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DEVELOPMENT.md

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Building JVM bindings

  • Prepare the system

    • macOs Install Xcode Command Line Tools
    • Linux Install these tools: 
      sudo apt-get install ninja-build fontconfig libfontconfig1-dev libglu1-mesa-dev libxrandr-dev libdbus-1-dev zip libx11-dev
    • Windows
      1. Download Visual Studio Build Tools 2019 (search "BuildTools" on the page).
      2. During the installation, select "Desktop development with C++"
      3. Add an environment variable SKIKO_VSBT_PATH=C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools 
        Control Panel|All Control Panel Items|System|Advanced system settings|Environment variables
        or by running cmd as administrator: 
        setx /M SKIKO_VSBT_PATH "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools"
      4. Skiko is built using Clang-cl. Clang-cl is a part of LLVM and can be downloaded from the LLVM project's website. Please also make sure that Clang-cl.exe is available in %PATH%.

  • Install Emscripten

  • Set JAVA_HOME to location of JDK, at least version 11

  • ./gradlew :skiko:publishToMavenLocal will build the artifact and publish it to local Maven repo

To build with debug symbols and debug Skia build use -Pskiko.debug=true Gradle argument.

Working with Skia sources

Gradle build downloads the necessary version of Skia by default. However, if downloaded sources are modified, changes are discarded (Gradle re-evaluates tasks, when outputs are changed). To use custom version of the dependencies, specify SKIA_DIR environment variable.

Running UI tests

Add -Dskiko.test.ui.enabled=true to enable UI tests (integration tests, which run in the native window). Each UI test will be run on every available Graphics API of the current target.

For example, if we want to include UI tests when we test JVM target, call this:

./gradlew awtTest -Dskiko.test.ui.enabled=true

Don't run any background tasks, click mouse, or press keys during the tests. Otherwise, they probably fail.

Run samples