public TgvFile ReadDDS(byte[] input)
{
int contentSize = input.Length - Marshal.SizeOf(typeof(DDS.DDS.Header)) - Marshal.SizeOf((typeof(uint)));
var file = new TgvFile();
using (var ms = new MemoryStream(input))
{
var buffer = new byte[4];
ms.Read(buffer, 0, buffer.Length);
if (BitConverter.ToUInt32(buffer, 0) != DDS.DDS.MagicHeader)
{
throw new ArgumentException("Wrong DDS magic");
}
buffer = new byte[Marshal.SizeOf(typeof(DDS.DDS.Header))];
ms.Read(buffer, 0, buffer.Length);
var header = Utils.ByteArrayToStructure <DDS.DDS.Header>(buffer);
int mipSize = contentSize;
if (header.MipMapCount == 0)
{
header.MipMapCount = 1;
}
else
{
mipSize -= contentSize / header.MipMapCount;
}
for (ushort i = 0; i < header.MipMapCount; i++)
{
buffer = new byte[mipSize];
ms.Read(buffer, 0, buffer.Length);
var mip = new TgvMipMap {
Content = buffer
};
file.MipMaps.Add(mip);
mipSize /= 4;
}
file.Height = header.Height;
file.ImageHeight = header.Height;
file.Width = header.Width;
file.ImageWidth = header.Width;
file.MipMapCount = (ushort)header.MipMapCount;
DDSHelper.ConversionFlags conversionFlags;
file.Format = DDSHelper.GetDXGIFormat(ref header.PixelFormat, out conversionFlags);
}
return(file);
}
private static unsafe byte[] DecompressRGBA(DDSStruct header, byte[] data, DDSPixelFormat pixelFormat)
{
// allocate bitmap
int bpp = (int)(DDSHelper.PixelFormatToBpp(pixelFormat, header.pixelformat.rgbbitcount));
int bps = (int)(header.width * bpp * DDSHelper.PixelFormatToBpc(pixelFormat));
int sizeofplane = (int)(bps * header.height);
int width = (int)header.width;
int height = (int)header.height;
int depth = (int)header.depth;
byte[] rawData = new byte[depth * sizeofplane + height * bps + width * bpp];
uint valMask = (uint)((header.pixelformat.rgbbitcount == 32) ? ~0 : (1 << (int)header.pixelformat.rgbbitcount) - 1);
// Funny x86s, make 1 << 32 == 1
uint pixSize = (header.pixelformat.rgbbitcount + 7) / 8;
int rShift1 = 0; int rMul = 0; int rShift2 = 0;
DDSHelper.ComputeMaskParams(header.pixelformat.rbitmask, ref rShift1, ref rMul, ref rShift2);
int gShift1 = 0; int gMul = 0; int gShift2 = 0;
DDSHelper.ComputeMaskParams(header.pixelformat.gbitmask, ref gShift1, ref gMul, ref gShift2);
int bShift1 = 0; int bMul = 0; int bShift2 = 0;
DDSHelper.ComputeMaskParams(header.pixelformat.bbitmask, ref bShift1, ref bMul, ref bShift2);
int aShift1 = 0; int aMul = 0; int aShift2 = 0;
DDSHelper.ComputeMaskParams(header.pixelformat.alphabitmask, ref aShift1, ref aMul, ref aShift2);
int offset = 0;
int pixnum = width * height * depth;
fixed(byte *bytePtr = data)
{
byte *temp = bytePtr;
while (pixnum-- > 0)
{
uint px = *((uint *)temp) & valMask;
temp += pixSize;
uint pxc = px & header.pixelformat.rbitmask;
rawData[offset + 0] = (byte)(((pxc >> rShift1) * rMul) >> rShift2);
pxc = px & header.pixelformat.gbitmask;
rawData[offset + 1] = (byte)(((pxc >> gShift1) * gMul) >> gShift2);
pxc = px & header.pixelformat.bbitmask;
rawData[offset + 2] = (byte)(((pxc >> bShift1) * bMul) >> bShift2);
pxc = px & header.pixelformat.alphabitmask;
rawData[offset + 3] = (byte)(((pxc >> aShift1) * aMul) >> aShift2);
offset += 4;
}
}
return(rawData);
}
/// <summary>
///
/// </summary>
/// <param name="filePath"></param>
/// <returns></returns>
/// <remarks>
/// Credits to enohka for this code.
