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由 Anatoly Trosinenko 提交于
The documentation on SDL_RenderPresent function states that "the backbuffer should be considered invalidated after each present", so copy the entire texture on each redraw. On the other hand, SDL_UpdateTexture function is described as "fairly slow function", so restrict it to just the changed pixels. Also added SDL_RenderClear call, as suggested in the documentation page on SDL_RenderPresent. Signed-off-by: NAnatoly Trosinenko <anatoly.trosinenko@gmail.com> Message-id: 20180205133228.25082-1-anatoly.trosinenko@gmail.com Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
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