Bug 1683217 - Require non-zero window size for profiler screenshots in WebRender r=mstange

Differential Revision: https://phabricator.services.mozilla.com/D101685

gfx/webrender_bindings/RendererOGL.cpp

@@ -206,8 +206,10 @@ RenderedFrameId RendererOGL::UpdateAndRender(
     }
   }
 
-  if (!mCompositor->MaybeGrabScreenshot(size.ToUnknownSize())) {
-    mScreenshotGrabber.MaybeGrabScreenshot(this, size.ToUnknownSize());
+  if (size.Width() != 0 && size.Height() != 0) {
+    if (!mCompositor->MaybeGrabScreenshot(size.ToUnknownSize())) {
+      mScreenshotGrabber.MaybeGrabScreenshot(this, size.ToUnknownSize());
+    }
   }
 
   RenderedFrameId frameId = mCompositor->EndFrame(dirtyRects);

gfx/wr/webrender/src/screen_capture.rs

@@ -115,6 +115,9 @@ impl AsyncScreenshotGrabber {
     ) -> (AsyncScreenshotHandle, DeviceIntSize) {
         let screenshot_size = match self.mode {
             AsyncScreenshotGrabberMode::ProfilerScreenshots => {
+                assert_ne!(window_rect.size.width, 0);
+                assert_ne!(window_rect.size.height, 0);
+
                 let scale = (buffer_size.width as f32 / window_rect.size.width as f32)
                     .min(buffer_size.height as f32 / window_rect.size.height as f32);