Merge branch 'clip-distance' into 'master'

Shader: skip initialization of all clip distances on macOS.

See merge request [ryubing/ryujinx!229](https://git.ryujinx.app/ryubing/ryujinx/-/merge_requests/229)

src/Ryujinx.Graphics.GAL/Capabilities.cs

@@ -10,6 +10,7 @@ namespace Ryujinx.Graphics.GAL
 
         public readonly bool HasFrontFacingBug;
         public readonly bool HasVectorIndexingBug;
+        public readonly bool HasClipDistanceInitBug;
         public readonly bool NeedsFragmentOutputSpecialization;
         public readonly bool ReduceShaderPrecision;
 
@@ -79,6 +80,7 @@ namespace Ryujinx.Graphics.GAL
             SystemMemoryType memoryType,
             bool hasFrontFacingBug,
             bool hasVectorIndexingBug,
+            bool hasClipDistanceInitBug,
             bool needsFragmentOutputSpecialization,
             bool reduceShaderPrecision,
             bool supportsAstcCompression,
@@ -141,6 +143,7 @@ namespace Ryujinx.Graphics.GAL
             MemoryType = memoryType;
             HasFrontFacingBug = hasFrontFacingBug;
             HasVectorIndexingBug = hasVectorIndexingBug;
+            HasClipDistanceInitBug = hasClipDistanceInitBug;
             NeedsFragmentOutputSpecialization = needsFragmentOutputSpecialization;
             ReduceShaderPrecision = reduceShaderPrecision;
             SupportsAstcCompression = supportsAstcCompression;

src/Ryujinx.Graphics.Gpu/Shader/GpuAccessorBase.cs

@@ -201,6 +201,8 @@ namespace Ryujinx.Graphics.Gpu.Shader
 
         public bool QueryHostHasVectorIndexingBug() => _context.Capabilities.HasVectorIndexingBug;
 
+        public bool QueryHostHasClipDistanceInitBug() => _context.Capabilities.HasClipDistanceInitBug;
+
         public int QueryHostStorageBufferOffsetAlignment() => _context.Capabilities.StorageBufferOffsetAlignment;
 
         public int QueryHostSubgroupSize() => _context.Capabilities.ShaderSubgroupSize;

src/Ryujinx.Graphics.OpenGL/OpenGLRenderer.cs

@@ -153,6 +153,7 @@ namespace Ryujinx.Graphics.OpenGL
                 memoryType: SystemMemoryType.BackendManaged,
                 hasFrontFacingBug: intelWindows,
                 hasVectorIndexingBug: amdWindows,
+                hasClipDistanceInitBug: false,
                 needsFragmentOutputSpecialization: false,
                 reduceShaderPrecision: false,
                 supportsAstcCompression: HwCapabilities.SupportsAstcCompression,

src/Ryujinx.Graphics.Shader/IGpuAccessor.cs

@@ -202,6 +202,15 @@ namespace Ryujinx.Graphics.Shader
             return false;
         }
 
+        /// <summary>
+        /// Queries host about the presence of the clip distance initialization bug.
+        /// </summary>
+        /// <returns>True if the bug is present on the host device used, false otherwise</returns>
+        bool QueryHostHasClipDistanceInitBug()
+        {
+            return false;
+        }
+
         /// <summary>
         /// Queries host storage buffer alignment required.
         /// </summary>

src/Ryujinx.Graphics.Shader/Translation/Translator.cs

@@ -259,11 +259,14 @@ namespace Ryujinx.Graphics.Shader.Translation
                 context.Store(StorageKind.Output, IoVariable.Position, null, Const(c), ConstF(c == 3 ? 1f : 0f));
             }
 
-            if (context.Program.ClipDistancesWritten != 0)
+            if (!context.TranslatorContext.GpuAccessor.QueryHostHasClipDistanceInitBug())
             {
-                for (int i = 0; i < 8; i++)
+                if (context.Program.ClipDistancesWritten != 0)
                 {
-                    context.Store(StorageKind.Output, IoVariable.ClipDistance, null, Const(i), ConstF(0f));
+                    for (int i = 0; i < 8; i++)
+                    {
+                        context.Store(StorageKind.Output, IoVariable.ClipDistance, null, Const(i), ConstF(0f));
+                    }
                 }
             }
         }

src/Ryujinx.Graphics.Vulkan/VulkanRenderer.cs

@@ -744,6 +744,7 @@ namespace Ryujinx.Graphics.Vulkan
                 memoryType: memoryType,
                 hasFrontFacingBug: IsIntelWindows,
                 hasVectorIndexingBug: IsQualcommProprietary,
+                hasClipDistanceInitBug: IsMoltenVk,
                 needsFragmentOutputSpecialization: IsMoltenVk,
                 reduceShaderPrecision: IsMoltenVk,
                 supportsAstcCompression: features2.Features.TextureCompressionAstcLdr && supportsAstcFormats,