#ifndef TEXTURE_H
#define TEXTURE_H

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

#include "sokol_app.h"
#include "sokol/util/sokol_imgui.h"

#define TEX_SPEC 0
#define TEX_NORM 1
#define TEX_HEIGHT 2
#define TEX_DIFF 3

#define FILTER_NEAREST SG_FILTER_NEAREST
#define FILTER_NONE SG_FILTER_NONE
#define FILTER_LINEAR SG_FILTER_LINEAR

extern struct rect ST_UNIT;

/* Represents an actual texture on the GPU */
struct texture {
  sg_image id; /* ID reference for the GPU memory location of the texture */
  simgui_image_t simgui;
  int width;
  int height;
  unsigned char *data;
  int size;
  int gpusize;
  int frames;
  int *delays;
};

typedef struct texture texture;

typedef struct img_sampler{
  int wrap_u;
  int wrap_v;
  int wrap_w;
  int min_filter;
  int mag_filter;
  int mip_filter;
} img_sampler;

texture *texture_from_file(const char *path);
void texture_free(texture *tex);
struct texture *texture_fromdata(void *raw, long size);
texture *texture_empty(int width, int height, int n);
void texture_blit(texture *dest, texture *src, int x, int y, int w, int h);
void texture_flip(texture *tex, int y);
void texture_save(texture *tex, const char *file); // save the texture data to the given file

double perlin(double x, double y, double z);

#endif