/// See more at: http://github.com/enohka/moddingSuite
/// </remarks>
public virtual TgvImage Read(String filePath)
{
var file = new TgvImage();
byte[] rawDDSData = File.ReadAllBytes(filePath);
using (var ms = new MemoryStream(rawDDSData))
{
var buffer = new byte[4];
ms.Read(buffer, 0, buffer.Length);
if (BitConverter.ToUInt32(buffer, 0) != DDSFormat.MagicHeader)
{
throw new ArgumentException("Wrong DDS magic");
}
buffer = new byte[Marshal.SizeOf(typeof(DDSFormat.Header))];
ms.Read(buffer, 0, buffer.Length);
var header = MiscUtilities.ByteArrayToStructure <DDSFormat.Header>(buffer);
header.MipMapCount = 1;
DDSHelper.ConversionFlags conversionFlags;
var format = DDSHelper.GetDXGIFormat(ref header.PixelFormat, out conversionFlags);
//read only the main content mipmap
uint minMipByteLength = DDSMipMapUilities.GetMinimumMipMapSizeForFormat(header.PixelFormat);
uint mipByteLength = (uint)DDSMipMapUilities.GetMipMapBytesCount((int)header.Width, (int)header.Height, format);
mipByteLength = Math.Max(minMipByteLength, mipByteLength);
buffer = new byte[mipByteLength];
ms.Read(buffer, 0, buffer.Length);
var mip = new TgvMipMap();
mip.Content = buffer;
mip.Length = mipByteLength;
mip.MipSize = header.Width * header.Height;
mip.MipWidth = header.Width;
mip.MipHeight = header.Height;
file.MipMapCount = (ushort)header.MipMapCount;
file.MipMaps.Add(mip);
file.Height = header.Height;
file.ImageHeight = header.Height;
file.Width = header.Width;
file.ImageWidth = header.Width;
file.Format = format;
file.PixelFormatString = TgvUtilities.GetTgvFromPixelFormat(format);
}
return(file);
}
private static byte[] DecompressDXT4(DDSStruct header, byte[] data, DDSPixelFormat pixelFormat)
{
// allocate bitmap
int width = (int)header.width;
int height = (int)header.height;
int depth = (int)header.depth;
// Can do color & alpha same as dxt5, but color is pre-multiplied
// so the result will be wrong unless corrected.
byte[] rawData = DecompressDXT5(header, data, pixelFormat);
DDSHelper.CorrectPremult((uint)(width * height * depth), ref rawData);
return(rawData);
}
public static Texture FromFile(string path)
{
// Set up the texture fire
Texture tex = new Texture();
// Just trust the file extension for now
string ext = Path.GetExtension(path);
// DDS files are a special case, as there's no built in support for loading them
// Because of this, we'll need to parse the file manually
if (ext.Equals(".dds"))
{
DDSHelper dds = DDSHelper.FromFile(path);
tex.Width = (ushort)dds.ddsFile.Header.Width;
tex.Height = (ushort)dds.ddsFile.Header.Height;
tex.Depth = (ushort)dds.ddsFile.Header.Width;
// FIX THIS WHEN NOT LAZY
tex.Flags = (ushort)Descriptor.DXT1;
tex.MipMapCount = (byte)dds.ddsFile.Header.MipMapCount;
// Not finished...
