/// <summary>
/// Opens a texture to encode from a stream.
/// </summary>
/// <param name="source">Stream that contains the texture data.</param>
/// <param name="length">Number of bytes to read.</param>
/// <param name="pixelFormat">Pixel format to encode the texture to.</param>
/// <param name="dataFormat">Data format to encode the texture to.</param>
public GimTextureEncoder(Stream source, int length, GimPaletteFormat paletteFormat, GimDataFormat dataFormat)
{
MemoryStream buffer = new MemoryStream();
PTStream.CopyPartTo(source, buffer, length);
initalized = Initalize(new Bitmap(buffer), paletteFormat, dataFormat);
}
/// <summary>
/// Saves the encoded texture to the specified stream.
/// </summary>
/// <param name="destination">The stream to save the texture to.</param>
public void Save(Stream destination)
{
if (!initalized)
{
throw new TextureNotInitalizedException("Cannot encode this texture as it is not initalized.");
}
MemoryStream textureStream = EncodeTexture();
textureStream.Position = 0;
PTStream.CopyTo(textureStream, destination);
}
/// <summary>
/// Saves the encoded texture to the specified path.
/// </summary>
/// <param name="path">Name of the file to save the data to.</param>
public void Save(string path)
{
if (!initalized)
{
throw new TextureNotInitalizedException("Cannot encode this texture as it is not initalized.");
}
using (FileStream destination = File.Create(path))
{
MemoryStream textureStream = EncodeTexture();
textureStream.Position = 0;
PTStream.CopyTo(textureStream, destination);
}
}
// Encodes a texture
private MemoryStream EncodeTexture()
{
// Get the lengths of the various chunks
int eofOffsetChunkLength = 16,
metadataOffsetChunkLength = 16,
paletteDataChunkLength = 0,
textureDataChunkLength = 0,
metadataChunkLength = 0;
if (dataCodec.PaletteEntries != 0)
{
paletteDataChunkLength = 80 + (dataCodec.PaletteEntries * (pixelCodec.Bpp >> 3));
}
textureDataChunkLength = 80 + ((textureWidth * textureHeight * dataCodec.Bpp) >> 3);
if (hasMetadata)
{
metadataChunkLength = 16;
if (metadata.OriginalFilename != null)
{
metadataChunkLength += metadata.OriginalFilename.Length;
}
metadataChunkLength++;
if (metadata.User != null)
{
metadataChunkLength += metadata.User.Length;
}
metadataChunkLength++;
if (metadata.Timestamp != null)
{
metadataChunkLength += metadata.Timestamp.Length;
}
metadataChunkLength++;
if (metadata.Program != null)
{
metadataChunkLength += metadata.Program.Length;
}
metadataChunkLength++;
}
// Calculate what the length of the texture will be
int textureLength = 16 +
eofOffsetChunkLength +
metadataOffsetChunkLength +
paletteDataChunkLength +
textureDataChunkLength +
metadataChunkLength;
MemoryStream destination = new MemoryStream(textureLength);
// Write the GIM header
PTStream.WriteCString(destination, "MIG.00.1PSP", 12);
PTStream.WriteUInt32(destination, 0);
// Write the EOF offset chunk
PTStream.WriteUInt16(destination, 0x02);
PTStream.WriteUInt16(destination, 0);
PTStream.WriteInt32(destination, textureLength - 16);
PTStream.WriteInt32(destination, eofOffsetChunkLength);
PTStream.WriteUInt32(destination, 16);
// Write the metadata offset chunk
PTStream.WriteUInt16(destination, 0x03);
PTStream.WriteUInt16(destination, 0);
if (hasMetadata)
{
PTStream.WriteInt32(destination, textureLength - metadataChunkLength - 32);
}
else
{
PTStream.WriteInt32(destination, textureLength - 32);
}
PTStream.WriteInt32(destination, metadataOffsetChunkLength);
PTStream.WriteUInt32(destination, 16);
// Write the palette data, if we have a palette
if (dataCodec.PaletteEntries != 0)
{
PTStream.WriteUInt16(destination, 0x05);
PTStream.WriteUInt16(destination, 0);
PTStream.WriteInt32(destination, paletteDataChunkLength);
PTStream.WriteInt32(destination, paletteDataChunkLength);
PTStream.WriteUInt32(destination, 16);
PTStream.WriteUInt16(destination, 48);
PTStream.WriteUInt16(destination, 0);
PTStream.WriteUInt16(destination, (byte)paletteFormat);
PTStream.WriteUInt16(destination, 0);
PTStream.WriteUInt16(destination, (ushort)dataCodec.PaletteEntries);
destination.Write(new byte[] { 0x01, 0x00, 0x20, 0x00, 0x10, 0x00 }, 0, 6);
destination.Write(new byte[] { 0x01, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0, 8);
PTStream.WriteUInt32(destination, 0x30);
PTStream.WriteUInt32(destination, 0x40);
PTStream.WriteInt32(destination, paletteDataChunkLength - 16);
PTStream.WriteUInt32(destination, 0);
destination.Write(new byte[] { 0x02, 0x00, 0x01, 0x00, 0x03, 0x00, 0x01, 0x00 }, 0, 8);
destination.Write(new byte[] { 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0, 16);
byte[] palette = pixelCodec.EncodePalette(texturePalette, dataCodec.PaletteEntries);
destination.Write(palette, 0, palette.Length);
}
// Write the texture data
PTStream.WriteUInt16(destination, 0x04);
PTStream.WriteUInt16(destination, 0);
PTStream.WriteInt32(destination, textureDataChunkLength);
PTStream.WriteInt32(destination, textureDataChunkLength);
PTStream.WriteUInt32(destination, 16);
PTStream.WriteUInt16(destination, 48);
PTStream.WriteUInt16(destination, 0);
PTStream.WriteUInt16(destination, (byte)dataFormat);
PTStream.WriteUInt16(destination, 1); // Always swizzled
PTStream.WriteUInt16(destination, textureWidth);
PTStream.WriteUInt16(destination, textureHeight);
if (dataCodec.PaletteEntries != 0)
{
// For palettized textures, this is the bpp for this data format
PTStream.WriteUInt16(destination, (ushort)dataCodec.Bpp);
}
else
{
// For non-palettized textures, this is always specified as 32bpp
PTStream.WriteUInt16(destination, 32);
}
PTStream.WriteUInt16(destination, 16);
destination.Write(new byte[] { 0x08, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00 }, 0, 16);
PTStream.WriteInt32(destination, textureDataChunkLength - 16);
PTStream.WriteUInt32(destination, 0);
destination.Write(new byte[] { 0x01, 0x00, 0x01, 0x00, 0x03, 0x00, 0x01, 0x00 }, 0, 8);
destination.Write(new byte[] { 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0, 16);
byte[] textureData = GimDataCodec.Swizzle(dataCodec.Encode(decodedData, 0, textureWidth, textureHeight), 0, textureWidth, textureHeight, dataCodec.Bpp);
destination.Write(textureData, 0, textureData.Length);
// Write the metadata, only if we are including it
if (hasMetadata)
{
PTStream.WriteUInt16(destination, 0xFF);
PTStream.WriteUInt16(destination, 0);
PTStream.WriteInt32(destination, metadataChunkLength);
PTStream.WriteInt32(destination, metadataChunkLength);
PTStream.WriteUInt32(destination, 16);
PTStream.WriteCString(destination, metadata.OriginalFilename);
PTStream.WriteCString(destination, metadata.User);
PTStream.WriteCString(destination, metadata.Timestamp);
PTStream.WriteCString(destination, metadata.Program);
}
return(destination);
}
