On 03/14/2012 03:26 PM, Robert O'Callahan wrote:
On Wed, Mar 14, 2012 at 9:02 PM, Julian Viereck<
[email protected]> wrote:
the PDF.JS team is dealing with printing support on the web. I looked at
what's currently possible with the browser and shared some thoughts about
it here:
https://gist.github.com/1953505#file_gistfile1.md
There are some comments on this G+ post:
https://plus.google.com/u/0/115228539776721208421/posts/LbVDmfALeey
Based on that feedback, I've started on a new WebPrint API proposal, that
you can find here:
https://wiki.mozilla.org/WebAPI/WebPrintAPI
There isn't too much yet. So far I have scratched out the basic API and
started some very basic implementation work. However, I hope this is enough
to get some discussion about this proposed API going and I'd like to get
some feedback what people think about it.
We need to implement the CSS3 stuff anyway. How about:
-- Implement CSS3 Paged Media sufficient to make headers/footers and
margins go away, select page orientation and size. That shouldn't be too
hard.
-- Add an event to canvas that fires per-page during printing to render
that canvas content while we're printing the page it's on. This event would
provide a special canvas context that's compatible with the 2d interface
but internally renders at higher resolution (or possibly emits PS/PDF
directly).
Then you could create a print document that's just a series of canvases,
with the appropriate CSS to remove headers/footers/margins etc, and as we
print each page we'll run the callback on each canvas to paint it more
accurately. Any temporary resources could be thrown away after painting
that page.
That's clever, I like it.
zw
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