6 files changed, 114 insertions, 106 deletions
diff --git a/src/Ryujinx.Graphics.Gpu/Image/Texture.cs b/src/Ryujinx.Graphics.Gpu/Image/Texture.cs
index 0427d09b..a7af1aad 100644
--- a/src/Ryujinx.Graphics.Gpu/Image/Texture.cs
+++ b/src/Ryujinx.Graphics.Gpu/Image/Texture.cs
@@ -1170,6 +1170,7 @@ namespace Ryujinx.Graphics.Gpu.Image
         /// <param name="caps">Host GPU capabilities</param>
         /// <param name="firstLayer">Texture view initial layer on this texture</param>
         /// <param name="firstLevel">Texture view first mipmap level on this texture</param>
+        /// <param name="flags">Texture search flags</param>
         /// <returns>The level of compatiblilty a view with the given parameters created from this texture has</returns>
         public TextureViewCompatibility IsViewCompatible(
             TextureInfo info,
@@ -1178,11 +1179,12 @@ namespace Ryujinx.Graphics.Gpu.Image
             int layerSize,
             Capabilities caps,
             out int firstLayer,
-            out int firstLevel)
+            out int firstLevel,
+            TextureSearchFlags flags = TextureSearchFlags.None)
         {
             TextureViewCompatibility result = TextureViewCompatibility.Full;
 
-            result = TextureCompatibility.PropagateViewCompatibility(result, TextureCompatibility.ViewFormatCompatible(Info, info, caps));
+            result = TextureCompatibility.PropagateViewCompatibility(result, TextureCompatibility.ViewFormatCompatible(Info, info, caps, flags));
             if (result != TextureViewCompatibility.Incompatible)
             {
                 result = TextureCompatibility.PropagateViewCompatibility(result, TextureCompatibility.ViewTargetCompatible(Info, info, ref caps));
diff --git a/src/Ryujinx.Graphics.Gpu/Image/TextureCache.cs b/src/Ryujinx.Graphics.Gpu/Image/TextureCache.cs
index 49191239..bccd3fd7 100644
--- a/src/Ryujinx.Graphics.Gpu/Image/TextureCache.cs
+++ b/src/Ryujinx.Graphics.Gpu/Image/TextureCache.cs
@@ -569,7 +569,7 @@ namespace Ryujinx.Graphics.Gpu.Image
 
             Texture texture = null;
 
-            TextureMatchQuality bestQuality = TextureMatchQuality.NoMatch;
+            long bestSequence = 0;
 
             for (int index = 0; index < sameAddressOverlapsCount; index++)
             {
@@ -601,17 +601,12 @@ namespace Ryujinx.Graphics.Gpu.Image
                             continue;
                         }
                     }
-                }
 
-                if (matchQuality == TextureMatchQuality.Perfect)
-                {
-                    texture = overlap;
-                    break;
-                }
-                else if (matchQuality > bestQuality)
-                {
-                    texture = overlap;
-                    bestQuality = matchQuality;
+                    if (texture == null || overlap.Group.ModifiedSequence - bestSequence > 0)
+                    {
+                        texture = overlap;
+                        bestSequence = overlap.Group.ModifiedSequence;
+                    }
                 }
             }
 
@@ -664,6 +659,7 @@ namespace Ryujinx.Graphics.Gpu.Image
             int fullyCompatible = 0;
 
             // Evaluate compatibility of overlaps, add temporary references
+            int preferredOverlap = -1;
 
             for (int index = 0; index < overlapsCount; index++)
             {
@@ -675,17 +671,26 @@ namespace Ryujinx.Graphics.Gpu.Image
                     sizeInfo.LayerSize,
                     _context.Capabilities,
                     out int firstLayer,
-                    out int firstLevel);
+                    out int firstLevel,
+                    flags);
 
