Implement Zero-Configuration Resolution Scaling (#1365)

* Initial implementation of Render Target Scaling

Works with most games I have. No GUI option right now, it is hardcoded.

Missing handling for texelFetch operation.

* Realtime Configuration, refactoring.

* texelFetch scaling on fragment shader (WIP)

* Improve Shader-Side changes.

* Fix potential crash when no color/depth bound

* Workaround random uses of textures in compute.

This was blacklisting textures in a few games despite causing no bugs. Will eventually add full support so this doesn't break anything.

* Fix scales oscillating when changing between non-native scales.

* Scaled textures on compute, cleanup, lazier uniform update.

* Cleanup.

* Fix stupidity

* Address Thog Feedback.

* Cover most of GDK's feedback (two comments remain)

* Fix bad rename

* Move IsDepthStencil to FormatExtensions, add docs.

* Fix default config, square texture detection.

* Three final fixes:

- Nearest copy when texture is integer format.
- Texture2D -> Texture3D copy correctly blacklists the texture before trying an unscaled copy (caused driver error)
- Discount small textures.

* Remove scale threshold.

Not needed right now - we'll see if we run into problems.

* All CPU modification blacklists scale.

* Fix comment.

1 files changed, 24 insertions, 18 deletions

diff --git a/Ryujinx.Graphics.OpenGL/Image/TextureStorage.cs b/Ryujinx.Graphics.OpenGL/Image/TextureStorage.cs
index baf8e65d..4fc0a77f 100644
--- a/Ryujinx.Graphics.OpenGL/Image/TextureStorage.cs
+++ b/Ryujinx.Graphics.OpenGL/Image/TextureStorage.cs
@@ -1,12 +1,14 @@
 using OpenTK.Graphics.OpenGL;
 using Ryujinx.Common.Logging;
 using Ryujinx.Graphics.GAL;
+using System;
 
 namespace Ryujinx.Graphics.OpenGL.Image
 {
     class TextureStorage
     {
         public int Handle { get; private set; }
+        public float ScaleFactor { get; private set; }
 
         public TextureCreateInfo Info { get; }
 
@@ -14,12 +16,13 @@ namespace Ryujinx.Graphics.OpenGL.Image
 
         private int _viewsCount;
 
-        public TextureStorage(Renderer renderer, TextureCreateInfo info)
+        public TextureStorage(Renderer renderer, TextureCreateInfo info, float scaleFactor)
         {
             _renderer = renderer;
             Info      = info;
 
             Handle = GL.GenTexture();
+            ScaleFactor = scaleFactor;
 
             CreateImmutableStorage();
         }
@@ -32,6 +35,9 @@ namespace Ryujinx.Graphics.OpenGL.Image
 
             GL.BindTexture(target, Handle);
 
+            int width = (int)Math.Ceiling(Info.Width * ScaleFactor);
+            int height = (int)Math.Ceiling(Info.Height * ScaleFactor);
+
             FormatInfo format = FormatTable.GetFormatInfo(Info.Format);
 
             SizedInternalFormat internalFormat;
@@ -52,7 +58,7 @@ namespace Ryujinx.Graphics.OpenGL.Image
                         TextureTarget1d.Texture1D,
                         Info.Levels,
                         internalFormat,
-                        Info.Width);
+                        width);
                     break;
 
                 case Target.Texture1DArray:
@@ -60,8 +66,8 @@ namespace Ryujinx.Graphics.OpenGL.Image
                         TextureTarget2d.Texture1DArray,
                         Info.Levels,
                         internalFormat,
-                        Info.Width,
-                        Info.Height);
+                        width,
+                        height);
                     break;
 
                 case Target.Texture2D:
@@ -69,8 +75,8 @@ namespace Ryujinx.Graphics.OpenGL.Image
                         TextureTarget2d.Texture2D,
                         Info.Levels,
                         internalFormat,
-                        Info.Width,
-                        Info.Height);
+                        width,
+                        height);
                     break;
 
                 case Target.Texture2DArray:
@@ -78,8 +84,8 @@ namespace Ryujinx.Graphics.OpenGL.Image
                         TextureTarget3d.Texture2DArray,
                         Info.Levels,
                         internalFormat,
-                        Info.Width,
-                        Info.Height,
+                        width,
+                        height,
                         Info.Depth);
                     break;
 
@@ -88,8 +94,8 @@ namespace Ryujinx.Graphics.OpenGL.Image
                         TextureTargetMultisample2d.Texture2DMultisample,
                         Info.Samples,
                         internalFormat,
-                        Info.Width,
-                        Info.Height,
+                        width,
+                        height,
                         true);
                     break;
 
@@ -98,8 +104,8 @@ namespace Ryujinx.Graphics.OpenGL.Image
                         TextureTargetMultisample3d.Texture2DMultisampleArray,
                         Info.Samples,
                         internalFormat,
-                        Info.Width,
-                        Info.Height,
+                        width,
+                        height,
                         Info.Depth,
                         true);
                     break;
@@ -109,8 +115,8 @@ namespace Ryujinx.Graphics.OpenGL.Image
                         TextureTarget3d.Texture3D,
                         Info.Levels,
                         internalFormat,
-                        Info.Width,
-                        Info.Height,
+                        width,
+                        height,
                         Info.Depth);
                     break;
 
@@ -119,8 +125,8 @@ namespace Ryujinx.Graphics.OpenGL.Image
                         TextureTarget2d.TextureCubeMap,
                         Info.Levels,
                         internalFormat,
-                        Info.Width,
-                        Info.Height);
+                        width,
+                        height);
                     break;
 
                 case Target.CubemapArray:
@@ -128,8 +134,8 @@ namespace Ryujinx.Graphics.OpenGL.Image
                         (TextureTarget3d)All.TextureCubeMapArray,
                         Info.Levels,
                         internalFormat,
-                        Info.Width,
-                        Info.Height,
+                        width,
+                        height,
                         Info.Depth);
                     break;