/**
 * Copyright (c) 2026 Dominic Masters
 * 
 * This software is released under the MIT License.
 * https://opensource.org/licenses/MIT
 */

#include "texture.h"
#include "assert/assert.h"
#include "util/memory.h"
#include "util/math.h"
#include "display/display.h"

texture_t TEXTURE_WHITE;
color_t TEXTURE_WHITE_PIXELS[4*4] = {
  COLOR_WHITE, COLOR_WHITE, COLOR_WHITE, COLOR_WHITE,
  COLOR_WHITE, COLOR_WHITE, COLOR_WHITE, COLOR_WHITE,
  COLOR_WHITE, COLOR_WHITE, COLOR_WHITE, COLOR_WHITE,
  COLOR_WHITE, COLOR_WHITE, COLOR_WHITE, COLOR_WHITE,
};

texture_t TEXTURE_TEST;
color_t TEXTURE_TEST_PIXELS[4*4] = {
  COLOR_BLACK, COLOR_MAGENTA, COLOR_BLACK, COLOR_MAGENTA,
  COLOR_MAGENTA, COLOR_BLACK, COLOR_MAGENTA, COLOR_BLACK,
  COLOR_BLACK, COLOR_MAGENTA, COLOR_BLACK, COLOR_MAGENTA,
  COLOR_MAGENTA, COLOR_BLACK, COLOR_MAGENTA, COLOR_BLACK,
};

errorret_t textureInit(
  texture_t *texture,
  const int32_t width,
  const int32_t height,
  const textureformat_t format,
  const texturedata_t data
) {
  assertNotNull(texture, "Texture cannot be NULL");
  assertTrue(width > 0 && height > 0, "width/height must be greater than 0");
  assertTrue(width == mathNextPowTwo(width), "Width must be a power of 2.");
  assertTrue(height == mathNextPowTwo(height), "Height must be a power of 2.");

  if(texture->format == TEXTURE_FORMAT_RGBA) {
    assertNotNull(data.rgbaColors, "RGBA color data cannot be NULL");
  } else if(texture->format == TEXTURE_FORMAT_PALETTE) {
    assertNotNull(data.paletted.indices, "Palette indices cannot be NULL");
    assertNotNull(data.paletted.palette, "Palette colors cannot be NULL");
    assertTrue(
      data.paletted.palette->count ==
      mathNextPowTwo(data.paletted.palette->count),
      "Palette color count must be a power of 2"
    );
  }

  memoryZero(texture, sizeof(texture_t));
  texture->width = width;
  texture->height = height;
  texture->format = format;

  errorChain(textureInitPlatform(texture, width, height, format, data));
  errorOk();
}

errorret_t textureDispose(texture_t *texture) {
  assertNotNull(texture, "Texture cannot be NULL");

  errorChain(textureDisposePlatform(texture));
  errorOk();
}