-                if (overlapCompatibility == TextureViewCompatibility.Full)
+                if (overlapCompatibility >= TextureViewCompatibility.FormatAlias)
                 {
                     if (overlap.IsView)
                     {
-                        overlapCompatibility = TextureViewCompatibility.CopyOnly;
+                        overlapCompatibility = overlapCompatibility == TextureViewCompatibility.FormatAlias ?
+                            TextureViewCompatibility.Incompatible :
+                            TextureViewCompatibility.CopyOnly;
                     }
                     else
                     {
                         fullyCompatible++;
+
+                        if (preferredOverlap == -1 || overlap.Group.ModifiedSequence - bestSequence > 0)
+                        {
+                            preferredOverlap = index;
+                            bestSequence = overlap.Group.ModifiedSequence;
+                        }
                     }
                 }
 
@@ -695,37 +700,50 @@ namespace Ryujinx.Graphics.Gpu.Image
 
             // Search through the overlaps to find a compatible view and establish any copy dependencies.
 
-            for (int index = 0; index < overlapsCount; index++)
+            if (preferredOverlap != -1)
             {
-                Texture overlap = _textureOverlaps[index];
-                OverlapInfo oInfo = _overlapInfo[index];
+                Texture overlap = _textureOverlaps[preferredOverlap];
+                OverlapInfo oInfo = _overlapInfo[preferredOverlap];
+
+                bool aliased = oInfo.Compatibility == TextureViewCompatibility.FormatAlias;
 
-                if (oInfo.Compatibility == TextureViewCompatibility.Full)
+                if (!isSamplerTexture)
                 {
-                    if (!isSamplerTexture)
-                    {
-                        // If this is not a sampler texture, the size might be different from the requested size,
-                        // so we need to make sure the texture information has the correct size for this base texture,
-                        // before creating the view.
-                        info = info.CreateInfoForLevelView(overlap, oInfo.FirstLevel);
-                    }
+                    // If this is not a sampler texture, the size might be different from the requested size,
+                    // so we need to make sure the texture information has the correct size for this base texture,
+                    // before creating the view.
 
-                    texture = overlap.CreateView(info, sizeInfo, range.Value, oInfo.FirstLayer, oInfo.FirstLevel);
-                    texture.SynchronizeMemory();
-                    break;
+                    info = info.CreateInfoForLevelView(overlap, oInfo.FirstLevel, aliased);
+                }
+                else if (aliased)
+                {
+                    // The format must be changed to match the parent.
+                    info = info.CreateInfoWithFormat(overlap.Info.FormatInfo);
                 }
-                else if (oInfo.Compatibility == TextureViewCompatibility.CopyOnly && fullyCompatible == 0)
+
+                texture = overlap.CreateView(info, sizeInfo, range.Value, oInfo.FirstLayer, oInfo.FirstLevel);
+                texture.SynchronizeMemory();
+            }
+            else
+            {
+                for (int index = 0; index < overlapsCount; index++)
                 {
-                    // Only copy compatible. If there's another choice for a FULLY compatible texture, choose that instead.
+                    Texture overlap = _textureOverlaps[index];
+                    OverlapInfo oInfo = _overlapInfo[index];
+
+                    if (oInfo.Compatibility == TextureViewCompatibility.CopyOnly && fullyCompatible == 0)
+                    {
+                        // Only copy compatible. If there's another choice for a FULLY compatible texture, choose that instead.
 
-                    texture = new Texture(_context, _physicalMemory, info, sizeInfo, range.Value, scaleMode);
+                        texture = new Texture(_context, _physicalMemory, info, sizeInfo, range.Value, scaleMode);
 
-                    texture.InitializeGroup(true, true, new List<TextureIncompatibleOverlap>());
-                    texture.InitializeData(false, false);
+                        texture.InitializeGroup(true, true, new List<TextureIncompatibleOverlap>());
+                        texture.InitializeData(false, false);
 
-                    overlap.SynchronizeMemory();
-                    overlap.CreateCopyDependency(texture, oInfo.FirstLayer, oInfo.FirstLevel, true);
-                    break;
+                        overlap.SynchronizeMemory();
+                        overlap.CreateCopyDependency(texture, oInfo.FirstLayer, oInfo.FirstLevel, true);
+                        break;
+                    }
                 }
             }
 
