public void Load(Stream input)
{
BinaryReader reader = new BinaryReader(input);
//
// Read the DDS tag. If it's not right, then bail..
//
uint signature = reader.ReadUInt32();
if (signature != HeaderValues.DdsSignature)
{
throw new FormatException("File does not appear to be a DDS image");
}
header = new DdsHeader();
//
// Read everything in.. for now assume it worked like a charm..
//
header.Read(reader);
if ((header.PixelFormat.Flags & (int)PixelFormatFlags.FourCC) != 0)
{
SquishFlags squishFlags;
switch (header.PixelFormat.FourCC)
{
case FourCCFormat.Dxt1: {
squishFlags = SquishFlags.Dxt1;
break;
}
case FourCCFormat.Dxt3: {
squishFlags = SquishFlags.Dxt3;
break;
}
case FourCCFormat.Dxt5: {
squishFlags = SquishFlags.Dxt5;
break;
}
default: {
throw new FormatException("File is not a supported DDS format");
}
}
//
// Compute size of compressed block area
//
int blockCount = (Width + 3) / 4 * ((Height + 3) / 4);
int blockSize = (squishFlags & SquishFlags.Dxt1) != 0 ? 8 : 16;
//
// Allocate room for compressed blocks, and read data into it.
//
byte[] compressedBlocks = new byte[blockCount * blockSize];
input.Read(compressedBlocks, 0, compressedBlocks.GetLength(0));
//
// Now decompress..
//
largestMipMap = DdsSquish.DecompressImage(Width, Height, compressedBlocks, squishFlags, null);
}
else
{
//
// We can only deal with the non-DXT formats we know about.. this is a bit of a mess..
// Sorry..
//
FileFormat fileFormat = FileFormat.Unknown;
if ((header.PixelFormat.Flags == (int)PixelFormatFlags.RGBA) && (header.PixelFormat.RgbBitCount == 32) &&
(header.PixelFormat.RBitMask == 0x00ff0000) && (header.PixelFormat.GBitMask == 0x0000ff00) &&
(header.PixelFormat.BBitMask == 0x000000ff) && (header.PixelFormat.ABitMask == 0xff000000))
{
fileFormat = FileFormat.A8R8G8B8;
}
else if ((header.PixelFormat.Flags == (int)PixelFormatFlags.RGB) && (header.PixelFormat.RgbBitCount == 32) &&
(header.PixelFormat.RBitMask == 0x00ff0000) && (header.PixelFormat.GBitMask == 0x0000ff00) &&
(header.PixelFormat.BBitMask == 0x000000ff) && (header.PixelFormat.ABitMask == 0x00000000))
{
fileFormat = FileFormat.X8R8G8B8;
}
else if ((header.PixelFormat.Flags == (int)PixelFormatFlags.RGBA) && (header.PixelFormat.RgbBitCount == 32) &&
(header.PixelFormat.RBitMask == 0x000000ff) && (header.PixelFormat.GBitMask == 0x0000ff00) &&
(header.PixelFormat.BBitMask == 0x00ff0000) && (header.PixelFormat.ABitMask == 0xff000000))
{
fileFormat = FileFormat.A8B8G8R8;
}
else if ((header.PixelFormat.Flags == (int)PixelFormatFlags.RGB) && (header.PixelFormat.RgbBitCount == 32) &&
(header.PixelFormat.RBitMask == 0x000000ff) && (header.PixelFormat.GBitMask == 0x0000ff00) &&
(header.PixelFormat.BBitMask == 0x00ff0000) && (header.PixelFormat.ABitMask == 0x00000000))
{
fileFormat = FileFormat.X8B8G8R8;
}
else if ((header.PixelFormat.Flags == (int)PixelFormatFlags.RGBA) && (header.PixelFormat.RgbBitCount == 16) &&
(header.PixelFormat.RBitMask == 0x00007c00) && (header.PixelFormat.GBitMask == 0x000003e0) &&
(header.PixelFormat.BBitMask == 0x0000001f) && (header.PixelFormat.ABitMask == 0x00008000))
{
fileFormat = FileFormat.A1R5G5B5;
}
else if ((header.PixelFormat.Flags == (int)PixelFormatFlags.RGBA) && (header.PixelFormat.RgbBitCount == 16) &&
(header.PixelFormat.RBitMask == 0x00000f00) && (header.PixelFormat.GBitMask == 0x000000f0) &&
(header.PixelFormat.BBitMask == 0x0000000f) && (header.PixelFormat.ABitMask == 0x0000f000))
{
fileFormat = FileFormat.A4R4G4B4;
}
else if ((header.PixelFormat.Flags == (int)PixelFormatFlags.RGB) && (header.PixelFormat.RgbBitCount == 24) &&
(header.PixelFormat.RBitMask == 0x00ff0000) && (header.PixelFormat.GBitMask == 0x0000ff00) &&
(header.PixelFormat.BBitMask == 0x000000ff) && (header.PixelFormat.ABitMask == 0x00000000))
{
fileFormat = FileFormat.R8G8B8;
}
else if ((header.PixelFormat.Flags == (int)PixelFormatFlags.RGB) && (header.PixelFormat.RgbBitCount == 16) &&
(header.PixelFormat.RBitMask == 0x0000f800) && (header.PixelFormat.GBitMask == 0x000007e0) &&
(header.PixelFormat.BBitMask == 0x0000001f) && (header.PixelFormat.ABitMask == 0x00000000))
{
fileFormat = FileFormat.R5G6B5;
}
else if ((header.PixelFormat.Flags == (int)PixelFormatFlags.Gray) && (header.PixelFormat.RgbBitCount == 8) &&
(header.PixelFormat.RBitMask == 0x000000ff) && (header.PixelFormat.GBitMask == 0x00000000) &&
(header.PixelFormat.BBitMask == 0x00000000) && (header.PixelFormat.ABitMask == 0x00000000))
{
fileFormat = FileFormat.G8;
}
//
// If fileFormat is still invalid, then it's an unsupported format.
