Lines Matching full:mask
670 // Figure out if we need to push a transparency layer to render our mask.
681 // Don't render a masked element until all the mask images have loaded, to prevent a flash of unmasked content.
688 // Before all images have loaded, just use an empty transparency layer as the mask.
693 // We have a mask-box-image and mask-image, so need to composite them together before using the result as a mask.
696 // We have to use an extra image buffer to hold the mask. Multiple mask images need
697 // to composite together using source-over so that they can then combine into a single unified mask that
700 // and composite that buffer as the mask.
701 // We have to check that the mask images to be rendered contain at least one image that can be actually used in rendering
