64074 - vector to raster conversion (SVG)

Status: RESOLVED INCOMPLETE

(Core Graveyard :: GFX, enhancement, P5)

Description

[rvj]

I would like to be able to use SVG for image editing but be able to generate a 
bitmap image if appropriate (GIF, PNG, JPG, etc).

Any chance of a very simple API for vector to raster conversion?

API would require

a) output filename/directory
b) output image format (PNG, JPG, GIF, etc)
c) image size in pixels (200x300)
d) color depth in pixels (8/16/24/etc)


Or is there a way of doing this already?

Comment 1

[Hixie (not reading bugmail)]

This is a _Mozilla_ bug?!

Comment 2

[Håkan Waara]

Heh. Certainly not - this Bugzilla only handles bugs and feature requests for
Mozilla. SVG is a standard and product of Adobe if I recall correctly. Marking
INVALID.

Comment 3

[James Green]

We are not Adobe Photoshop. We do have some sort of cvs tree for SVG stuff,
quite what the state/purpose of it is I do not know. However saving from SVG to
raster formats is not the job of a web browser. Use the right tool for the right
job :).

Unless, of course, we've all gotten the wrong end of the stick with your bug
report...

Verified Invalid.

Comment 4

[rvj]

I'm surprised by some of the follow up comments - particularly that the idea 
that Mozilla is just a browser. I doubt if most of the XPFE group see it in 
those terms.

Chatzilla, Composer, etc all provide editing functionality. I believe someone 
has already built a editor based around SVG. 

What is required a VERY BASIC method of dumping a bitmap representation of the 
screen (just as you could/can with VB - the Printform method if I remember 
correctly). We are not talking Photoshop here!!!!

If on the otherhand you are saying that SVG is no longer Mozilla's choice of 
vector drawing tool - then what is?? 

Comment 5

[rvj]

PS I have temporarily reopened this RFE as I suspect once marked as INVALID,  
follow up comments/queries dont get seen/responded to. !

Comment 6

[Stephan Niemz]

Marking new to aid discussion.

Comment 7

[rvj]

PS It may be that SVG is not the main issue here (functionality wise) but a 
general need for a window handle that allows a selected bit of the window area 
to be saved (like Printform). 

I will attempt to explore use of scripted cut and paste , together with  save 
as file (GIF, PNG, etc) functions

Comment 8

[rubydoo123]

moving to future

Comment 9

[Stephan Niemz]

back to SVG component

Comment 10

[Adam D. Moss]

Come on, this *is* INVALID, right?

Comment 11

[rvj]

Really invalid ?

Well I can only say that some kind of 'Save as .. ' gif or png feature is 
needed.

If such functionality already exists great - then  please let me know. 

Mozila has the beginnings of a page editor but say you want to include a screen 
shot of the contents of an iframe. I am not aware of any Mozilla functionality 
that allows this. 

Seems that the most general solution is to have a 'Save as ' function for the 
contents of an iframe (which could be  HTML, XML, SVG content).

Unlike some follow up comments relating to professional imaging packages - I am 
looking for something very simple - the ability to take iframe screenshots 
(using javascript) 

Comment 12

[rvj]

PS ..... or could the printing component be used to achieve this. ie. Print the 
contents of an iframe to a file ( in gif or png) format ?

Does the print component have the ability to save in a particluar graphics 
format?

Comment 13

[rvj]

A more appropriate title might be "Capturing iframe content as raster"

As Ive said before Im quite happy have this RFE closed but before it is can 
anyone clarify which Mozilla APIs allow the contents of Mozilla iframes (htm, 
svg, xml, etc) to captured and saved.?

Can (or is) the print component the most likely component that would provide a 
method of saving iframe content in raster  format  (e.g. PNG)?

If not, can anyone suggest which component category this RFE should be filed.?

Comment 14

[Bradley Baetz (:bbaetz)]

Theres a debug-only api which saves to a ppm. Its useful for debugging purposes,
so this is possible, in theory. Batik allows you to do this.

Comment 15

[Roland Mainz]

What about implementing this via the printing API ?

Comment 16

[rvj]

FYI 

I filed a request for such an enhancement to the printer API

to allow this which I believe you triaged. Bug 113231. 

Since bug 113231 now appears to have been adopted (it has assigned status) this 
enhancement request (64074) can be closed.

I only left it open for some feedback.

Comment 17

[Alan]

The now defunct Eazel wrote a library for rasterising SVG as part of Nautilus
librsvg.  
quite a few open source projects use it.  It is licensed under the LGPL.  it is
in Gnome CVS
http://cvs.gnome.org/lxr/source/librsvg/

Google produces quite a few links, but Librsvg does not seem to have a homepage
of its own or anything like that.   
http://www.google.com/search?q=librsvg&sourceid=mozilla-search&start=0&start=0

Comment 18

[Alex Fritze]

I can see this being useful, but SVG is most certainly not the right component
to implement this functionality in. You'd want to be able to do this for any xml
content, so the best way to attack this would probably be on the
nsRenderingContext level.
GFX seems a more appropriate component -> reassigning.

Comment 19

[Eli Friedman]

If you're JS in chrome, you can just load the SVG into an iframe, use drawWindow on a canvas, and then use toDataURI to get out a PNG.  Is there anything else needed here?

Comment 20

[Zack Weinberg (:zwol)]

Yeah, Canvas seems to provide the desired functionality to the extent that it can without security issues.

Comment 21

[Mardeg]

(In reply to Eli Friedman from comment #19)
> If you're JS in chrome, you can just load the SVG into an iframe, use
> drawWindow on a canvas, and then use toDataURI to get out a PNG.  Is there
> anything else needed here?

A way to convert SMIL animation to animated PNG.

Comment 22

[Matthew N. [:MattN]]

IE10 allows a user to "Save Picture as…" on an SVG document and save it as a PNG or BMP.

Comment 23

[Jonathan Watt [:jwatt]]

Mass bug change to replace various 'parity' whiteboard flags with the new canonical keywords. (See bug 1443764 comment 13.)