92 lines
3.2 KiB
C++
92 lines
3.2 KiB
C++
#include <mbgl/shader/sdf_shader.hpp>
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#include <mbgl/shader/shaders.hpp>
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#include <mbgl/platform/gl.hpp>
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#include <cstdio>
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using namespace mbgl;
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SDFShader::SDFShader()
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: Shader(
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"sdf",
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shaders[SDF_SHADER].vertex,
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shaders[SDF_SHADER].fragment
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) {
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if (!valid) {
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fprintf(stderr, "invalid sdf shader\n");
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return;
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}
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a_pos = glGetAttribLocation(program, "a_pos");
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a_offset = glGetAttribLocation(program, "a_offset");
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a_tex = glGetAttribLocation(program, "a_tex");
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a_angle = glGetAttribLocation(program, "a_angle");
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a_minzoom = glGetAttribLocation(program, "a_minzoom");
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a_maxzoom = glGetAttribLocation(program, "a_maxzoom");
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a_rangeend = glGetAttribLocation(program, "a_rangeend");
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a_rangestart = glGetAttribLocation(program, "a_rangestart");
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a_labelminzoom = glGetAttribLocation(program, "a_labelminzoom");
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}
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void SDFGlyphShader::bind(char *offset) {
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const int stride = 16;
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glEnableVertexAttribArray(a_pos);
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glVertexAttribPointer(a_pos, 2, GL_SHORT, false, stride, offset + 0);
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glEnableVertexAttribArray(a_offset);
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glVertexAttribPointer(a_offset, 2, GL_SHORT, false, stride, offset + 4);
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glEnableVertexAttribArray(a_labelminzoom);
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glVertexAttribPointer(a_labelminzoom, 1, GL_UNSIGNED_BYTE, false, stride, offset + 8);
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glEnableVertexAttribArray(a_minzoom);
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glVertexAttribPointer(a_minzoom, 1, GL_UNSIGNED_BYTE, false, stride, offset + 9);
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glEnableVertexAttribArray(a_maxzoom);
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glVertexAttribPointer(a_maxzoom, 1, GL_UNSIGNED_BYTE, false, stride, offset + 10);
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glEnableVertexAttribArray(a_angle);
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glVertexAttribPointer(a_angle, 1, GL_UNSIGNED_BYTE, false, stride, offset + 11);
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glEnableVertexAttribArray(a_rangeend);
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glVertexAttribPointer(a_rangeend, 1, GL_UNSIGNED_BYTE, false, stride, offset + 12);
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glEnableVertexAttribArray(a_rangestart);
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glVertexAttribPointer(a_rangestart, 1, GL_UNSIGNED_BYTE, false, stride, offset + 13);
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glEnableVertexAttribArray(a_tex);
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glVertexAttribPointer(a_tex, 2, GL_UNSIGNED_BYTE, false, stride, offset + 14);
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}
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void SDFIconShader::bind(char *offset) {
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const int stride = 20;
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glEnableVertexAttribArray(a_pos);
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glVertexAttribPointer(a_pos, 2, GL_SHORT, false, stride, offset + 0);
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glEnableVertexAttribArray(a_offset);
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glVertexAttribPointer(a_offset, 2, GL_SHORT, false, stride, offset + 4);
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glEnableVertexAttribArray(a_labelminzoom);
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glVertexAttribPointer(a_labelminzoom, 1, GL_UNSIGNED_BYTE, false, stride, offset + 8);
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glEnableVertexAttribArray(a_minzoom);
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glVertexAttribPointer(a_minzoom, 1, GL_UNSIGNED_BYTE, false, stride, offset + 9);
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glEnableVertexAttribArray(a_maxzoom);
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glVertexAttribPointer(a_maxzoom, 1, GL_UNSIGNED_BYTE, false, stride, offset + 10);
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glEnableVertexAttribArray(a_angle);
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glVertexAttribPointer(a_angle, 1, GL_UNSIGNED_BYTE, false, stride, offset + 11);
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glEnableVertexAttribArray(a_rangeend);
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glVertexAttribPointer(a_rangeend, 1, GL_UNSIGNED_BYTE, false, stride, offset + 12);
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glEnableVertexAttribArray(a_rangestart);
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glVertexAttribPointer(a_rangestart, 1, GL_UNSIGNED_BYTE, false, stride, offset + 13);
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glEnableVertexAttribArray(a_tex);
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glVertexAttribPointer(a_tex, 2, GL_SHORT, false, stride, offset + 16);
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}
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