fd738e3387
In Metal, the `[[position]]` input to a fragment shader remains at fragment center, even at sample rate, like OpenGL and Direct3D. In Vulkan, however, when the fragment shader runs at sample rate, the `FragCoord` builtin moves to the sample position in the framebuffer, instead of the fragment center. To account for this difference, adjust the `FragCoord`, if present, by the sample position. The -0.5 offset is because the fragment center is at (0.5, 0.5). Also, add an option to force sample-rate shading in a fragment shader. Since Metal has no explicit control for this, this is done by adding a dummy `[[sample_id]]` which is otherwise unused, if none is already present. This is intended to be used from e.g. MoltenVK when a pipeline's `minSampleShading` value is nonzero. Instead of checking if any `Input` variables have `Sample` interpolation, I've elected to check that the `SampleRateShading` capability is present. Since `SampleId`, `SamplePosition`, and the `Sample` interpolation decoration require this cap, this should be equivalent for any valid SPIR-V module. If this isn't acceptable, let me know.
215 lines
8.4 KiB
GLSL
215 lines
8.4 KiB
GLSL
#include <metal_stdlib>
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#include <simd/simd.h>
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using namespace metal;
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struct type_View
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{
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float4x4 View_TranslatedWorldToClip;
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float4x4 View_WorldToClip;
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float4x4 View_TranslatedWorldToView;
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float4x4 View_ViewToTranslatedWorld;
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float4x4 View_TranslatedWorldToCameraView;
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float4x4 View_CameraViewToTranslatedWorld;
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float4x4 View_ViewToClip;
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float4x4 View_ViewToClipNoAA;
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float4x4 View_ClipToView;
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float4x4 View_ClipToTranslatedWorld;
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float4x4 View_SVPositionToTranslatedWorld;
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float4x4 View_ScreenToWorld;
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float4x4 View_ScreenToTranslatedWorld;
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packed_float3 View_ViewForward;
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float PrePadding_View_844;
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packed_float3 View_ViewUp;
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float PrePadding_View_860;
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packed_float3 View_ViewRight;
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float PrePadding_View_876;
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packed_float3 View_HMDViewNoRollUp;
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float PrePadding_View_892;
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packed_float3 View_HMDViewNoRollRight;
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float PrePadding_View_908;
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float4 View_InvDeviceZToWorldZTransform;
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float4 View_ScreenPositionScaleBias;
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packed_float3 View_WorldCameraOrigin;
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float PrePadding_View_956;
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packed_float3 View_TranslatedWorldCameraOrigin;
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float PrePadding_View_972;
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packed_float3 View_WorldViewOrigin;
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float PrePadding_View_988;
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packed_float3 View_PreViewTranslation;
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float PrePadding_View_1004;
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float4x4 View_PrevProjection;
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float4x4 View_PrevViewProj;
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float4x4 View_PrevViewRotationProj;
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float4x4 View_PrevViewToClip;
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float4x4 View_PrevClipToView;
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float4x4 View_PrevTranslatedWorldToClip;
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float4x4 View_PrevTranslatedWorldToView;
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float4x4 View_PrevViewToTranslatedWorld;
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float4x4 View_PrevTranslatedWorldToCameraView;
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float4x4 View_PrevCameraViewToTranslatedWorld;
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packed_float3 View_PrevWorldCameraOrigin;
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float PrePadding_View_1660;
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packed_float3 View_PrevWorldViewOrigin;
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float PrePadding_View_1676;
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packed_float3 View_PrevPreViewTranslation;
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float PrePadding_View_1692;
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float4x4 View_PrevInvViewProj;
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float4x4 View_PrevScreenToTranslatedWorld;
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float4x4 View_ClipToPrevClip;
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float4 View_TemporalAAJitter;
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float4 View_GlobalClippingPlane;
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float2 View_FieldOfViewWideAngles;
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float2 View_PrevFieldOfViewWideAngles;
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float4 View_ViewRectMin;
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float4 View_ViewSizeAndInvSize;
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float4 View_BufferSizeAndInvSize;
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float4 View_BufferBilinearUVMinMax;
