Comments (3)
Not sure if this is still an issue with gles2, will check.
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Still seems to be an issue. When trying to modify the shaders one of the failure modes was like this. i.e. black screen but the python carried on running fine (terminal shows the print output and the FPS same as before) the other failure mode was the white screen which makes the python run very slowly (but actually still prints to the terminal window).
I've tried putting odd opengles function calls into a test program without passing pointers to real data to the shader and it still produces a black screen.
I suspect the only way to fix this would be to either have a special shader that didn't need any uniform variables (or attributes) and call it each loop, or, just create a simple Sprite object and draw it behind the camera with the mat_flat shader. It's probably something that isn't going to crop up often, maybe we should put something in the manual about how to cope with it.
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explanation in Display.set_background
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