public MemoryStream EncodeTexture()
{
// Calculate what the length of the texture will be
int textureLength = 16 + (TextureWidth * TextureHeight * DataCodec.Bpp / 8);
if (HasGlobalIndex)
{
textureLength += 16;
}
if (DataCodec.PaletteEntries != 0 && !DataCodec.NeedsExternalPalette)
{
textureLength += (DataCodec.PaletteEntries * PixelCodec.Bpp / 8);
}
// Calculate the mipmap padding (if the texture contains mipmaps)
int mipmapPadding = 0;
if (DataCodec.HasMipmaps)
{
if (DataFormat == PvrDataFormat.SQUARE_TWIDDLED_MIPMAP)
{
// A 1x1 mipmap takes up as much space as a 2x1 mipmap
// There are also 4 extra bytes at the end of the file
mipmapPadding = (DataCodec.Bpp) >> 3;
textureLength += 4;
}
else if (DataFormat == PvrDataFormat.SQUARE_TWIDDLED_MIPMAP_ALT)
{
// A 1x1 mipmap takes up as much space as a 2x2 mipmap
mipmapPadding = (3 * DataCodec.Bpp) >> 3;
}
textureLength += mipmapPadding;
for (int size = 1; size < TextureWidth; size <<= 1)
{
textureLength += Math.Max((size * size * DataCodec.Bpp) >> 3, 1);
}
}
MemoryStream destination = new MemoryStream(textureLength);
// Write out the GBIX header (if we are including one)
if (HasGlobalIndex)
{
destination.WriteByte((byte)'G');
destination.WriteByte((byte)'B');
destination.WriteByte((byte)'I');
destination.WriteByte((byte)'X');
PTStream.WriteUInt32(destination, 8);
PTStream.WriteUInt32(destination, GlobalIndex);
PTStream.WriteUInt32(destination, 0);
}
// Write out the PVRT header
destination.WriteByte((byte)'P');
destination.WriteByte((byte)'V');
destination.WriteByte((byte)'R');
destination.WriteByte((byte)'T');
if (HasGlobalIndex)
{
PTStream.WriteInt32(destination, textureLength - 24);
}
else
{
PTStream.WriteInt32(destination, textureLength - 8);
}
destination.WriteByte((byte)PixelFormat);
destination.WriteByte((byte)DataFormat);
PTStream.WriteUInt16(destination, 0);
PTStream.WriteUInt16(destination, TextureWidth);
PTStream.WriteUInt16(destination, TextureHeight);
// If we have an internal palette, write it
if (DataCodec.PaletteEntries != 0 && !DataCodec.NeedsExternalPalette)
{
byte[] palette = PixelCodec.EncodePalette(m_texturePalette, DataCodec.PaletteEntries);
destination.Write(palette, 0, palette.Length);
}
// Write out any mipmaps
if (DataCodec.HasMipmaps)
{
// Write out any padding bytes before the 1x1 mipmap
for (int i = 0; i < mipmapPadding; i++)
{
destination.WriteByte(0);
}
for (int size = 1; size < TextureWidth; size <<= 1)
{
byte[] mipmapDecodedData = null;
if (DataCodec.NeedsExternalPalette)
{
if (DataCodec.VQ)
{
mipmapDecodedData = BitmapToRawVQResized(m_decodedBitmap, size, 1, m_codeBook);
}
else
{
mipmapDecodedData = BitmapToRawIndexedResized(m_decodedBitmap, size, 1, m_palette);
}
}
else
{
mipmapDecodedData = BitmapToRawResized(m_decodedBitmap, size, 1);
}
byte[] mipmapTextureData = DataCodec.Encode(mipmapDecodedData, 0, size, size);
destination.Write(mipmapTextureData, 0, mipmapTextureData.Length);
}
}
// Write the texture data
byte[] textureData = DataCodec.Encode(m_decodedData, TextureWidth, TextureHeight, null);
destination.Write(textureData, 0, textureData.Length);
// If the data format is square twiddled with mipmaps, write out the extra bytes.
