public static Gdk.Rectangle TransformAndCopy(Gdk.Pixbuf src, Gdk.Pixbuf dest, PixbufOrientation orientation, Gdk.Rectangle args)
{
Gdk.Rectangle area = TransformOrientation(src, args, orientation);
int step = 256;
Gdk.Rectangle rect = new Gdk.Rectangle(args.X, args.Y,
Math.Min(step, args.Width),
Math.Min(step, args.Height));
Gdk.Rectangle trect = TransformOrientation(src, rect, orientation);
Gdk.Pixbuf tmp = new Gdk.Pixbuf(src.Colorspace, src.HasAlpha,
src.BitsPerSample,
trect.Width, trect.Height);
Gdk.Rectangle subarea;
BlockProcessor proc = new BlockProcessor(args, 256);
while (proc.Step(out subarea))
{
Gdk.Rectangle trans = TransformOrientation(src, subarea, orientation);
Gdk.Pixbuf ssub = new Gdk.Pixbuf(src, subarea.X, subarea.Y,
subarea.Width, subarea.Height);
Gdk.Pixbuf tsub = new Gdk.Pixbuf(tmp, 0, 0, trans.Width, trans.Height);
CopyWithOrientation(ssub, tsub, orientation);
tsub.CopyArea(0, 0, trans.Width, trans.Height, dest, trans.X, trans.Y);
ssub.Dispose();
tsub.Dispose();
}
tmp.Dispose();
return(area);
}
private void OnExpose(Context ctx, Region region)
{
SetClip(ctx, region);
if (Transition != null)
{
bool done = false;
foreach (Gdk.Rectangle area in GetRectangles(region))
{
BlockProcessor proc = new BlockProcessor(area, block_size);
Gdk.Rectangle subarea;
while (proc.Step(out subarea))
{
ctx.Save();
SetClip(ctx, subarea);
done = !Transition.OnExpose(ctx, Allocation);
ctx.Restore();
}
}
if (done)
{
System.Console.WriteLine("frames = {0}", Transition.Frames);
Transition = null;
}
}
else if (effect != null)
{
foreach (Gdk.Rectangle area in GetRectangles(region))
{
BlockProcessor proc = new BlockProcessor(area, block_size);
Gdk.Rectangle subarea;
while (proc.Step(out subarea))
{
ctx.Save();
SetClip(ctx, subarea);
effect.OnExpose(ctx, Allocation);
ctx.Restore();
}
}
}
else
{
ctx.Operator = Operator.Source;
SurfacePattern p = new SurfacePattern(current.Surface);
p.Filter = Filter.Fast;
SetClip(ctx, region);
ctx.Matrix = current.Fill(Allocation);
ctx.Source = p;
ctx.Paint();
p.Destroy();
}
}