A Swift wrapper around cogl that is largely auto-generated from gobject-introspection. For up to date (auto-generated) reference documentation, see https://rhx.github.io/SwiftCogl/
Version 15 of gir2swift provides a Package Manager Plugin. This requires Swift 5.6 or higher. (older versions can be used via the swift52 branch).
To build, download Swift from https://swift.org/download/ -- if you are using macOS, make sure you have the command line tools installed as well). Test that your compiler works using swift --version
, which should give you something like
$ swift --version
swift-driver version: 1.45.2 Apple Swift version 5.6 (swiftlang-5.6.0.323.62 clang-1316.0.20.8)
Target: x86_64-apple-darwin20.3.0
on macOS, or on Linux you should get something like:
$ swift --version
Swift version 5.6.1 (swift-5.6.1-RELEASE)
Target: x86_64-unknown-linux-gnu
These Swift wrappers have been tested with cogl-1.22 as well as glib-2.56, 2.58, 2.60, 2.62, 2.64, 2.66, 2.68, 2.70, and 2.72. They should work with higher versions, but YMMV. Also make sure you have gobject-introspection
and its .gir
files installed.
On Ubuntu 20.04 and 22.04 you can use the glib that comes with the distribution. Just install with the apt
package manager:
sudo apt update
sudo apt install libcogl-dev libgdk-pixbuf2.0-dev gir1.2-gdkpixbuf-2.0 gobject-introspection libgirepository1.0-dev libxml2-dev jq
On Ubuntu 18.04, the name of the packages are slightly different. Install the following with the apt
package manager:
sudo apt update
sudo apt install libCogl2-dev libCogl-gobject2 libgdk-pixbuf2.0-dev gobject-introspection libgirepository1.0-dev libxml2-dev jq
On Fedora 29, you can use the gtk that comes with the distribution. Just install with the dnf
package manager:
sudo dnf install cogl-devel gdk-pixbuf2-devel glib2-devel gobject-introspection-devel libxml2-devel jq
On macOS, you can install glib and Cogl using HomeBrew (for setup instructions, see http://brew.sh). Once you have a running HomeBrew installation, you can use it to install a native version of Cogl:
brew update
brew install gdk-pixbuf cogl glib glib-networking gobject-introspection pkg-config jq
Normally, you don't build this package directly (but for testing you can - see 'Building' below). Instead you need to embed SwiftCogl into your own project using the Swift Package Manager. After installing the prerequisites (see 'Prerequisites' below), add SwiftCogl
as a dependency to your Package.swift
file, e.g.:
// swift-tools-version:5.6
import PackageDescription
let package = Package(name: "MyPackage",
dependencies: [
.package(url: "https://github.com/rhx/gir2swift.git", branch: "main"),
.package(url: "https://github.com/rhx/SwiftCogl.git", branch: "main"),
],
targets: [
.target(name: "MyPackage",
dependencies: [
.product(name: "Cogl", package: "SwiftCogl")
]
)
]
)
Normally, you don't build this package directly, but you embed it into your own project (see 'Usage' above). However, you can build and test this module separately to ensure that everything works. Make sure you have all the prerequisites installed (see above). After that, you can simply clone this repository and build the command line executable (be patient, this will download all the required dependencies and take a while to compile) using
git clone https://github.com/rhx/SwiftCogl.git
cd SwiftCogl
swift build
swift test
On macOS, you can build the project using Xcode instead. To do this, you need to create an Xcode project first, then open the project in the Xcode IDE:
./xcodegen.sh
open Cogl.xcodeproj
After that, use the (usual) Build and Test buttons to build/test this package.
You can generate documentation using the DocC plugin. To preview documentation matching your local installation, simply run
swift package --disable-sandbox preview-documentation
then navigate to the URL shown for the local preview server. Make sure you have JavaScript enabled in your browser.
Alternatively, you can create static documentation using jazzy. Make sure you have sourcekitten and jazzy installed, e.g. on macOS (x86_64):
brew install ruby sourcekitten
/usr/local/opt/ruby/bin/gem install jazzy
./generate-jazzy.sh
Here are some common errors you might encounter and how to fix them.
If you get an error such as
Girs located at
Cannot open '/GLib-2.0.gir': No such file or directory
Make sure that you have the relevant gobject-introspection
packages installed (as per the Pre-requisites section), including their .gir
and .pc
files.
If, when you run swift build
, you get a Segmentation fault (core dumped)
or circular dependency error such as
warning: circular dependency detected while parsing pangocairo: harfbuzz -> freetype2 -> harfbuzz
this probably means that your Swift toolchain is too old, particularly on Linux. Make sure the latest toolchain is the one that is found when you run the Swift compiler (see above).
If you get an older version, make sure that the right version of the swift compiler is found first in your PATH
. On macOS, use xcode-select to select and install the latest version, e.g.:
sudo xcode-select -s /Applications/Xcode.app
xcode-select --install
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