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, 5 insertions, 0 deletions

diff --git a/Ryujinx.Graphics.Gpu/GraphicsConfig.cs b/Ryujinx.Graphics.Gpu/GraphicsConfig.cs
index 4bda7c19..44b2b5e9 100644
--- a/Ryujinx.Graphics.Gpu/GraphicsConfig.cs
+++ b/Ryujinx.Graphics.Gpu/GraphicsConfig.cs
@@ -6,6 +6,11 @@ namespace Ryujinx.Graphics.Gpu
     public static class GraphicsConfig
     {
         /// <summary>
+        /// Resolution scale.
+        /// </summary>
+        public static float ResScale = 1f;
+
+        /// <summary>
         /// Max Anisotropy. Values range from 0 - 16. Set to -1 to let the game decide.
         /// </summary>
         public static float MaxAnisotropy;