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.

Ryujinx.Graphics.Gpu/Image/TexturePool.cs

@@ -174,7 +174,7 @@ namespace Ryujinx.Graphics.Gpu.Image
                 swizzleB,
                 swizzleA);
 
-            if (IsDepthStencil(formatInfo.Format))
+            if (formatInfo.Format.IsDepthOrStencil())
             {
                 swizzleR = SwizzleComponent.Red;
                 swizzleG = SwizzleComponent.Red;
@@ -263,26 +263,6 @@ namespace Ryujinx.Graphics.Gpu.Image
                    component == SwizzleComponent.Green;
         }
 
-        /// <summary>
-        /// Checks if the texture format is a depth, stencil or depth-stencil format.
-        /// </summary>
-        /// <param name="format">Texture format</param>
-        /// <returns>True if the format is a depth, stencil or depth-stencil format, false otherwise</returns>
-        private static bool IsDepthStencil(Format format)
-        {
-            switch (format)
-            {
-                case Format.D16Unorm:
-                case Format.D24UnormS8Uint:
-                case Format.D24X8Unorm:
-                case Format.D32Float:
-                case Format.D32FloatS8Uint:
-                    return true;
-            }
-
-            return false;
-        }
-
         /// <summary>
         /// Decrements the reference count of the texture.
         /// This indicates that the texture pool is not using it anymore.