Forums - framebuffer fetch Causes the gpu clock to double

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framebuffer fetch Causes the gpu clock to double
244584523
Join Date: 29 Apr 21
Posts: 1
Posted: Fri, 2022-03-25 00:56

II'm trying to implement deferred rendering using framebuffer fetch . But in my test environment, the framerate dropped badly. Using snapdragon profiler found that when accessing framebuffer, gpu clocks increased significantly and bandwidth decreased significantly. So I would like to ask how can I increase the frame rate when using framebuffer fetch? At the same time, I would like to ask if there is any way of writing that can explicitly indicate that gbuffer is read-only? Usually only gbuffer0 needs to be read and written, while other gbuffers are read-only.

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DuBo
Join Date: 9 Dec 13
Posts: 41
Posted: Thu, 2022-04-21 19:59

Do you use GL_EXT_shader_framebuffer_fetch extension? Can you share your sample code to use framebuffer fetch?

Thanks
Bob Du

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