132 lines
8.4 KiB
HLSL
132 lines
8.4 KiB
HLSL
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#ifndef UNITY_TEXTUREXR_INCLUDED
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#define UNITY_TEXTUREXR_INCLUDED
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// single-pass instancing is the default VR method for SRPs
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// multi-pass is working but not recommended due to lower performance
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// single-pass multi-view is not yet supported
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// single-pass doule-wide is deprecated
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// Must be in sync with C# with property useTexArray in TextureXR.cs
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#if (defined(SHADER_API_D3D11) && !defined(SHADER_API_XBOXONE) && !defined(SHADER_API_GAMECORE)) || defined(SHADER_API_PSSL) || defined(SHADER_API_VULKAN) || defined(SHADER_API_METAL)
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#define UNITY_TEXTURE2D_X_ARRAY_SUPPORTED
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#endif
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// Validate supported platforms
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#if defined(STEREO_INSTANCING_ON) && !defined(UNITY_TEXTURE2D_X_ARRAY_SUPPORTED)
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#error Single-pass instancing is not supported on this platform (see UNITY_TEXTURE2D_X_ARRAY_SUPPORTED).
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#endif
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#if defined(UNITY_SINGLE_PASS_STEREO)
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#error Single-pass (double-wide) is not compatible with TextureXR.hlsl.
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#endif
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// Control if TEXTURE2D_X macros will expand to texture arrays
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#if defined(UNITY_TEXTURE2D_X_ARRAY_SUPPORTED) && !defined(DISABLE_TEXTURE2D_X_ARRAY)
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#define USE_TEXTURE2D_X_AS_ARRAY
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#endif
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// Early defines for single-pass instancing
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#if defined(STEREO_INSTANCING_ON) && defined(UNITY_TEXTURE2D_X_ARRAY_SUPPORTED)
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#define UNITY_STEREO_INSTANCING_ENABLED
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#endif
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// Workaround for lack of multi compile in compute/ray shaders
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#if defined(UNITY_TEXTURE2D_X_ARRAY_SUPPORTED) && (defined(SHADER_STAGE_COMPUTE) || defined(SHADER_STAGE_RAY_TRACING))
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#define UNITY_STEREO_INSTANCING_ENABLED
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#endif
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// Define to override default rendering matrices
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#if defined(UNITY_STEREO_INSTANCING_ENABLED)
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#define USING_STEREO_MATRICES
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#endif
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// Helper macros to handle XR single-pass with Texture2DArray
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// With single-pass instancing, unity_StereoEyeIndex is used to select the eye in the current context.
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// Otherwise, the index is statically set to 0
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#if defined(USE_TEXTURE2D_X_AS_ARRAY)
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// Only single-pass stereo instancing used array indexing
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#if defined(UNITY_STEREO_INSTANCING_ENABLED)
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#define SLICE_ARRAY_INDEX unity_StereoEyeIndex
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#else
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#define SLICE_ARRAY_INDEX 0
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#endif
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#define COORD_TEXTURE2D_X(pixelCoord) uint3(pixelCoord, SLICE_ARRAY_INDEX)
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#define INDEX_TEXTURE2D_ARRAY_X(slot) ((slot) * _XRViewCount + SLICE_ARRAY_INDEX)
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#define TEXTURE2D_X TEXTURE2D_ARRAY
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#define TEXTURE2D_X_PARAM TEXTURE2D_ARRAY_PARAM
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#define TEXTURE2D_X_ARGS TEXTURE2D_ARRAY_ARGS
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#define TEXTURE2D_X_HALF TEXTURE2D_ARRAY_HALF
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#define TEXTURE2D_X_FLOAT TEXTURE2D_ARRAY_FLOAT
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#define TEXTURE2D_X_UINT(textureName) Texture2DArray<uint> textureName
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#define TEXTURE2D_X_UINT2(textureName) Texture2DArray<uint2> textureName
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#define TEXTURE2D_X_UINT4(textureName) Texture2DArray<uint4> textureName
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//Using explicit sample count of 1 to force DXC to actually reflect the texture as MS. The actual count appears to be irrelevant and any 2D MS texture array should bind to it
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#define TEXTURE2D_X_MSAA(type, textureName) Texture2DMSArray<type, 1> textureName
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#define RW_TEXTURE2D_X(type, textureName) RW_TEXTURE2D_ARRAY(type, textureName)
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#define TYPED_TEXTURE2D_X(type, textureName) TYPED_TEXTURE2D_ARRAY(type, textureName)
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#define LOAD_TEXTURE2D_X(textureName, unCoord2) LOAD_TEXTURE2D_ARRAY(textureName, unCoord2, SLICE_ARRAY_INDEX)
