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Back to Graphics and GPU Programming

DirectDraw Clippers

ZomeonE · 1999-12-15T15:05:00

I'm have a 2d scrolling function, which uses a clipper on the backbuffer and normal ->Blt(...) to draw the tiles on the screen. But it's SLOW, really SLOW. So I'm wondering: are clippers slow? or is it just my code that is?

Graphics and GPU Programming Programming

Started by ZomeonE December 15, 1999 03:05 PM

19 comments, last by ZomeonE 24 years, 6 months ago

Anonymous

December 15, 1999 03:05 PM

No, your right about that, if the ACTUAL image is 40x40, and you define the source rect to be 20x20, it will clip the rest off. However, if the destination rect is DIFFERENT than 20x20, it will automatically stretch it to fit, which MAY slow down your program.

Vore