[swift-users] Need Help with C-to-Swift (finally)

[Gage Morgan]

Harlan,
The answer is yes. I even managed to get a couple you didn't list on my own:
let cairo = Cairo(format: CAIRO_FORMAT_ARGB32, width: 421, height: 410)cairo.scale(10.0, y: 10.0)cairo.moveTo(29.0, y: 14.7)cairo.lineTo(37.6, y: 13.0)cairo.moveTo(37.6, y: 13.0)cairo.lineTo(30.4, y: 22.2)cairo.moveTo(30.4, y: 22.2)cairo.lineTo(29.0, y: 14.7)cairo.setLineWidth(0.1)cairo.stroke()cairo.surfaceWriteToPNG("boobs.png")
Swift is both really neat and really frustrating when learning it. 
Subject: Re: [swift-users] Need Help with C-to-Swift (finally)
From: harlan at harlanhaskins.com
Date: Fri, 11 Dec 2015 17:21:38 -0500
CC: kwame.bryan at gmail.com; swift-users at swift.org
To: gagemorgan at outlook.com

Gage,
Sorry, I just got back from class.
I’ll respond in line!
On Dec 11, 2015, at 5:09 PM, Gage Morgan <gagemorgan at outlook.com> wrote:




Harlan,



I read on 
cairographics.org about bindings awhile back. I think they want cairo, not surface, so we would have something like:



let cairo = Surface(format: CAIRO_FORMAT_ARGB32, width: 240, height: 80)
cairo.setFontFace("serif", weight: CAIRO_FONT_WEIGHT_BOLD)
cairo.setFontSize(32.0)
cairo.setSourceRGB(0.0, g: 0.0, b: 1.0)
cairo.moveTo(x: 10, y: 50)
cairo.showText("Hello, World!")
cairo.writeToPNG("hello.png")



Would this work the same as before without "surface" but instead "cairo”?

Absolutely! That’s just a variable name — it could be called ‘puppies’, though that’s not very readable.



Sent from Outlook Mobile









On Fri, Dec 11, 2015 at 2:00 PM -0800, "Gage Morgan via swift-users"
<swift-users at swift.org> wrote:





I went and looked at it, and even now it looks like I want to take every function I've used in Cairo and translate it to Swift. Swift is such a...simple language compared to everything else. That being said, as a result of the specs, it is also much more
 verbose in terms of writing the code. Compared to other languages, it is written out instead of shoved onto a few lines. 



Is there a way to import modules into other modules? Because it looks like a weekend project that will eventually get posted by myself at http://github.com/Christoffen-Corporation. 



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I’d recommend having a look at the Swift package manager example again — https://github.com/apple/swift-package-manager/blob/master/Documentation/SystemModules.md
There’s an example of using those modules together.



On Fri, Dec 11, 2015 at 1:52 PM -0800, "Gage Morgan via swift-users"
<swift-users at swift.org> wrote:





I meant the code posted in the Gist link above. I don't know jack squat about qsort. I'm hoping that if I can reverse-engineer code already produced, I can apply it to other parts of Cairo. 



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I’ll go ahead and comment it, but I think it’s simplistic enough that it should be readable with a grasp of some Swift concepts. Perhaps it’s a good idea to look through The Swift Programming Language to figure out some of the constructs I used — they’re fairly basic constructs.



On Fri, Dec 11, 2015 at 1:34 PM -0800, "Kwame Bryan"
<kwame.bryan at gmail.com> wrote:




Tutorial on the subject. http://chris.eidhof.nl/posts/swift-c-interop.html 



Regards
Kwame







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