Copy frame buffer into Texture

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Hi guys, I would like to copy the content of the frame buffer into a texture in a FAST way, every frame.

No Texture2D.ReadPixels, it's super slow, probably because it locks the frame buffer and double buffer writes are delayed, making a mess.

I was thinking to do a Graphics.Blit in the PostRender of the camera, but then I need to call a re-size on the texture to save space when storing it. I would prefer to do both copying and re-sizing at the same time. I guess a shader is the only option. Too bad I don't even know where to start. Maybe some of you guys can direct me to a close example.

Cheers!

Answer 1

Answer by scorched · May 19, 2015 at 07:55 PM

Have you tried just changing Target Texture property of a Camera object to Render Texture as in link below?

http://docs.unity3d.com/Manual/class-RenderTexture.html

Though, that camera will not draw to screen, you will need extra camera for screen

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Copy frame buffer into Texture

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