Call prepareForDisplayWithPaint so that WebGL buffers get cleared.

https://bugs.webkit.org/show_bug.cgi?id=244877 Reviewed by Chris Lord. WebGLRenderingContextBase needs this to be called, so that paintRenderingResultsToCanvas() knows that this is a 'display' and clears the back buffer. * Source/WebCore/html/OffscreenCanvas.cpp: (WebCore::OffscreenCanvas::commitToPlaceholderCanvas): Canonical link: https://commits.webkit.org/254259@main
WebKit · Sep 8, 2022 · 0f38a84 · 0f38a84
1 parent 74baf93
commit 0f38a84
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/Source/WebCore/html/OffscreenCanvas.cpp b/Source/WebCore/html/OffscreenCanvas.cpp
@@ -447,8 +447,10 @@ void OffscreenCanvas::commitToPlaceholderCanvas()
         return;
 
     // FIXME: Transfer texture over if we're using accelerated compositing
-    if (m_context && (m_context->isWebGL() || m_context->isAccelerated()))
+    if (m_context && (m_context->isWebGL() || m_context->isAccelerated())) {
+        m_context->prepareForDisplayWithPaint();
         m_context->paintRenderingResultsToCanvas();
+    }
 
     if (m_placeholderData->bufferPipeSource) {
         if (auto bufferCopy = imageBuffer->clone())