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

[Harlan Haskins]

I considered that but couldn't find a cairo_get_font_scale function quickly to complement the setter 😅

But yes, a full wrapper would transparently handle getting and setting.

- Harlan

> On Dec 11, 2015, at 7:28 PM, Jack Lawrence <jackl at apple.com> wrote:
> 
> For getter-setter pairs like `setLineWidth`, you might consider turning them into properties:
> 
> cairo.setLineWidth(0.1) // old
> cairo.lineWidth = 0.1 // new
> 
>> On Dec 11, 2015, at 4:22 PM, Gage Morgan via swift-users <swift-users at swift.org> wrote:
>> 
>> 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. 
>> 
>> Sent from Outlook Mobile
>> 
>> 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. 
>> 
>> Sent from Outlook Mobile
>> 
>> 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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>> 
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