SkijaJava Bindings for Skia

Full Documentation Index ​

The Essentials ​

• Getting Started: A bird's-eye view of how Skija works and where to begin.
• Installation: Setting up dependencies for Windows, macOS, and Linux.
• Rendering Basics: Surfaces, Canvases, and your first "Hello World".
• Colors and Alpha: Handling transparency, premultiplication, and color spaces.
• Color API: High-precision representation, formats, and spaces.
• Animation: Creating movement, game loops, and playing Lottie/GIFs.
• Resource Management: How Skija handles native memory and the Managed lifecycle.

API Deep Dives ​

• Surface: Creating drawing destinations (Raster, GPU, Wrapped).
• Canvas: Transformations, clipping, and drawing primitives.
• Images & Bitmaps: Loading, drawing, and manipulating pixel data.
• ImageInfo: Pixel dimensions and encoding.
• ImageFilter: Pixel-level effects (blurs, shadows).
• IHasImageInfo: Interface for objects with ImageInfo.
• Sampling Mode: Defining how pixels are sampled during scaling.
• Cubic Resampler: High-quality bicubic interpolation.
• Data: Efficient native memory management.
• StreamAsset: Seekable read-only data streams.
• Matrix: 3x3 and 4x4 matrix transformations.
• Codec (Animations): Low-level image decoding and GIF/WebP animations.
• Paint & Effects: Styles, blurs, shadows, and color filters.
• Shadows: 2D drop shadows and 3D elevation-based shadows.
• Paths: Creating and combining complex geometric shapes.
• PathBuilder: Fluent API for constructing paths.
• PathMeasure: Measuring length and finding points along a path.
• Region: Integer-based area operations and hit-testing.
• Picture: Recording and replaying drawing commands for performance.

Typography & Text ​

• Typeface: Font file loading and properties.
• Font: Font size, metrics, and rendering attributes.
• Typography & Fonts: Basics of fonts and metrics.
• Text Animation & Clipping: Using text as masks, wavy text, and variable fonts.
• TextBlob & Builder: Optimized, reusable glyph runs.
• TextLine: Single-line text layout and hit-testing.
• Paragraph (Rich Text): Complex multi-style text layout and line wrapping.
• BreakIterator: Locating word, line, and sentence boundaries.

Advanced Graphics ​

• GPU Rendering: Hardware acceleration with OpenGL, Metal, Vulkan, and Direct3D.
• DirectContext: Managing GPU state and command submission.
• Shaper: Text shaping and glyph positioning (HarfBuzz).
• SkSL (RuntimeEffect): Writing custom GPU shaders for ultimate flexibility.
• PDF Generation: Creating vector-based PDF documents.

Extensions ​

• SVG: Loading and rendering SVG icons and illustrations.
• Lottie: High-performance vector animations with Skottie.