Visualize depth buffer about sokol

[floooh]

Using a depth image object as texture won't work unfortunately (and it should warn about this in the validation layer, looks like I forgot a check).

The reason (at least for GL) is that a sokol image with depth-pixelformat is created as a glRenderBuffer object (see here:

sokol/sokol_gfx.h

Line 2738 in ce6414d

/* special case depth-stencil-buffer? */

)

IFIR the reason for this was various compatibility problems with GLES2 platforms (unextended GLES2 and WebGL doesn't have depth textures)/

If you need the depth texture visualization only for debugging purposes I'd recommend using a 3D API debugger like RenderDoc. If you need the depth content otherwise one solution would be to render the depth into a image texture from the pixel shader (but if you need to run on lowend platforms, also keep in mind that single-channel float32 textures might not be available everywhere, for the shadow map in this demo: http://floooh.github.io/oryol-samples/wasm/BulletPhysicsBasic.html I used the RGBA8 encoding from this blog post: http://aras-p.info/blog/2009/07/30/encoding-floats-to-rgba-the-final/

Cheers,
-Floh.

[dbacchet]

thanks for the explanation @floooh!

I will try copying the depth buffer into a texture; that should work for me (only targeting desktop systems).

closing this issue.