}
// Otherwise just let GDI+ handle it and the conversion
// We'll ultimately just pull RGBA format out of it
else
{
// Read the file and convert it to RGBX
using (Bitmap temp = new Bitmap(path))
{
tex.originalBitmap = temp.Clone(new Rectangle(0, 0, temp.Width, temp.Height), PixelFormat.Format32bppRgb);
tex.combinedBitmap = tex.originalBitmap;
//tex.bitmaps.Add(conv);
}
// Just use the size of the main surface
tex.Width = (ushort)tex.originalBitmap.Width;
tex.Height = (ushort)tex.originalBitmap.Height;
tex.DataSize = (uint)(tex.Width * tex.Height) * 4;
}
return(tex);
}
private static unsafe byte[] DecompressLum(DDSStruct header, byte[] data, DDSPixelFormat pixelFormat)
{
// allocate bitmap
int bpp = (int)(DDSHelper.PixelFormatToBpp(pixelFormat, header.pixelformat.rgbbitcount));
int bps = (int)(header.width * bpp * DDSHelper.PixelFormatToBpc(pixelFormat));
int sizeofplane = (int)(bps * header.height);
int width = (int)header.width;
int height = (int)header.height;
int depth = (int)header.depth;
byte[] rawData = new byte[depth * sizeofplane + height * bps + width * bpp];
int lShift1 = 0; int lMul = 0; int lShift2 = 0;
DDSHelper.ComputeMaskParams(header.pixelformat.rbitmask, ref lShift1, ref lMul, ref lShift2);
int offset = 0;
int pixnum = width * height * depth;
fixed(byte *bytePtr = data)
{
byte *temp = bytePtr;
while (pixnum-- > 0)
{
byte px = *(temp++);
rawData[offset + 0] = (byte)(((px >> lShift1) * lMul) >> lShift2);
rawData[offset + 1] = (byte)(((px >> lShift1) * lMul) >> lShift2);
rawData[offset + 2] = (byte)(((px >> lShift1) * lMul) >> lShift2);
rawData[offset + 3] = (byte)(((px >> lShift1) * lMul) >> lShift2);
offset += 4;
}
}
return(rawData);
}
private static unsafe byte[] DecompressFloat(DDSStruct header, byte[] data, DDSPixelFormat pixelFormat)
{
// allocate bitmap
int bpp = (int)(DDSHelper.PixelFormatToBpp(pixelFormat, header.pixelformat.rgbbitcount));
int bps = (int)(header.width * bpp * DDSHelper.PixelFormatToBpc(pixelFormat));
int sizeofplane = (int)(bps * header.height);
int width = (int)header.width;
int height = (int)header.height;
int depth = (int)header.depth;
byte[] rawData = new byte[depth * sizeofplane + height * bps + width * bpp];
int size = 0;
fixed(byte *bytePtr = data)
{
byte *temp = bytePtr;
fixed(byte *destPtr = rawData)
{
byte *destData = destPtr;
switch (pixelFormat)
{
case DDSPixelFormat.R32F: // Red float, green = blue = max
size = width * height * depth * 3;
for (int i = 0, j = 0; i < size; i += 3, j++)
{
((float *)destData)[i] = ((float *)temp)[j];
((float *)destData)[i + 1] = 1.0f;
((float *)destData)[i + 2] = 1.0f;
}
break;
case DDSPixelFormat.A32B32G32R32F: // Direct copy of float RGBA data
Array.Copy(data, rawData, data.Length);
break;
case DDSPixelFormat.G32R32F: // Red float, green float, blue = max
size = width * height * depth * 3;
for (int i = 0, j = 0; i < size; i += 3, j += 2)
{
((float *)destData)[i] = ((float *)temp)[j];
((float *)destData)[i + 1] = ((float *)temp)[j + 1];
((float *)destData)[i + 2] = 1.0f;
}
break;
case DDSPixelFormat.R16F: // Red float, green = blue = max
size = width * height * depth * bpp;
DDSHelper.ConvR16ToFloat32((uint *)destData, (ushort *)temp, (uint)size);
break;
case DDSPixelFormat.A16B16G16R16F: // Just convert from half to float.
size = width * height * depth * bpp;
DDSHelper.ConvFloat16ToFloat32((uint *)destData, (ushort *)temp, (uint)size);
break;
case DDSPixelFormat.G16R16F: // Convert from half to float, set blue = max.
