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Description

SVG++ library can be thought of as a framework, containing parsers for various SVG syntaxes, adapters that simplify handling of parsed data and a lot of other utilities and helpers for the most common tasks. Take a look at Tutorial to get the idea about what it is.

Code Quality Rank: L3
Programming language: C++
Tags: Image Processing     SVG     Images    
Latest version: v1.2.3

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README

SVG++ library 1.2.1

Please visit http://svgpp.org/ for description, tutorial and reference.

About

SVG++ library can be thought of as a framework, containing parsers for various SVG syntaxes, adapters that simplify handling of parsed data and a lot of other utilities and helpers for the most common tasks. Take a look at Tutorial to get the idea about what it is.

SVG++ features

  • Is a header-only library
  • Can be used with any XML parser
  • Compile time configured - no virtual functions
  • Minimal runtime overhead - you pay only for what you get

  • Has wide range of possible uses:

    • Fully functional, conforming SVG viewers
    • Simple in-app SVG rasterizers
    • Import modules of vector editing software
    • Implementing path-only input of SVG format with minimal efforts in any graphics or math software

  • Requires only Boost library itself (demo, tests and sample have their own requirements)

  • Compatible with C++03, but requires conforming implementation, due to heavy usage of templates

  • Supports any character type (char and wchar_t). Other (Unicode from C++11) were not tested, but should be ok.

SVG 1.1 features covered by SVG++

  • Path data - parsing, simplification
  • Transform list - parsing, simplification
  • Color, including ICC color - parsing
  • Lengths - highly configurable handling of SVG lengths, full support of all SVG length units
  • Basic shapes - optional conversion to path
  • Style attribute - parsing, taking in account differences in parsing presentation attributes and style properties
  • Automatic marker positions calculation
  • Viewport and viewbox handling

SVG++ is NOT

  • An SVG viewer or library that produces raster image from SVG (though C++ demo app included, which renders SVG with AGG, GDI+ or Skia graphics library)
  • Renders anything itself

What's new

  • SVG++ update 1.2.1 fixes handling text content inside <a> element that is a child of <text> element.
  • SVG++ update 1.2 focuses on reducing compiler memory usage by allowing separation of template heavy Boost.Spirit code to other compilation unit.

How to Help

  • CSS Processor. Processing CSS is outside of SVG++ scope, but it'll be nice to have some generic implementation of CSS selectors to use at preprocessing stage.
  • SVG Filter Effects. Some filters are already implemented in demo application but the complete solution requires more efforts. Generic enough parts may fit in SVG++ source base. Usage of Boost.GIL may make the code more reusable.
  • Animation. Implementation of animation in the demo application. Probably some utilities may get to SVG++.
  • Try to reduce compiler memory usage by switching to some C++11 metaprogramming library (brigand?). Evaluate upgrade to Boost.Spirit 3.0.
  • Extend demo with Cairo support?
  • More wrappers for XML parsers?
  • Evolve demo to fully functional SVG rendering component for one of the graphic engines. A major gap in demo's SVG implementation is text and font support. It'll be too complex to make it cross-engine, but for the single engine chosen and probably with third-party libraries like FreeType it's pretty feasible.