[rtextures/rlgl] Load mipmaps for cubemaps #4429
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Not-Nik
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@Not-Nik Thanks for the improvement! |
raysan5
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@Not-Nik I'm afraid this PR breaks |
raysan5
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I just put a quick fix to avoid the crash in the |
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The fix should comment out both mipmap generations, other wise OpenGL will try to read mipmaps that aren't properly generated |
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I found the bug, I'll create a fixup PR in 20 minutes |
psxdev
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* [rlgl] Load cubemap mipmaps * [rtextures] Only generate mipmaps that don't already exist * [rtextures] ImageDraw(): Implement drawing to mipmaps * [rtextures] Load cubemap mipmaps
psxdev
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psxdev
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Load all mipmaps for cubemaps to the GPU and enable the proper filters for them. This is especially important for image based lighting (IBL), where for different roughness levels, different pre-filtered environment maps are stored in mipmaps. Calculating these filters is rather expensive, so it is often done offline and the pre-filtered cubemaps are shipped with the game.
The implementation did require some reworking; notably
rlLoadTextureCubemapgains a newmipmapCountparameter, andImageMipmapsno longer regenerates already existing mipmaps.I structured the PR to be able to just be rebased onto master if you want all the different changes to reflect in the tree.