size = width * height * depth * bpp;
DDSHelper.ConvG16R16ToFloat32((uint *)destData, (ushort *)temp, (uint)size);
break;
default:
break;
}
}
}
return(rawData);
}
private static unsafe byte[] DecompressRXGB(DDSStruct header, byte[] data, DDSPixelFormat pixelFormat)
{
// allocate bitmap
int bpp = (int)(DDSHelper.PixelFormatToBpp(pixelFormat, header.pixelformat.rgbbitcount));
int bps = (int)(header.width * bpp * DDSHelper.PixelFormatToBpc(pixelFormat));
int sizeofplane = (int)(bps * header.height);
int width = (int)header.width;
int height = (int)header.height;
int depth = (int)header.depth;
byte[] rawData = new byte[depth * sizeofplane + height * bps + width * bpp];
Colour565 color_0 = new Colour565();
Colour565 color_1 = new Colour565();
Colour8888[] colours = new Colour8888[4];
byte[] alphas = new byte[8];
fixed(byte *bytePtr = data)
{
byte *temp = bytePtr;
for (int z = 0; z < depth; z++)
{
for (int y = 0; y < height; y += 4)
{
for (int x = 0; x < width; x += 4)
{
if (y >= height || x >= width)
{
break;
}
alphas[0] = temp[0];
alphas[1] = temp[1];
byte *alphamask = temp + 2;
temp += 8;
DDSHelper.DxtcReadColors(temp, ref color_0, ref color_1);
temp += 4;
uint bitmask = ((uint *)temp)[1];
temp += 4;
colours[0].red = (byte)(color_0.red << 3);
colours[0].green = (byte)(color_0.green << 2);
colours[0].blue = (byte)(color_0.blue << 3);
colours[0].alpha = 0xFF;
colours[1].red = (byte)(color_1.red << 3);
colours[1].green = (byte)(color_1.green << 2);
colours[1].blue = (byte)(color_1.blue << 3);
colours[1].alpha = 0xFF;
// Four-color block: derive the other two colors.
// 00 = color_0, 01 = color_1, 10 = color_2, 11 = color_3
// These 2-bit codes correspond to the 2-bit fields
// stored in the 64-bit block.
colours[2].blue = (byte)((2 * colours[0].blue + colours[1].blue + 1) / 3);
colours[2].green = (byte)((2 * colours[0].green + colours[1].green + 1) / 3);
colours[2].red = (byte)((2 * colours[0].red + colours[1].red + 1) / 3);
colours[2].alpha = 0xFF;
colours[3].blue = (byte)((colours[0].blue + 2 * colours[1].blue + 1) / 3);
colours[3].green = (byte)((colours[0].green + 2 * colours[1].green + 1) / 3);
colours[3].red = (byte)((colours[0].red + 2 * colours[1].red + 1) / 3);
colours[3].alpha = 0xFF;
int k = 0;
for (int j = 0; j < 4; j++)
{
for (int i = 0; i < 4; i++, k++)
{
int select = (int)((bitmask & (0x03 << k * 2)) >> k * 2);
Colour8888 col = colours[select];
// only put pixels out < width or height
if (((x + i) < width) && ((y + j) < height))
{
uint offset = (uint)(z * sizeofplane + (y + j) * bps + (x + i) * bpp);
rawData[offset + 0] = col.red;
rawData[offset + 1] = col.green;
rawData[offset + 2] = col.blue;
}
}
}
// 8-alpha or 6-alpha block?
if (alphas[0] > alphas[1])
{
// 8-alpha block: derive the other six alphas.
// Bit code 000 = alpha_0, 001 = alpha_1, others are interpolated.
alphas[2] = (byte)((6 * alphas[0] + 1 * alphas[1] + 3) / 7); // bit code 010
alphas[3] = (byte)((5 * alphas[0] + 2 * alphas[1] + 3) / 7); // bit code 011
alphas[4] = (byte)((4 * alphas[0] + 3 * alphas[1] + 3) / 7); // bit code 100
alphas[5] = (byte)((3 * alphas[0] + 4 * alphas[1] + 3) / 7); // bit code 101
alphas[6] = (byte)((2 * alphas[0] + 5 * alphas[1] + 3) / 7); // bit code 110
alphas[7] = (byte)((1 * alphas[0] + 6 * alphas[1] + 3) / 7); // bit code 111
}
else
{
// 6-alpha block.
