зеркало из https://github.com/mozilla/gecko-dev.git
Bug 801676 - Follow-up: Add comment explaining why we use JPEG instead of PNG in getScreenshot(). r=jlebar DONTBUILD
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@ -462,6 +462,9 @@ BrowserElementChild.prototype = {
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content.innerHeight, "rgb(255,255,255)");
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sendAsyncMsg('got-screenshot', {
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id: data.json.id,
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// Hack around the fact that we can't specify opaque PNG, this requires
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// us to unpremultiply the alpha channel which is expensive on ARM
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// processors because they lack a hardware integer division instruction.
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rv: canvas.toDataURL("image/jpeg")
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});
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},
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