I want to draw using Fl_Offscreen, doing something like:
Fl_Offscreen oscr = fl_create_offscreen(120, 120);
fl_rectf(0, 0, 120, 120);
fl_rectf(-10, -10, 100, 100);
// print offscreen color at (10, 10)
1) At the end of this code I want check the color of a given point. How can I do that?
2) I write to outside the pixmap (fl_rectf(-10, -10, 100, 100)), is that ok ?
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