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Bug 959842. Add null checks whenever we borrow a draw target from RotatedBuffer. r=kats

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This commit is contained in:
Nicholas Cameron
2014-01-17 09:52:52 +13:00
parent b83d2e0dfb
commit 3d45616f9d
1 changed files with 9 additions and 0 deletions
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9
gfx/layers/client/ContentClient.cpp
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@@ -630,6 +630,9 @@ ContentClientDoubleBuffered::UpdateDestinationFrom(const RotatedBuffer& aSource,
{
DrawTarget* destDT =
BorrowDrawTargetForQuadrantUpdate(aUpdateRegion.GetBounds(), BUFFER_BLACK);
if (!destDT) {
return;
}
bool isClippingCheap = IsClippingCheap(destDT, aUpdateRegion);
if (isClippingCheap) {
@@ -646,6 +649,9 @@ ContentClientDoubleBuffered::UpdateDestinationFrom(const RotatedBuffer& aSource,
MOZ_ASSERT(HaveBufferOnWhite());
DrawTarget* destDT =
BorrowDrawTargetForQuadrantUpdate(aUpdateRegion.GetBounds(), BUFFER_WHITE);
if (!destDT) {
return;
}
bool isClippingCheap = IsClippingCheap(destDT, aUpdateRegion);
if (isClippingCheap) {
@@ -882,6 +888,9 @@ DeprecatedContentClientDoubleBuffered::UpdateDestinationFrom(const RotatedBuffer
MOZ_ASSERT(HaveBufferOnWhite());
DrawTarget* destDT =
BorrowDrawTargetForQuadrantUpdate(aUpdateRegion.GetBounds(), BUFFER_WHITE);
if (!destDT) {
return;
}
bool isClippingCheap = IsClippingCheap(destDT, aUpdateRegion);
if (isClippingCheap) {