Fix res scale parameters not being updated in vertex shader (#3046)

This fixes an issue where the render scale array would not be updated when technically the scales on the flat array were the same, but the start index for the vertex scales was different.

Ryujinx.Graphics.Gpu/Image/TextureBindingsManager.cs

@@ -49,6 +49,7 @@ namespace Ryujinx.Graphics.Gpu.Image
 
         private readonly float[] _scales;
         private bool _scaleChanged;
+        private int _lastFragmentTotal;
 
         /// <summary>
         /// Constructs a new instance of the texture bindings manager.
@@ -288,26 +289,30 @@ namespace Ryujinx.Graphics.Gpu.Image
         /// </summary>
         private void CommitRenderScale()
         {
-            if (_scaleChanged)
-            {
-                int fragmentTotal = 0;
-                int total;
+            // Stage 0 total: Compute or Vertex.
+            int total = _textureBindingsCount[0] + _imageBindingsCount[0];
 
-                if (!_isCompute)
-                {
-                    int fragmentIndex = (int)ShaderStage.Fragment - 1;
-                    fragmentTotal = _textureBindingsCount[fragmentIndex] + _imageBindingsCount[fragmentIndex];
+            int fragmentIndex = (int)ShaderStage.Fragment - 1;
+            int fragmentTotal = _isCompute ? 0 : (_textureBindingsCount[fragmentIndex] + _imageBindingsCount[fragmentIndex]);
 
-                    int vertexIndex = (int)ShaderStage.Vertex - 1;
-                    int vertexTotal = _textureBindingsCount[vertexIndex] + _imageBindingsCount[vertexIndex];
+            if (total != 0 && fragmentTotal != _lastFragmentTotal)
+            {
+                // Must update scales in the support buffer if:
+                // - Vertex stage has bindings.
+                // - Fragment stage binding count has been updated since last render scale update.
 
-                    total = fragmentTotal + vertexTotal;
-                }
-                else
+                _scaleChanged = true;
+            }
+
+            if (_scaleChanged)
+            {
+                if (!_isCompute)
                 {
-                    total = _textureBindingsCount[0] + _imageBindingsCount[0];
+                    total += fragmentTotal; // Add the fragment bindings to the total.
                 }
 
+                _lastFragmentTotal = fragmentTotal;
+
                 _context.Renderer.Pipeline.UpdateRenderScale(_scales, total, fragmentTotal);
 
                 _scaleChanged = false;