@@ -740,7 +758,7 @@ namespace Ryujinx.Graphics.Gpu.Image
                     Texture overlap = _textureOverlaps[index];
                     OverlapInfo oInfo = _overlapInfo[index];
 
-                    if (oInfo.Compatibility <= TextureViewCompatibility.LayoutIncompatible)
+                    if (oInfo.Compatibility <= TextureViewCompatibility.LayoutIncompatible || oInfo.Compatibility == TextureViewCompatibility.FormatAlias)
                     {
                         if (!overlap.IsView && texture.DataOverlaps(overlap, oInfo.Compatibility))
                         {
diff --git a/src/Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs b/src/Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs
index 5d846222..85ad0bb0 100644
--- a/src/Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs
+++ b/src/Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs
@@ -291,22 +291,7 @@ namespace Ryujinx.Graphics.Gpu.Image
         /// <returns>The minimum compatibility level of two provided view compatibility results</returns>
         public static TextureViewCompatibility PropagateViewCompatibility(TextureViewCompatibility first, TextureViewCompatibility second)
         {
-            if (first == TextureViewCompatibility.Incompatible || second == TextureViewCompatibility.Incompatible)
-            {
-                return TextureViewCompatibility.Incompatible;
-            }
-            else if (first == TextureViewCompatibility.LayoutIncompatible || second == TextureViewCompatibility.LayoutIncompatible)
-            {
-                return TextureViewCompatibility.LayoutIncompatible;
-            }
-            else if (first == TextureViewCompatibility.CopyOnly || second == TextureViewCompatibility.CopyOnly)
-            {
-                return TextureViewCompatibility.CopyOnly;
-            }
-            else
-            {
-                return TextureViewCompatibility.Full;
-            }
+            return (TextureViewCompatibility)Math.Min((int)first, (int)second);
         }
 
         /// <summary>
@@ -628,15 +613,21 @@ namespace Ryujinx.Graphics.Gpu.Image
         /// <param name="lhs">Texture information of the texture view</param>
         /// <param name="rhs">Texture information of the texture view</param>
         /// <param name="caps">Host GPU capabilities</param>
+        /// <param name="flags">Texture search flags</param>
         /// <returns>The view compatibility level of the texture formats</returns>
-        public static TextureViewCompatibility ViewFormatCompatible(TextureInfo lhs, TextureInfo rhs, Capabilities caps)
+        public static TextureViewCompatibility ViewFormatCompatible(TextureInfo lhs, TextureInfo rhs, Capabilities caps, TextureSearchFlags flags)
         {
             FormatInfo lhsFormat = lhs.FormatInfo;
             FormatInfo rhsFormat = rhs.FormatInfo;
 
             if (lhsFormat.Format.IsDepthOrStencil() || rhsFormat.Format.IsDepthOrStencil())
             {
-                return lhsFormat.Format == rhsFormat.Format ? TextureViewCompatibility.Full : TextureViewCompatibility.Incompatible;
+                return FormatMatches(lhs, rhs, flags.HasFlag(TextureSearchFlags.ForSampler), flags.HasFlag(TextureSearchFlags.DepthAlias)) switch
+                {
+                    TextureMatchQuality.Perfect => TextureViewCompatibility.Full,
+                    TextureMatchQuality.FormatAlias => TextureViewCompatibility.FormatAlias,
+                    _ => TextureViewCompatibility.Incompatible
+                };
             }
 
             if (IsFormatHostIncompatible(lhs, caps) || IsFormatHostIncompatible(rhs, caps))
@@ -755,49 +746,6 @@ namespace Ryujinx.Graphics.Gpu.Image
         }
 
