Can anyone tell me the best layer and surfaces configuration to reduce cpu usage.
- Minimise the number of times you copy the image - Use hardware acceleration wherever possible - Avoid having the CPU work on things in video memory Based on your description, I don't think you need a separate surface. For best performance, simply lock the video layer surface itself, copy your data straight into its back buffer, unlock it and flip it. That will require one system->video memory copy (which is unavoidable since your image is in system memory to start with) and nothing more. Currently, you have a system->system copy followed by a system->video copy (neither of which is accelerated). Mark
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