computeBackgroundIsKnownToBeObscured 637 Source/core/rendering/RenderBox.h virtual bool computeBackgroundIsKnownToBeObscured() OVERRIDE; computeBackgroundIsKnownToBeObscured 96 Source/core/rendering/RenderImage.h virtual bool computeBackgroundIsKnownToBeObscured() OVERRIDE FINAL; computeBackgroundIsKnownToBeObscured 660 Source/core/rendering/RenderObject.h virtual bool computeBackgroundIsKnownToBeObscured() { return false; } computeBackgroundIsKnownToBeObscured 1400 Source/core/rendering/RenderObject.h BoxDecorationState boxDecorationState = computeBackgroundIsKnownToBeObscured() ? HasBoxDecorationsAndBackgroundIsKnownToBeObscured : HasBoxDecorationsAndBackgroundMayBeVisible;