[Adaptive Performance] Backport/6000.4/adp fix rendertexture size

Author: tylerfan

Packages/com.unity.render-pipelines.universal/Runtime/UniversalRenderPipeline.cs

@@ -2425,18 +2425,18 @@ static void ApplyAdaptivePerformance(UniversalCameraData cameraData)
             // TODO
             if (!cameraData.xr.enabled)
             {
-                cameraData.cameraTargetDescriptor.width = (int)(cameraData.camera.pixelWidth * cameraData.renderScale);
-                cameraData.cameraTargetDescriptor.height = (int)(cameraData.camera.pixelHeight * cameraData.renderScale);
+                cameraData.cameraTargetDescriptor.width = Mathf.Max(1, (int)(cameraData.pixelWidth * cameraData.renderScale));
+                cameraData.cameraTargetDescriptor.height = Mathf.Max(1, (int)(cameraData.pixelHeight * cameraData.renderScale));
 #if ENABLE_UPSCALER_FRAMEWORK
                 if (cameraData.upscalingFilter == ImageUpscalingFilter.IUpscaler)
                 {
                     // An IUpscaler is active. It might want to change the pre-upscale resolution. Negotiate with it.
                     IUpscaler activeUpscaler = upscaling.GetActiveUpscaler();
                     Debug.Assert(activeUpscaler != null);
-                    Vector2Int res = new Vector2Int(cameraData.cameraTargetDescriptor.width, cameraData.scaledHeight);
+                    Vector2Int res = new Vector2Int(cameraData.cameraTargetDescriptor.width, cameraData.cameraTargetDescriptor.height);
                     activeUpscaler.NegotiatePreUpscaleResolution(ref res, new Vector2Int(cameraData.pixelWidth, cameraData.pixelHeight));
-                    cameraData.cameraTargetDescriptor.width = res.x;
-                    cameraData.cameraTargetDescriptor.height = res.y;
+                    cameraData.cameraTargetDescriptor.width = Mathf.Max(1, res.x);
+                    cameraData.cameraTargetDescriptor.height = Mathf.Max(1, res.y);
                 }
 #endif
                 cameraData.scaledWidth = cameraData.cameraTargetDescriptor.width;