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-rw-r--r--dom/canvas/CanvasRenderingContext2D.cpp17
1 files changed, 13 insertions, 4 deletions
diff --git a/dom/canvas/CanvasRenderingContext2D.cpp b/dom/canvas/CanvasRenderingContext2D.cpp
index b60ab239d..a750c69b0 100644
--- a/dom/canvas/CanvasRenderingContext2D.cpp
+++ b/dom/canvas/CanvasRenderingContext2D.cpp
@@ -1105,6 +1105,7 @@ CanvasRenderingContext2D::CanvasRenderingContext2D(layers::LayersBackend aCompos
, mIsCapturedFrameInvalid(false)
, mPathTransformWillUpdate(false)
, mInvalidateCount(0)
+ , mWriteOnly(false) // == !origin-clean
{
sNumLivingContexts++;
@@ -2562,7 +2563,8 @@ CanvasRenderingContext2D::CreatePattern(const CanvasImageSource& aSource,
// nullptr and set CORSUsed to true for passing the security check in
// CanvasUtils::DoDrawImageSecurityCheck().
RefPtr<CanvasPattern> pat =
- new CanvasPattern(this, srcSurf, repeatMode, nullptr, false, true);
+ new CanvasPattern(this, srcSurf, repeatMode, nullptr,
+ imgBitmap.IsWriteOnly(), true);
return pat.forget();
}
@@ -4952,6 +4954,10 @@ CanvasRenderingContext2D::DrawImage(const CanvasImageSource& aImage,
aError.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
+
+ if (canvas->IsWriteOnly()) {
+ SetWriteOnly();
+ }
} else if (aImage.IsImageBitmap()) {
ImageBitmap& imageBitmap = aImage.GetAsImageBitmap();
srcSurf = imageBitmap.PrepareForDrawTarget(mTarget);
@@ -4960,6 +4966,10 @@ CanvasRenderingContext2D::DrawImage(const CanvasImageSource& aImage,
return;
}
+ if (imageBitmap.IsWriteOnly()) {
+ SetWriteOnly();
+ }
+
imgSize = gfx::IntSize(imageBitmap.Width(), imageBitmap.Height());
}
else {
@@ -5674,9 +5684,8 @@ CanvasRenderingContext2D::GetImageData(JSContext* aCx, double aSx,
// Check only if we have a canvas element; if we were created with a docshell,
// then it's special internal use.
- if (mCanvasElement && mCanvasElement->IsWriteOnly() &&
- !nsContentUtils::IsCallerChrome())
- {
+ if (IsWriteOnly() ||
+ (mCanvasElement && mCanvasElement->IsWriteOnly() && !nsContentUtils::IsCallerChrome())) {
// XXX ERRMSG we need to report an error to developers here! (bug 329026)
aError.Throw(NS_ERROR_DOM_SECURITY_ERR);
return nullptr;