Bug 43815
| Summary: | Heavy use of shadow blur in canvas is slow | ||
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| Product: | WebKit | Reporter: | Michael Dewey <mike> |
| Component: | Layout and Rendering | Assignee: | Nobody <webkit-unassigned> |
| Status: | NEW | ||
| Severity: | Normal | CC: | hyatt, igor.oliveira, mdelaney7, simon.fraser |
| Priority: | P2 | ||
| Version: | 528+ (Nightly build) | ||
| Hardware: | Mac (Intel) | ||
| OS: | OS X 10.5 | ||
| URL: | http://muro.deviantart.com | ||
Michael Dewey
Webkit's implementation of <canvas> has some issues when it tries to do a lot of drawing with high shadow blur. In every other area of <canvas> rendering webkit is much faster than gecko browsers, but in this case it grinds to a crawl where gecko browsers render at about the same speed.
In the referenced web page, the "basic" brush and "paintbrush" use shadows to draw soft lines. I had to make it so the maximum softness on webkit browsers is only 20% of what maximum softness is on gecko browsers because it was otherwise unusable.
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