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Only Redraw if updated

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Hey,

I want to optimize some code, and wanted to only redraw the parts of the scene that need redrawing (2d graphics only, so i can break it into regions easily). Due to the SwapBuffers, this seems to break. What would be the best way to implement this?

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You can probably swap, then blit the front framebuffer to the back framebuffer and then draw on top of that.

Maybe something like this, haven't tested it though.

glSwapBuffers();
glReadBuffer(GL_FRONT);
glDrawBuffer(GL_BACK);
glBlitFramebuffer(...);

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This topic is 2543 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

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