/// <summary>
/// Encodes the data of the specified image and writes the result to
/// the specified stream.
/// </summary>
/// <param name="image">The image, where the data should be get from.
/// Cannot be null (Nothing in Visual Basic).</param>
/// <param name="stream">The stream, where the image data should be written to.
/// 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 Encode(ExtendedImage image, Stream stream)
{
Guard.NotNull(image, "image");
Guard.NotNull(stream, "stream");
const int bands = 3;
int pixelWidth = image.PixelWidth;
int pixelHeight = image.PixelHeight;
byte[] sourcePixels = image.Pixels;
byte[][,] pixels = new byte[bands][, ];
for (int b = 0; b < bands; b++)
{
pixels[b] = new byte[pixelWidth, pixelHeight];
}
for (int y = 0; y < pixelHeight; y++)
{
for (int x = 0; x < pixelWidth; x++)
{
int offset = (y * pixelWidth + x) * 4;
float a = (float)sourcePixels[offset + 3] / 255.0f;
pixels[0][x, y] = (byte)(sourcePixels[offset + 0] * a + (1 - a) * _transparentColor.R);
pixels[1][x, y] = (byte)(sourcePixels[offset + 1] * a + (1 - a) * _transparentColor.G);
pixels[2][x, y] = (byte)(sourcePixels[offset + 2] * a + (1 - a) * _transparentColor.B);
}
}
Image newImage = new Image(new ColorModel {
ColorSpace = ColorSpace.RGB, Opaque = false
}, pixels);
if (image.DensityX > 0 && image.DensityY > 0)
{
newImage.DensityX = image.DensityX;
newImage.DensityY = image.DensityY;
}
// Create a jpg image from the image object.
DecodedJpeg jpg = new DecodedJpeg(newImage);
// Create a new encoder and start encoding.
FluxCoreJpegEncoder fluxCoreJpegEncoder = new FluxCoreJpegEncoder(jpg, _quality, stream);
fluxCoreJpegEncoder.Encode();
}
/// <summary>
/// Encodes the data of the specified image and writes the result to
/// the specified stream.
/// </summary>
/// <param name="image">The image, where the data should be get from.
/// Cannot be null (Nothing in Visual Basic).</param>
/// <param name="stream">The stream, where the image data should be written to.
/// 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 Encode(ExtendedImage image, Stream stream)
{
Guard.NotNull(image, "image");
Guard.NotNull(stream, "stream");
const int bands = 3;
int pixelWidth = image.PixelWidth;
int pixelHeight = image.PixelHeight;
byte[] sourcePixels = image.Pixels;
byte[][,] pixels = new byte[bands][,];
for (int b = 0; b < bands; b++)
{
pixels[b] = new byte[pixelWidth, pixelHeight];
}
for (int y = 0; y < pixelHeight; y++)
{
for (int x = 0; x < pixelWidth; x++)
{
int offset = (y * pixelWidth + x) * 4;
float a = (float)sourcePixels[offset + 3] / 255.0f;
pixels[0][x, y] = (byte)(sourcePixels[offset + 0] * a + (1 - a) * _transparentColor.R);
pixels[1][x, y] = (byte)(sourcePixels[offset + 1] * a + (1 - a) * _transparentColor.G);
pixels[2][x, y] = (byte)(sourcePixels[offset + 2] * a + (1 - a) * _transparentColor.B);
}
}
Image newImage = new Image(new ColorModel { ColorSpace = ColorSpace.RGB, Opaque = false }, pixels);
if (image.DensityXInt32 > 0 && image.DensityYInt32 > 0)
{
newImage.DensityX = image.DensityXInt32;
newImage.DensityY = image.DensityYInt32;
}
// Create a jpg image from the image object.
DecodedJpeg jpg = new DecodedJpeg(newImage);
// Create a new encoder and start encoding.
FluxCoreJpegEncoder fluxCoreJpegEncoder = new FluxCoreJpegEncoder(jpg, _quality, stream);
fluxCoreJpegEncoder.Encode();
}
