/* Shim functions */
public static byte[] Decompress(EndianBinaryReader reader, int width, int height, PixelDataFormat inputFormat, long readLength)
{
byte[] outPixels = new byte[readLength * 8];
PixelOrderingDelegate pixelOrderingFunc = ImageBinary.GetPixelOrderingFunction(inputFormat & PixelDataFormat.MaskPixelOrdering);
for (int y = 0; y < height; y += 4)
{
for (int x = 0; x < width; x += 4)
{
ushort[] decompressedBlock = new ushort[(4 * 4) * 4];
if ((inputFormat & PixelDataFormat.MaskSpecial) == PixelDataFormat.SpecialFormatBPTC_Float)
{
DecompressBlockBPTCFloatShared(reader, false, ref decompressedBlock);
}
else if ((inputFormat & PixelDataFormat.MaskSpecial) == PixelDataFormat.SpecialFormatBPTC_SignedFloat)
{
DecompressBlockBPTCFloatShared(reader, true, ref decompressedBlock);
}
else
{
throw new Exception("Trying to decode BPTC Float/SignedFloat with format set to non-BPTC");
}
int rx, ry;
pixelOrderingFunc(x / 4, y / 4, width / 4, height / 4, inputFormat, out rx, out ry);
rx *= 4; ry *= 4;
for (int py = 0; py < 4; py++)
{
for (int px = 0; px < 4; px++)
{
int ix = (rx + px);
int iy = (ry + py);
if (ix >= width || iy >= height)
{
continue;
}
for (int c = 0; c < 4; c++)
{
float value = Float16toFloat32(decompressedBlock[(((py * 4) + px) * 4) + c]);
outPixels[(((iy * width) + ix) * 4) + c] = (byte)(value * 255);
}
}
}
}
}
return(outPixels);
}
public static byte[] Decompress(EndianBinaryReader reader, int width, int height, PixelDataFormat inputFormat, long readLength)
{
byte[] outPixels = new byte[readLength * 8];
PixelOrderingDelegate pixelOrderingFunc = ImageBinary.GetPixelOrderingFunction(inputFormat & PixelDataFormat.MaskPixelOrdering);
DXTxRGTCBlockDecoderDelegate blockDecoder;
DXTxRGTCBlockLayout blockLayout;
DXTxRGTCSignedness signedness;
PixelDataFormat specialFormat = (inputFormat & PixelDataFormat.MaskSpecial);
switch (specialFormat)
{
case PixelDataFormat.SpecialFormatDXT1: blockDecoder = DecodeDXT1Block; blockLayout = DXTxRGTCBlockLayout.Normal; signedness = DXTxRGTCSignedness.Unsigned; break;
case PixelDataFormat.SpecialFormatDXT3: blockDecoder = DecodeDXT3Block; blockLayout = DXTxRGTCBlockLayout.Normal; signedness = DXTxRGTCSignedness.Unsigned; break;
case PixelDataFormat.SpecialFormatDXT5: blockDecoder = DecodeDXT5Block; blockLayout = DXTxRGTCBlockLayout.Normal; signedness = DXTxRGTCSignedness.Unsigned; break;
case PixelDataFormat.SpecialFormatRGTC1: blockDecoder = DecodeRGTC1Block; blockLayout = DXTxRGTCBlockLayout.Normal; signedness = DXTxRGTCSignedness.Unsigned; break;
case PixelDataFormat.SpecialFormatRGTC1_Signed: blockDecoder = DecodeRGTC1Block; blockLayout = DXTxRGTCBlockLayout.PSP; signedness = DXTxRGTCSignedness.Signed; break;
case PixelDataFormat.SpecialFormatRGTC2: blockDecoder = DecodeRGTC2Block; blockLayout = DXTxRGTCBlockLayout.Normal; signedness = DXTxRGTCSignedness.Unsigned; break;
case PixelDataFormat.SpecialFormatRGTC2_Signed: blockDecoder = DecodeRGTC2Block; blockLayout = DXTxRGTCBlockLayout.PSP; signedness = DXTxRGTCSignedness.Signed; break;
case PixelDataFormat.SpecialFormatDXT1_PSP: blockDecoder = DecodeDXT1Block; blockLayout = DXTxRGTCBlockLayout.PSP; signedness = DXTxRGTCSignedness.Unsigned; break;
case PixelDataFormat.SpecialFormatDXT3_PSP: blockDecoder = DecodeDXT3Block; blockLayout = DXTxRGTCBlockLayout.PSP; signedness = DXTxRGTCSignedness.Unsigned; break;
case PixelDataFormat.SpecialFormatDXT5_PSP: blockDecoder = DecodeDXT5Block; blockLayout = DXTxRGTCBlockLayout.PSP; signedness = DXTxRGTCSignedness.Unsigned; break;
default:
throw new Exception("Trying to decode DXT/RGTC with format set to non-DXT/RGTC");
}
for (int y = 0; y < height; y += 4)
{
for (int x = 0; x < width; x += 4)
{
byte[] decompressedBlock = blockDecoder(reader, inputFormat, blockLayout, signedness);
int rx, ry;
pixelOrderingFunc(x / 4, y / 4, width / 4, height / 4, inputFormat, out rx, out ry);
rx *= 4; ry *= 4;
for (int py = 0; py < 4; py++)
{
for (int px = 0; px < 4; px++)
{
int ix = (rx + px);
int iy = (ry + py);
if (ix >= width || iy >= height)
{
continue;
}
for (int c = 0; c < 4; c++)
{
outPixels[(((iy * width) + ix) * 4) + c] = decompressedBlock[(((py * 4) + px) * 4) + c];
}
}
}
}
}
return(outPixels);
}
