Leonardo M. Ramé wrote:
I'm thinking of copying the buffer into an two dimensional matrix, apply transformations, then extract the overlapping part and lastly paint. Before doing so, I'm asking here, because I'm afraid it could take too long to apply "n" transformations before displaying the final result.
I'm not sure how far this helps, but my understanding is that if you implement each transformation as a matrix, you can multiply the transformations to get a final matrix which you only then apply to each point. That would reduce the problem to the (non-linear) operation of deciding whether each transformed pixel was in range of the canvas.
I did have a good reference for this sort of thing which I can't currently find, but http://msdn.microsoft.com/en-us/library/windows/desktop/ff684171(v=vs.85).aspx looks like a reasonable starting point.
-- Mark Morgan Lloyd markMLl .AT. telemetry.co .DOT. uk [Opinions above are the author's, not those of his employers or colleagues] -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
