Comment 3 for bug 180890
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| MenTaLguY (mental-deactivatedaccount) wrote Re: work around deficiencies of feBlend-based blend modes | #3 |
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73416ba
(Get the code!)
No. The SVG rendering model for background accumulation buffers (used for filter input) starts with a transparent buffer and provides no way to paint anything into that buffer before objects are rendered into it. It never includes the page color. The only way to pre-paint opaque pixels to the buffer before objects are rendered into it is to give them an opaque sibling at the very bottom (i.e. something like a "backstop rectangle").
Besides a rect, another option might be an empty group with an feFlood filter applied with the filter effect area being the document dimensions.