- From: Robert O'Callahan <robert@ocallahan.org>
- Date: Thu, 14 Feb 2013 16:27:32 +1300
- To: Rik Cabanier <cabanier@gmail.com>
- Cc: whatwg@whatwg.org, Ian Hickson <ian@hixie.ch>, Stephen White <senorblanco@chromium.org>
On Thu, Feb 14, 2013 at 4:18 PM, Rik Cabanier <cabanier@gmail.com> wrote: > On Thu, Feb 14, 2013 at 2:12 PM, Robert O'Callahan <robert@ocallahan.org>wrote: > >> On Thu, Feb 14, 2013 at 3:55 PM, Rik Cabanier <cabanier@gmail.com> wrote: >> >>> What would happen if you set 'opaque' to true and you draw with alpha and >>> 'copy' compositing? It seems that that has the same issue (unless you're >>> OK >>> with breaking drawing). >>> >> >> The alpha values of all moz-opaque canvas pixels are simply not affected >> by compositing. >> > > Exactly! So, this will break drawing as the pixels with no alpha will be > black with no way to undo that. > I don't know what you mean by "no way to undo that" or "break drawing". Rob -- 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]
Received on Thursday, 14 February 2013 03:27:57 UTC