Avoid adding shader buffer descriptors for constant buffers that are not used (#3478)

* Avoid adding shader buffer descriptors for constant buffers that are not used

* Shader cache version

Ryujinx.Graphics.Gpu/Engine/Dma/DmaClass.cs

@@ -208,7 +208,6 @@ namespace Ryujinx.Graphics.Gpu.Engine.Dma
                 }
 
                 ReadOnlySpan<byte> srcSpan = memoryManager.GetSpan(srcGpuVa + (ulong)srcBaseOffset, srcSize, true);
-                Span<byte> dstSpan = memoryManager.GetSpan(dstGpuVa + (ulong)dstBaseOffset, dstSize).ToArray();
 
                 bool completeSource = IsTextureCopyComplete(src, srcLinear, srcBpp, srcStride, xCount, yCount);
                 bool completeDest = IsTextureCopyComplete(dst, dstLinear, dstBpp, dstStride, xCount, yCount);
@@ -262,20 +261,33 @@ namespace Ryujinx.Graphics.Gpu.Engine.Dma
                         target.SynchronizeMemory();
                         target.SetData(data);
                         target.SignalModified();
-
                         return;
                     }
                     else if (srcCalculator.LayoutMatches(dstCalculator))
                     {
-                        srcSpan.CopyTo(dstSpan); // No layout conversion has to be performed, just copy the data entirely.
+                        // No layout conversion has to be performed, just copy the data entirely.
-
+                        memoryManager.Write(dstGpuVa + (ulong)dstBaseOffset, srcSpan);
-                        memoryManager.Write(dstGpuVa + (ulong)dstBaseOffset, dstSpan);
-
                         return;
                     }
                 }
 
                 unsafe bool Convert<T>(Span<byte> dstSpan, ReadOnlySpan<byte> srcSpan) where T : unmanaged
+                {
+                    if (srcLinear && dstLinear && srcBpp == dstBpp)
+                    {
+                        // Optimized path for purely linear copies - we don't need to calculate every single byte offset,
+                        // and we can make use of Span.CopyTo which is very very fast (even compared to pointers)
+                        for (int y = 0; y < yCount; y++)
+                        {
+                            srcCalculator.SetY(srcRegionY + y);
+                            dstCalculator.SetY(dstRegionY + y);
+                            int srcOffset = srcCalculator.GetOffset(srcRegionX);
+                            int dstOffset = dstCalculator.GetOffset(dstRegionX);
+                            srcSpan.Slice(srcOffset - srcBaseOffset, xCount * srcBpp)
+                                .CopyTo(dstSpan.Slice(dstOffset - dstBaseOffset, xCount * dstBpp));
+                        }
+                    }
+                    else
                     {
                         fixed (byte* dstPtr = dstSpan, srcPtr = srcSpan)
                         {
@@ -296,9 +308,16 @@ namespace Ryujinx.Graphics.Gpu.Engine.Dma
                                 }
                             }
                         }
+                    }
+
                     return true;
                 }
 
+                // OPT: This allocates a (potentially) huge temporary array and then copies an existing
+                // region of memory into it, data that might get overwritten entirely anyways. Ideally this should
+                // all be rewritten to use pooled arrays, but that gets complicated with packed data and strides
+                Span<byte> dstSpan = memoryManager.GetSpan(dstGpuVa + (ulong)dstBaseOffset, dstSize).ToArray();
+
                 bool _ = srcBpp switch
                 {
                     1 => Convert<byte>(dstSpan, srcSpan),

Ryujinx.Graphics.Gpu/Image/TextureCache.cs

@@ -174,6 +174,14 @@ namespace Ryujinx.Graphics.Gpu.Image
                 }
             }
 
+            if (info.Width == info.Height * info.Height)
+            {
+                // Possibly used for a "3D texture" drawn onto a 2D surface.
+                // Some games do this to generate a tone mapping LUT without rendering into 3D texture slices.
+
+                return false;
+            }
+
             return true;
         }
 

