GL_OES_texture_3D requires support for 3D textures at both API and GLSL
levels.
D3D11 back-end doesn't handle GLSL's added functions (texture3D*)
properly. See TextureFunctionHLSL::useTextureFunction()
(TextureFunctionHLSL.cpp:1475)
Bug: angleproject:4926
Change-Id: Icd669b070c68ec04f5de790d5a531912f5b42d98
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2336132
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
