private Bitmap MapColors(Bitmap palette, Bitmap celBitmap)
{
var resultBitmap = new Bitmap(celBitmap.Width, celBitmap.Height, PixelFormat.Format8bppIndexed);
var resultPalette = resultBitmap.Palette;
for (int i = 0; i < resultPalette.Entries.Length; i++)
{
resultPalette.Entries[i] = Color.FromArgb(0, 0, 0, 0);
}
if (_attached)
{
for (int i = 1; i < 16; i++) // 16 colors are allowed for attached sprites on the Amiga
{
resultPalette.Entries[i] = palette.Palette.Entries[i];
}
}
else
{
var spriteColorIndexOffset = (int.Parse(_definition.SpriteNumber) / 2) * 4;
for (int i = 1; i < 4; i++)
{
resultPalette.Entries[i] = palette.Palette.Entries[i + spriteColorIndexOffset];
}
}
var transformer = new IndexedTransformer(_definition.File, celBitmap, resultPalette);
return(transformer.ConvertToIndexed());
}
public static Bitmap LoadIndexedBitmap(this string fileName, ColorPalette palette = null)
{
Bitmap output;
if (BitmapCache.TryGetValue(fileName, out output))
{
return(output);
}
var bitmap = fileName.LoadBitmap();
if (palette == null)
{
if (!SupportedFormats.Contains(bitmap.PixelFormat))
{
throw new ConversionException("Only indexed formats are supported");
}
return(bitmap);
}
var transformer = new IndexedTransformer(fileName, bitmap, palette);
output = transformer.ConvertToIndexed();
BitmapCache.Add(fileName, output);
return(output);
}