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int View_NumSceneColorMSAASamples;
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float View_PreExposure;
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float View_OneOverPreExposure;
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float PrePadding_View_2012;
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float4 View_DiffuseOverrideParameter;
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float4 View_SpecularOverrideParameter;
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float4 View_NormalOverrideParameter;
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float2 View_RoughnessOverrideParameter;
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float View_PrevFrameGameTime;
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float View_PrevFrameRealTime;
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float View_OutOfBoundsMask;
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float PrePadding_View_2084;
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float PrePadding_View_2088;
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float PrePadding_View_2092;
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packed_float3 View_WorldCameraMovementSinceLastFrame;
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float View_CullingSign;
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float View_NearPlane;
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float View_AdaptiveTessellationFactor;
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float View_GameTime;
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float View_RealTime;
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float View_DeltaTime;
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float View_MaterialTextureMipBias;
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float View_MaterialTextureDerivativeMultiply;
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uint View_Random;
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uint View_FrameNumber;
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uint View_StateFrameIndexMod8;
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uint View_StateFrameIndex;
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float View_CameraCut;
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float View_UnlitViewmodeMask;
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float PrePadding_View_2164;
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float PrePadding_View_2168;
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float PrePadding_View_2172;
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float4 View_DirectionalLightColor;
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packed_float3 View_DirectionalLightDirection;
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float PrePadding_View_2204;
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float4 View_TranslucencyLightingVolumeMin[2];
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float4 View_TranslucencyLightingVolumeInvSize[2];
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float4 View_TemporalAAParams;
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float4 View_CircleDOFParams;
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float View_DepthOfFieldSensorWidth;
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float View_DepthOfFieldFocalDistance;
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float View_DepthOfFieldScale;
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float View_DepthOfFieldFocalLength;
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float View_DepthOfFieldFocalRegion;
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float View_DepthOfFieldNearTransitionRegion;
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float View_DepthOfFieldFarTransitionRegion;
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float View_MotionBlurNormalizedToPixel;
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float View_bSubsurfacePostprocessEnabled;
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float View_GeneralPurposeTweak;
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float View_DemosaicVposOffset;
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float PrePadding_View_2348;
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packed_float3 View_IndirectLightingColorScale;
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float View_HDR32bppEncodingMode;
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packed_float3 View_AtmosphericFogSunDirection;
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float View_AtmosphericFogSunPower;
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float View_AtmosphericFogPower;
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float View_AtmosphericFogDensityScale;
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float View_AtmosphericFogDensityOffset;
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float View_AtmosphericFogGroundOffset;
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float View_AtmosphericFogDistanceScale;
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float View_AtmosphericFogAltitudeScale;
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float View_AtmosphericFogHeightScaleRayleigh;
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float View_AtmosphericFogStartDistance;
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float View_AtmosphericFogDistanceOffset;
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float View_AtmosphericFogSunDiscScale;
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uint View_AtmosphericFogRenderMask;
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uint View_AtmosphericFogInscatterAltitudeSampleNum;
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float4 View_AtmosphericFogSunColor;
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packed_float3 View_NormalCurvatureToRoughnessScaleBias;
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float View_RenderingReflectionCaptureMask;
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float4 View_AmbientCubemapTint;
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float View_AmbientCubemapIntensity;
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float View_SkyLightParameters;
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float PrePadding_View_2488;
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float PrePadding_View_2492;
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float4 View_SkyLightColor;
