static IEnumerable <Color> GetColorsFromTexture(byte[] tex, ImageSettings settings)
{
var format = settings.Format;
using (var br = new BinaryReaderX(new MemoryStream(tex)))
{
var etc1decoder = new ETC1.Decoder();
Enum.TryParse <DXT.Formats>(format.ToString(), false, out var dxtFormat);
var dxtdecoder = new DXT.Decoder(dxtFormat);
Enum.TryParse <ATI.Formats>(format.ToString(), false, out var atiFormat);
var atidecoder = new ATI.Decoder(atiFormat);
while (true)
{
int a = 255, r = 255, g = 255, b = 255;
switch (format)
{
case Format.L8:
b = g = r = br.ReadByte();
break;
case Format.A8:
a = br.ReadByte();
break;
case Format.LA44:
a = br.ReadNibble() * 17;
b = g = r = br.ReadNibble() * 17;
break;
case Format.LA88:
if (settings.ByteOrder == ByteOrder.LittleEndian)
{
a = br.ReadByte();
b = g = r = br.ReadByte();
}
else
{
b = g = r = br.ReadByte();
a = br.ReadByte();
}
break;
case Format.HL88:
g = br.ReadByte();
r = br.ReadByte();
break;
case Format.RGB565:
var s = br.ReadUInt16();
b = (s % 32) * 33 / 4;
g = (s >> 5) % 64 * 65 / 16;
r = (s >> 11) * 33 / 4;
break;
case Format.RGB888:
b = br.ReadByte();
g = br.ReadByte();
r = br.ReadByte();
break;
case Format.RGBA5551:
var s2 = br.ReadUInt16();
a = (s2 & 1) * 255;
b = (s2 >> 1) % 32 * 33 / 4;
g = (s2 >> 6) % 32 * 33 / 4;
r = (s2 >> 11) % 32 * 33 / 4;
break;
case Format.RGBA4444:
a = br.ReadNibble() * 17;
b = br.ReadNibble() * 17;
g = br.ReadNibble() * 17;
r = br.ReadNibble() * 17;
break;
case Format.RGBA8888:
if (settings.ByteOrder == ByteOrder.LittleEndian)
{
a = br.ReadByte();
b = br.ReadByte();
g = br.ReadByte();
r = br.ReadByte();
}
else
{
r = br.ReadByte();
g = br.ReadByte();
b = br.ReadByte();
a = br.ReadByte();
}
break;
case Format.RGBA1010102:
var pack = br.ReadUInt32();
r = (int)((pack >> 22) / 4);
g = (int)(((pack >> 12) & 0x3FF) / 4);
b = (int)(((pack >> 2) & 0x3FF) / 4);
a = (int)((pack & 0x3) * 85);
break;
case Format.ETC1:
case Format.ETC1A4:
yield return(etc1decoder.Get(() =>
{
var etc1Alpha = format == Format.ETC1A4 ? br.ReadUInt64() : ulong.MaxValue;
return new ETC1.PixelData {
Alpha = etc1Alpha, Block = br.ReadStruct <ETC1.Block>()
};
}));
continue;
case Format.DXT1:
case Format.DXT3:
case Format.DXT5:
yield return(dxtdecoder.Get(() =>
{
if (br.BaseStream.Position == br.BaseStream.Length)
{
return (0, 0);
}
var dxt5Alpha = format == Format.DXT3 || format == Format.DXT5 ? br.ReadUInt64() : 0;
return (dxt5Alpha, br.ReadUInt64());
}));
continue;
case Format.ATI1L:
case Format.ATI1A:
case Format.ATI2:
yield return(atidecoder.Get(() =>
{
if (br.BaseStream.Position == br.BaseStream.Length)
{
return (0, 0);
}
return (br.ReadUInt64(), format == Format.ATI2 ? br.ReadUInt64() : 0);
}));
continue;
case Format.L4:
b = g = r = br.ReadNibble() * 17;
break;
case Format.A4:
a = br.ReadNibble() * 17;
break;
case Format.PVRTC:
var bmp = PVRTC.PvrtcDecompress.DecodeRgb4Bpp(tex, settings.Width);
for (int y = 0; y < settings.Height; y++)
{
for (int x = 0; x < settings.Width; x++)
{
yield return(bmp.GetPixel(x, y));
}
}
continue;
case Format.PVRTCA:
bmp = PVRTC.PvrtcDecompress.DecodeRgba4Bpp(tex, settings.Width);
for (int y = 0; y < settings.Height; y++)
{
for (int x = 0; x < settings.Width; x++)
{
yield return(bmp.GetPixel(x, y));
}
}
continue;
default:
throw new NotSupportedException($"Unknown image format {format}");
}
yield return(Color.FromArgb(a, r, g, b));
}
}
}
static IEnumerable <Color> GetColorsFromTexture(byte[] tex, Format format)
{
using (var br = new BinaryReaderX(new MemoryStream(tex)))
{
var etc1decoder = new ETC1.Decoder();
Enum.TryParse <DXT.Formats>(format.ToString(), false, out var dxtFormat);
var dxtdecoder = new DXT.Decoder(dxtFormat);
while (true)
{
int a = 255, r = 255, g = 255, b = 255;
switch (format)
{
case Format.L8:
b = g = r = br.ReadByte();
break;
case Format.A8:
a = br.ReadByte();
break;
case Format.LA44:
a = br.ReadNibble() * 17;
b = g = r = br.ReadNibble() * 17;
break;
case Format.LA88:
a = br.ReadByte();
b = g = r = br.ReadByte();
break;
case Format.HL88:
g = br.ReadByte();
r = br.ReadByte();
break;
case Format.RGB565:
var s = br.ReadUInt16();
b = (s % 32) * 33 / 4;
g = (s >> 5) % 64 * 65 / 16;
r = (s >> 11) * 33 / 4;
break;
case Format.RGB888:
b = br.ReadByte();
g = br.ReadByte();
r = br.ReadByte();
break;
case Format.RGBA5551:
var s2 = br.ReadUInt16();
a = (s2 & 1) * 255;
b = (s2 >> 1) % 32 * 33 / 4;
g = (s2 >> 6) % 32 * 33 / 4;
r = (s2 >> 11) % 32 * 33 / 4;
break;
case Format.RGBA4444:
a = br.ReadNibble() * 17;
b = br.ReadNibble() * 17;
g = br.ReadNibble() * 17;
r = br.ReadNibble() * 17;
break;
case Format.RGBA8888:
a = br.ReadByte();
b = br.ReadByte();
g = br.ReadByte();
r = br.ReadByte();
break;
case Format.ETC1:
case Format.ETC1A4:
yield return(etc1decoder.Get(() =>
{
var etc1Alpha = format == Format.ETC1A4 ? br.ReadUInt64() : ulong.MaxValue;
return new ETC1.PixelData {
Alpha = etc1Alpha, Block = br.ReadStruct <ETC1.Block>()
};
}));
continue;
case Format.DXT1:
case Format.DXT3:
case Format.DXT5:
yield return(dxtdecoder.Get(() =>
{
if (br.BaseStream.Position == br.BaseStream.Length)
{
return (0, 0);
}
var dxt5Alpha = format == Format.DXT3 || format == Format.DXT5 ? br.ReadUInt64() : 0;
return (dxt5Alpha, br.ReadUInt64());
}));
continue;
case Format.L4:
b = g = r = br.ReadNibble() * 17;
break;
case Format.A4:
a = br.ReadNibble() * 17;
break;
default:
throw new NotSupportedException($"Unknown image format {format}");
}
yield return(Color.FromArgb(a, r, g, b));
}
}
}