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, 6 insertions, 5 deletions

diff --git a/Ryujinx.Graphics.OpenGL/Image/TextureCopyUnscaled.cs b/Ryujinx.Graphics.OpenGL/Image/TextureCopyUnscaled.cs
index 28401138..02ae3b58 100644
--- a/Ryujinx.Graphics.OpenGL/Image/TextureCopyUnscaled.cs
+++ b/Ryujinx.Graphics.OpenGL/Image/TextureCopyUnscaled.cs
@@ -15,15 +15,16 @@ namespace Ryujinx.Graphics.OpenGL.Image
             int srcLayer,
             int dstLayer,
             int srcLevel,
-            int dstLevel)
+            int dstLevel,
+            float scaleFactor = 1f)
         {
-            int srcWidth  = srcInfo.Width;
-            int srcHeight = srcInfo.Height;
+            int srcWidth  = (int)Math.Ceiling(srcInfo.Width * scaleFactor);
+            int srcHeight = (int)Math.Ceiling(srcInfo.Height * scaleFactor);
             int srcDepth  = srcInfo.GetDepthOrLayers();
             int srcLevels = srcInfo.Levels;
 
-            int dstWidth  = dstInfo.Width;
-            int dstHeight = dstInfo.Height;
+            int dstWidth  = (int)Math.Ceiling(dstInfo.Width * scaleFactor);
+            int dstHeight = (int)Math.Ceiling(dstInfo.Height * scaleFactor);
             int dstDepth  = dstInfo.GetDepthOrLayers();
             int dstLevels = dstInfo.Levels;