Hello, I'm running into an issue where hlsl shaders compiled to DXIL with shadercross will cause pipeline creation to fail, but compiled directly with dxc (no SPIR-V intermediate) will work fine. It only happens when I have unused input parameters in my fragment shader. Based on that, and taking a cursory glance at the binary text of the compiled shaders, my guess is that those unused parameters are getting stripped. I ran across issue #127 which sounds like the same problem, but this is also happening with the latest nightly build.
Here's the error:
D3D12 ERROR: ID3D12Device::CreateGraphicsPipelineState: Vertex Shader - Pixel Shader linkage error: Signatures between stages are incompatible. Semantic 'TEXCOORD' is defined for mismatched hardware registers between the output stage and input stage. [ STATE_CREATION ERROR #660: CREATEGRAPHICSPIPELINESTATE_SHADER_LINKAGE_REGISTERINDEX]
ERROR: Could not create graphics pipeline state! Error Code: The parameter is incorrect. (0x80070057)
Error: pipeline is null
I've put a complete code example in this gist, I tried to make it as minimal as possible: https://gist.github.com/paulpage/5dc77cd868eb789eeed63ac5c05e718c
To summarize what's in the gist, here's the fragment shader:
struct Input {
float4 rect : TEXCOORD0;
float4 color : TEXCOORD1;
float4 position : SV_Position;
};
cbuffer UniformBlock : register(b0, space3) {
float2 screen_size : packoffset(c0);
};
float4 main(Input input) : SV_Target0 {
// This works with shadercross and dxc:
// float4 color = input.color;
// color.r += (input.rect.x * input.rect.y * input.rect.z * input.rect.w * input.position.x * input.position.y * input.position.z * input.position.w * 0.000001);
// return color;
// This does not work with shadercross:
return input.color;
}And the compilation commands:
shadercross.exe shader.frag.hlsl -o shader.frag.dxil
dxc -T ps_6_0 shader.frag.hlsl -Fo shader.frag.dxil
Hello, I'm running into an issue where hlsl shaders compiled to DXIL with shadercross will cause pipeline creation to fail, but compiled directly with dxc (no SPIR-V intermediate) will work fine. It only happens when I have unused input parameters in my fragment shader. Based on that, and taking a cursory glance at the binary text of the compiled shaders, my guess is that those unused parameters are getting stripped. I ran across issue #127 which sounds like the same problem, but this is also happening with the latest nightly build.
Here's the error:
I've put a complete code example in this gist, I tried to make it as minimal as possible: https://gist.github.com/paulpage/5dc77cd868eb789eeed63ac5c05e718c
To summarize what's in the gist, here's the fragment shader:
And the compilation commands: