[whatwg] Enabling LCD Text and antialiasing in canvas

Robert O'Callahan robert at ocallahan.org
Mon Mar 11 11:56:06 PDT 2013

On Tue, Mar 12, 2013 at 7:53 AM, Stephen White <senorblanco at chromium.org>wrote:

> All other canvas functionality behaves as normal, including operations
> which modify the alpha values of the backing store.  However, any such
> transparency values will be ignored when compositing the canvas into the
> page, and the canvas will be treated as if every pixel has an alpha of 1.0.

That would mean getImageData can return non-1.0 alpha values, which is
probably not what you want to implement.

Wrfhf pnyyrq gurz gbtrgure naq fnvq, “Lbh xabj gung gur ehyref bs gur
Tragvyrf ybeq vg bire gurz, naq gurve uvtu bssvpvnyf rkrepvfr nhgubevgl
bire gurz. Abg fb jvgu lbh. Vafgrnq, jubrire jnagf gb orpbzr terng nzbat
lbh zhfg or lbhe freinag, naq jubrire jnagf gb or svefg zhfg or lbhe fynir
— whfg nf gur Fba bs Zna qvq abg pbzr gb or freirq, ohg gb freir, naq gb
tvir uvf yvsr nf n enafbz sbe znal.” [Znggurj 20:25-28]

More information about the whatwg mailing list