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.OpenGL/Image/TextureCopy.cs

@@ -33,6 +33,11 @@ namespace Ryujinx.Graphics.OpenGL.Image
 
             ClearBufferMask mask = GetMask(src.Format);
 
+            if ((mask & (ClearBufferMask.DepthBufferBit | ClearBufferMask.StencilBufferBit)) != 0 || src.Format.IsInteger())
+            {
+                linearFilter = false;
+            }
+
             BlitFramebufferFilter filter = linearFilter
                 ? BlitFramebufferFilter.Linear
                 : BlitFramebufferFilter.Nearest;
@@ -55,6 +60,9 @@ namespace Ryujinx.Graphics.OpenGL.Image
                 mask,
                 filter);
 
+            Attach(FramebufferTarget.ReadFramebuffer, src.Format, 0);
+            Attach(FramebufferTarget.DrawFramebuffer, dst.Format, 0);
+
             GL.BindFramebuffer(FramebufferTarget.ReadFramebuffer, oldReadFramebufferHandle);
             GL.BindFramebuffer(FramebufferTarget.DrawFramebuffer, oldDrawFramebufferHandle);