//
if (fileFormat == FileFormat.Unknown)
{
throw new FormatException("File is not a supported DDS format");
}
//
// Size of a source pixel, in bytes
//
int srcPixelSize = ((int)header.PixelFormat.RgbBitCount / 8);
//
// We need the pitch for a row, so we can allocate enough memory for the load.
//
int rowPitch;
if ((header.HeaderFlags & (int)HeaderFlags.Pitch) != 0)
{
//
// Pitch specified.. so we can use directly
//
rowPitch = (int)header.PitchOrLinearSize;
}
else if ((header.HeaderFlags & (int)HeaderFlags.LinearSize) != 0)
{
//
// Linear size specified.. compute row pitch. Of course, this should never happen
// as linear size is *supposed* to be for compressed textures. But Microsoft don't
// always play by the rules when it comes to DDS output.
//
rowPitch = (int)header.PitchOrLinearSize / (int)header.Height;
}
else
{
//
// Another case of Microsoft not obeying their standard is the 'Convert to..' shell extension
// that ships in the DirectX SDK. Seems to always leave flags empty..so no indication of pitch
// or linear size. And - to cap it all off - they leave pitchOrLinearSize as *zero*. Zero??? If
// we get this bizarre set of inputs, we just go 'screw it' and compute row pitch ourselves.
//
rowPitch = (int)header.Width * srcPixelSize;
}
//
// Ok.. now, we need to allocate room for the bytes to read in from.. it's rowPitch bytes * height
//
byte[] readPixelData = new byte[rowPitch * header.Height];
input.Read(readPixelData, 0, readPixelData.GetLength(0));
//
// We now need space for the real pixel data.. that's width * height * 4..
//
largestMipMap = new byte[header.Width * header.Height * 4];
//
// And now we have the arduous task of filling that up with stuff..
//
for (int destY = 0; destY < (int)header.Height; destY++)
{
for (int destX = 0; destX < (int)header.Width; destX++)
{
//
// Compute source pixel offset
//
int srcPixelOffset = destY * rowPitch + destX * srcPixelSize;
//
// Read our pixel
//
uint pixelColour = 0;
uint pixelRed = 0;
uint pixelGreen = 0;
uint pixelBlue = 0;
uint pixelAlpha = 0;
//
// Build our pixel colour as a DWORD
//
for (int loop = 0; loop < srcPixelSize; loop++)
{
pixelColour |= (uint)(readPixelData[srcPixelOffset + loop] << (8 * loop));
}
switch (fileFormat)
{
case FileFormat.A8R8G8B8: {
pixelAlpha = (pixelColour >> 24) & 0xff;
pixelRed = (pixelColour >> 16) & 0xff;
pixelGreen = (pixelColour >> 8) & 0xff;
pixelBlue = (pixelColour >> 0) & 0xff;
break;
}
case FileFormat.X8R8G8B8: {
pixelAlpha = 0xff;
pixelRed = (pixelColour >> 16) & 0xff;
pixelGreen = (pixelColour >> 8) & 0xff;
pixelBlue = (pixelColour >> 0) & 0xff;
break;
}
case FileFormat.A8B8G8R8: {
pixelAlpha = (pixelColour >> 24) & 0xff;
pixelRed = (pixelColour >> 0) & 0xff;
pixelGreen = (pixelColour >> 8) & 0xff;
pixelBlue = (pixelColour >> 16) & 0xff;
break;
}
case FileFormat.X8B8G8R8: {
pixelAlpha = 0xff;
pixelRed = (pixelColour >> 0) & 0xff;
pixelGreen = (pixelColour >> 8) & 0xff;
pixelBlue = (pixelColour >> 16) & 0xff;
break;
}
case FileFormat.A1R5G5B5: {
pixelAlpha = (pixelColour >> 15) & 0xff;
pixelRed = (pixelColour >> 10) & 0x1f;
pixelGreen = (pixelColour >> 5) & 0x1f;
pixelBlue = (pixelColour >> 0) & 0x1f;
pixelRed = (pixelRed << 3) | (pixelRed >> 2);
pixelGreen = (pixelGreen << 3) | (pixelGreen >> 2);
pixelBlue = (pixelBlue << 3) | (pixelBlue >> 2);
break;