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float4 View_SkyIrradianceEnvironmentMap[7];
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float View_MobilePreviewMode;
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float View_HMDEyePaddingOffset;
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float View_ReflectionCubemapMaxMip;
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float View_ShowDecalsMask;
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uint View_DistanceFieldAOSpecularOcclusionMode;
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float View_IndirectCapsuleSelfShadowingIntensity;
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float PrePadding_View_2648;
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float PrePadding_View_2652;
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packed_float3 View_ReflectionEnvironmentRoughnessMixingScaleBiasAndLargestWeight;
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int View_StereoPassIndex;
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float4 View_GlobalVolumeCenterAndExtent[4];
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float4 View_GlobalVolumeWorldToUVAddAndMul[4];
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float View_GlobalVolumeDimension;
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float View_GlobalVolumeTexelSize;
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float View_MaxGlobalDistance;
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float View_bCheckerboardSubsurfaceProfileRendering;
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packed_float3 View_VolumetricFogInvGridSize;
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float PrePadding_View_2828;
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packed_float3 View_VolumetricFogGridZParams;
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float PrePadding_View_2844;
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float2 View_VolumetricFogSVPosToVolumeUV;
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float View_VolumetricFogMaxDistance;
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float PrePadding_View_2860;
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packed_float3 View_VolumetricLightmapWorldToUVScale;
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float PrePadding_View_2876;
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packed_float3 View_VolumetricLightmapWorldToUVAdd;
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float PrePadding_View_2892;
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packed_float3 View_VolumetricLightmapIndirectionTextureSize;
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float View_VolumetricLightmapBrickSize;
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packed_float3 View_VolumetricLightmapBrickTexelSize;
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float View_StereoIPD;
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float View_IndirectLightingCacheShowFlag;
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float View_EyeToPixelSpreadAngle;
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};
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struct type_Globals
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{
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float3 SoftTransitionScale;
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float4 ShadowBufferSize;
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float ShadowFadeFraction;
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float ShadowSharpen;
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float4 LightPositionAndInvRadius;
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float4x4 ScreenToShadowMatrix;
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float2 ProjectionDepthBiasParameters;
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float4 ModulatedShadowColor;
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float4 ShadowTileOffsetAndSize;
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};
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constant float4 _58 = {};
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struct main0_out
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{
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float4 out_var_SV_Target0 [[color(0)]];
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};
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fragment main0_out main0(constant type_View& View [[buffer(0)]], constant type_Globals& _Globals [[buffer(1)]], float4 _RESERVED_IDENTIFIER_FIXUP_gl_LastFragData [[color(0)]], texture2d<float> ShadowDepthTexture [[texture(0)]], sampler ShadowDepthTextureSampler [[sampler(0)]], float4 gl_FragCoord [[position]], uint gl_SampleID [[sample_id]])
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{
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main0_out out = {};
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gl_FragCoord.xy += get_sample_position(gl_SampleID) - 0.5;
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float4 _67 = _RESERVED_IDENTIFIER_FIXUP_gl_LastFragData;
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float _68 = _67.w;
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float4 _82 = _Globals.ScreenToShadowMatrix * float4((((gl_FragCoord.xy * View.View_BufferSizeAndInvSize.zw) - View.View_ScreenPositionScaleBias.wz) / View.View_ScreenPositionScaleBias.xy) * float2(_68), _68, 1.0);
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float _118 = fast::clamp(((fast::clamp((ShadowDepthTexture.sample(ShadowDepthTextureSampler, (((_82.xyz / float3(_82.w)).xy * _Globals.ShadowTileOffsetAndSize.zw).xy + _Globals.ShadowTileOffsetAndSize.xy).xy, level(0.0)).xxx * float3(_Globals.SoftTransitionScale.z)) - float3((fast::min(_82.z, 0.999989986419677734375) * _Globals.SoftTransitionScale.z) - 1.0), float3(0.0), float3(1.0)).x - 0.5) * _Globals.ShadowSharpen) + 0.5, 0.0, 1.0);
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float3 _127 = mix(_Globals.ModulatedShadowColor.xyz, float3(1.0), float3(mix(1.0, _118 * _118, _Globals.ShadowFadeFraction)));
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float4 _129 = float4(_127.x, _127.y, _127.z, _58.w);
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_129.w = 0.0;
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out.out_var_SV_Target0 = _129;
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return out;
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}
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