// Bit code 000 = alpha_0, 001 = alpha_1, others are interpolated.
alphas[2] = (byte)((4 * alphas[0] + 1 * alphas[1] + 2) / 5); // Bit code 010
alphas[3] = (byte)((3 * alphas[0] + 2 * alphas[1] + 2) / 5); // Bit code 011
alphas[4] = (byte)((2 * alphas[0] + 3 * alphas[1] + 2) / 5); // Bit code 100
alphas[5] = (byte)((1 * alphas[0] + 4 * alphas[1] + 2) / 5); // Bit code 101
alphas[6] = 0x00; // Bit code 110
alphas[7] = 0xFF; // Bit code 111
}
// Note: Have to separate the next two loops,
// it operates on a 6-byte system.
// First three bytes
uint bits = *((uint *)alphamask);
for (int j = 0; j < 2; j++)
{
for (int i = 0; i < 4; i++)
{
// only put pixels out < width or height
if (((x + i) < width) && ((y + j) < height))
{
uint offset = (uint)(z * sizeofplane + (y + j) * bps + (x + i) * bpp + 3);
rawData[offset] = alphas[bits & 0x07];
}
bits >>= 3;
}
}
// Last three bytes
bits = *((uint *)&alphamask[3]);
for (int j = 2; j < 4; j++)
{
for (int i = 0; i < 4; i++)
{
// only put pixels out < width or height
if (((x + i) < width) && ((y + j) < height))
{
uint offset = (uint)(z * sizeofplane + (y + j) * bps + (x + i) * bpp + 3);
rawData[offset] = alphas[bits & 0x07];
}
bits >>= 3;
}
}
}
}
}
}
return(rawData);
}
private static unsafe byte[] DecompressDXT1(DDSStruct header, byte[] data, DDSPixelFormat pixelFormat)
{
// allocate bitmap
int bpp = (int)(DDSHelper.PixelFormatToBpp(pixelFormat, header.pixelformat.rgbbitcount));
int bps = (int)(header.width * bpp * DDSHelper.PixelFormatToBpc(pixelFormat));
int sizeofplane = (int)(bps * header.height);
int width = (int)header.width;
int height = (int)header.height;
int depth = (int)header.depth;
// DXT1 decompressor
byte[] rawData = new byte[depth * sizeofplane + height * bps + width * bpp];
Colour8888[] colours = new Colour8888[4];
colours[0].alpha = 0xFF;
colours[1].alpha = 0xFF;
colours[2].alpha = 0xFF;
fixed(byte *bytePtr = data)
{
byte *temp = bytePtr;
for (int z = 0; z < depth; z++)
{
for (int y = 0; y < height; y += 4)
{
for (int x = 0; x < width; x += 4)
{
ushort colour0 = *((ushort *)temp);
ushort colour1 = *((ushort *)(temp + 2));
DDSHelper.DxtcReadColor(colour0, ref colours[0]);
DDSHelper.DxtcReadColor(colour1, ref colours[1]);
uint bitmask = ((uint *)temp)[1];
temp += 8;
if (colour0 > colour1)
{
// Four-color block: derive the other two colors.
// 00 = color_0, 01 = color_1, 10 = color_2, 11 = color_3
// These 2-bit codes correspond to the 2-bit fields
// stored in the 64-bit block.
colours[2].blue = (byte)((2 * colours[0].blue + colours[1].blue + 1) / 3);
colours[2].green = (byte)((2 * colours[0].green + colours[1].green + 1) / 3);
colours[2].red = (byte)((2 * colours[0].red + colours[1].red + 1) / 3);
//colours[2].alpha = 0xFF;
colours[3].blue = (byte)((colours[0].blue + 2 * colours[1].blue + 1) / 3);
colours[3].green = (byte)((colours[0].green + 2 * colours[1].green + 1) / 3);
colours[3].red = (byte)((colours[0].red + 2 * colours[1].red + 1) / 3);
colours[3].alpha = 0xFF;
}
else
{
// Three-color block: derive the other color.
// 00 = color_0, 01 = color_1, 10 = color_2,
// 11 = transparent.