         /// <summary>
-        /// Checks if a swizzle component in two textures functionally match, taking into account if the components are defined.
-        /// </summary>
-        /// <param name="lhs">Texture information to compare</param>
-        /// <param name="rhs">Texture information to compare with</param>
-        /// <param name="swizzleLhs">Swizzle component for the first texture</param>
-        /// <param name="swizzleRhs">Swizzle component for the second texture</param>
-        /// <param name="component">Component index, starting at 0 for red</param>
-        /// <returns>True if the swizzle components functionally match, false othersize</returns>
-        private static bool SwizzleComponentMatches(TextureInfo lhs, TextureInfo rhs, SwizzleComponent swizzleLhs, SwizzleComponent swizzleRhs, int component)
-        {
-            int lhsComponents = lhs.FormatInfo.Components;
-            int rhsComponents = rhs.FormatInfo.Components;
-
-            if (lhsComponents == 4 && rhsComponents == 4)
-            {
-                return swizzleLhs == swizzleRhs;
-            }
-
-            // Swizzles after the number of components a format defines are "undefined".
-            // We allow these to not be equal under certain circumstances.
-            // This can only happen when there are less than 4 components in a format.
-            // It tends to happen when float depth textures are sampled.
-
-            bool lhsDefined = (swizzleLhs - SwizzleComponent.Red) < lhsComponents;
-            bool rhsDefined = (swizzleRhs - SwizzleComponent.Red) < rhsComponents;
-
-            if (lhsDefined == rhsDefined)
-            {
-                // If both are undefined, return true. Otherwise just check if they're equal.
-                return lhsDefined ? swizzleLhs == swizzleRhs : true;
-            }
-            else
-            {
-                SwizzleComponent defined = lhsDefined ? swizzleLhs : swizzleRhs;
-                SwizzleComponent undefined = lhsDefined ? swizzleRhs : swizzleLhs;
-
-                // Undefined swizzle can be matched by a forced value (0, 1), exact equality, or expected value.
-                // For example, R___ matches R001, RGBA but not RBGA.
-                return defined == undefined || defined < SwizzleComponent.Red || defined == SwizzleComponent.Red + component;
-            }
-        }
-
-        /// <summary>
         /// Checks if the texture shader sampling parameters of two texture informations match.
         /// </summary>
         /// <param name="lhs">Texture information to compare</param>
@@ -806,10 +754,10 @@ namespace Ryujinx.Graphics.Gpu.Image
         public static bool SamplerParamsMatches(TextureInfo lhs, TextureInfo rhs)
         {
             return lhs.DepthStencilMode == rhs.DepthStencilMode &&
-                   SwizzleComponentMatches(lhs, rhs, lhs.SwizzleR, rhs.SwizzleR, 0) &&
-                   SwizzleComponentMatches(lhs, rhs, lhs.SwizzleG, rhs.SwizzleG, 1) &&
-                   SwizzleComponentMatches(lhs, rhs, lhs.SwizzleB, rhs.SwizzleB, 2) &&
-                   SwizzleComponentMatches(lhs, rhs, lhs.SwizzleA, rhs.SwizzleA, 3);
+                   lhs.SwizzleR == rhs.SwizzleR &&
+                   lhs.SwizzleG == rhs.SwizzleG &&
+                   lhs.SwizzleB == rhs.SwizzleB &&
+                   lhs.SwizzleA == rhs.SwizzleA;
         }
 
         /// <summary>
diff --git a/src/Ryujinx.Graphics.Gpu/Image/TextureGroup.cs b/src/Ryujinx.Graphics.Gpu/Image/TextureGroup.cs
index b36b16e9..2fa1e79e 100644
--- a/src/Ryujinx.Graphics.Gpu/Image/TextureGroup.cs
+++ b/src/Ryujinx.Graphics.Gpu/Image/TextureGroup.cs
@@ -68,6 +68,11 @@ namespace Ryujinx.Graphics.Gpu.Image
         /// </summary>
         public bool HasIncompatibleOverlaps => _incompatibleOverlaps.Count > 0;
 
