+ m_texture_prog.Use();
+ GraphicsBuffer quad_vertex_buffer;
+ quad_vertex_buffer.SetUsage(GraphicsBuffer::BufferUsageStaticDraw);
+ quad_vertex_buffer.SetType(GraphicsBuffer::BufferTypeVertex);
+ GLfloat quad[] = {
+ 0, 0, 0, 0,
+ 1, 0, (float)ViewportWidth(), 0,
+ 1, 1, (float)ViewportWidth(), (float)ViewportHeight(),
+ 0, 1, 0, (float)ViewportHeight()
+ };
+ quad_vertex_buffer.Upload(sizeof(GLfloat) * 16, quad);
+ quad_vertex_buffer.Bind();
+ m_viewport_ubo.Bind();
+
+ glUniform4f(m_colour_uniform_location, 1.0f, 1.0f, 1.0f, 1.0f);
+
+ GLuint texID;
+ glGenTextures(1, &texID);
+ glBindTexture(GL_TEXTURE_2D, texID);
+
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+
+ glTexImage2D(GL_TEXTURE_2D, 0, bmp->format->BytesPerPixel, w, h, 0, texture_format, GL_UNSIGNED_BYTE, bmp->pixels);
+
+ glEnableVertexAttribArray(0);
+ glEnableVertexAttribArray(1);
+ glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), (void*)(2*sizeof(float)));
+ glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), 0);
+ glDisableVertexAttribArray(1);
+ glDisableVertexAttribArray(0);
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+ SDL_FreeSurface(bmp);
+}
+
+void Screen::DebugFontInit(const char *name, float font_size)
+{
+ unsigned char font_atlas_data[1024*1024];
+ FILE *font_file = fopen(name, "rb");
+ fseek(font_file, 0, SEEK_END);
+ size_t font_file_size = ftell(font_file);
+ fseek(font_file, 0, SEEK_SET);
+ unsigned char *font_file_data = (unsigned char*)malloc(font_file_size);
+ SDL_assert(fread(font_file_data, 1, font_file_size, font_file) == font_file_size);
+ fclose(font_file);
+ stbtt_BakeFontBitmap(font_file_data,0, font_size, font_atlas_data,1024,1024, 32,96, m_debug_font_rects);
+ free(font_file_data);
+ glGenTextures(1, &m_debug_font_atlas);
+ glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, 1024,1024, 0, GL_RED, GL_UNSIGNED_BYTE, font_atlas_data);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ m_debug_font_size = font_size;
+
+ m_debug_font_vertices.SetUsage(GraphicsBuffer::BufferUsageStreamDraw);
+ m_debug_font_vertices.SetType(GraphicsBuffer::BufferTypeVertex);
+ m_debug_font_vertices.SetName("m_debug_font_vertices");
+ m_debug_font_vertices.Upload(8192,NULL);
+ m_debug_font_vertex_head = 0;
+
+ m_debug_font_indices.SetUsage(GraphicsBuffer::BufferUsageStreamDraw);
+ m_debug_font_indices.SetType(GraphicsBuffer::BufferTypeIndex);
+ m_debug_font_indices.SetName("m_debug_font_indices");
+ m_debug_font_indices.Resize(500);
+ m_debug_font_index_head = 0;
+}
+
+void Screen::DebugFontClear()
+{
+ m_debug_font_x = m_debug_font_y = 0;
+ if (!m_debug_font_atlas) return;
+ DebugFontPrint("\n");
+}
+
+void Screen::DebugFontFlush()
+{
+ glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 40, -1, "Screen::DebugFontFlush()");
+
+ glEnable(GL_BLEND);
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
+
+ m_font_prog.Use();
+ m_viewport_ubo.Bind();
+ m_debug_font_vertices.Bind();
+ m_debug_font_indices.Bind();
+ glUniform4f(m_colour_uniform_location, 0,0,0,1);
+ glEnableVertexAttribArray(0);
+ glEnableVertexAttribArray(1);
+ glEnable(GL_PRIMITIVE_RESTART);
+ glPrimitiveRestartIndex(65535);
+ glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), 0);
+ glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), (void*)(2*sizeof(float)));
+ glDrawElements(GL_TRIANGLE_STRIP, m_debug_font_index_head, GL_UNSIGNED_SHORT, 0);
+ glDisable(GL_PRIMITIVE_RESTART);
+ glDisableVertexAttribArray(1);
+ glDisableVertexAttribArray(0);