// These 2-bit codes correspond to the 2-bit fields
// stored in the 64-bit block.
colours[2].blue = (byte)((colours[0].blue + colours[1].blue) / 2);
colours[2].green = (byte)((colours[0].green + colours[1].green) / 2);
colours[2].red = (byte)((colours[0].red + colours[1].red) / 2);
//colours[2].alpha = 0xFF;
colours[3].blue = (byte)((colours[0].blue + 2 * colours[1].blue + 1) / 3);
colours[3].green = (byte)((colours[0].green + 2 * colours[1].green + 1) / 3);
colours[3].red = (byte)((colours[0].red + 2 * colours[1].red + 1) / 3);
colours[3].alpha = 0x00;
}
for (int j = 0, k = 0; j < 4; j++)
{
for (int i = 0; i < 4; i++, k++)
{
int select = (int)((bitmask & (0x03 << k * 2)) >> k * 2);
Colour8888 col = colours[select];
if (((x + i) < width) && ((y + j) < height))
{
uint offset = (uint)(z * sizeofplane + (y + j) * bps + (x + i) * bpp);
rawData[offset + 0] = (byte)col.red;
rawData[offset + 1] = (byte)col.green;
rawData[offset + 2] = (byte)col.blue;
rawData[offset + 3] = (byte)col.alpha;
}
}
}
}
}
}
}
return(rawData);
}
private static unsafe byte[] DecompressAti1n(DDSStruct header, byte[] data, DDSPixelFormat pixelFormat)
{
// allocate bitmap
int bpp = (int)(DDSHelper.PixelFormatToBpp(pixelFormat, header.pixelformat.rgbbitcount));
int bps = (int)(header.width * bpp * DDSHelper.PixelFormatToBpc(pixelFormat));
int sizeofplane = (int)(bps * header.height);
int width = (int)header.width;
int height = (int)header.height;
int depth = (int)header.depth;
byte[] rawData = new byte[depth * sizeofplane + height * bps + width * bpp];
byte[] colours = new byte[8];
uint offset = 0;
fixed(byte *bytePtr = data)
{
byte *temp = bytePtr;
for (int z = 0; z < depth; z++)
{
for (int y = 0; y < height; y += 4)
{
for (int x = 0; x < width; x += 4)
{
//Read palette
int t1 = colours[0] = temp[0];
int t2 = colours[1] = temp[1];
temp += 2;
if (t1 > t2)
{
for (int i = 2; i < 8; ++i)
{
colours[i] = (byte)(t1 + ((t2 - t1) * (i - 1)) / 7);
}
}
else
{
for (int i = 2; i < 6; ++i)
{
colours[i] = (byte)(t1 + ((t2 - t1) * (i - 1)) / 5);
}
colours[6] = 0;
colours[7] = 255;
}
//decompress pixel data
uint currOffset = offset;
for (int k = 0; k < 4; k += 2)
{
// First three bytes
uint bitmask = ((uint)(temp[0]) << 0) | ((uint)(temp[1]) << 8) | ((uint)(temp[2]) << 16);
for (int j = 0; j < 2; j++)
{
// only put pixels out < height
if ((y + k + j) < height)
{
for (int i = 0; i < 4; i++)
{
// only put pixels out < width
if (((x + i) < width))
{
t1 = (int)(currOffset + (x + i));
rawData[t1] = colours[bitmask & 0x07];
}
bitmask >>= 3;
}
currOffset += (uint)bps;
}
}
temp += 3;
}
}
offset += (uint)(bps * 4);
}
}
}
return(rawData);
}
private static unsafe byte[] Decompress3Dc(DDSStruct header, byte[] data, DDSPixelFormat pixelFormat)
{
// allocate bitmap
int bpp = (int)(DDSHelper.PixelFormatToBpp(pixelFormat, header.pixelformat.rgbbitcount));
int bps = (int)(header.width * bpp * DDSHelper.PixelFormatToBpc(pixelFormat));
int sizeofplane = (int)(bps * header.height);
int width = (int)header.width;