+        /// <summary>
+        /// Number indicating the order this texture group was modified relative to others.
+        /// </summary>
+        public long ModifiedSequence { get; private set; }
+
         private readonly GpuContext _context;
         private readonly PhysicalMemory _physicalMemory;
 
@@ -664,6 +669,8 @@ namespace Ryujinx.Graphics.Gpu.Image
         /// <param name="texture">The texture that has been modified</param>
         public void SignalModified(Texture texture)
         {
+            ModifiedSequence = _context.GetModifiedSequence();
+
             ClearIncompatibleOverlaps(texture);
 
             EvaluateRelevantHandles(texture, (baseHandle, regionCount, split) =>
@@ -684,6 +691,8 @@ namespace Ryujinx.Graphics.Gpu.Image
         /// <param name="bound">True if this texture is being bound, false if unbound</param>
         public void SignalModifying(Texture texture, bool bound)
         {
+            ModifiedSequence = _context.GetModifiedSequence();
+
             ClearIncompatibleOverlaps(texture);
 
             EvaluateRelevantHandles(texture, (baseHandle, regionCount, split) =>
diff --git a/src/Ryujinx.Graphics.Gpu/Image/TextureInfo.cs b/src/Ryujinx.Graphics.Gpu/Image/TextureInfo.cs
index a7ee12bc..1994d226 100644
--- a/src/Ryujinx.Graphics.Gpu/Image/TextureInfo.cs
+++ b/src/Ryujinx.Graphics.Gpu/Image/TextureInfo.cs
@@ -300,8 +300,9 @@ namespace Ryujinx.Graphics.Gpu.Image
         /// </summary>
         /// <param name="parent">The parent texture</param>
         /// <param name="firstLevel">The first level of the texture view</param>
+        /// <param name="parentFormat">True if the parent format should be inherited</param>
         /// <returns>The adjusted texture information with the new size</returns>
-        public TextureInfo CreateInfoForLevelView(Texture parent, int firstLevel)
+        public TextureInfo CreateInfoForLevelView(Texture parent, int firstLevel, bool parentFormat)
         {
             // When the texture is used as view of another texture, we must
             // ensure that the sizes are valid, otherwise data uploads would fail
@@ -370,7 +371,36 @@ namespace Ryujinx.Graphics.Gpu.Image
                 GobBlocksInZ,
                 GobBlocksInTileX,
                 target,
-                FormatInfo,
+                parentFormat ? parent.Info.FormatInfo : FormatInfo,
+                DepthStencilMode,
+                SwizzleR,
+                SwizzleG,
+                SwizzleB,
+                SwizzleA);
+        }
+
+        /// <summary>
+        /// Creates texture information for a given format and this information.
+        /// </summary>
+        /// <param name="formatInfo">Format for the new texture info</param>
+        /// <returns>New info with the specified format</returns>
+        public TextureInfo CreateInfoWithFormat(FormatInfo formatInfo)
+        {
+            return new TextureInfo(
+                GpuAddress,
+                Width,
+                Height,
+                DepthOrLayers,
+                Levels,
+                SamplesInX,
+                SamplesInY,
+                Stride,
+                IsLinear,
+                GobBlocksInY,
+                GobBlocksInZ,
+                GobBlocksInTileX,
+                Target,
+                formatInfo,
                 DepthStencilMode,
                 SwizzleR,
                 SwizzleG,
diff --git a/src/Ryujinx.Graphics.Gpu/Image/TextureViewCompatibility.cs b/src/Ryujinx.Graphics.Gpu/Image/TextureViewCompatibility.cs
index b89936eb..dfa688c4 100644
--- a/src/Ryujinx.Graphics.Gpu/Image/TextureViewCompatibility.cs
+++ b/src/Ryujinx.Graphics.Gpu/Image/TextureViewCompatibility.cs
@@ -9,6 +9,7 @@
         Incompatible = 0,
         LayoutIncompatible,
         CopyOnly,
+        FormatAlias,
         Full
     }
 }