LukasBanana/XShaderCompiler

No way to specify explicit binding for vertex shader inputs

Hyp-X opened this issue · 3 comments

Hyp-X commented

I found the -EB flag which translates the binding/location of samplers, constant buffers and fragment shader outputs.

However GLSL also allows layout(location = #) on vertex shader inputs.
There should be a way to map HLSL input semantics to GLSL binding locations.

For example:
POSITION 0
NORMAL 1
TEXCOORD0 2
etc.

This map could be passed in Xsc::ShaderInput for the library.
(Or appropriate command line flags for xsc.exe eg: -STEXCOORD0=2)

LukasBanana commented

Yes, it's an open issue, but it's not my current main focus,
since there are still problems with the I/O semantics translation.
E.g. when a struct is used as input and output.

If you have a good solution for this issue, let me know.
Is it an urgent demand for you?

Hyp-X commented

You don't have to do this urgently I just thought I create this issue as a reminder.

I'll check how hard is it to implement it myself.
I need this in a hobby project I try to use XShaderCompiler in.