public ImageInformation GetImageInformation(TxfHeader pixelDataHeader, TxfHeader paletteDataHeader)
{
ImageInformation image = Images.FirstOrDefault(x => x.PixelDataHeader == pixelDataHeader && x.PaletteDataHeader == paletteDataHeader);
if (image != null)
{
return(image);
}
using (MemoryStream tempStream = new MemoryStream(rawData.ToArray()))
{
using (EndianBinaryReader tempReader = new EndianBinaryReader(tempStream, Endian.BigEndian))
{
return(ConvertImage(tempReader, pixelDataHeader, paletteDataHeader));
}
}
}
private ImageInformation ConvertImage(EndianBinaryReader reader, TxfHeader pixelDataHeader, TxfHeader paletteDataHeader)
{
PixelFormat pixelFormat;
byte[] pixelData = null, paletteData = null;
long pixelDataOffset = -1, paletteDataOffset = -1;
/* Seek to the beginning of the pixel data block */
pixelDataOffset = (StartPosition + (PixelDataHeaders.Count * TxfHeader.Size) + (PaletteDataHeaders.Count * TxfHeader.Size) + (pixelDataHeader.IsIndexedImage ? pixelDataHeader.Offset : 0));
reader.BaseStream.Seek(pixelDataOffset, SeekOrigin.Begin);
/* Determine pixel format & read/convert pixel data */
switch (pixelDataHeader.Format)
{
case TxfDataFormat.Argb8888:
{
pixelFormat = PixelFormat.Format32bppArgb;
pixelData = GetPixelData(reader, pixelDataHeader.Format, CalculatePixelDataSize(pixelDataHeader.Format, pixelDataHeader.Width, pixelDataHeader.Height));
}
break;
case TxfDataFormat.RgbaDxt1:
case TxfDataFormat.RgbaDxt3:
case TxfDataFormat.RgbaDxt5:
{
pixelFormat = PixelFormat.Format32bppArgb;
pixelData = DecompressDxt(reader, pixelDataHeader.Format, pixelDataHeader.Width, pixelDataHeader.Height);
}
break;
case TxfDataFormat.Indexed8bpp:
{
pixelFormat = PixelFormat.Format8bppIndexed;
pixelData = GetPixelData(reader, pixelDataHeader.Format, CalculatePixelDataSize(pixelDataHeader.Format, pixelDataHeader.Width, pixelDataHeader.Height));
}
break;
case TxfDataFormat.Argb1555:
{
pixelFormat = PixelFormat.Format16bppArgb1555;
pixelData = GetPixelData(reader, pixelDataHeader.Format, pixelDataHeader.Offset);
}
break;
case TxfDataFormat.Argb4444:
{
pixelFormat = PixelFormat.Format32bppArgb;
byte[] tempData = GetPixelData(reader, pixelDataHeader.Format, CalculatePixelDataSize(pixelDataHeader.Format, pixelDataHeader.Width, pixelDataHeader.Height));
pixelData = new byte[tempData.Length << 1];
for (int i = 0, j = 0; i < tempData.Length; i += 2, j += 4)
{
pixelData[j + 0] = (byte)((tempData[i] & 0x0F) | ((tempData[i] & 0x0F) << 4));
pixelData[j + 1] = (byte)((tempData[i] & 0xF0) | ((tempData[i] & 0xF0) >> 4));
pixelData[j + 2] = (byte)((tempData[i + 1] & 0x0F) | ((tempData[i + 1] & 0x0F) << 4));
pixelData[j + 3] = (byte)((tempData[i + 1] & 0xF0) | ((tempData[i + 1] & 0xF0) >> 4));
}
}
break;
case TxfDataFormat.Rgb565:
{
pixelFormat = PixelFormat.Format16bppRgb565;
pixelData = GetPixelData(reader, pixelDataHeader.Format, pixelDataHeader.Offset);
}
break;
default:
throw new Exception("Unsupported pixel data format.");
}
/* If we were given a palette data block header, seek to & read the palette data, too! */
if (paletteDataHeader != null)
{
paletteDataOffset = StartPosition + (PixelDataHeaders.Count * TxfHeader.Size) + (PaletteDataHeaders.Count * TxfHeader.Size) + paletteDataHeader.Offset;
reader.BaseStream.Seek(paletteDataOffset, SeekOrigin.Begin);
paletteData = GetPixelData(reader, paletteDataHeader.Format, CalculatePaletteDataSize(pixelDataHeader.Format, paletteDataHeader.Format));
}
/* Generate the final bitmap */
Bitmap bitmap = new Bitmap(pixelDataHeader.Width, pixelDataHeader.Height, pixelFormat);
BitmapData bmpData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.WriteOnly, bitmap.PixelFormat);
Marshal.Copy(pixelData, 0, bmpData.Scan0, pixelData.Length);
bitmap.UnlockBits(bmpData);
/* Apply palette if necessary */
if (paletteDataHeader != null && paletteData != null)
{
ApplyColorPalette(bitmap, paletteData, paletteDataHeader.Format);
}
ImageInformation imageInfos = new ImageInformation(pixelDataHeader, paletteDataHeader, bitmap)
{
ImageOffset = pixelDataOffset, PaletteOffset = paletteDataOffset
};
Images.Add(imageInfos);
return(imageInfos);
}
public ImageInformation(TxfHeader pixelDataHeader, TxfHeader paletteHeader, Bitmap bitmap)
{
PixelDataHeader = pixelDataHeader;
PaletteDataHeader = paletteHeader;
Bitmap = bitmap;
}
