Implement MSAA in translucent rendering pass

Author: MaxKopacz

Sources/Rendering/WebGPU/OpaquePass/index.js

@@ -26,8 +26,18 @@ function vtkWebGPUOpaquePass(publicAPI, model) {
       ? viewNode.getSampleCount()
       : 1;
 
+    // If sampleCount changed since last render, tear down and recreate
+    if (model.renderEncoder && model._currentSampleCount !== sampleCount) {
+      model.renderEncoder = null;
+      model.colorTexture = null;
+      model.depthTexture = null;
+      model.resolveColorTexture = null;
+      model._resolveColorTextureView = null;
+    }
+
     if (!model.renderEncoder) {
       publicAPI.createRenderEncoder(sampleCount);
+      model._currentSampleCount = sampleCount;
 
       const width = viewNode.getCanvas().width;
       const height = viewNode.getCanvas().height;
@@ -67,9 +77,10 @@ function vtkWebGPUOpaquePass(publicAPI, model) {
             GPUTextureUsage.TEXTURE_BINDING |
             GPUTextureUsage.COPY_SRC,
         });
-        const resolveView = model.resolveColorTexture.createView(
+        model._resolveColorTextureView = model.resolveColorTexture.createView(
           'opaquePassColorTexture'
         );
+        const resolveView = model._resolveColorTextureView;
         model.renderEncoder.setResolveTextureView(0, resolveView);
       }
 
@@ -112,8 +123,8 @@ function vtkWebGPUOpaquePass(publicAPI, model) {
   // When MSAA is active, downstream passes must sample from the resolved
   // (1-sample) texture, not the multisampled one
   publicAPI.getColorTextureView = () => {
-    if (model.resolveColorTexture) {
-      return model.resolveColorTexture.createView('opaquePassColorTexture');
+    if (model._resolveColorTextureView) {
+      return model._resolveColorTextureView;
     }
     return model.renderEncoder.getColorTextureViews()[0];
   };