From b530f0e1104723b894695b2860cf0f568f24cc9a Mon Sep 17 00:00:00 2001
From: riperiperi <rhy3756547@hotmail.com>
Date: Tue, 2 Mar 2021 22:30:54 +0000
Subject: Texture Cache: "Texture Groups" and "Texture Dependencies" (#2001)

* Initial implementation (3d tex mips broken)

This works rather well for most games, just need to fix 3d texture mips.

* Cleanup

* Address feedback

* Copy Dependencies and various other fixes

* Fix layer/level offset for copy from view<->view.

* Remove dirty flag from dependency

The dirty flag behaviour is not needed - DeferredCopy is all we need.

* Fix tracking mip slices.

* Propagate granularity (fix astral chain)

* Address Feedback pt 1

* Save slice sizes as part of SizeInfo

* Fix nits

* Fix disposing multiple dependencies causing a crash

This list is obviously modified when removing dependencies, so create a copy of it.
---
 Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs | 41 +++++++++++++++++++---
 1 file changed, 37 insertions(+), 4 deletions(-)

(limited to 'Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs')

diff --git a/Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs b/Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs
index e3574be5..d613612f 100644
--- a/Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs
+++ b/Ryujinx.Graphics.Gpu/Image/TextureCompatibility.cs
@@ -215,7 +215,7 @@ namespace Ryujinx.Graphics.Gpu.Image
         /// <param name="lhs">Texture information of the texture view</param>
         /// <param name="rhs">Texture information of the texture view to match against</param>
         /// <param name="level">Mipmap level of the texture view in relation to this texture</param>
-        /// <returns>True if the sizes are compatible, false otherwise</returns>
+        /// <returns>The view compatibility level of the view sizes</returns>
         public static TextureViewCompatibility ViewSizeMatches(TextureInfo lhs, TextureInfo rhs, int level)
         {
             Size size = GetAlignedSize(lhs, level);
@@ -235,6 +235,27 @@ namespace Ryujinx.Graphics.Gpu.Image
                     size.Height == otherSize.Height) ? result : TextureViewCompatibility.Incompatible;
         }
 
+        /// <summary>
+        /// Checks if the potential child texture fits within the level and layer bounds of the parent.
+        /// </summary>
+        /// <param name="parent">Texture information for the parent</param>
+        /// <param name="child">Texture information for the child</param>
+        /// <param name="layer">Base layer of the child texture</param>
+        /// <param name="level">Base level of the child texture</param>
+        /// <returns>Full compatiblity if the child's layer and level count fit within the parent, incompatible otherwise</returns>
+        public static TextureViewCompatibility ViewSubImagesInBounds(TextureInfo parent, TextureInfo child, int layer, int level)
+        {
+            if (level + child.Levels <= parent.Levels &&
+                layer + child.GetSlices() <= parent.GetSlices())
+            {
+                return TextureViewCompatibility.Full;
+            }
+            else
+            {
+                return TextureViewCompatibility.Incompatible;
+            }
+        }
+
         /// <summary>
         /// Checks if the texture sizes of the supplied texture informations match.
         /// </summary>
@@ -382,10 +403,22 @@ namespace Ryujinx.Graphics.Gpu.Image
         /// </summary>
         /// <param name="lhs">Texture information of the texture view</param>
         /// <param name="rhs">Texture information of the texture view</param>
-        /// <returns>True if the formats are compatible, false otherwise</returns>
-        public static bool ViewFormatCompatible(TextureInfo lhs, TextureInfo rhs)
+        /// <returns>The view compatibility level of the texture formats</returns>
+        public static TextureViewCompatibility ViewFormatCompatible(TextureInfo lhs, TextureInfo rhs)
         {
-            return FormatCompatible(lhs.FormatInfo, rhs.FormatInfo);
+            if (FormatCompatible(lhs.FormatInfo, rhs.FormatInfo))
+            {
+                if (lhs.FormatInfo.IsCompressed != rhs.FormatInfo.IsCompressed)
+                {
+                    return TextureViewCompatibility.CopyOnly;
+                }
+                else
+                {
+                    return TextureViewCompatibility.Full;
+                }
+            }
+
+            return TextureViewCompatibility.Incompatible;
         }
 
         /// <summary>
-- 
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