public override Image Load(Stream s)
{
BitMiracle.LibJpeg.JpegImage j = new BitMiracle.LibJpeg.JpegImage(s);
Image i = (Image)j.ToBitmap();
j.Dispose();
System.GC.Collect();
return i;
}
public override Image Load(Stream s)
{
BitMiracle.LibJpeg.JpegImage j = new BitMiracle.LibJpeg.JpegImage(s);
Image i = (Image)j.ToBitmap();
j.Dispose();
System.GC.Collect();
return(i);
}
public override void Save(Image i, Stream dest)
{
BitMiracle.LibJpeg.JpegImage j = BitMiracle.LibJpeg.JpegImage.FromBitmap((System.Drawing.Bitmap)i);
CompressionParameters c = new CompressionParameters();
c.Quality = 100;
c.SimpleProgressive = false;
j.WriteJpeg(dest, c);
j.Dispose();
System.GC.Collect();
}
/// <summary>
/// Decodes the image from the specified stream and sets
/// the data to image.
/// </summary>
/// <param name="image">The image, where the data should be set to.
/// Cannot be null (Nothing in Visual Basic).</param>
/// <param name="stream">The stream, where the image should be
/// decoded from. Cannot be null (Nothing in Visual Basic).</param>
/// <exception cref="System.ArgumentNullException">
/// <para><paramref name="image"/> is null (Nothing in Visual Basic).</para>
/// <para>- or -</para>
/// <para><paramref name="stream"/> is null (Nothing in Visual Basic).</para>
/// </exception>
public void Decode(Image image, Stream stream)
{
Guard.NotNull(image, "image");
Guard.NotNull(stream, "stream");
JpegImage jpg = new JpegImage(stream);
int pixelWidth = jpg.Width;
int pixelHeight = jpg.Height;
float[] pixels = new float[pixelWidth * pixelHeight * 4];
if (jpg.Colorspace == Colorspace.RGB && jpg.BitsPerComponent == 8)
{
Parallel.For(
0,
pixelHeight,
y =>
{
SampleRow row = jpg.GetRow(y);
for (int x = 0; x < pixelWidth; x++)
{
Sample sample = row.GetAt(x);
int offset = ((y * pixelWidth) + x) * 4;
pixels[offset + 0] = sample[0] / 255f;
pixels[offset + 1] = sample[1] / 255f;
pixels[offset + 2] = sample[2] / 255f;
pixels[offset + 3] = 1;
}
});
}
else if (jpg.Colorspace == Colorspace.Grayscale && jpg.BitsPerComponent == 8)
{
Parallel.For(
0,
pixelHeight,
y =>
{
SampleRow row = jpg.GetRow(y);
for (int x = 0; x < pixelWidth; x++)
{
Sample sample = row.GetAt(x);
int offset = ((y * pixelWidth) + x) * 4;
pixels[offset + 0] = sample[0] / 255f;
pixels[offset + 1] = sample[0] / 255f;
pixels[offset + 2] = sample[0] / 255f;
pixels[offset + 3] = 1;
}
});
}
else
{
throw new NotSupportedException("JpegDecoder only supports RGB and Grayscale color spaces.");
}
image.SetPixels(pixelWidth, pixelHeight, pixels);
jpg.Dispose();
}