if (DataFormat == PvrDataFormat.SQUARE_TWIDDLED_MIPMAP)
{
destination.Write(new byte[] { 0, 0, 0, 0 }, 0, 4);
}
// Compress the texture
if (CompressionFormat != PvrCompressionFormat.NONE)
{
CompressionCodec = PvrCompressionCodec.GetCompressionCodec(CompressionFormat);
if (CompressionCodec != null)
{
// Ok, we need to convert the current stream to an array, compress it, then write it back to a new stream
byte[] buffer = destination.ToArray();
buffer = CompressionCodec.Compress(buffer, (HasGlobalIndex ? 0x20 : 0x10), PixelCodec, DataCodec);
destination = new MemoryStream();
destination.Write(buffer, 0, buffer.Length);
}
}
return(destination);
}
/// <summary>
/// Internal write implementation of the sub classes.
/// </summary>
/// <param name="writer"></param>
/// <exception cref="Exception">Expected DDS RGB24 or RGBA32 color format!</exception>
/// <exception cref="InvalidOperationException">
/// </exception>
protected override void _Write(BinaryWriter writer)
{
long baseOffset = writer.BaseStream.Position;
Bitmap bmp = CreateBitmap();
//bmp.RotateFlip(RotateFlipType.RotateNoneFlipY);
if (DataFormat == PvrDataFormat.DDS || DataFormat == PvrDataFormat.DDS_2)
{
if (!(PixelFormat == PvrPixelFormat.DDS_DXT1_RGB24 || PixelFormat == PvrPixelFormat.DDS_DXT3_RGBA32))
{
throw new Exception("Expected DDS RGB24 or RGBA32 color format!");
}
byte[] ddsBuffer = null;
if (PixelFormat == PvrPixelFormat.DDS_DXT1_RGB24)
{
DDSFormatDetails ddsFormatDetails = new DDSFormatDetails(DDSFormat.DDS_DXT1);
ddsBuffer = DDSGeneral.Save(MipMaps, ddsFormatDetails, DDSGeneral.AlphaSettings.KeepAlpha, DDSGeneral.MipHandling.Default);
}
else if (PixelFormat == PvrPixelFormat.DDS_DXT3_RGBA32)
{
DDSFormatDetails ddsFormatDetails = new DDSFormatDetails(DDSFormat.DDS_DXT3);
ddsBuffer = DDSGeneral.Save(MipMaps, ddsFormatDetails, DDSGeneral.AlphaSettings.KeepAlpha, DDSGeneral.MipHandling.Default);
}
if (HasGlobalIndex)
{
writer.Write(m_gbix);
writer.Write(GlobalIndexSize);
writer.Write(GlobalIndex);
}
writer.Write(m_pvrt);
writer.Write(ddsBuffer.Length + 16);
writer.Write((byte)PixelFormat);
writer.Write((byte)DataFormat);
writer.Write((ushort)0);
writer.Write((ushort)Width);
writer.Write((ushort)Height);
writer.Write(ddsBuffer);
}
else
{
// Set the data format and pixel format and load the appropiate codecs
PixelCodec = PvrPixelCodec.GetPixelCodec(PixelFormat);
DataCodec = PvrDataCodec.GetDataCodec(DataFormat);
// Make sure the pixel and data codecs exists and we can encode to it
if (PixelCodec == null || !PixelCodec.CanEncode)
{
throw new InvalidOperationException();
}
if (DataCodec == null || !DataCodec.CanEncode)
{
throw new InvalidOperationException();
}
DataCodec.PixelCodec = PixelCodec;
byte[] decodedData = null;
if (DataCodec.PaletteEntries != 0)
{
if (DataCodec.VQ)
{
decodedData = BitmapToRawVQ(bmp, DataCodec.PaletteEntries, out m_texturePalette);
}
else
{
// Convert the bitmap to an array containing indicies.
