private static string CompressionFormatToString(PvrCompressionFormat format)
{
switch (format)
{
case PvrCompressionFormat.Rle: return("RLE");
}
return("None");
}
public static PvrCompressionCodec GetCompressionCodec(PvrCompressionFormat format)
{
switch (format)
{
case PvrCompressionFormat.Rle:
return new Rle();
}
return null;
}
public static PvrCompressionCodec GetCompressionCodec(PvrCompressionFormat format)
{
switch (format)
{
case PvrCompressionFormat.Rle:
return(new Rle());
}
return(null);
}
public PvrTexture()
{
// Set default values
HasGlobalIndex = true;
GlobalIndex = 0;
PixelFormat = PvrPixelFormat.Argb1555;
DataFormat = PvrDataFormat.SquareTwiddled;
compressionFormat = PvrCompressionFormat.None;
}
private bool Initalize(PvrPixelFormat pixelFormat, PvrDataFormat dataFormat)
{
// Set the default values
hasGlobalIndex = true;
globalIndex = 0;
compressionFormat = PvrCompressionFormat.None;
// Set the data format and pixel format and load the appropiate codecs
this.pixelFormat = pixelFormat;
pixelCodec = PvrPixelCodec.GetPixelCodec(pixelFormat);
this.dataFormat = dataFormat;
dataCodec = PvrDataCodec.GetDataCodec(dataFormat);
// Make sure the pixel and data codecs exists and we can encode to it
if (pixelCodec == null || !pixelCodec.CanEncode)
{
return(false);
}
if (dataCodec == null || !dataCodec.CanEncode)
{
return(false);
}
dataCodec.PixelCodec = pixelCodec;
if (dataCodec.PaletteEntries != 0)
{
// Convert the bitmap to an array containing indicies.
decodedData = BitmapToRawIndexed(decodedBitmap, dataCodec.PaletteEntries, out texturePalette);
// If this texture has an external palette file, set up the palette encoder
if (dataCodec.NeedsExternalPalette)
{
paletteEncoder = new PvpPaletteEncoder(texturePalette, (ushort)dataCodec.PaletteEntries, pixelFormat, pixelCodec);
}
}
else
{
// Convert the bitmap to an array
decodedData = BitmapToRaw(decodedBitmap);
}
return(true);
}
protected override void Initalize()
{
// Check to see if what we are dealing with is a PVR texture
if (!Is(encodedData))
{
throw new NotAValidTextureException("This is not a valid PVR texture.");
}
// Determine the offsets of the GBIX (if present) and PVRT header chunks.
if (PTMethods.Contains(encodedData, 0x00, gbixFourCC))
{
gbixOffset = 0x00;
pvrtOffset = 0x08 + BitConverter.ToInt32(encodedData, gbixOffset + 4);
}
else if (PTMethods.Contains(encodedData, 0x04, gbixFourCC))
{
gbixOffset = 0x04;
pvrtOffset = 0x0C + BitConverter.ToInt32(encodedData, gbixOffset + 4);
}
else if (PTMethods.Contains(encodedData, 0x04, pvrtFourCC))
{
gbixOffset = -1;
pvrtOffset = 0x04;
}
else
{
gbixOffset = -1;
pvrtOffset = 0x00;
}
// Read the global index (if it is present). If it is not present, just set it to 0.
