Java bindings for Skia.zip

[](https://confluence.jetbrains.com/display/ALL/JetBrains+on+GitHub) ⚠️ **This repository is no longer actively maintained.** ⚠️ Active Skija project is located at [HumbleUI/Skija](https://github.com/HumbleUI/Skija/) # Skija: Java bindings for Skia **Skia** is an open source 2D graphics library which provides common APIs that work across a variety of hardware and software platforms. **Skija** is a high-quality Java bindings for Skia.  ## Motivation: Why Skija? Because Java doesn’t have a powerful and modern 2D graphics — still! There are many occasions when you might need graphics: - custom UI widget libraries and whole toolkits, - graphs, diagrams, - visualizations, - games. Existing offerings are: Graphics2D from AWT, GraphicsContext from JavaFX. They are good, but underwhelming. Enter Skia. Skia has a proven track record of industrial-scale project relying on it for all things graphics: Google Chrome, Android, Flutter, Firefox Canvas, Xamarin, LibreOffice. Skia outperforms all existing Java2D toolkits in almost every benchmark, and also provides: - extensive color spaces support, - modern typography with open type features, variable typefaces, correct multi-script text handling, emojis, - highly-optimized GPU rendering, - modern GPU backends, including Vulkan and Metal (already in Skia, coming to Skija soon), - built-in caching and compositing facilities. Skija brings all this power to the tips of your fingers, as simple as adding a jar to classpath. ## Why hand-crafted bindings? Automatically generated bindings for Skia exist, but don’t seem to have high adoption: - [github.com/bytedeco/javacpp-presets/tree/master/skia](https://github.com/bytedeco/javacpp-presets/tree/master/skia) - [github.com/eungju/skia-javacpp](https://github.com/eungju/skia-javacpp) Skija project has a goal of providing great Java-native API that is natural to use. In particular: - full automatic memory management, no pointer abstractions leaking, - natural use of Java classes, interfaces, inheritance, singletons, - consistent naming following Java conventions, including getters/setters for properties, - typed enums instead of integer constants, - native Java platform abstractions instead of wrapped Skia/C++ ones (strings, arrays, streams, files, byte buffers, AutoCloseable), - hiding implementation details, e.g. transparent string encoding conversion, byte/code point indices conversion, - fluent builder-style APIs where possible, - lightweight data classes where possible (Point, Rect, FontMetrics, etc are not mirrored by native instances). The ultimate goal for Skija is to feel as a Java library and not having to think about native part at all. ## Built with Skija [Compose for Desktop](https://www.jetbrains.com/lp/compose/), declarative UI toolkit for Kotlin:  [Skija Graphics2D](https://github.com/jfree/skijagraphics2d/), an implementation of Java2D API:  [Robert Felker](https://twitter.com/BlueAquilae/status/1322696020329902082) demos: ||| |---|---| ||| [Harold](https://www.instagram.com/_hrrld/) videos:  [Skija demo app](examples/lwjgl): ||| |---|---| ||| ||| ## Current status Public alpha. Things might change without notice. Please note that Skia is known to change its API quite often (monthly). Skija will do its best to protect from these changes, but sometimes it might be impossible (e.g. method was removed). Normally it’s auxiliary stuff though, don’t worry too much. Platforms: - [x] Windows - [x] Linux - [x] macOS Backends: - [x] Bitmap - [x] OpenGL - [x] Direct3D - [x] Metal - [ ] Vulkan APIs: ``` Bitmap ▓▓▓▓▓▓▓▓▓▓ Paint ▓▓▓▓▓▓▓▓▓▓ Canvas ▓▓▓▓▓▓▓▓░░ Path ▓▓▓▓▓▓▓▓▓▓ Codec ▓▓▓▓░░░░░░ PathEffects ▓▓▓▓▓▓▓▓▓▓ Color ▓░░░░░░░░░ PathMeasure ▓▓▓▓▓▓▓▓▓▓ ColorFilter ▓▓▓▓▓▓▓▓▓▓ PaintFilterCanvas ▓▓▓▓▓▓▓▓▓▓ ColorInfo ▓▓▓▓▓▓▓▓▓▓ Picture ▓▓▓▓▓▓▓▓▓░ ColorSpace ▓▓▓▓░░░░░░ PictureRecorder ▓▓▓▓▓▓▓▓▓▓ Data ▓▓▓▓▓▓▓▓▓░ PixelRef ▓▓▓▓▓▓▓▓▓▓ Drawable ▓▓▓▓▓▓▓▓░░ Pixmap ▓▓▓▓▓▓▓▓▓▓ Flattenable ░░░░░░░░░░ Region ▓▓▓▓▓▓▓▓▓▓ Font ▓▓▓▓▓▓▓▓▓▓ RuntimeEffect ▓▓▓▓▓░░░░░ FontData ░░░░░░░░░░ ScalerContext ░░░░░░░░░░ FontManager ▓▓▓▓▓▓▓▓▓░ Shader ▓▓▓▓▓▓▓▓▓▓ FontStyle ▓▓▓▓▓▓▓▓▓▓ ShadowUtils ▓▓▓▓▓▓▓▓▓▓ FontStyleSet ▓▓▓▓▓▓▓▓▓▓ Stream ░░░░░░░░░░ Image ▓▓░░░░░░░░ String ▓░░░░░░░░░ ImageFilters ▓▓▓▓▓▓▓▓▓▓ Surface ▓░░░░░░░░░ ImageInfo ▓▓▓▓▓▓▓▓▓▓ TextBlob ▓▓▓▓▓▓▓▓▓▓ MaskFilter ▓▓▓▓▓▓▓▓▓▓ TextBlobBuilder ▓▓▓▓▓▓▓▓▓▓ Matrix33 ▓▓▓░░░░░░░ Typeface ▓▓▓▓▓▓▓▓░░ Matrix44 ▓▓▓░░░░░░░ WStream ▓▓░░░░░░░░ Shaper: Paragraph: BiDiRunIterator ▓▓▓▓▓▓▓▓▓▓ FontCollection ▓▓▓▓▓▓▓▓▓▓ FontMgrRunIterator ▓▓▓▓▓▓▓▓▓▓ LineMetrics ▓▓▓▓▓▓▓▓▓░ FontRunIterator ▓▓▓▓▓▓▓▓▓▓ Paragraph ▓▓▓▓▓▓▓▓▓▓ HbIcuScriptRunIter ▓▓▓▓▓▓▓▓▓▓ ParagraphCache ▓▓▓▓▓▓▓▓▓▓ IcuBidiRunIterator ▓▓▓▓▓▓▓▓▓▓ ParagraphStyle ▓▓▓▓▓▓▓▓▓▓ LanguageRunIterator ▓▓▓▓▓▓▓▓▓▓ ParagraphBuilder ▓▓▓▓▓▓▓▓▓▓ RunHandler ▓▓▓▓▓▓▓▓▓▓ TextStyle ▓▓▓▓▓▓▓▓▓▓ RunInfo ▓▓▓▓▓▓▓▓▓▓ TypefaceFontProvider ▓▓▓▓▓▓▓▓▓▓ ScriptRunIterator ▓▓▓▓▓▓▓▓▓▓ Shaper ▓▓▓▓▓▓▓▓▓▓ TextBlobBldRunHndlr ▓▓▓▓▓▓▓▓▓▓ SVG: SVGDOM ▓▓▓▓▓▓▓▓░░ SVGCanvas ▓▓▓▓▓▓▓▓▓▓ SVGSVG ▓▓▓▓▓▓▓▓░░ ``` ## Using Skija Using Skija is as simple as adding a jar file. Maven: ```xml <repositories> <repository> <id>space-maven</id> <url>https://packages.jetbrains.team/maven/p/skija/maven</url> </repository> </repositories> <dependencies> <dependency> <groupId>org.jetbrains.skija</groupId> <artifactId>skija-${platform}</artifactId> <version>${version}</version> </dependency> </dependencies> ``` Gradle: ```gradle reposito