Redundant GL_EXT_samplerless_texture_functions?

[Ollhax]

I'm trying to get dimensions out of a 3d texture:

layout(binding=1) Sampler3D sampler;

...

float4 fragmentMain(...)
{
	int sizeX;
	int sizeY;
	int sizeZ;
	sampler.GetDimensions(sizeX, sizeY, sizeZ);
...
}

This shader doesn't work for me since it generates #extension GL_EXT_samplerless_texture_functions : require at the top, but that extension does not exist in regular OpenGL. I understand that Slang is not prioritizing/supporting GLSL shaders for OpenGL, but unless I'm missing something it's not really required in this situation anyway.

[csyonghe]

\source\slang\slang-core-module-textures.cpp line 494 needs to be made conditional so we don't emit that extension requirement if we are emitting code for the combined sampler.

However, isCombined is currently a generic parameter instead of a meta parameter. We can avoid making isCombined to be another meta parameter by calling __requireGLSLExtension() inside an if (isCombined != 0) in the body of the GetDimensions() function for glsl.