[whatwg] Enabling LCD Text and antialiasing in canvas
callow.mark at artspark.co.jp
Wed Apr 3 22:02:14 PDT 2013
On 2013/04/04 13:50, Rik Cabanier wrote:
> On Wed, Apr 3, 2013 at 9:25 PM, Mark Callow
> <callow.mark at artspark.co.jp <mailto:callow.mark at artspark.co.jp>> wrote:
> As screen pixel densities soar, it is increasingly the case that
> fonts are stored simply as paths that are scaled, especially fonts
> which have thousands of characters.
> No, that is not true.
> Talk to font vendors; fonts are not just a collection of path
> segments. They are also not rendered as paths; instead they should
> have specific renderers.
The people who work on our HiGlyph library tell me it is changing. I
have no references I can provide.
> Vertical and horizontal lines won't have any aliasing to begin
> with so what are you talking about?
> Of course they have aliasing. Why wouldn't they?
Because they are vertical and horizontal, therefore no jaggies (aliasing).
>> Text also has the nice property that it's filled with a solid color.
> I know little about Canvas2D but I do know that PostScript and SVG
> both support gradients etc. when filling text so your statement is
> I worked on the rendering engine of Illustrator and Acrobat for 11
> years. Subpixel AA is disabled for text that is filled with gradients
> or images and reverts to normal rendering. AFAIK there is no
> postscript implementation that supports subpixel positioning.
> Can you point me to a spec where you can fill text in canvas with a
> gradient instead of a solid color?
As I wrote, I don't know much about Canvas2D. Besides it wasn't clear
that your comment referred only to Canvas2D.
NOTE: This electronic mail message may contain confidential and
privileged information from HI Corporation. If you are not the intended
recipient, any disclosure, photocopying, distribution or use of the
contents of the received information is prohibited. If you have received
this e-mail in error, please notify the sender immediately and
permanently delete this message and all related copies.
More information about the whatwg