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#define LOAD_TEXTURE2D_X_MSAA(textureName, unCoord2, sampleIndex) LOAD_TEXTURE2D_ARRAY_MSAA(textureName, unCoord2, SLICE_ARRAY_INDEX, sampleIndex)
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#define LOAD_TEXTURE2D_X_LOD(textureName, unCoord2, lod) LOAD_TEXTURE2D_ARRAY_LOD(textureName, unCoord2, SLICE_ARRAY_INDEX, lod)
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#define SAMPLE_TEXTURE2D_X(textureName, samplerName, coord2) SAMPLE_TEXTURE2D_ARRAY(textureName, samplerName, coord2, SLICE_ARRAY_INDEX)
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#define SAMPLE_TEXTURE2D_X_LOD(textureName, samplerName, coord2, lod) SAMPLE_TEXTURE2D_ARRAY_LOD(textureName, samplerName, coord2, SLICE_ARRAY_INDEX, lod)
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#define GATHER_TEXTURE2D_X(textureName, samplerName, coord2) GATHER_TEXTURE2D_ARRAY(textureName, samplerName, coord2, SLICE_ARRAY_INDEX)
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#define GATHER_RED_TEXTURE2D_X(textureName, samplerName, coord2) GATHER_RED_TEXTURE2D(textureName, samplerName, float3(coord2, SLICE_ARRAY_INDEX))
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#define GATHER_GREEN_TEXTURE2D_X(textureName, samplerName, coord2) GATHER_GREEN_TEXTURE2D(textureName, samplerName, float3(coord2, SLICE_ARRAY_INDEX))
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#define GATHER_BLUE_TEXTURE2D_X(textureName, samplerName, coord2) GATHER_BLUE_TEXTURE2D(textureName, samplerName, float3(coord2, SLICE_ARRAY_INDEX))
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#define GATHER_ALPHA_TEXTURE2D_X(textureName, samplerName, coord2) GATHER_ALPHA_TEXTURE2D(textureName, samplerName, float3(coord2, SLICE_ARRAY_INDEX))
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#else
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#define SLICE_ARRAY_INDEX 0
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#define COORD_TEXTURE2D_X(pixelCoord) pixelCoord
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#define INDEX_TEXTURE2D_ARRAY_X(slot) (slot)
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#define TEXTURE2D_X TEXTURE2D
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#define TEXTURE2D_X_PARAM TEXTURE2D_PARAM
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#define TEXTURE2D_X_ARGS TEXTURE2D_ARGS
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#define TEXTURE2D_X_HALF TEXTURE2D_HALF
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#define TEXTURE2D_X_FLOAT TEXTURE2D_FLOAT
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#define TEXTURE2D_X_UINT(textureName) Texture2D<uint> textureName
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#define TEXTURE2D_X_UINT2(textureName) Texture2D<uint2> textureName
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#define TEXTURE2D_X_UINT4(textureName) Texture2D<uint4> textureName
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//Using explicit sample count of 1 to force DXC to actually reflect the texture as MS. The actual count appears to be irrelevant and any 2D MS texture should bind to it
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#define TEXTURE2D_X_MSAA(type, textureName) Texture2DMS<type, 1> textureName
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#define RW_TEXTURE2D_X RW_TEXTURE2D
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#define TYPED_TEXTURE2D_X TYPED_TEXTURE2D
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#define LOAD_TEXTURE2D_X LOAD_TEXTURE2D
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#define LOAD_TEXTURE2D_X_MSAA LOAD_TEXTURE2D_MSAA
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#define LOAD_TEXTURE2D_X_LOD LOAD_TEXTURE2D_LOD
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#define SAMPLE_TEXTURE2D_X SAMPLE_TEXTURE2D
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#define SAMPLE_TEXTURE2D_X_LOD SAMPLE_TEXTURE2D_LOD
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#define GATHER_TEXTURE2D_X GATHER_TEXTURE2D
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#define GATHER_RED_TEXTURE2D_X GATHER_RED_TEXTURE2D
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#define GATHER_GREEN_TEXTURE2D_X GATHER_GREEN_TEXTURE2D
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#define GATHER_BLUE_TEXTURE2D_X GATHER_BLUE_TEXTURE2D
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#define GATHER_ALPHA_TEXTURE2D_X GATHER_ALPHA_TEXTURE2D
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#endif
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// see Unity\Shaders\Includes\UnityShaderVariables.cginc for impl used by the C++ renderer
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#if defined(USING_STEREO_MATRICES) && defined(UNITY_STEREO_INSTANCING_ENABLED)
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static uint unity_StereoEyeIndex;
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#else
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#define unity_StereoEyeIndex 0
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#endif
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// Helper macro to assign view index during compute/ray pass (usually from SV_DispatchThreadID or DispatchRaysIndex())
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#if defined(SHADER_STAGE_COMPUTE) || defined(SHADER_STAGE_RAY_TRACING)
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#if defined(UNITY_STEREO_INSTANCING_ENABLED)
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#define UNITY_XR_ASSIGN_VIEW_INDEX(viewIndex) unity_StereoEyeIndex = viewIndex;
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#else
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#define UNITY_XR_ASSIGN_VIEW_INDEX(viewIndex)
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#endif
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// Backward compatibility
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#define UNITY_STEREO_ASSIGN_COMPUTE_EYE_INDEX UNITY_XR_ASSIGN_VIEW_INDEX
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#endif
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#endif // UNITY_TEXTUREXR_INCLUDED
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