text? about imagedraw.jl HOT 8 CLOSED

This feature does not exist in ImageDraw yet.

I am not familiar with Cairo, does this link(its a python example) help to convert a surface to the Image type?

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I would wager that Cairo is the way to go here. Convert to a surface, then write on it, and then extract the data again. I'm certain Cairo.jl could use some improvement/cleanup to make that easier. Cairo.jl was mostly written before we had the color types RGB24, ARGB32, Gray24, and AGray32, which could be leveraged to provide a much more Julian interface than "naked" UInt32 arrays. They've crept in a bit (I added some wrappers), but overall it's not exactly pretty.

I wonder if we want to make such capabilities part of ImageDraw, or whether there should be a separate ImageText package. If it were not for the issue of additional binary dependencies, I'd argue for putting it all in ImageDraw; but with the dependency problem, one could get into a situation where one couldn't use any of the features of the package simply because it couldn't be loaded. I don't know how problematic libcairo has been; I don't remember seeing a lot of bug reports about it.

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I wonder if we want to make such capabilities part of ImageDraw, or whether there should be a separate ImageText package. If it were not for the issue of additional binary dependencies, ...

For my very egoistic reasons I would vote to keep the dependencies of ImageDraw to a minimum. Egoistic because I would like a future version of UnicodePlots to use ImageDraw and ImageInTerminal to provide a lot of its functionality, and naturally I aim to keep UnicodePlots as compact as I can

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an alternative to Cairo is FreeType. @SimonDanisch has done most of what i need in the FreeTypeAbstraction module of GLVisualize. would it make sense to split that out into a separate package called ImageText?

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I'm actively working on some Julia/CPU only version of GLVisualize right now... This will bring most of this, I guess ;)
But will obviously take some time!

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@SimonDanisch can you please elaborate? all i need is to put text onto an image array. your FreeTypeAbstraction module is very close to doing that. but i don't need the rest of GLVisualize. are you saying you've already split it out into it's own package? if so, could you please share? if not, would you mind if i went ahead and did that? thanks.

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It actually was at some point: https://github.com/SimonDanisch/FreeTypeAbstraction.jl.
I might want to transfer that repo to JuliaGraphics first, though.
Feel free to update it with the current version in GLVisualize!

Well, you might still want a nice API, caching, fast resolution independent rendering, etc, which is what GLVisualize should offer at some point.
If you need it now and don't mind duplicating some work (for a simple version it should be very little duplication), go ahead and don't wait for GLVisualize! ;)

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i have a PR which enables one to render text into a matrix. so i'll close this issue, but would appreciate if everyone could provide feedback over there.

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