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struct Gl_Render_Rect {
u32 vertex_array;
u32 vertex_buffer;
u32 shader;
};
struct Gl_Render_Font {
u32 vertex_array;
u32 vertex_buffer;
u32 index_buffer;
u32 texture;
u32 shader;
stbtt_bakedchar baked_chars[96];
};
class Gl_Renderer : public Renderer {
private:
Gl_Render_Rect m_render_rect;
Gl_Render_Font m_render_font;
f32 m_projection_stbtt[4][4];
f32 m_projection[4][4];
i32 m_width;
i32 m_height;
public:
Gl_Renderer();
public:
bool init(f32 font_size, u8 *ttf_buff, const char *font_vs, const char *font_fs, const char *rect_vs, const char *rect_fs);
void viewport(i32 x, i32 y, i32 width, i32 height) override;
void draw_background(V3 color) override;
void draw_rect(Rect rect, V3 color) override;
void draw_text(const char *text, f32 x, f32 y) override;
private:
bool get_functions();
bool init_text_drawing(u8 *ttf_buff, const char *vs_src, const char *fs_src, f32 font_size);
bool init_rect_drawing(const char *vs_src, const char *fs_src);
bool create_shader(u32 *shader, const char *vs_src, const char *fs_src);
bool compile_shader(u32 *id, const char *src, GLenum type);
// updates
void ortho(f32 mat44[4][4], f32 x0, f32 y0, f32 x1, f32 y1, f32 z0, f32 z1);
};
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