if (gbixOffset != -1)
{
globalIndex = BitConverter.ToUInt32(encodedData, gbixOffset + 0x08);
}
else
{
globalIndex = 0;
}
// Read information about the texture
textureWidth = BitConverter.ToUInt16(encodedData, pvrtOffset + 0x0C);
textureHeight = BitConverter.ToUInt16(encodedData, pvrtOffset + 0x0E);
pixelFormat = (PvrPixelFormat)encodedData[pvrtOffset + 0x08];
dataFormat = (PvrDataFormat)encodedData[pvrtOffset + 0x09];
// Get the codecs and make sure we can decode using them
pixelCodec = PvrPixelCodec.GetPixelCodec(pixelFormat);
dataCodec = PvrDataCodec.GetDataCodec(dataFormat);
if (dataCodec != null && pixelCodec != null)
{
dataCodec.PixelCodec = pixelCodec;
canDecode = true;
}
// Set the number of palette entries
// The number in a Small Vq encoded texture various based on its size
paletteEntries = dataCodec.PaletteEntries;
if (dataFormat == PvrDataFormat.SmallVq || dataFormat == PvrDataFormat.SmallVqMipmaps)
{
if (textureWidth <= 16)
{
paletteEntries = 64; // Actually 16
}
else if (textureWidth <= 32)
{
paletteEntries = 256; // Actually 64
}
else if (textureWidth <= 64)
{
paletteEntries = 512; // Actually 128
}
else
{
paletteEntries = 1024; // Actually 256
}
}
// Set the palette and data offsets
if (!canDecode || paletteEntries == 0 || dataCodec.NeedsExternalPalette)
{
paletteOffset = -1;
dataOffset = pvrtOffset + 0x10;
}
else
{
paletteOffset = pvrtOffset + 0x10;
dataOffset = paletteOffset + (paletteEntries * (pixelCodec.Bpp >> 3));
}
// Get the compression format and determine if we need to decompress this texture
compressionFormat = GetCompressionFormat(encodedData, pvrtOffset, dataOffset);
compressionCodec = PvrCompressionCodec.GetCompressionCodec(compressionFormat);
if (compressionFormat != PvrCompressionFormat.None && compressionCodec != null)
{
encodedData = compressionCodec.Decompress(encodedData, dataOffset, pixelCodec, dataCodec);
// Now place the offsets in the appropiate area
if (compressionFormat == PvrCompressionFormat.Rle)
{
if (gbixOffset != -1) gbixOffset -= 4;
pvrtOffset -= 4;
if (paletteOffset != -1) paletteOffset -= 4;
dataOffset -= 4;
}
}
// If the texture contains mipmaps, gets the offsets of them
if (canDecode && dataCodec.HasMipmaps)
{
mipmapOffsets = new int[(int)Math.Log(textureWidth, 2) + 1];
int mipmapOffset = 0;
// Calculate the padding for the first mipmap offset
if (dataFormat == PvrDataFormat.SquareTwiddledMipmaps)
{
// A 1x1 mipmap takes up as much space as a 2x1 mipmap
mipmapOffset = (dataCodec.Bpp) >> 3;
}
else if (dataFormat == PvrDataFormat.SquareTwiddledMipmapsAlt)
{
// A 1x1 mipmap takes up as much space as a 2x2 mipmap
mipmapOffset = (3 * dataCodec.Bpp) >> 3;
}
for (int i = mipmapOffsets.Length - 1, size = 1; i >= 0; i--, size <<= 1)
{
mipmapOffsets[i] = mipmapOffset;
mipmapOffset += Math.Max((size * size * dataCodec.Bpp) >> 3, 1);
}
}
initalized = true;
}
protected override void Initalize()
{
// Check to see if what we are dealing with is a PVR texture
if (!Is(encodedData))
{
throw new NotAValidTextureException("This is not a valid PVR texture.");
}
// Determine the offsets of the GBIX (if present) and PVRT header chunks.
if (PTMethods.Contains(encodedData, 0x00, Encoding.UTF8.GetBytes("GBIX")))
{
gbixOffset = 0x00;
pvrtOffset = 0x10;
}
else if (PTMethods.Contains(encodedData, 0x04, Encoding.UTF8.GetBytes("GBIX")))
{
gbixOffset = 0x04;
pvrtOffset = 0x14;
}
else if (PTMethods.Contains(encodedData, 0x04, Encoding.UTF8.GetBytes("PVRT")))
{
gbixOffset = -1;
pvrtOffset = 0x04;
}
else
{
gbixOffset = -1;
pvrtOffset = 0x00;
}
// Read the global index (if it is present). If it is not present, just set it to 0.
