MediaStreamNote: Difference between revisions

MediaStreamNote (view source)

Revision as of 05:43, 29 July 2014

1,476 bytes added , 29 July 2014

→‎AudioNodeStream::ProcessInput

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@@ Line 488: / Line 488: @@
      }
    }
+}
+</source>
+==HTMLImageElement ==
+<source lang="cpp">
+nsLayoutUtils::SurfaceFromElementResult
+nsLayoutUtils::SurfaceFromElement(nsIImageLoadingContent* aElement,
+                                  uint32_t aSurfaceFlags,
+                                  DrawTarget* aTarget)
+{
+  SurfaceFromElementResult result;
+  nsresult rv;
+  nsCOMPtr<imgIRequest> imgRequest;
+  rv = aElement->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST,
+                            getter_AddRefs(imgRequest));
+  if (NS_FAILED(rv) || !imgRequest)
+    return result;
+  uint32_t status;
+  imgRequest->GetImageStatus(&status);
+  if ((status & imgIRequest::STATUS_LOAD_COMPLETE) == 0) {
+    // Spec says to use GetComplete, but that only works on
+    // nsIDOMHTMLImageElement, and we support all sorts of other stuff
+    // here.  Do this for now pending spec clarification.
+    result.mIsStillLoading = (status & imgIRequest::STATUS_ERROR) == 0;
+    return result;
+  }
+  ...
+  if (!noRasterize || imgContainer->GetType() == imgIContainer::TYPE_RASTER) {
+    if (aSurfaceFlags & SFE_WANT_IMAGE_SURFACE) {
+      frameFlags |= imgIContainer::FLAG_WANT_DATA_SURFACE;
+    }
+    result.mSourceSurface = imgContainer->GetFrame(whichFrame, frameFlags);
+    if (!result.mSourceSurface) {
+      return result;
+    }
+  ...
+  } else {
+    result.mDrawInfo.mImgContainer = imgContainer;
+    result.mDrawInfo.mWhichFrame = whichFrame;
+    result.mDrawInfo.mDrawingFlags = frameFlags;
+  }
+  ...
+  return result;
 }
 </source>