public static ImageSource Decode(byte[] data, TgaHeader tgaHeader, int size)
{
var imageDataOffset = RgbBufferDecoder.GetImageDataOffset(tgaHeader);
var numberOfPixels = RgbBufferDecoder.GetStride(tgaHeader) * tgaHeader.Height;
var imageBuffer = data.Skip(imageDataOffset).Take(numberOfPixels).ToArray();
return(RgbBufferDecoder.Decode(tgaHeader, imageBuffer, size));
}
private static byte[] GetImageBuffer(byte[] data, TgaHeader tgaHeader)
{
var imageDataOffset = RgbBufferDecoder.GetImageDataOffset(tgaHeader);
var bytesPerPixel = RgbBufferDecoder.GetBytesPerPixel(tgaHeader);
var pixelsToDecode = tgaHeader.Width * tgaHeader.Height;
var outBuffer = new byte[pixelsToDecode * bytesPerPixel];
for (int i = 0, inOffset = imageDataOffset, outOffset = 0; i < pixelsToDecode;)
{
var header = data[inOffset++];
var pixelCount = GetPixelCount(header);
if (IsRle(header))
{
for (int count = 0; count < pixelCount; count++)
{
Array.Copy(data, inOffset, outBuffer, outOffset, bytesPerPixel);
outOffset += bytesPerPixel;
}
inOffset += bytesPerPixel;
}
else
{
var pixelsBytesLength = pixelCount * bytesPerPixel;
Array.Copy(data, inOffset, outBuffer, outOffset, pixelsBytesLength);
inOffset += pixelsBytesLength;
outOffset += pixelsBytesLength;
}
i += pixelCount;
}
return(outBuffer);
}
public static ImageSource Decode(byte[] data, TgaHeader tgaHeader, int size)
{
var imageBuffer = GetImageBuffer(data, tgaHeader);
return(RgbBufferDecoder.Decode(tgaHeader, imageBuffer, size));
}