add LineBuffer and change DebugFontBuffer naming

src/geometry/debug_font_buffer.cpp

@@ -6,20 +6,20 @@
 
 using namespace llmr;
 
-debug_font_buffer::debug_font_buffer()
+DebugFontBuffer::DebugFontBuffer()
     : buffer(0),
       dirty(true) {
 
 }
 
-debug_font_buffer::~debug_font_buffer() {
+DebugFontBuffer::~DebugFontBuffer() {
     if (buffer != 0) {
         glDeleteBuffers(1, &buffer);
         buffer = 0;
     }
 }
 
-void debug_font_buffer::addText(const char *text, double left, double baseline, double scale) {
+void DebugFontBuffer::addText(const char *text, double left, double baseline, double scale) {
     int32_t length = strlen(text);
     for (int32_t i = 0; i < length; i++) {
         if (text[i] < 32 || text[i] > 127) {
@@ -52,24 +52,23 @@ void debug_font_buffer::addText(const char *text, double left, double baseline,
     dirty = true;
 }
 
-void debug_font_buffer::clear() {
+void DebugFontBuffer::clear() {
     array.clear();
     dirty = true;
 }
 
-uint32_t debug_font_buffer::length() {
+uint32_t DebugFontBuffer::length() {
     // We store 2 coordinates per vertex
     return array.size() / 2;
 }
 
-void debug_font_buffer::bind() {
+void DebugFontBuffer::bind() {
     if (buffer == 0) {
         glGenBuffers(1, &buffer);
-        glBindBuffer(GL_ARRAY_BUFFER, buffer);
-    } else {
-        glBindBuffer(GL_ARRAY_BUFFER, buffer);
     }
 
+    glBindBuffer(GL_ARRAY_BUFFER, buffer);
+
     if (dirty) {
         glBufferData(GL_ARRAY_BUFFER, array.size() * sizeof(uint16_t), array.data(), GL_STATIC_DRAW);
         dirty = false;