if (gbixOffset != -1)
{
globalIndex = BitConverter.ToUInt32(encodedData, gbixOffset + 0x08);
}
else
{
globalIndex = 0;
}
// Read information about the texture
textureWidth = BitConverter.ToUInt16(encodedData, pvrtOffset + 0x0C);
textureHeight = BitConverter.ToUInt16(encodedData, pvrtOffset + 0x0E);
pixelFormat = (PvrPixelFormat)encodedData[pvrtOffset + 0x08];
dataFormat = (PvrDataFormat)encodedData[pvrtOffset + 0x09];
// Get the codecs and make sure we can decode using them
pixelCodec = PvrPixelCodec.GetPixelCodec(pixelFormat);
dataCodec = PvrDataCodec.GetDataCodec(dataFormat);
if (dataCodec != null && pixelCodec != null)
{
dataCodec.PixelCodec = pixelCodec;
canDecode = true;
}
// Set the palette and data offsets
if (!canDecode || dataCodec.PaletteEntries == 0 || dataCodec.NeedsExternalPalette)
{
paletteOffset = -1;
dataOffset = pvrtOffset + 0x10;
}
else
{
paletteOffset = pvrtOffset + 0x10;
dataOffset = paletteOffset + (dataCodec.PaletteEntries * (pixelCodec.Bpp >> 3));
}
// Get the compression format and determine if we need to decompress this texture
compressionFormat = GetCompressionFormat(encodedData, pvrtOffset, dataOffset);
compressionCodec = PvrCompressionCodec.GetCompressionCodec(compressionFormat);
if (compressionFormat != PvrCompressionFormat.None && compressionCodec != null)
{
encodedData = compressionCodec.Decompress(encodedData, dataOffset, pixelCodec, dataCodec);
// Now place the offsets in the appropiate area
if (compressionFormat == PvrCompressionFormat.Rle)
{
if (gbixOffset != -1)
{
gbixOffset -= 4;
}
pvrtOffset -= 4;
if (paletteOffset != -1)
{
paletteOffset -= 4;
}
dataOffset -= 4;
}
}
// If the texture contains mipmaps, gets the offsets of them
if (canDecode && dataCodec.HasMipmaps)
{
mipmapOffsets = new int[(int)Math.Log(textureWidth, 2) + 1];
int mipmapOffset = 0;
// Calculate the padding for the first mipmap offset
if (dataFormat == PvrDataFormat.SquareTwiddledMipmaps)
{
// A 1x1 mipmap takes up as much space as a 2x1 mipmap
mipmapOffset = (dataCodec.Bpp) >> 3;
}
if (dataFormat == PvrDataFormat.SquareTwiddledMipmapsAlt)
{
// A 1x1 mipmap takes up as much space as a 2x2 mipmap
mipmapOffset = (3 * dataCodec.Bpp) >> 3;
}
for (int i = mipmapOffsets.Length - 1, size = 1; i >= 0; i--, size <<= 1)
{
mipmapOffsets[i] = mipmapOffset;
mipmapOffset += Math.Max((size * size * dataCodec.Bpp) >> 3, 1);
}
}
initalized = true;
}
private static string CompressionFormatToString(PvrCompressionFormat format)
{
switch (format)
{
case PvrCompressionFormat.Rle: return "RLE";
}
return "None";
}
public void Initalize()
{
// Determine the offsets of the GBIX (if present) and PVRT header chunks.
if (PTMethods.Contains(m_encodedData, 0x00, gbixFourCC))
{
GbixOffset = 0x00;
PvrtOffset = 0x08 + BitConverter.ToInt32(m_encodedData, GbixOffset + 4);
}
else if (PTMethods.Contains(m_encodedData, 0x04, gbixFourCC))
{
GbixOffset = 0x04;
PvrtOffset = 0x0C + BitConverter.ToInt32(m_encodedData, GbixOffset + 4);
}
else if (PTMethods.Contains(m_encodedData, 0x04, pvrtFourCC))
{
GbixOffset = -1;
PvrtOffset = 0x04;
}
else
{
GbixOffset = -1;
PvrtOffset = 0x00;
}
// Read the global index (if it is present). If it is not present, just set it to 0.
if (GbixOffset != -1)
{
GlobalIndex = BitConverter.ToUInt32(m_encodedData, GbixOffset + 0x08);
}
else
{
GlobalIndex = 0;
}
// Read information about the texture
TextureWidth = BitConverter.ToUInt16(m_encodedData, PvrtOffset + 0x0C);
TextureHeight = BitConverter.ToUInt16(m_encodedData, PvrtOffset + 0x0E);
PixelFormat = (PvrPixelFormat)m_encodedData[PvrtOffset + 0x08];
DataFormat = (PvrDataFormat)m_encodedData[PvrtOffset + 0x09];
// Get the codecs and make sure we can decode using them
PixelCodec = PvrPixelCodec.GetPixelCodec(PixelFormat);
DataCodec = PvrDataCodec.GetDataCodec(DataFormat);
if (DataCodec != null && PixelCodec != null)
{
DataCodec.PixelCodec = PixelCodec;
}
// Set the number of palette entries
// The number in a Small Vq encoded texture various based on its size
m_paletteEntries = DataCodec.PaletteEntries;
if (DataFormat == PvrDataFormat.VECTOR_QUANTIZATION_SMALL || DataFormat == PvrDataFormat.VECTOR_QUANTIZATION_SMALL_MIPMAP)
