commit f3f9e0f211c9c179f9f240eafd4bfcbfc903c3d4 Author: George Wright george@mozilla.com Date: Fri Jun 6 14:26:21 2014 -0400

Bug 913805 - Hold a lock on the RasterImage in ScaleRequest so that the srcFrame doesn't go away if we need to discard images to free up memory. r=seth, a=abillings --- image/src/RasterImage.cpp | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/image/src/RasterImage.cpp b/image/src/RasterImage.cpp index 42d4232..fdd9654 100644 --- a/image/src/RasterImage.cpp +++ b/image/src/RasterImage.cpp @@ -208,6 +208,9 @@ public:

bool success = false; if (!dstLocked) { + // We need to hold a lock onto the RasterImage object itself so that + // it (and its associated imgFrames) aren't marked as discardable. + bool imgLocked = NS_SUCCEEDED(image->LockImage()); bool srcLocked = NS_SUCCEEDED(srcFrame->LockImageData()); dstLocked = NS_SUCCEEDED(dstFrame->LockImageData());

@@ -216,7 +219,7 @@ public: success = srcLocked && NS_SUCCEEDED(srcFrame->GetSurface(getter_AddRefs(srcASurf))); success = success && dstLocked && NS_SUCCEEDED(dstFrame->GetSurface(getter_AddRefs(dstASurf)));

- success = success && srcLocked && dstLocked && srcASurf && dstASurf; + success = success && imgLocked && srcLocked && dstLocked && srcASurf && dstASurf;

if (success) { srcSurface = srcASurf->GetAsImageSurface(); @@ -254,6 +257,7 @@ public: bool success = false; if (dstLocked) { success = NS_SUCCEEDED(dstFrame->UnlockImageData()); + success = success && NS_SUCCEEDED(image->UnlockImage());

dstLocked = false; srcData = nullptr;