static private byte[] convertToFormat(PixelFormat srcFormat, byte[] src, int w, int h, PixelFormat dstFormat, bool dxt1HasAlpha = false, byte dxt1Threshold = 128)
{
byte[] tempData;
switch (dstFormat)
{
case PixelFormat.DXT1:
case PixelFormat.DXT3:
case PixelFormat.DXT5:
case PixelFormat.ATI2:
tempData = convertRawToARGB(src, w, h, srcFormat);
if (dstFormat == PixelFormat.ATI2 && (w < 4 || h < 4))
{
tempData = new byte[MipMap.getBufferSize(w, h, dstFormat)];
}
else if (w < 4 || h < 4)
{
if (w < 4)
{
w = 4;
}
if (h < 4)
{
h = 4;
}
tempData = new byte[MipMap.getBufferSize(w, h, dstFormat)];
}
else
{
tempData = compressMipmap(dstFormat, tempData, w, h, dxt1HasAlpha, dxt1Threshold);
}
break;
case PixelFormat.ARGB:
tempData = convertRawToARGB(src, w, h, srcFormat);
break;
case PixelFormat.RGB:
tempData = convertRawToRGB(src, w, h, srcFormat);
break;
case PixelFormat.V8U8:
tempData = convertRawToARGB(src, w, h, srcFormat);
tempData = ARGBtoV8U8(tempData, w, h);
break;
case PixelFormat.G8:
tempData = convertRawToARGB(src, w, h, srcFormat);
tempData = ARGBtoG8(tempData, w, h);
break;
default:
throw new Exception("not supported format");
}
return(tempData);
}
public void StoreImageToDDS(Stream stream, PixelFormat format = PixelFormat.Unknown)
{
stream.WriteUInt32(DDS_TAG);
stream.WriteInt32(DDS_HEADER_dwSize);
stream.WriteUInt32(DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH | DDSD_MIPMAPCOUNT | DDSD_PIXELFORMAT | DDSD_LINEARSIZE);
stream.WriteInt32(mipMaps[0].height);
stream.WriteInt32(mipMaps[0].width);
int dataSize = 0;
for (int i = 0; i < mipMaps.Count; i++)
{
dataSize += MipMap.getBufferSize(mipMaps[i].width, mipMaps[i].height, format == PixelFormat.Unknown ? pixelFormat : format);
}
stream.WriteInt32(dataSize);
stream.WriteUInt32(0); // dwDepth
stream.WriteInt32(mipMaps.Count);
stream.WriteZeros(44); // dwReserved1
stream.WriteInt32(DDS_PIXELFORMAT_dwSize);
DDS_PF pixfmt = getDDSPixelFormat(format == PixelFormat.Unknown ? pixelFormat: format);
stream.WriteUInt32(pixfmt.flags);
stream.WriteUInt32(pixfmt.fourCC);
stream.WriteUInt32(pixfmt.bits);
stream.WriteUInt32(pixfmt.Rmask);
stream.WriteUInt32(pixfmt.Gmask);
stream.WriteUInt32(pixfmt.Bmask);
stream.WriteUInt32(pixfmt.Amask);
stream.WriteInt32(DDSCAPS_COMPLEX | DDSCAPS_MIPMAP | DDSCAPS_TEXTURE);
stream.WriteUInt32(0); // dwCaps2
stream.WriteUInt32(0); // dwCaps3
stream.WriteUInt32(0); // dwCaps4
stream.WriteUInt32(0); // dwReserved2
for (int i = 0; i < mipMaps.Count; i++)
{
stream.WriteFromBuffer(mipMaps[i].data);
}
}
public void correctMips(PixelFormat dstFormat, bool dxt1HasAlpha = false, byte dxt1Threshold = 128)
{
byte[] tempData;
if (pixelFormat != PixelFormat.ARGB)
{
tempData = convertRawToARGB(mipMaps[0].data, mipMaps[0].width, mipMaps[0].height, pixelFormat);
}
else
{
tempData = mipMaps[0].data;
}
int width = mipMaps[0].origWidth;
int height = mipMaps[0].origHeight;
if (mipMaps.Count > 1)
{
mipMaps.RemoveRange(1, mipMaps.Count - 1);
}
if (dstFormat != pixelFormat || (dstFormat == PixelFormat.DXT1 && !dxt1HasAlpha))
{
byte[] top = convertToFormat(PixelFormat.ARGB, tempData, width, height, dstFormat, dxt1HasAlpha, dxt1Threshold);
mipMaps.RemoveAt(0);
mipMaps.Add(new MipMap(top, width, height, dstFormat));
pixelFormat = dstFormat;
}
int prevW, prevH;
int origW = width;
int origH = height;
for (;;)
{
prevW = width;
prevH = height;
origW >>= 1;
origH >>= 1;
if (origW == 0 && origH == 0)
{
break;
}
if (origW == 0)
{
origW = 1;
}
if (origH == 0)
{
origH = 1;
}
width = origW;
height = origH;
if (pixelFormat == PixelFormat.ATI2 && (width < 4 || height < 4))
{
tempData = new byte[MipMap.getBufferSize(width, height, dstFormat)];
mipMaps.Add(new MipMap(tempData, width, height, pixelFormat));
continue;
}
if (pixelFormat == PixelFormat.DXT1 ||
pixelFormat == PixelFormat.DXT3 ||
