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Fix for bug 1444, the WuQuantizer doesn't work if the colors are already less than 256 so we just create a 8bpp image from the source.

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git-svn-id: http://svn.code.sf.net/p/greenshot/code/trunk@2451 7dccd23d-a4a3-4e1f-8c07-b4c1b4018ab4
This commit is contained in:
RKrom 2013-02-01 16:18:48 +00:00
parent e30939093a
commit 2730ac5540
4 changed files with 57 additions and 14 deletions
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21
GreenshotPlugin/Core/ImageHelper.cs
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@ -1199,20 +1199,21 @@ namespace GreenshotPlugin.Core {
/// <param name="backgroundColor">The color to fill with, or Color.Empty to take the default depending on the pixel format</param>
/// <param name="horizontalResolution"></param>
/// <param name="verticalResolution"></param>
/// <returns></returns>
/// <returns>Bitmap</returns>
public static Bitmap CreateEmpty(int width, int height, PixelFormat format, Color backgroundColor, float horizontalResolution, float verticalResolution) {
// Create a new "clean" image
Bitmap newImage = new Bitmap(width, height, format);
newImage.SetResolution(horizontalResolution, verticalResolution);
using (Graphics graphics = Graphics.FromImage(newImage)) {
// Make sure the background color is what we want (transparent or white, depending on the pixel format)
if (!Color.Empty.Equals(backgroundColor)) {
graphics.Clear(backgroundColor);
} else if (Image.IsAlphaPixelFormat(format)) {
graphics.Clear(Color.Transparent);
} else {
graphics.Clear(Color.White);
if (format != PixelFormat.Format8bppIndexed) {
using (Graphics graphics = Graphics.FromImage(newImage)) {
// Make sure the background color is what we want (transparent or white, depending on the pixel format)
if (!Color.Empty.Equals(backgroundColor)) {
graphics.Clear(backgroundColor);
} else if (Image.IsAlphaPixelFormat(format)) {
graphics.Clear(Color.Transparent);
} else {
graphics.Clear(Color.White);
}
}
}
return newImage;