In Direct3D 10 and later, the SV_Position semantic (when used in the context of a pixel shader) specifies screen space coordinates (offset by 0.5). The only shader I've made so far is the Pixel Shader that is used on the 2nd Pass, the shader that does the Per Pixel x Per Light calculations, sums them, and outputs final color. However, whenever I compile (I'm not actually using the shader in runtime, I'm just getting it all setup, the window is still just cleared to a color every frame, no When building shaders you'll need to use the vs_4_0_level_9_1 and ps_4_0_level_9_1 shader profiles. Feature level 9.1 does not support geometry shaders, compute shaders, or hardware tessellation shaders. Feature Level 9.1 only supports 16-bit index buffers (DXGI_FORMAT_R16_UINT).

Shader model ps_4_0_level_9_1 does not allow reading from position semantics

If a change to SPIR-V modifies semantics, it should use a different spelling. In SPIR-V, we can use OpName to describe these names, so we do not require the original Vulkan GLSL source to perform this reflection. We use this approach throughout the specification. An identifier is mapped to an internal meaning (semantic). The shader backend looks at these semantics and constructs a filter chain based on all shaders in the chain.

robertknoester92 April 20, 2015, 8:01pm #1.

"Vertices, Fragments, and the Graphics Pipeline" describes the data flow of modern graphics hardware and explains how Cg fits into this data flow. "Cg's Historical Development" provides some background on how Cg was developed.

2014-12-15 2013-06-22 When targeting the 9_1, 9_2 and 9_3 feature levels, the shader profiles you should use are: vs_4_0_level_9_1/ps_4_0_level_9_1 for levels 9_1 and 9_2, and; vs_4_0_level_9_3/ps_4_0_level_9_3 for the 9_3 level. This is hidden quite deeply in the MSDN documentation at This dependent texture read can't be mapped to ps_1_x, or the shader can't compile to a ps_1_x shader because this model can't match all the dependent texture reads this shader requires.

Shader model ps_4_0_level_9_1 does not allow reading from position semantics

ERR_TEXM_NO_SHARE 4524: texm can't be matched because computed texcoord is used in shader.
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In general, data passed between pipeline stages is completely generic and is not uniquely interpreted by the system; arbitrary semantics are allowed which have no special meaning.

Ventuz uses DirectX 11 and thus supports pixel shader model and vertex shader model 5.0. Older shader models will not compile without some modifications.
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Disabling optimization typically works around the issue, but you should also be able to fix it by eliminating unused (including via dead-code elimination) input declarations, and ensuring you avoid complicated code that reduces to no-op. 2014-12-15 2013-06-22 When targeting the 9_1, 9_2 and 9_3 feature levels, the shader profiles you should use are: vs_4_0_level_9_1/ps_4_0_level_9_1 for levels 9_1 and 9_2, and; vs_4_0_level_9_3/ps_4_0_level_9_3 for the 9_3 level. This is hidden quite deeply in the MSDN documentation at This dependent texture read can't be mapped to ps_1_x, or the shader can't compile to a ps_1_x shader because this model can't match all the dependent texture reads this shader requires. ERR_TEXM_NO_SHARE 4524: texm can't be matched because computed texcoord is used in shader. ERR_TEXM_NOT_COR_STAGE 4525 HLSL shader model 4.0.