/**
 * Copyright (c) 2025 Dominic Masters
 * 
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */

#pragma once
#include "display/color.h"
#include "display/displaydefs.h"

typedef enum {
  #if DISPLAY_SDL2
    TEXTURE_FORMAT_RGBA = GL_RGBA,
    TEXTURE_FORMAT_ALPHA = GL_ALPHA,
    TEXTURE_FORMAT_PALETTE = GL_COLOR_INDEX8_EXT,
  #endif
} textureformat_t;

typedef struct {
  #if DISPLAY_SDL2
    GLuint id;
  #endif

  int32_t width;
  int32_t height;
} texture_t;

typedef union {
  struct {
    color_t *colors;
  } rgba;

  struct {
    uint8_t palette;
    uint8_t *data;
  } palette;

  struct {
    uint8_t *data;
  } alpha;
} texturedata_t;

extern const texture_t *TEXTURE_BOUND;

/**
 * Initializes a texture.
 * 
 * @param texture The texture to initialize.
 * @param width The width of the texture.
 * @param height The height of the texture.
 * @param format The format of the texture (e.g., GL_RGBA, GL_ALPHA).
 * @param data The data for the texture, the format changes per format.
 */
void textureInit(
  texture_t *texture,
  const int32_t width,
  const int32_t height,
  const textureformat_t format,
  const texturedata_t data
);

/**
 * Binds a texture for rendering. Providing NULL will unbind any texture.
 * 
 * @param texture The texture to bind.
 */
void textureBind(const texture_t *texture);

/**
 * Disposes a texture.
 * 
 * @param texture The texture to dispose.
 */
void textureDispose(texture_t *texture);