floating point textures are pixel slurry on iOS

[Mwni]

When trying to sample from a floating point texture (RGBA32F/FLOAT), you get random pixels. See attached screenshot below

The texture has been cleared with color (0, 0, 0, 0), so unfortunately, as shown above, this is not just a matter of floats being interpreted as ints. Sadly I cannot confirm that the texture is actually filled with (0, 0, 0, 0), since gl.readPixels() does not write anything.

Is there some maybe flag missing that tells the backend "this is a float texture"?

[triniwiz]

Thanks for trying this those numbers should be passed to gl as floats {N} - > ios as for readPixels I followed a web impl a bit so I feel this may be causing an issue with what is returned . Feel free to share the code you used to test

[Mwni]

I did pass floats and it seems the issue is not with the texture itself, but rather its sampling in a fragment shader (using texture(tex, uv))
Are float textures expected to actually work on iOS? I will post my isolated code if they SHOULD work.

[triniwiz]

If possible try running this on a real device an lmk

[Mwni]

Okay, on device the texture is just blank instead of messy, regardless what color value i write to it using clear.Works with uint8 textures.

[Mwni]

I noticed the call to getExtention('WEBGL_color_buffer_float') returns some constants, notably "RGBA32F_EXT": 34836. Should this one maybe be used instead of gl.RGBA32F?

[triniwiz]

Can you try this again an lmk

[Mwni]

Yes, this is working perfectly now. Thank you!