Ryujinx.Graphics.Gpu/Shader/DiskCache/DiskCacheHostStorage.cs

@@ -21,7 +21,7 @@ namespace Ryujinx.Graphics.Gpu.Shader.DiskCache
         private const ushort FileFormatVersionMajor = 1;
         private const ushort FileFormatVersionMinor = 1;
         private const uint FileFormatVersionPacked = ((uint)FileFormatVersionMajor << 16) | FileFormatVersionMinor;
-        private const uint CodeGenVersion = 3457;
+        private const uint CodeGenVersion = 3478;
 
         private const string SharedTocFileName = "shared.toc";
         private const string SharedDataFileName = "shared.data";

Ryujinx.Graphics.Shader/Instructions/InstEmitHelper.cs

@@ -45,12 +45,12 @@ namespace Ryujinx.Graphics.Shader.Instructions
             if (isFP64)
             {
                 return context.PackDouble2x32(
-                    context.Config.CreateCbuf(cbufSlot, cbufOffset),
+                    Cbuf(cbufSlot, cbufOffset),
-                    context.Config.CreateCbuf(cbufSlot, cbufOffset + 1));
+                    Cbuf(cbufSlot, cbufOffset + 1));
             }
             else
             {
-                return context.Config.CreateCbuf(cbufSlot, cbufOffset);
+                return Cbuf(cbufSlot, cbufOffset);
             }
         }
 

Ryujinx.Graphics.Shader/StructuredIr/StructuredProgramContext.cs

@@ -300,6 +300,11 @@ namespace Ryujinx.Graphics.Shader.StructuredIr
 
             if (operand.Type != OperandType.LocalVariable)
             {
+                if (operand.Type == OperandType.ConstantBuffer)
+                {
+                    Config.SetUsedConstantBuffer(operand.GetCbufSlot());
+                }
+
                 return new AstOperand(operand);
             }
 

Ryujinx.Graphics.Shader/Translation/Optimizations/GlobalToStorage.cs

@@ -68,7 +68,7 @@ namespace Ryujinx.Graphics.Shader.Translation.Optimizations
             {
                 Operand addrLow = operation.GetSource(0);
 
-                Operand baseAddrLow = config.CreateCbuf(0, GetStorageCbOffset(config.Stage, storageIndex));
+                Operand baseAddrLow = Cbuf(0, GetStorageCbOffset(config.Stage, storageIndex));
 
                 Operand baseAddrTrunc = Local();
 
@@ -152,7 +152,7 @@ namespace Ryujinx.Graphics.Shader.Translation.Optimizations
             {
                 Operand addrLow = operation.GetSource(0);
 
-                Operand baseAddrLow = config.CreateCbuf(0, UbeBaseOffset + storageIndex * StorageDescSize);
+                Operand baseAddrLow = Cbuf(0, UbeBaseOffset + storageIndex * StorageDescSize);
 
                 Operand baseAddrTrunc = Local();
 

Ryujinx.Graphics.Shader/Translation/Rewriter.cs

@@ -75,9 +75,9 @@ namespace Ryujinx.Graphics.Shader.Translation
 
                 int cbOffset = GetStorageCbOffset(config.Stage, slot);
 
-                Operand baseAddrLow  = config.CreateCbuf(0, cbOffset);
+                Operand baseAddrLow  = Cbuf(0, cbOffset);
-                Operand baseAddrHigh = config.CreateCbuf(0, cbOffset + 1);
+                Operand baseAddrHigh = Cbuf(0, cbOffset + 1);
-                Operand size         = config.CreateCbuf(0, cbOffset + 2);
+                Operand size         = Cbuf(0, cbOffset + 2);
 
                 Operand offset = PrependOperation(Instruction.Subtract,       addrLow, baseAddrLow);
                 Operand borrow = PrependOperation(Instruction.CompareLessU32, addrLow, baseAddrLow);

Ryujinx.Graphics.Shader/Translation/ShaderConfig.cs

@@ -360,12 +360,6 @@ namespace Ryujinx.Graphics.Shader.Translation
             UsedFeatures |= flags;
         }
 
-        public Operand CreateCbuf(int slot, int offset)
-        {
-            SetUsedConstantBuffer(slot);
-            return OperandHelper.Cbuf(slot, offset);
-        }
-
         public void SetUsedConstantBuffer(int slot)
         {
             _usedConstantBuffers |= 1 << slot;