}
case FileFormat.A4R4G4B4: {
pixelAlpha = (pixelColour >> 12) & 0xff;
pixelRed = (pixelColour >> 8) & 0x0f;
pixelGreen = (pixelColour >> 4) & 0x0f;
pixelBlue = (pixelColour >> 0) & 0x0f;
pixelAlpha = (pixelAlpha << 4) | (pixelAlpha >> 0);
pixelRed = (pixelRed << 4) | (pixelRed >> 0);
pixelGreen = (pixelGreen << 4) | (pixelGreen >> 0);
pixelBlue = (pixelBlue << 4) | (pixelBlue >> 0);
break;
}
case FileFormat.R8G8B8: {
pixelAlpha = 0xff;
pixelRed = (pixelColour >> 16) & 0xff;
pixelGreen = (pixelColour >> 8) & 0xff;
pixelBlue = (pixelColour >> 0) & 0xff;
break;
}
case FileFormat.R5G6B5: {
pixelAlpha = 0xff;
pixelRed = (pixelColour >> 11) & 0x1f;
pixelGreen = (pixelColour >> 5) & 0x3f;
pixelBlue = (pixelColour >> 0) & 0x1f;
pixelRed = (pixelRed << 3) | (pixelRed >> 2);
pixelGreen = (pixelGreen << 2) | (pixelGreen >> 4);
pixelBlue = (pixelBlue << 3) | (pixelBlue >> 2);
break;
}
case FileFormat.G8: {
pixelAlpha = 0xff;
pixelRed = pixelGreen = pixelBlue = pixelColour & 0xff;
break;
}
}
//
// Write the colours away..
//
int destPixelOffset = destY * (int)header.Width * 4 + destX * 4;
largestMipMap[destPixelOffset + 0] = (byte)pixelRed;
largestMipMap[destPixelOffset + 1] = (byte)pixelGreen;
largestMipMap[destPixelOffset + 2] = (byte)pixelBlue;
largestMipMap[destPixelOffset + 3] = (byte)pixelAlpha;
}
}
}
MipMaps = new List <DdsMipMap> {
new DdsMipMap(Width, Height, largestMipMap)
};
}
public byte[] WriteMipMap(DdsMipMap mipMap, DdsSaveConfig saveConfig)
{
byte[] outputData;
if (saveConfig.FileFormat >= FileFormat.DXT1 && saveConfig.FileFormat <= FileFormat.DXT5)
{
outputData = DdsSquish.CompressImage(mipMap.MipMap, mipMap.Width, mipMap.Height, saveConfig.GetSquishFlags(), null);
}
else
{
int pixelWidth = (int)header.PitchOrLinearSize / Width;
int mipPitch = pixelWidth * mipMap.Width;
outputData = new byte[mipPitch * mipMap.Height];
outputData.Initialize();
for (int i = 0; i < mipMap.MipMap.Length; i += 4)
{
uint pixelData = 0;
byte R = mipMap.MipMap[i + 0];
byte G = mipMap.MipMap[i + 1];
byte B = mipMap.MipMap[i + 2];
byte A = mipMap.MipMap[i + 3];
switch (saveConfig.FileFormat)
{
case FileFormat.A8R8G8B8: {
pixelData = ((uint)A << 24) |
((uint)R << 16) |
((uint)G << 8) |
((uint)B << 0);
break;
}
case FileFormat.X8R8G8B8: {
pixelData = ((uint)R << 16) |
((uint)G << 8) |
((uint)B << 0);
break;
}
case FileFormat.A8B8G8R8: {
pixelData = ((uint)A << 24) |
((uint)B << 16) |
((uint)G << 8) |
((uint)R << 0);
break;
}
case FileFormat.X8B8G8R8: {
pixelData = ((uint)B << 16) |
((uint)G << 8) |
((uint)R << 0);
break;
}
case FileFormat.A1R5G5B5: {
pixelData = ((uint)(A != 0 ? 1 : 0) << 15) |
((uint)(R >> 3) << 10) |
((uint)(G >> 3) << 5) |
((uint)(B >> 3) << 0);
break;
}
case FileFormat.A4R4G4B4: {
pixelData = ((uint)(A >> 4) << 12) |
((uint)(R >> 4) << 8) |
((uint)(G >> 4) << 4) |
((uint)(B >> 4) << 0);
break;
}
case FileFormat.R8G8B8: {
pixelData = ((uint)R << 16) |
((uint)G << 8) |
((uint)B << 0);
break;
}
case FileFormat.R5G6B5: {
pixelData = ((uint)(R >> 3) << 11) |
((uint)(G >> 2) << 5) |
((uint)(B >> 3) << 0);
break;
}
case FileFormat.G8: {
pixelData = (uint)((R + G + B) / 3.0 + 0.5);
break;
}
}
int pixelOffset = i / 4 * pixelWidth;
for (int j = 0; j < pixelWidth; j++)
{
outputData[pixelOffset + j] = (byte)((pixelData >> (8 * j)) & 0xff);
}
}
}
return(outputData);
}
