164afdcc59
When recording the display list for a stacking context, the following operations (relevant to this bug) happened: * push a stacking context * as part of that push a None-value to the scroll frame id stack * apply filters * apply masking * paint recursively This meant that mask-images were always recorded without scroll frame id, causing them to be painted without any scroll offset. As a result mask-images would break as soon as the website using them was scrolled. Instead, push to the scroll frame id stack later to solve the problem: * push a stacking context * apply filters * apply masking * push a None-value to the scroll frame id stack * paint recursively |
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