decodedData = BitmapToRawIndexed(bmp, DataCodec.PaletteEntries, out m_texturePalette);
// If this texture has an external palette file, set up the palette encoder
if (DataCodec.NeedsExternalPalette)
{
PaletteEncoder = new PvpPaletteEncoder(m_texturePalette, (ushort)DataCodec.PaletteEntries, PixelFormat, PixelCodec);
}
}
}
else
{
decodedData = BitmapToRaw(bmp);
}
// Calculate what the length of the texture will be
int textureLength = 16 + (int)(Width * Height * (DataCodec.Bpp / 8.0));
if (HasGlobalIndex)
{
textureLength += 16;
}
if (DataCodec.PaletteEntries != 0 && !DataCodec.NeedsExternalPalette)
{
textureLength += (DataCodec.PaletteEntries * PixelCodec.Bpp / 8);
}
// Calculate the mipmap padding (if the texture contains mipmaps)
int mipmapPadding = 0;
if (DataCodec.HasMipmaps)
{
if (DataFormat == PvrDataFormat.SQUARE_TWIDDLED_MIPMAP)
{
// A 1x1 mipmap takes up as much space as a 2x1 mipmap
// There are also 4 extra bytes at the end of the file
mipmapPadding = (DataCodec.Bpp) >> 3;
textureLength += 4;
}
else if (DataFormat == PvrDataFormat.SQUARE_TWIDDLED_MIPMAP_ALT)
{
// A 1x1 mipmap takes up as much space as a 2x2 mipmap
mipmapPadding = (3 * DataCodec.Bpp) >> 3;
}
textureLength += mipmapPadding;
for (int size = 1; size < Width; size <<= 1)
{
textureLength += Math.Max((size * size * DataCodec.Bpp) >> 3, 1);
}
}
MemoryStream output = new MemoryStream(textureLength);
BinaryWriter outputWriter = new BinaryWriter(output);
// Write out the GBIX header (if we are including one)
if (HasGlobalIndex)
{
outputWriter.Write(m_gbix);
outputWriter.Write(GlobalIndexSize);
outputWriter.Write(GlobalIndex);
}
// Write out the PVRT header
outputWriter.Write(m_pvrt);
if (HasGlobalIndex)
{
outputWriter.Write(textureLength - 24);
}
else
{
outputWriter.Write(textureLength - 8);
}
outputWriter.Write((byte)PixelFormat);
outputWriter.Write((byte)DataFormat);
outputWriter.Write((ushort)0);
outputWriter.Write((ushort)Width);
outputWriter.Write((ushort)Height);
// If we have an internal palette, write it
if (DataCodec.PaletteEntries != 0 && !DataCodec.NeedsExternalPalette)
{
byte[] palette = PixelCodec.EncodePalette(m_texturePalette, DataCodec.PaletteEntries);
output.Write(palette, 0, palette.Length);
}
// Write out any mipmaps
if (DataCodec.HasMipmaps)
{
// Write out any padding bytes before the 1x1 mipmap
for (int i = 0; i < mipmapPadding; i++)
{
output.WriteByte(0);
}
for (int size = 1; size < Width; size <<= 1)
{
byte[] mipmapDecodedData = null;
if (DataCodec.NeedsExternalPalette)
{
if (DataCodec.VQ)
{
mipmapDecodedData = BitmapToRawVQResized(bmp, size, 1, m_codeBook);
}
else
{
mipmapDecodedData = BitmapToRawIndexedResized(bmp, size, 1, m_palette);
}
}
else
{
mipmapDecodedData = BitmapToRawResized(bmp, size, 1);
}
byte[] mipmapTextureData = DataCodec.Encode(mipmapDecodedData, 0, size, size);
output.Write(mipmapTextureData, 0, mipmapTextureData.Length);
}
}
// Write the texture data
byte[] textureData = DataCodec.Encode(decodedData, Width, Height, null);
output.Write(textureData, 0, textureData.Length);
// If the data format is square twiddled with mipmaps, write out the extra bytes.
if (DataFormat == PvrDataFormat.SQUARE_TWIDDLED_MIPMAP)
{
output.Write(new byte[] { 0, 0, 0, 0 }, 0, 4);
}
// Compress the texture
if (CompressionFormat != PvrCompressionFormat.NONE)
{
CompressionCodec = PvrCompressionCodec.GetCompressionCodec(CompressionFormat);
if (CompressionCodec != null)
{
// Ok, we need to convert the current stream to an array, compress it, then write it back to a new stream
byte[] buffer = output.ToArray();
buffer = CompressionCodec.Compress(buffer, (HasGlobalIndex ? 0x20 : 0x10), PixelCodec, DataCodec);
writer.Write(buffer);
}
}
else
{
writer.Write(output.GetBuffer());
}
}
}
