public static WriteableBitmap DecodeJpeg(Stream srcStream)
{
// Decode JPEG
var decoder = new FluxJpeg.Core.Decoder.JpegDecoder(srcStream);
var jpegDecoded = decoder.Decode();
var img = jpegDecoded.Image;
img.ChangeColorSpace(ColorSpace.RGB);
// Init Buffer
int w = img.Width;
int h = img.Height;
var result = new WriteableBitmap(w, h);
int[] p = result.Pixels;
byte[][,] pixelsFromJpeg = img.Raster;
// Copy FluxJpeg buffer into WriteableBitmap
int i = 0;
for (int x = 0; x < w; x++)
{
for (int y = 0; y < h; y++)
{
p[i++] = (0xFF << 24) // A
| (pixelsFromJpeg[0][x, y] << 16) // R
| (pixelsFromJpeg[1][x, y] << 8) // G
| pixelsFromJpeg[2][x, y]; // B
}
}
return(result);
}
public static WriteableBitmap DecodeJpeg(Stream srcStream)
{
// Decode JPEG
var decoder = new FluxJpeg.Core.Decoder.JpegDecoder(srcStream);
var jpegDecoded = decoder.Decode();
var img = jpegDecoded.Image;
img.ChangeColorSpace(ColorSpace.RGB);
// Init Buffer
int w = img.Width;
int h = img.Height;
var result = new WriteableBitmap(w, h);
int[] p = result.Pixels;
byte[][,] pixelsFromJpeg = img.Raster;
// Copy FluxJpeg buffer into WriteableBitmap
int i = 0;
for (int x = 0; x < w; x++)
{
for (int y = 0; y < h; y++)
{
p[i++] = (0xFF << 24) // A
| (pixelsFromJpeg[0][x, y] << 16) // R
| (pixelsFromJpeg[1][x, y] << 8) // G
| pixelsFromJpeg[2][x, y]; // B
}
}
return result;
}
/// Raises TiltBrush.ImageDecodeError if the data is not a valid jpeg
static public RawImage FromJpeg(byte[] jpegData, string filename)
{
using (var stream = new MemoryStream(jpegData))
{
FluxJpeg.Core.Image image;
try
{
FluxJpeg.Core.DecodedJpeg decoded =
new FluxJpeg.Core.Decoder.JpegDecoder(stream).Decode();
image = decoded.Image;
image.ChangeColorSpace(FluxJpeg.Core.ColorSpace.RGB);
}
catch (Exception e)
{
// Library throws bare Exception :-P
throw new ImageLoadError(e, "JPEG decode error");
}
var reds = image.Raster[0];
var greens = image.Raster[1];
var blues = image.Raster[2];
int _width = image.Width;
int _height = image.Height;
var buf = new Color32[_width * _height];
unsafe
{
unchecked
{
fixed(Color32 *pBuf = buf)
{
byte *cur = (byte *)pBuf;
for (int y = _height - 1; y >= 0; --y)
{
for (int x = 0; x < _width; ++x)
{
cur[0] = reds[x, y];
cur[1] = greens[x, y];
cur[2] = blues[x, y];
cur[3] = 0xff;
cur += 4;
}
}
}
}
}
return(new RawImage
{
ColorData = buf,
ColorWidth = _width,
ColorHeight = _height,
ColorAspect = _height == 0 ? 1f : ((float)_width / _height)
});
}
}
