Is there any simple way to load floating point image (HDR or EXR) in Metal?
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I have some code for this, will see what I did when I’m back at my desk.
This is how I did it in GLTFKit (there’s a little vImage magic in the middle to massage all HDR images into RGBA16Float):https://github.com/warrenm/GLTFKit/blob/master/Framework/GLTFMTL/Source/GLTFMTLTextureLoader.m#L167 …
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Thank you! I will check it. Yesterday I ended up using OpenEXR, which is not quite what I was looking for (I supposed to use no external libs).
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Warren’s setup is a lot cleaner than mine which loads the image as NSImage, then gets CGImage and creates the texture from that. (Better in my case as I need to show the texture in the UI too, so I need the NSImage.)
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All my experiments with loading using NSImage ended up with something like “Unable to decode” (not remember exactly). I will check your code later today, maybe I was doing something wrong
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Yeah, I seem to do some “draw cgimage into context” intermediate step to get around that. Will post the code up.
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Will it work for floating point? I seem to be unable to create floating point drawing context
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Yeah, I use it to import HDRi light probes for my path tracer :)
End of conversation
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