int height = (int)header.height;
int depth = (int)header.depth;
byte[] rawData = new byte[depth * sizeofplane + height * bps + width * bpp];
byte[] yColours = new byte[8];
byte[] xColours = new byte[8];
int offset = 0;
fixed(byte *bytePtr = data)
{
byte *temp = bytePtr;
for (int z = 0; z < depth; z++)
{
for (int y = 0; y < height; y += 4)
{
for (int x = 0; x < width; x += 4)
{
byte *temp2 = temp + 8;
//Read Y palette
int t1 = yColours[0] = temp[0];
int t2 = yColours[1] = temp[1];
temp += 2;
if (t1 > t2)
{
for (int i = 2; i < 8; ++i)
{
yColours[i] = (byte)(t1 + ((t2 - t1) * (i - 1)) / 7);
}
}
else
{
for (int i = 2; i < 6; ++i)
{
yColours[i] = (byte)(t1 + ((t2 - t1) * (i - 1)) / 5);
}
yColours[6] = 0;
yColours[7] = 255;
}
// Read X palette
t1 = xColours[0] = temp2[0];
t2 = xColours[1] = temp2[1];
temp2 += 2;
if (t1 > t2)
{
for (int i = 2; i < 8; ++i)
{
xColours[i] = (byte)(t1 + ((t2 - t1) * (i - 1)) / 7);
}
}
else
{
for (int i = 2; i < 6; ++i)
{
xColours[i] = (byte)(t1 + ((t2 - t1) * (i - 1)) / 5);
}
xColours[6] = 0;
xColours[7] = 255;
}
//decompress pixel data
int currentOffset = offset;
for (int k = 0; k < 4; k += 2)
{
// First three bytes
uint bitmask = ((uint)(temp[0]) << 0) | ((uint)(temp[1]) << 8) | ((uint)(temp[2]) << 16);
uint bitmask2 = ((uint)(temp2[0]) << 0) | ((uint)(temp2[1]) << 8) | ((uint)(temp2[2]) << 16);
for (int j = 0; j < 2; j++)
{
// only put pixels out < height
if ((y + k + j) < height)
{
for (int i = 0; i < 4; i++)
{
// only put pixels out < width
if (((x + i) < width))
{
int t;
byte tx, ty;
t1 = currentOffset + (x + i) * 3;
rawData[t1 + 1] = ty = yColours[bitmask & 0x07];
rawData[t1 + 0] = tx = xColours[bitmask2 & 0x07];
//calculate b (z) component ((r/255)^2 + (g/255)^2 + (b/255)^2 = 1
t = 127 * 128 - (tx - 127) * (tx - 128) - (ty - 127) * (ty - 128);
if (t > 0)
{
rawData[t1 + 2] = (byte)(Math.Sqrt(t) + 128);
}
else
{
rawData[t1 + 2] = 0x7F;
}
}
bitmask >>= 3;
bitmask2 >>= 3;
}
currentOffset += bps;
}
}
temp += 3;
temp2 += 3;
}
//skip bytes that were read via Temp2
temp += 8;
}
offset += bps * 4;
}
}
}
return(rawData);
}
private static unsafe byte[] DecompressDXT3(DDSStruct header, byte[] data, DDSPixelFormat pixelFormat)
{
// allocate bitmap
int bpp = (int)(DDSHelper.PixelFormatToBpp(pixelFormat, header.pixelformat.rgbbitcount));
int bps = (int)(header.width * bpp * DDSHelper.PixelFormatToBpc(pixelFormat));
int sizeofplane = (int)(bps * header.height);
int width = (int)header.width;
int height = (int)header.height;
int depth = (int)header.depth;
// DXT3 decompressor
byte[] rawData = new byte[depth * sizeofplane + height * bps + width * bpp];
Colour8888[] colours = new Colour8888[4];
fixed(byte *bytePtr = data)
{
byte *temp = bytePtr;
for (int z = 0; z < depth; z++)
{
for (int y = 0; y < height; y += 4)
{
for (int x = 0; x < width; x += 4)
{
byte *alpha = temp;
temp += 8;
DDSHelper.DxtcReadColors(temp, ref colours);
temp += 4;
uint bitmask = ((uint *)temp)[1];
temp += 4;
// Four-color block: derive the other two colors.