{
if (TextureWidth <= 16)
{
m_paletteEntries = 64; // Actually 16
}
else if (TextureWidth <= 32)
{
m_paletteEntries = 256; // Actually 64
}
else if (TextureWidth <= 64)
{
m_paletteEntries = 512; // Actually 128
}
else
{
m_paletteEntries = 1024; // Actually 256
}
}
// Set the palette and data offsets
if (m_paletteEntries == 0 || DataCodec.NeedsExternalPalette)
{
m_paletteOffset = -1;
m_dataOffset = PvrtOffset + 0x10;
}
else
{
m_paletteOffset = PvrtOffset + 0x10;
m_dataOffset = m_paletteOffset + (m_paletteEntries * (PixelCodec.Bpp >> 3));
}
// Get the compression format and determine if we need to decompress this texture
CompressionFormat = GetCompressionFormat(m_encodedData, PvrtOffset, m_dataOffset);
CompressionCodec = PvrCompressionCodec.GetCompressionCodec(CompressionFormat);
if (CompressionFormat != PvrCompressionFormat.NONE && CompressionCodec != null)
{
m_encodedData = CompressionCodec.Decompress(m_encodedData, m_dataOffset, PixelCodec, DataCodec);
// Now place the offsets in the appropiate area
if (CompressionFormat == PvrCompressionFormat.RLE)
{
if (GbixOffset != -1)
{
GbixOffset -= 4;
}
PvrtOffset -= 4;
if (m_paletteOffset != -1)
{
m_paletteOffset -= 4;
}
m_dataOffset -= 4;
}
}
// If the texture contains mipmaps, gets the offsets of them
if (DataCodec.HasMipmaps)
{
m_mipmapOffsets = new int[(int)Math.Log(TextureWidth, 2) + 1];
int mipmapOffset = 0;
// Calculate the padding for the first mipmap offset
if (DataFormat == PvrDataFormat.SQUARE_TWIDDLED_MIPMAP)
{
// A 1x1 mipmap takes up as much space as a 2x1 mipmap
mipmapOffset = (DataCodec.Bpp) >> 3;
}
else if (DataFormat == PvrDataFormat.SQUARE_TWIDDLED_MIPMAP_ALT)
{
// A 1x1 mipmap takes up as much space as a 2x2 mipmap
mipmapOffset = (3 * DataCodec.Bpp) >> 3;
}
for (int i = m_mipmapOffsets.Length - 1, size = 1; i >= 0; i--, size <<= 1)
{
m_mipmapOffsets[i] = mipmapOffset;
mipmapOffset += Math.Max((size * size * DataCodec.Bpp) >> 3, 1);
}
}
}
private bool Initalize(PvrPixelFormat pixelFormat, PvrDataFormat dataFormat)
{
// Set the default values
hasGlobalIndex = true;
globalIndex = 0;
compressionFormat = PvrCompressionFormat.None;
// Set the data format and pixel format and load the appropiate codecs
this.pixelFormat = pixelFormat;
pixelCodec = PvrPixelCodec.GetPixelCodec(pixelFormat);
this.dataFormat = dataFormat;
dataCodec = PvrDataCodec.GetDataCodec(dataFormat);
// Make sure the pixel and data codecs exists and we can encode to it
if (pixelCodec == null || !pixelCodec.CanEncode) return false;
if (dataCodec == null || !dataCodec.CanEncode) return false;
dataCodec.PixelCodec = pixelCodec;
if (dataCodec.PaletteEntries != 0)
{
// Convert the bitmap to an array containing indicies.
decodedData = BitmapToRawIndexed(decodedBitmap, dataCodec.PaletteEntries, out texturePalette);
// If this texture has an external palette file, set up the palette encoder
if (dataCodec.NeedsExternalPalette)
{
paletteEncoder = new PvpPaletteEncoder(texturePalette, (ushort)dataCodec.PaletteEntries, pixelFormat, pixelCodec);
}
}
else
{
// Convert the bitmap to an array
decodedData = BitmapToRaw(decodedBitmap);
}
return true;
}
// Initalize the bitmap
private bool Initalize()
{
// Make sure the width and height are correct
if (TextureWidth < 8 || TextureHeight < 8) return false;
if ((TextureWidth & (TextureWidth - 1)) != 0 || (TextureHeight & (TextureHeight - 1)) != 0)
return false;
PixelCodec = PvrCodecList.GetPixelCodec((PvrPixelFormat)PixelFormat);
DataCodec = PvrCodecList.GetDataCodec((PvrDataFormat)DataFormat);
CompressionFormat = PvrCompressionFormat.None;
CompressionCodec = null;
if (PixelCodec == null || DataCodec == null) return false;
if (!PixelCodec.CanEncode() || !DataCodec.CanEncode()) return false;
if (!CanEncode((PvrPixelFormat)PixelFormat, (PvrDataFormat)DataFormat, TextureWidth, TextureHeight)) return false;
GbixOffset = 0x00;
PvrtOffset = 0x10;
// See if we need to palettize the bitmap and raw image data
if (DataCodec.GetNumClutEntries() != 0)
PalettizeBitmap();
return true;
}
/// <summary>
/// Set the compression format.
