/resvg

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7868337 Dec 24, 2018
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Backend requirements

List of features required from the 2D graphics library to implement a backend for resvg.

  • Composition modes:
    • Clear
    • Darken
    • DestinationIn
    • DestinationOut
    • Lighten
    • Multiply
    • Screen
    • SourceAtop
    • SourceIn
    • SourceOut
    • SourceOver
    • Xor
  • Filling:
    • With color
    • With linear or radial gradient
    • With pattern (texture/image)
    • Fill rules:
      • NonZero/Winding
      • EvenOdd/OddEven
    • Opacity
  • Stroking:
    • With color
    • With linear or radial gradient
    • With pattern (texture/image)
    • Dasharray + Dashoffset
    • Miterlimit
    • Opacity
    • Width
    • LineCap: butt, round and square
    • LineJoin: miter, round and bevel
  • Bézier paths:
    • Anti-aliasing
    • Required segments support:
      • MoveTo
      • LineTo
      • CurveTo (cubic)
      • ClosePath
  • Text
    • Anti-aliasing
    • Font properties:
      • Family resolving (like 'Timer New Roman', monospace)
      • Style: normal, italic and oblique
      • Weight
      • Stretch
      • Variant: normal, small cap
      • Size
      • Letter spacing
      • Word spacing
    • Font metrics:
      • Text bounding box
      • Ascent/baseline
      • Overline position and thickness (optional)
      • Strikeout position and thickness (optional)
      • Underline position and thickness (optional)
  • Raster images:
    • Formats:
      • PNG
      • JPEG
    • Loading from file and memory
    • Smooth scaling