// 00 = color_0, 01 = color_1, 10 = color_2, 11 = color_3
// These 2-bit codes correspond to the 2-bit fields
// stored in the 64-bit block.
colours[2].blue = (byte)((2 * colours[0].blue + colours[1].blue + 1) / 3);
colours[2].green = (byte)((2 * colours[0].green + colours[1].green + 1) / 3);
colours[2].red = (byte)((2 * colours[0].red + colours[1].red + 1) / 3);
//colours[2].alpha = 0xFF;
colours[3].blue = (byte)((colours[0].blue + 2 * colours[1].blue + 1) / 3);
colours[3].green = (byte)((colours[0].green + 2 * colours[1].green + 1) / 3);
colours[3].red = (byte)((colours[0].red + 2 * colours[1].red + 1) / 3);
//colours[3].alpha = 0xFF;
for (int j = 0, k = 0; j < 4; j++)
{
for (int i = 0; i < 4; k++, i++)
{
int select = (int)((bitmask & (0x03 << k * 2)) >> k * 2);
if (((x + i) < width) && ((y + j) < height))
{
uint offset = (uint)(z * sizeofplane + (y + j) * bps + (x + i) * bpp);
rawData[offset + 0] = (byte)colours[select].red;
rawData[offset + 1] = (byte)colours[select].green;
rawData[offset + 2] = (byte)colours[select].blue;
}
}
}
for (int j = 0; j < 4; j++)
{
//ushort word = (ushort)(alpha[2 * j] + 256 * alpha[2 * j + 1]);
ushort word = (ushort)(alpha[2 * j] | (alpha[2 * j + 1] << 8));
for (int i = 0; i < 4; i++)
{
if (((x + i) < width) && ((y + j) < height))
{
uint offset = (uint)(z * sizeofplane + (y + j) * bps + (x + i) * bpp + 3);
rawData[offset] = (byte)(word & 0x0F);
rawData[offset] = (byte)(rawData[offset] | (rawData[offset] << 4));
}
word >>= 4;
}
}
}
}
}
}
return(rawData);
}
public virtual TgvImage Read(String filePath)
{
var file = new TgvImage();
byte[] rawDDSData = File.ReadAllBytes(filePath);
using (var ms = new MemoryStream(rawDDSData))
{
var buffer = new byte[4];
ms.Read(buffer, 0, buffer.Length);
if (BitConverter.ToUInt32(buffer, 0) != DDSFormat.MagicHeader)
{
throw new ArgumentException("Wrong DDS magic");
}
buffer = new byte[Marshal.SizeOf(typeof(DDSFormat.Header))];
ms.Read(buffer, 0, buffer.Length);
var header = MiscUtilities.ByteArrayToStructure <DDSFormat.Header>(buffer);
DDSHelper.ConversionFlags conversionFlags;
var format = DDSHelper.GetDXGIFormat(ref header.PixelFormat, out conversionFlags);
if (header.MipMapCount == 0)
{
header.MipMapCount = 1;
}
for (int i = 0; i < header.MipMapCount; i++)
{
uint mipScale = (uint)Math.Max(1, 2 << (i - 1));
uint mipWidth = Math.Max(1, header.Width / mipScale);
uint mipHeight = Math.Max(1, header.Height / mipScale);
if (mipWidth < MinMipMapWidth || mipHeight < MinMipMapHeight)
{
break;
}
uint minMipByteLength = DDSMipMapUilities.GetMinimumMipMapSizeForFormat(header.PixelFormat);
uint mipByteLength = (uint)DDSMipMapUilities.GetMipMapBytesCount((int)mipWidth, (int)mipHeight, format);
mipByteLength = Math.Max(minMipByteLength, mipByteLength);
buffer = new byte[mipByteLength];
ms.Read(buffer, 0, buffer.Length);
var mip = new TgvMipMap();
mip.Content = buffer;
mip.Length = mipByteLength;
mip.MipSize = mipWidth * mipHeight;//(int)mipSize; //spr. czy to jest równe size czy width * height;
mip.MipWidth = mipWidth;
mip.MipHeight = mipHeight;
file.MipMaps.Add(mip);
}
file.Height = header.Height;
file.ImageHeight = header.Height;
file.Width = header.Width;
file.ImageWidth = header.Width;
file.MipMapCount = (ushort)file.MipMaps.Count;
file.Format = format;
file.PixelFormatString = TgvUtilities.GetTgvFromPixelFormat(format);
}
return(file);
}
public override void InitViewer(TREInfoFile treInfoFile)
{
base.InitViewer(treInfoFile);
pictureBox.Image = DDSHelper.LoadBitmap(treInfoFile.Data);
}
