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#pragma once
#define STB_TRUETYPE_IMPLEMENTATION
#include "stb_truetype.h"
#include "../core.h"
#include "../math.h"
#include "../array/array.h"
#define BATCH_SIZE 2000
struct TextChar {
s64 lsb;
s64 advance;
Vec2 bbox0;
Vec2 bbox1;
Vec2 size;
};
struct TextState {
r32 scale;
u32 pixel_size;
s32 ascent;
s32 descent;
s32 linegap;
u32 texture_atlas_id;
u32 sp;
u32 vao;
u32 vbo;
u32 chunk_size;
IVec2 bbox0;
IVec2 bbox1;
stbtt_fontinfo font;
s32* char_indexes;
Mat4* transforms;
TextChar* char_map;
};
struct GLRenderer {
// colored quad
b8 cq_init;
u32 cq_sp;
u32 cq_vao;
// camera
Vec3 preset_up_dir;
Mat4 cam_proj;
// ui camera
b8 ui_cam_update;
Vec3 ui_cam_pos;
Vec3 ui_cam_look;
Mat4 ui_cam_view;
// game camera
b8 cam_update;
Vec3 cam_pos;
Vec3 cam_look;
Mat4 cam_view;
// Batched cq
// batching buffer
u32 cq_batch_sp;
u32 cq_batch_vao;
u32 cq_batch_vbo;
u32 cq_batch_count;
r32_array cq_pos_batch;
r32_array cq_color_batch;
// Batched line
u32 line_sp;
u32 line_vao;
u32 line_vbo;
u32 line_batch_count;
r32_array line_pos_batch;
r32_array line_color_batch;
// ui text
TextState ui_text;
};
u32 gl_shader_program(char *vs, char *fs);
u32 gl_shader_program_from_path(const char *vspath, const char *fspath);
// ==================== QUADS ====================
u32 gl_setup_colored_quad(u32 sp);
void gl_draw_colored_quad(
GLRenderer* renderer,
Vec3 position,
Vec2 size,
Vec3 color
);
// batched renderer
void gl_setup_colored_quad_optimized(
GLRenderer* renderer,
u32 sp
);
void gl_draw_colored_quad_optimized(
GLRenderer* renderer,
Vec3 position,
Vec2 size,
Vec3 color
);
void gl_cq_flush(GLRenderer *renderer);
// ==================== LINE ====================
void gl_setup_line(GLRenderer *renderer, u32 sp);
void gl_draw_line(
GLRenderer *renderer,
Vec3 start,
Vec3 end,
Vec3 color
);
void gl_line_flush(GLRenderer *renderer);
// ==================== FONT RENDERING ====================
void gl_setup_text(TextState *uistate);
void gl_render_text(GLRenderer *renderer,
char *text,
Vec2 position,
Vec3 color,
r32 font_size);
void gl_text_flush(GLRenderer *renderer, u32 render_count);
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