pixelFormat == PixelFormat.DXT5)
{
if (width < 4 || height < 4)
{
if (width < 4)
{
width = 4;
}
if (height < 4)
{
height = 4;
}
tempData = new byte[MipMap.getBufferSize(width, height, dstFormat)];
mipMaps.Add(new MipMap(tempData, origW, origH, pixelFormat));
continue;
}
}
tempData = downscaleARGB(tempData, prevW, prevH);
if (pixelFormat != PixelFormat.ARGB)
{
byte[] converted = convertToFormat(PixelFormat.ARGB, tempData, origW, origH, pixelFormat, dxt1HasAlpha, dxt1Threshold);
mipMaps.Add(new MipMap(converted, origW, origH, pixelFormat));
}
else
{
mipMaps.Add(new MipMap(tempData, origW, origH, pixelFormat));
}
}
}
private void LoadImageDDS(MemoryStream stream, ImageFormat format)
{
if (stream.ReadUInt32() != DDS_TAG)
{
throw new Exception("not DDS tag");
}
if (stream.ReadInt32() != DDS_HEADER_dwSize)
{
throw new Exception("wrong DDS header dwSize");
}
DDSflags = stream.ReadUInt32();
int dwHeight = stream.ReadInt32();
int dwWidth = stream.ReadInt32();
if (!checkPowerOfTwo(dwWidth) ||
!checkPowerOfTwo(dwHeight))
{
throw new Exception("dimensions not power of two");
}
stream.Skip(8); // dwPitchOrLinearSize, dwDepth
int dwMipMapCount = stream.ReadInt32();
if (dwMipMapCount == 0)
{
dwMipMapCount = 1;
}
stream.Skip(11 * 4); // dwReserved1
stream.SkipInt32(); // ppf.dwSize
ddsPixelFormat.flags = stream.ReadUInt32();
ddsPixelFormat.fourCC = stream.ReadUInt32();
if ((ddsPixelFormat.flags & DDPF_FOURCC) != 0 && ddsPixelFormat.fourCC == FOURCC_DX10_TAG)
{
throw new Exception("DX10 DDS format not supported");
}
ddsPixelFormat.bits = stream.ReadUInt32();
ddsPixelFormat.Rmask = stream.ReadUInt32();
ddsPixelFormat.Gmask = stream.ReadUInt32();
ddsPixelFormat.Bmask = stream.ReadUInt32();
ddsPixelFormat.Amask = stream.ReadUInt32();
switch (ddsPixelFormat.fourCC)
{
case 0:
if (ddsPixelFormat.bits == 32 &&
(ddsPixelFormat.flags & DDPF_ALPHAPIXELS) != 0 &&
ddsPixelFormat.Rmask == 0xFF0000 &&
ddsPixelFormat.Gmask == 0xFF00 &&
ddsPixelFormat.Bmask == 0xFF &&
ddsPixelFormat.Amask == 0xFF000000)
{
pixelFormat = PixelFormat.ARGB;
break;
}
if (ddsPixelFormat.bits == 24 &&
ddsPixelFormat.Rmask == 0xFF0000 &&
ddsPixelFormat.Gmask == 0xFF00 &&
ddsPixelFormat.Bmask == 0xFF)
{
pixelFormat = PixelFormat.RGB;
break;
}
if (ddsPixelFormat.bits == 16 &&
ddsPixelFormat.Rmask == 0xFF &&
ddsPixelFormat.Gmask == 0xFF00 &&
ddsPixelFormat.Bmask == 0x00)
{
pixelFormat = PixelFormat.V8U8;
break;
}
if (ddsPixelFormat.bits == 8 &&
ddsPixelFormat.Rmask == 0xFF &&
ddsPixelFormat.Gmask == 0x00 &&
ddsPixelFormat.Bmask == 0x00)
{
pixelFormat = PixelFormat.G8;
break;
}
throw new Exception("Not supported DDS format");
case 21:
pixelFormat = PixelFormat.ARGB;
break;
case 20:
pixelFormat = PixelFormat.RGB;
break;
case 60:
pixelFormat = PixelFormat.V8U8;
break;
case 50:
pixelFormat = PixelFormat.G8;
break;
case FOURCC_DXT1_TAG:
pixelFormat = PixelFormat.DXT1;
break;
case FOURCC_DXT3_TAG:
pixelFormat = PixelFormat.DXT3;
break;
case FOURCC_DXT5_TAG:
pixelFormat = PixelFormat.DXT5;
break;
case FOURCC_ATI2_TAG:
pixelFormat = PixelFormat.ATI2;
break;
default:
throw new Exception("Not supported DDS format");
}
stream.Skip(5 * 4); // dwCaps, dwCaps2, dwCaps3, dwCaps4, dwReserved2
byte[] tempData;
for (int i = 0; i < dwMipMapCount; i++)
{
int w = dwWidth >> i;
int h = dwHeight >> i;
int origW = w;
int origH = h;
if (origW == 0 && origH != 0)
{
origW = 1;
}
if (origH == 0 && origW != 0)
{
origH = 1;
}
w = origW;
h = origH;
if (pixelFormat == PixelFormat.DXT1 ||
pixelFormat == PixelFormat.DXT3 ||
pixelFormat == PixelFormat.DXT5)
{
if (w < 4)
{
w = 4;
}
if (h < 4)
{
h = 4;
}
}
try
{
tempData = stream.ReadToBuffer(MipMap.getBufferSize(w, h, pixelFormat));
}
catch
{
throw new Exception("not enough data in stream");
}
mipMaps.Add(new MipMap(tempData, origW, origH, pixelFormat));
}
}