private unsafe void Decode_COMPRESSED_DXT3()
{
var Colors = new OutputPixel[4];
for (int y = 0, ni = 0; y < Height; y += 4)
{
for (int x = 0; x < Width; x += 4, ni++)
{
var Block = ((Dxt3Block*)InputByte)[ni];
Colors[0] = Decode_RGBA_5650_Pixel(Block.Color0).Transform((R, G, B, A) => OutputPixel.FromRGBA(B, G, R, A));
Colors[1] = Decode_RGBA_5650_Pixel(Block.Color1).Transform((R, G, B, A) => OutputPixel.FromRGBA(B, G, R, A));
Colors[2] = OutputPixel.OperationPerComponent(Colors[0], Colors[1], (a, b) => { return (byte)(((a * 2) / 3) + ((b * 1) / 3)); });
Colors[3] = OutputPixel.OperationPerComponent(Colors[0], Colors[1], (a, b) => { return (byte)(((a * 1) / 3) + ((b * 2) / 3)); });
for (int y2 = 0, no = 0; y2 < 4; y2++)
{
for (int x2 = 0; x2 < 4; x2++, no++)
{
var Alpha = ((Block.Alpha >> (4 * no)) & 0xF);
var Color = ((Block.ColorLookup >> (2 * no)) & 0x3);
int rx = (x + x2);
int ry = (y + y2);
int n = ry * Width + rx;
Output[n] = Colors[Color];
Output[n].A = (byte)((Alpha * 0xFF) / 0xF);
}
}
}
}
}
static public void Decode(GuPixelFormats PixelFormat, void *Input, OutputPixel *Output, int Width, int Height, void *Palette = null, GuPixelFormats PaletteType = GuPixelFormats.NONE, int PaletteCount = 0, int PaletteStart = 0, int PaletteShift = 0, int PaletteMask = 0xFF, int StrideWidth = -1)
{
if (StrideWidth == -1)
{
StrideWidth = GetPixelsSize(PixelFormat, Width);
}
var PixelFormatInt = (int)PixelFormat;
var PixelFormatDecoder = new PixelFormatDecoder()
{
_Input = Input,
InputByte = (byte *)Input,
InputShort = (ushort *)Input,
InputInt = (uint *)Input,
Output = Output,
StrideWidth = StrideWidth,
Width = Width,
Height = Height,
Palette = Palette,
PaletteType = PaletteType,
PaletteCount = PaletteCount,
PaletteStart = PaletteStart,
PaletteShift = PaletteShift,
PaletteMask = PaletteMask,
};
//Console.WriteLine(PixelFormat);
switch (PixelFormat)
{
case GuPixelFormats.RGBA_5650: PixelFormatDecoder.Decode_RGBA_5650(); break;
case GuPixelFormats.RGBA_5551: PixelFormatDecoder.Decode_RGBA_5551(); break;
case GuPixelFormats.RGBA_4444: PixelFormatDecoder.Decode_RGBA_4444(); break;
case GuPixelFormats.RGBA_8888: PixelFormatDecoder.Decode_RGBA_8888(); break;
case GuPixelFormats.PALETTE_T4: PixelFormatDecoder.Decode_PALETTE_T4(); break;
case GuPixelFormats.PALETTE_T8: PixelFormatDecoder.Decode_PALETTE_T8(); break;
case GuPixelFormats.PALETTE_T16: PixelFormatDecoder.Decode_PALETTE_T16(); break;
case GuPixelFormats.PALETTE_T32: PixelFormatDecoder.Decode_PALETTE_T32(); break;
case GuPixelFormats.COMPRESSED_DXT1: PixelFormatDecoder.Decode_COMPRESSED_DXT1(); break;
case GuPixelFormats.COMPRESSED_DXT3: PixelFormatDecoder.Decode_COMPRESSED_DXT3(); break;
case GuPixelFormats.COMPRESSED_DXT5: PixelFormatDecoder.Decode_COMPRESSED_DXT5(); break;
default: throw(new InvalidOperationException());
}
//DecoderCallbackTable[PixelFormatInt](Input, Output, PixelCount, Width, Palette, PaletteType, PaletteCount, PaletteStart, PaletteShift, PaletteMask);
}
