_TAGS
+    TRUE,   // FULL_SECTORS
+    FALSE,  // SYMBOLIZED_BND
+
+    FALSE,  // SYMPLIFIED_PNT
+
+    //    'D',      // S52_MAR_DISP_CATEGORY --DISPLAYBASE
+    //    'S',      // S52_MAR_DISP_CATEGORY --STANDARD
+    'O',  // S52_MAR_DISP_CATEGORY --OTHER
+
+    //    0,        // S52_MAR_COLOR_PALETTE --DAY_BRIGHT
+    1,  // S52_MAR_COLOR_PALETTE --DAY_BLACKBACK
+        //    2,        // S52_MAR_COLOR_PALETTE --DAY_WHITEBACK
+        //    3,        // S52_MAR_COLOR_PALETTE --DUSK
+        //    4,        // S52_MAR_COLOR_PALETTE --NIGHT
+
+    16.0  // NUM
+};
+
+double S52_getMarinerParam(S52_MAR_param_t param)
+// return Mariner parameter or '0.0' if fail
+// FIXME: check mariner param against groups selection
+{
+  //      DSR
+  return _MARparamVal[param];
+}
+
+int S52_setMarinerParam(S52_MAR_param_t param, double val) {
+  if (S52_MAR_NONE < param && param < S52_MAR_NUM)
+    _MARparamVal[param] = val;
+  else
+    return FALSE;
+
+  return TRUE;
+}

docs/外部参考/OpenCPN源码基线_f7211b4e/上游源码/libs/s52plib/src/s52utils.h

@@ -0,0 +1,91 @@
+// S52utils.h: utility
+//
+// Project:  OpENCview
+
+/*
+    This file is part of the OpENCview project, a viewer of ENC
+    Copyright (C) 2000-2004  Sylvain Duclos sduclos@users.sourceforgue.net
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+   USA.
+*/
+
+#ifndef __S52UTILS_H__
+#define __S52UTILS_H__
+
+#include "wx/wxprec.h"
+
+#ifndef WX_PRECOMP
+#include "wx/wx.h"
+#endif  // precompiled headers
+
+inline int roundint (double x)
+{
+#ifdef __WXOSX__
+    return wxRound(x);     //FS#1278
+#else
+  int tmp = static_cast<int>(x);
+  tmp += (x - tmp >= .5) - (x - tmp <= -.5);
+  return tmp;
+#endif
+}
+
+#ifdef SOLARIS
+// well should be cc
+#define PRINTF printf(__FILE__ ":%i: : ", __LINE__), printf
+#else
+#define PRINTF printf(__FILE__ ":%i: %s(): ", __LINE__, __FUNCTION__), printf
+#endif
+
+// valid label in .conf file
+#define CONF_CATALOG "CATALOG"
+#define CONF_PLIB "PLIB"
+#define CONF_CHART "CHART"
+#define CONF_RGB "DUMMY_RGB_BRIGHT"
+
+// global parameter for mariners' selection
+typedef enum _S52_MAR_param_t {
+  S52_MAR_NONE = 0,       // default
+  S52_MAR_SHOW_TEXT = 1,  // view group 23
+  S52_MAR_TWO_SHADES =
+      2,  // flag indicating selection of two depth shades (on/off) [default ON]
+  S52_MAR_SAFETY_CONTOUR = 3,  // selected safety contour (meters) [IMO PS 3.6]
+  S52_MAR_SAFETY_DEPTH = 4,    // selected safety depth (meters) [IMO PS 3.7]
+  S52_MAR_SHALLOW_CONTOUR =
+      5,  // selected shallow water contour (meters) (optional)
+  S52_MAR_DEEP_CONTOUR = 6,     // selected deepwatercontour (meters) (optional)
+  S52_MAR_SHALLOW_PATTERN = 7,  // flag indicating selection of shallow water
+                                // highlight (on/off)(optional) [default OFF]
+  S52_MAR_SHIPS_OUTLINE = 8,  // flag indicating selection of ship scale symbol
+                              // (on/off) [IMO PS 8.4]
+  S52_MAR_DISTANCE_TAGS =
+      9,  // selected spacing of "distance to run" tags at a route (nm)
+  S52_MAR_TIME_TAGS =
+      10,  // selected spacing of time tags at the pasttrack (min)
+  S52_MAR_FULL_SECTORS = 11,    // show full length light sector lines
+  S52_MAR_SYMBOLIZED_BND = 12,  // symbolized area boundaries
+
+  S52_MAR_SYMPLIFIED_PNT = 13,  // simplified point
+
+  S52_MAR_DISP_CATEGORY = 14,  // display category
+
+  S52_MAR_COLOR_PALETTE = 15,  // color palette
+
+  S52_MAR_NUM = 16  // number of parameters
+} S52_MAR_param_t;
+
+extern double S52_getMarinerParam(S52_MAR_param_t param);
+extern int S52_setMarinerParam(S52_MAR_param_t param, double val);
+#endif

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docs/外部参考/OpenCPN源码基线_f7211b4e/许可证/COPYING.gplv2

@@ -0,0 +1,278 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
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+
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+  The licenses for most software are designed to take away your
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+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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docs/外部参考/OpenCPN源码基线_f7211b4e/许可证/COPYING.gplv3

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
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+  The licenses for most software and other practical works are designed
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docs/外部参考/OpenCPN源码基线_f7211b4e/说明.md

@@ -0,0 +1,25 @@
+# OpenCPN 对照源码基线说明
+
+本目录保存 CM95 → PBF → S-52 / OpenCPN 流程等价审计使用的 OpenCPN 上游源码快照。
+
+## 固定上游基线
+
+- OpenCPN commit：`f7211b4e1874c453e37a7f190aa191c55a25c32e`
+- 本地取得来源：`/tmp/opencpn-s52-audit/`
+- 保存方式：按上游原始文件内容复制，不对源码做修改。
+- `gui/src/cm93.cpp` 因原 checkout 使用 sparse-checkout 未落到工作树，使用 `git show <commit>:gui/src/cm93.cpp` 从同一 commit 直接导出。
+- `/tmp/opencpn_cm93.cpp` 与该 commit 的 `gui/src/cm93.cpp` SHA-256 已确认完全一致。
+
+## 保存范围
+
+- `上游源码/gui/src/cm93.cpp`：CM93 对象创建、M_COVR 与 CM93→S57/S-52 类转换参考。
+- `上游源码/libs/s52plib/src/`：完整 S-52 Presentation Library 源码目录，包含 CSP、Lookup/rule parser、primitive renderer、chartsymbols 与相关辅助实现。
+- `许可证/`：上游 GPL v2 / GPL v3 许可证原文。
+- `文件校验.sha256`：本目录上游源码与许可证文件的 SHA-256 校验清单。
+- `上游提交.txt`：固定 commit 全长 hash。
+
+## 审计规则
+
+后续 CM95 的 OpenCPN Code-First S-52 Rendering Equivalence Audit 应优先引用本目录，不再依赖 `/tmp` 临时文件。
+本目录是只读参考快照；如果以后切换 OpenCPN 基线，不覆盖本目录，而应新增新的 commit 基线目录并在审计报告中明确使用哪一版。
+源码文件保留其原始版权与许可证声明；CM95 自有代码与此上游参考快照必须保持清晰边界。