Comment 0 for bug 180890
Revision history for this message
| MenTaLguY (mental-deactivatedaccount) wrote work around deficiencies of feBlend-based blend modes | #0 |
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Since we cannot make blend modes work correctly over transparent backgrounds within the confines of SVG, we will need a good workaround. The problems are, unfortunately, extremely user-visible.
The best idea I've been able to come up with so far is to add an opaque rectangle as a child of the root <svg> element, underneath the bottom-most layer. The rectangle should be:
- opaque
- have its fill synchronized with the document background color
- have its dimensions synchronized with the document dimensions
The rectangle would be added the first time that blend mode is engaged for a layer in the document, and ideally removed when no layers any longer have a special blending mode. Export transparency should also be disabled when blend modes are in use.