public void Change(Bitmap image, IImageFilter filter)
{
foreach (var pixel in image.GetPixels())
{
var newColor = filter.Apply(pixel.Color);
image.SetPixel(pixel.X, pixel.Y, newColor);
}
}
/// <summary>
/// Converts the image to a silverlight bitmap, which can be assigned
/// to a image control.
/// </summary>
/// <param name="image">The image, which should be converted. Cannot be null
/// (Nothing in Visual Basic).</param>
/// <param name="filter">The filter, which should be applied before converting the
/// image or null, if no filter should be applied to. Cannot be null.</param>
/// <returns>The resulting bitmap.</returns>
/// <exception cref="ArgumentNullException"><paramref name="filter"/> is null
/// (Nothing in Visual Basic).</exception>
public static WriteableBitmap ToBitmap(this ImageBase image, IImageFilter filter)
{
Contract.Requires <ArgumentNullException>(image != null, "Image cannot be null.");
Contract.Requires <ArgumentException>(image.IsFilled, "Image has not been loaded.");
WriteableBitmap bitmap = new WriteableBitmap(image.PixelWidth, image.PixelHeight);
ImageBase temp = image;
if (filter != null)
{
temp = new ImageBase(image);
filter.Apply(temp, image, temp.Bounds);
}
byte[] pixels = temp.Pixels;
if (pixels != null)
{
int[] raster = bitmap.Pixels;
if (raster != null)
{
Buffer.BlockCopy(pixels, 0, raster, 0, pixels.Length);
for (int i = 0; i < raster.Length; i++)
{
int abgr = raster[i];
int a = (abgr >> 24) & 0xff;
float m = a / 255f;
int argb = a << 24 |
(int)(((abgr >> 0) & 0xff) * m) << 16 |
(int)(((abgr >> 8) & 0xff) * m) << 8 |
(int)(((abgr >> 16) & 0xff) * m);
raster[i] = argb;
}
}
}
bitmap.Invalidate();
return(bitmap);
}
/// <summary>
/// Converts the image to a png stream, which can be assigned to
/// a silverlight image control as image source and applies the specified
/// filter before converting the image.
/// </summary>
/// <param name="image">The image, which should be converted. Cannot be null
/// (Nothing in Visual Basic).</param>
/// <param name="filter">The filter, which should be applied before converting the
/// image or null, if no filter should be applied to. Cannot be null.</param>
/// <returns>The resulting stream.</returns>
/// <exception cref="ArgumentNullException">
/// <para><paramref name="image"/> is null (Nothing in Visual Basic).</para>
/// <para>- or -</para>
/// <para><paramref name="filter"/> is null (Nothing in Visual Basic).</para>
/// </exception>
public static Stream ToStream(this ExtendedImage image, IImageFilter filter)
{
Contract.Requires <ArgumentNullException>(image != null, "Image cannot be null.");
Contract.Requires <ArgumentException>(image.IsFilled, "Image has not been loaded.");
MemoryStream memoryStream = new MemoryStream();
try
{
ExtendedImage temp = image;
if (filter != null)
{
temp = image.Clone();
filter.Apply(temp, image, temp.Bounds);
}
PngEncoder encoder = new PngEncoder();
encoder.IsWritingUncompressed = true;
encoder.Encode(temp, memoryStream);
memoryStream.Seek(0, SeekOrigin.Begin);
}
catch
{
if (memoryStream != null)
{
memoryStream.Dispose();
memoryStream = null;
}
throw;
}
return(memoryStream);
}
/// <summary>
/// Applies the processor to the image.
/// <remarks>This method does not resize the target image.</remarks>
/// </summary>
/// <typeparam name="TColor">The pixel format.</typeparam>
/// <typeparam name="TPacked">The packed format. <example>uint, long, float.</example></typeparam>
/// <param name="source">The image this method extends.</param>
/// <param name="sourceRectangle">
/// The <see cref="Rectangle"/> structure that specifies the portion of the image object to draw.
/// </param>
/// <param name="processor">The processors to apply to the image.</param>
/// <returns>The <see cref="Image{TColor, TPacked}"/>.</returns>
internal static Image <TColor, TPacked> Process <TColor, TPacked>(this Image <TColor, TPacked> source, Rectangle sourceRectangle, IImageFilter <TColor, TPacked> processor)
where TColor : struct, IPackedPixel <TPacked>
where TPacked : struct
{
return(PerformAction(source, (sourceImage) => processor.Apply(sourceImage, sourceRectangle)));
}
public static Image Filter(this Image source, Rectangle rectangle, IImageFilter filter)
{
return(PerformAction(source, image => filter.Apply(image, rectangle)));
}
public static Image Filter(this Image source, Rectangle rectangle, IImageFilter filter)
{
return PerformAction(source, image => filter.Apply(image, rectangle));
}