I have a very simple code that draws an image on a bitmap, the image must be
drawn in the lower right corner. I use TranslateTransform to move the image.
This works fine when run under Windows, however, TranslateTransform has no
effect when run in Mono under Linux.
byte[] imageBytes = File.ReadAllBytes(@"/home/alexey/Downloads/test.png");
using (Bitmap bmp = new Bitmap(500, 500))
{
using (Graphics gr = Graphics.FromImage(bmp))
{
ImageAttributes attr = null;
using (Image image = Image.FromStream(new MemoryStream(imageBytes)))
{
GraphicsUnit srcGU = GraphicsUnit.Pixel;
RectangleF srcRect = image.GetBounds(ref srcGU);
RectangleF bounds = new RectangleF(0, 0, 100, 100);
// Destination points specify the bounding parallelogram.
PointF[] dstPoints = new PointF[]
{ bounds.Location,
new PointF(bounds.X + bounds.Width, bounds.Y),
new PointF(bounds.X, bounds.Y + bounds.Height) };
// Image must be in the in the lower right corner and it is if
run the code under Windows.
// But is run code under linux, the image is in the upper left
corner.
gr.TranslateTransform(400,400);
gr.DrawImage(image, dstPoints, srcRect, srcGU, attr);
}
}
bmp.Save(@"/home/alexey/Downloads/out.png", ImageFormat.Png);
}
Of course, the code is a simplified version of the real code that must work
in both windows and Linux environments. I narrowed down the code and found
that the problems under linux occur because Graphics.Transform has no effect
in Mono under linux. Any ideas?
I posted the same on stackoverflow:
http://stackoverflow.com/questions/10448947/system-drawing-graphics-transform-has-no-effect-in-mono-under-ubuntu
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