[whatwg] Blurry lines in 2D Canvas (and SVG)
Ruben Rodriguez II
whatwg at therealcha0s.net
Fri Sep 27 14:13:19 PDT 2013
It seems like those should be two separate things instead of lumped all
together in a monolithic "You can do this if you want... or whatever!"
"Snapping" is definitely something different than antialiasing. It's a
huge pain for anyone trying to provide a(n accurate) simple 2D primitive
On 07/23/2013 08:16 PM, Rik Cabanier wrote:
> I guess there's too many "might"s in there :-)
> I want to "adjust line positions and line widths to align edges with device
> pixels" but not "the user agent might turn off anti-aliasing for all lines
> and curves"
> On Tue, Jul 23, 2013 at 6:11 PM, Brian Birtles <bbirtles at mozilla.com> wrote:
>> (2013/07/24 10:07), Rik Cabanier wrote:
>>> yeah, at first blush that seemed what was needed.
>>> However, this simply turns off antialiasing completely so regular
>>> artwork looks terrible.
>> That's a quality of implementation issue. The description of the property
>> value says,
>> "Indicates that the user agent shall attempt to emphasize the contrast
>> between clean edges of artwork over rendering speed and geometric
>> precision. To achieve crisp edges, the user agent might turn off
>> anti-aliasing for all lines and curves or possibly just for straight lines
>> which are close to vertical or horizontal. Also, the user agent might
>> adjust line positions and line widths to align edges with device pixels."
>> I'm not sure what use case you have in mind though. Perhaps it's something
>> that doesn't fit that description?
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