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

[Harlan Haskins]

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 <http://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 <https://aka.ms/qtex0l>
> 
> 
> 
> On Fri, Dec 11, 2015 at 2:00 PM -0800, "Gage Morgan via swift-users" <swift-users at swift.org <mailto: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 <https://aka.ms/qtex0l>
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 <mailto: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 <https://aka.ms/qtex0l>
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 <mailto:kwame.bryan at gmail.com>> wrote:
> 
> Tutorial on the subject. http://chris.eidhof.nl/posts/swift-c-interop.html <http://chris.eidhof.nl/posts/swift-c-interop.html> 
> 
> Regards
> Kwame
> 
> 
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