/// </summary>
/// <param name="CompressionFormat">Compression Format</param>
public void SetCompressionFormat(PvrCompressionFormat CompressionFormat)
{
if (!InitSuccess) return;
if (CompressionFormat == PvrCompressionFormat.Rle && DataCodec.GetBpp(PixelCodec) >= 8)
{
// We want to use Rle compression and our texture has a bpp of at least 8.
CompressionCodec = PvrCodecList.GetCompressionCodec(CompressionFormat);
if (CompressionCodec != null)
this.CompressionFormat = PvrCompressionFormat.Rle;
else
return; // Can't compress!
}
}
// Read the header and sets up the appropiate values.
// Returns true if successful, otherwise false
private bool ReadHeader()
{
// Make sure this is a Pvr Texture
if (!IsPvrTexture(TextureData))
return false;
// Get the header offsets
if (Compare(TextureData, "GBIX", 0x00))
{
GbixOffset = 0x00;
PvrtOffset = 0x10;
}
else if (Compare(TextureData, "GBIX", 0x04))
{
GbixOffset = 0x04;
PvrtOffset = 0x14;
}
else if (Compare(TextureData, "PVRT", 0x04))
{
GbixOffset = -1;
PvrtOffset = 0x04;
}
else
{
GbixOffset = -1;
PvrtOffset = 0x00;
}
// Read the file information
TextureWidth = BitConverter.ToUInt16(TextureData, PvrtOffset + 0x0C);
TextureHeight = BitConverter.ToUInt16(TextureData, PvrtOffset + 0x0E);
PixelFormat = TextureData[PvrtOffset + 0x08];
DataFormat = TextureData[PvrtOffset + 0x09];
// Get the codecs and make sure we can decode using them
PixelCodec = PvrCodecList.GetPixelCodec((PvrPixelFormat)PixelFormat);
DataCodec = PvrCodecList.GetDataCodec((PvrDataFormat)DataFormat);
if (PixelCodec == null || !PixelCodec.CanDecode()) return false;
if (DataCodec == null || !DataCodec.CanDecode()) return false;
// Set the clut and data offsets
if (DataCodec.GetNumClutEntries() == 0 || DataCodec.NeedsExternalClut())
{
ClutOffset = -1;
DataOffset = PvrtOffset + 0x10;
}
else
{
ClutOffset = PvrtOffset + 0x10;
DataOffset = ClutOffset + (DataCodec.GetNumClutEntries() * (PixelCodec.GetBpp() / 8));
}
// Get the compression format & decompress the pvr
CompressionFormat = GetCompressionFormat(TextureData, PvrtOffset, DataOffset);
CompressionCodec = PvrCodecList.GetCompressionCodec(CompressionFormat);
if (CompressionFormat != PvrCompressionFormat.None && CompressionCodec != null)
{
TextureData = CompressionCodec.Decompress(TextureData, DataOffset, PixelCodec, DataCodec);
// Now place the offsets in the appropiate area
if (CompressionFormat == PvrCompressionFormat.Rle)
{
if (GbixOffset != -1) GbixOffset -= 4;
PvrtOffset -= 4;
if (ClutOffset != -1) ClutOffset -= 4;
DataOffset -= 4;
}
}
RawImageData = new byte[TextureWidth * TextureHeight * 4];
return true;
}
/// <summary>
/// Opens a texture to encode from a bitmap.
/// </summary>
/// <param name="source">Bitmap to encode.</param>
/// <param name="pixelFormat">Pixel format to encode the texture to.</param>
/// <param name="dataFormat">Data format to encode the texture to.</param>
public PvrTextureEncoder(Bitmap source, PvrPixelFormat pixelFormat, PvrDataFormat dataFormat, uint globalIndex, PvrCompressionFormat compression)
: base(source)
{
if (decodedBitmap != null)
{
initalized = Initalize(pixelFormat, dataFormat, globalIndex, compressionFormat);
}
}
