prosperon/source/engine/render.h

#ifndef OPENGL_RENDER_H
#define OPENGL_RENDER_H

#if defined __linux__
  #define SOKOL_GLCORE33
#elif __EMSCRIPTEN__
  #define SOKOL_GLES3
#elif __WIN32
  #define SOKOL_D3D11
#elif __APPLE__
  #define SOKOL_METAL
#endif

#include "sokol/sokol_gfx.h"
#include "HandmadeMath.h"
#include "gameobject.h"

#define RGBA_MAX 255

#include "window.h"

extern struct rgba color_white;
extern struct rgba color_black;
extern struct rgba color_clear;

extern int renderMode;

extern HMM_Vec3 dirl_pos;

extern HMM_Mat4 projection;
extern HMM_Mat4 hudproj;
extern HMM_Mat4 useproj;
extern sg_pass_action pass_action;

extern sg_buffer sprite_quad;
extern sg_sampler std_sampler;

struct draw_p {
  float x;
  float y;
};

struct draw_p3 {
  float x;
  float y;
  float z;
};

#include <chipmunk/chipmunk.h>

enum RenderMode {
    LIT,
    UNLIT,
    WIREFRAME,
    DIRSHADOWMAP,
    OBJECTPICKER
};

void render_init();
extern HMM_Vec2 campos;
extern float camzoom;

void openglRender(struct window *window, gameobject *cam, float zoom);
void opengl_rendermode(enum RenderMode r);

void openglInit3d(struct window *window);
void capture_screen(int x, int y, int w, int h, const char *path);

void gif_rec_start(int w, int h, int cpf, int bitdepth);
void gif_rec_end(const char *path);

struct uv_n {
  unsigned short u;
  unsigned short v;
};

struct st_n {
  struct uv_n s;
  struct uv_n t;
};

struct rgba {
  unsigned char r;
  unsigned char g;
  unsigned char b;
  unsigned char a;
};

typedef struct rgba rgba;

static inline rgba vec2rgba(HMM_Vec4 v) {
  return (rgba){v.e[0]*255,v.e[1]*255,v.e[2]*255,v.e[3]*255};
}

struct boundingbox {
  float t;
  float b;
  float r;
  float l;
};

struct rect {
  float x,y,w,h;
};
typedef struct rect rect;

struct boundingbox cwh2bb(HMM_Vec2 c, HMM_Vec2 wh);
float *rgba2floats(float *r, struct rgba c);
extern sg_blend_state blend_trans;

static inline float lerp(float f, float a, float b)
{
  return a * (1.0-f)+(b*f);
}

#endif