Canvas 2.0 🚀

[LinusU]

I would like to start bringing up the discussion on the next major bump. This is a quick list on the top of my head on what I personally would like to get in.

• Remove sync streams
• Drop support for Node 0.8 (Implement Readable instead of Stream #740)
• Require pango (Require Pango over "toy" Cairo font methods. Redo the custom font API #715)

Would love to get some comments from both maintainers and users of the module 🙌

[jakeg]

Sounds great! Especially pango.

Does anyone with necessary know-how know if getting svg import (not export!) #494 . Would be possible? Happy to sponsor someone's time to work on this. In fact generally is it possible to donate some money for your and other developers' time?

[zbjornson]

Awesome! I'd add:

• libjpeg-turbo for windows #458 if it doesn't get merged sooner than 2.0

Re: remove sync streams, any use in adding a sync API? (e.g. let pngBuffer = canvas.toPng();)

[LinusU]

That's right, I forgot about that one 👍

I think we already have sync api? canvas.toBuffer('png')

[jakeg]

Would love to see CMYK JPG import support too #425, or at least an exception thrown if trying to add one to a canvas.

[piranna]

I would like to have static build so there's no dependencies on libraries installed on the system, this will fix a lot of install issues. Also I would like to have configurable backend support, so node-canvas could be used to draw on the Linux framebuffer and other on-screen outputs. I have support for both of them on my pull-request.

[chearon]

I would like to have static build so there's no dependencies on libraries installed on the system, this will fix a lot of install issues

node-pre-gyp seems to be the new way do do that. Canvas could move to that and there wouldn't have to be compilation on the client. I think people would still have to have Cairo and stuff though and of course Windows is still a nightmare.

Downsides are that it adds another step for publishing, and it relies on S3 which has to be paid for

[piranna]

node-pre-gyp is a partial fix, my pull-request fix it for all platforms
(including OSX and Windows) by allowing to use statically linked libraries,
no external dependencies on Cairo, and also makes prebuilds more portable.
On the other hand, prebuild-install is a simpler and more flexible
alternative to node-pre-gyp, and by default uses GitHub releases for
distribution, so there's no publishing problem here, too.
El 5/5/2016 6:37 PM, "Caleb Hearon" notifications@github.com escribió:

I would like to have static build so there's no dependencies on libraries
installed on the system, this will fix a lot of install issues

node-pre-gyp https://github.com/mapbox/node-pre-gyp seems to be the new
way do do that. Canvas could move to that and there wouldn't have to be
compilation on the client. I think people would still have to have Cairo
and stuff though and of course Windows is still a nightmare.

Downsides are that it adds another step for publishing, and it relies on
S3 which has to be paid for

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#743 (comment)

[piranna]

Another thing I would like to see is a "compliant mode", a way to have a Canvas object that only implements the W3C Canvas API without the node-canvas extras, so it would be easy to stick to it to be sure that a project will be compatible with both environments.

[piranna]

I have finally managed to update my pull-request with support for statically linked build and configurable graphic backend to nan2, with direct screen support for FBDev and X11 but it could be possible easily to add other backends. Could be able someone to review and merge it or give me some comments?

[zbjornson]

@LinusU what do you think of starting a 2.0 staging branch so these PRs can start landing? :)

At the moment I think that might just be pango (#715). I need to update #740, which is straightforward.

[adamhooper]

I'm of the opinion toBuffer() should give raw pixels, and toPNG() / toJPEG() should be the sync APIs. Or -- better yet -- encoding could move to other libraries. See #819

I started using node-canvas yesterday, so I'm an expert ;).

[guileen]

Any update on 2.0?

[piranna]

I'm splitting my pull-request on several smaller ones hopping they could be easily reviewed and merged. The first one I've done so far is for static building, that would also fix the build dependencies problems both on WIndows and OSX but also on Linux.

[chearon]

@LinusU is there anything we can do to help with this release? I've been keeping #715 conflict-free, and I know it's a ton to review but I will make myself available to answer questions, I'd really love to see #740 land soon too

[LinusU]

master is now for version 2.x 🙌 🚀

Let's start the merging!