internal static Bitmap Parse(BinaryReader reader, ImageHeader header, bool ignoreAlpha = false)
{
var Result = new Bitmap(header.Width, header.Height, PixelFormat.Format32bppArgb);
try
{
var Raw = Result.LockBits(new Rectangle(0, 0, Result.Width, Result.Height), ImageLockMode.WriteOnly, Result.PixelFormat);
var PixelCount = header.Height * header.Width;
unsafe
{
var Buffer = (byte*)Raw.Scan0;
Color[] Palette = null;
byte[] BitFields = null;
bool EightCount = header.BitCount == 8;
if (EightCount)
{ // 8-bit, with palette
Palette = new Color[256];
for (var i = 0; i < 256; ++i)
{
Palette[i] = ReadColor(reader, 32);
}
BitFields = reader.ReadBytes(PixelCount);
}
for (var Pixel = 0; Pixel < PixelCount; ++Pixel)
{
var Color = EightCount ? Palette[BitFields[Pixel]] : ReadColor(reader, header.BitCount);
Buffer[4 * Pixel + 0] = Color.B;
Buffer[4 * Pixel + 1] = Color.G;
Buffer[4 * Pixel + 2] = Color.R;
Buffer[4 * Pixel + 3] = ignoreAlpha ? (byte)255 : Color.A;
}
}
Result.UnlockBits(Raw);
Result.RotateFlip(RotateFlipType.RotateNoneFlipY);
}
catch
{
Result.Dispose();
throw;
}
return Result;
}
internal static Bitmap Parse(BinaryReader reader, ImageHeader header, bool ignoreAlpha = false)
{
var Format = (header.Type == ImageType.DXT2 || header.Type == ImageType.DXT4) ? PixelFormat.Format32bppPArgb : PixelFormat.Format32bppArgb;
var Result = new Bitmap(header.Width, header.Height, Format);
try
{
var Raw = Result.LockBits(new Rectangle(0, 0, Result.Width, Result.Height), ImageLockMode.WriteOnly, Result.PixelFormat);
var TexelBlockCount = (header.Width * header.Height) / (4 * 4);
unsafe
{
var Buffer = (byte*)Raw.Scan0;
for (var Texel = 0; Texel < TexelBlockCount; ++Texel)
{
var TexelBlock = ReadTexelBlock(reader, header.Type);
var PixelOffsetX = 4 * (Texel % (header.Width / 4));
var PixelOffsetY = 4 * (Texel / (header.Width / 4)) * (Raw.Stride / 4);
var Index = 4 * (PixelOffsetX + PixelOffsetY);
for (var Y = 0; Y < 4; ++Y, Index += Raw.Stride - 16)
{
for (var X = 0; X < 4; ++X, Index += 4)
{
var Lookup = X + 4 * Y;
Buffer[Index + 0] = TexelBlock[Lookup].B;
Buffer[Index + 1] = TexelBlock[Lookup].G;
Buffer[Index + 2] = TexelBlock[Lookup].R;
Buffer[Index + 3] = ignoreAlpha ? (byte)255 : TexelBlock[Lookup].A;
}
}
}
}
Result.UnlockBits(Raw);
}
catch
{
Result.Dispose();
throw;
}
return Result;
}
