Rank: Advanced Member
Groups: Guest
Joined: 10/12/2015(UTC)
Posts: 44
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My "back.gif" is always Format8bppIndexed, and if there is no transparency then the following works and looks great: Code:
using (var back = new Aurigma.GraphicsMill.Bitmap("base.gif"))
using (var overlay = new Aurigma.GraphicsMill.Bitmap("overlay.gif")) {
back.Draw(overlay, 0, 0, Aurigma.GraphicsMill.Transforms.CombineMode.Copy);
}
But if the "overlay.gif" has transparent pixels the CombineMode.Copy doesn't work, so I'm using CombineModel.Alpha. I'm also converting to Format32bppArgb so I don't get the "UnsupportedPixelFormatException" Code:
using (var back = new Aurigma.GraphicsMill.Bitmap("base.gif"))
using (var overlay = new Aurigma.GraphicsMill.Bitmap("overlay.gif")) {
back.ColorManagement.Convert(Aurigma.GraphicsMill.PixelFormat.Format32bppArgb);
back.Draw(overlay, 0, 0, Aurigma.GraphicsMill.Transforms.CombineMode.Alpha);
}
The desired result is ALMOST there, but it's very pixelated. How can I make merge these two images and get a better result?  
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Rank: Advanced Member
Groups: Guest
Joined: 10/20/2015(UTC)
Posts: 52
Was thanked: 14 time(s) in 13 post(s)
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Hi Brian, Could you please send me your GIF-files (base.gif and overlay.gif)? Also, please send the full code snippet (I need to know what you are going to do next after drawing). Thanks! Best regards, Kate
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Rank: Advanced Member
Groups: Guest
Joined: 10/12/2015(UTC)
Posts: 44
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I'm assuming your reply meant "It works for me, how are you messing this up". And you are correct, the code I originally posted is working fine, the problem is how I write it to disk. The following is for anyone else that runs across this similar problem: I had a legacy method that turns an image into a byte array: Code:
private static byte[] getGytes(Image img) {
using (var stream = new MemoryStream()) {
img.Save(stream, System.Drawing.Imaging.ImageFormat.Gif);
return stream.ToArray();
}
}
And I would call it like this: Code:
var imageBytes = getGytes(back.ToGdiPlusBitmap());
I'm guessing the conversion to System.Drawing.Bitmap was the issue, because the following was my solution: Code:
private static byte[] getGytes(Aurigma.GraphicsMill.Bitmap bmp) {
using (var stream = new MemoryStream()) {
bmp.Save(stream, new Aurigma.GraphicsMill.Codecs.GifSettings() { });
return stream.ToArray();
}
}
Now I just call the method without the "ToGdiPlusBitmap()" Code:
var imageBytes = getGytes(back);
Thanks again for the great forum support.
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Rank: Advanced Member
Groups: Guest
Joined: 10/20/2015(UTC)
Posts: 52
Was thanked: 14 time(s) in 13 post(s)
|
Hi Brian, As far as I understood the problem was resolved. Please let me know if you still have any problems with it. Best regards, Kate
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