#ifndef MGL_TEXTURE_H
#define MGL_TEXTURE_H

#include "image.h"
#include <stdbool.h>

typedef struct mgl_texture mgl_texture;

typedef enum {
    MGL_TEXTURE_FORMAT_ALPHA,
    MGL_TEXTURE_FORMAT_GRAY,
    MGL_TEXTURE_FORMAT_GRAY_ALPHA,
    MGL_TEXTURE_FORMAT_RGB,
    MGL_TEXTURE_FORMAT_RGBA
} mgl_texture_format;

struct mgl_texture {
    unsigned int id;
    int width;
    int height;
    mgl_texture_format format;
    int max_width;
    int max_height;
    bool pixel_coordinates;
};

typedef struct {
    bool compressed; /* false by default */
    bool pixel_coordinates; /* false by default, texture coordinates are normalized */
} mgl_texture_load_options;

int mgl_texture_init(mgl_texture *self);
/* |load_options| can be null, in which case the default options are used */
int mgl_texture_load_from_file(mgl_texture *self, const char *filepath, mgl_texture_load_options *load_options);
/* |load_options| can be null, in which case the default options are used */
int mgl_texture_load_from_image(mgl_texture *self, const mgl_image *image, mgl_texture_load_options *load_options);
/* |load_options| can be null, in which case the default options are used */
int mgl_texture_load_from_memory(mgl_texture *self, const unsigned char *data, int width, int height, mgl_image_format format, mgl_texture_load_options *load_options);
int mgl_texture_update(mgl_texture *self, const unsigned char *data, int offset_x, int offset_y, int width, int height, mgl_image_format format);
/* |load_options| can be null, in which case the default options are used */
int mgl_texture_resize(mgl_texture *self, int new_width, int new_height, mgl_texture_load_options *load_options);
/* If |texture| is NULL then no texture is used */
void mgl_texture_use(const mgl_texture *texture);
const mgl_texture* mgl_texture_current_texture(void);
void mgl_texture_unload(mgl_texture *self);

#endif /* MGL_TEXTURE_H */