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CHANGELOG.md

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Version 1.11 (2023-11-11)

  • Reworked SVG parser, which now supports multiple paths and other shapes - requires Skia
  • Major performance improvements due to inlining certain low-level classes
  • A limited version of the standalone executable can now be built without any dependencies
  • Fixed listFontVariationAxes which previously reported incorrectly scaled values
  • Fixed potential crash when generating SDF from an empty Shape
  • Fixed a small bug in the error correction routine
  • Errors now reported to stderr rather than stdout
  • All command line arguments can now also be passed with two dashes instead of one
  • Added -version argument to print the program's version
  • Shape can now be loaded from a pointer to FreeType's FT_Outline
  • Added hidden CMake options to selectively disable PNG, SVG, or variable font support
  • Added CMake presets
  • Other minor bug fixes

Version 1.10 (2023-01-15)

  • Switched to vcpkg as the primary dependency management system
  • Switched to libpng as the primary PNG file encoder
  • Parameters of variable fonts can be specified
  • Fixed a bug that prevented glyph 0 to be specified in a glyphset

Version 1.9.2 (2021-12-01)

  • Improved detection of numerical errors in cubic equation solver
  • Added -windingpreprocess option
  • Fixed edge coloring not restored if lost during preprocessing

Version 1.9.1 (2021-07-09)

  • Fixed an edge case bug in the new MSDF error correction algorithm

Version 1.9 (2021-05-28)

  • Error correction of multi-channel distance fields has been completely reworked
  • Added new edge coloring strategy that optimizes colors based on distances between edges
  • Added some minor functions for the library API
  • Minor code refactor and optimizations

Version 1.8 (2020-10-17)

  • Integrated the Skia library into the project, which is used to preprocess the shape geometry and eliminate any self-intersections and other irregularities previously unsupported by the software
    • The scanline pass and overlapping contour mode is made obsolete by this step and has been disabled by default. The preprocess step can be disabled by the new -nopreprocess switch and the former enabled by -scanline and -overlap respectively.
    • The project can be built without the Skia library, forgoing the geometry preprocessing feature. This is controlled by the macro definition MSDFGEN_USE_SKIA
  • Significantly improved performance of the core algorithm by reusing results from previously computed pixels
  • Introduced an additional error correction routine which eliminates MSDF artifacts by analytically predicting results of bilinear interpolation
  • Added the possibility to load font glyphs by their index rather than a Unicode value (use the prefix g before the character code in -font argument)
  • Added -distanceshift argument that can be used to adjust the center of the distance range in the output distance field
  • Fixed several errors in the evaluation of curve distances
  • Fixed an issue with paths containing convergent corners (those whose inner angle is zero)
  • The algorithm for pseudo-distance computation slightly changed, fixing certain rare edge cases and improving consistency
  • Added the ability to supply own FT_Face handle to the msdfgen library
  • Minor refactor of the core algorithm

Version 1.7.1 (2020-03-09)

  • Fixed an edge case bug in scanline rasterization

Version 1.7 (2020-03-07)

  • Added mtsdf mode - a combination of msdf with sdf in the alpha channel
  • Distance fields can now be stored as uncompressed TIFF image files with floating point precision
  • Bitmap class refactor - template argument split into data type and number of channels, bitmap reference classes introduced
  • Added a secondary "ink trap" edge coloring heuristic, can be selected using -coloringstrategy inktrap
  • Added computation of estimated rendering error for a given SDF
  • Added computation of bounding box that includes sharp mitered corners
  • The API for bounds computation of the Shape class changed for clarity
  • Fixed several edge case bugs

Version 1.6 (2019-04-08)

  • Core algorithm rewritten to split up advanced edge selection logic into modular template arguments.
  • Pseudo-distance evaluation reworked to eliminate discontinuities at the midpoint between edges.
  • MSDF error correction reworked to also fix distances away from edges and consider diagonal pairs. Code simplified.
  • Added scanline rasterization support for Shape.
  • Added a scanline pass in the standalone version, which corrects the signs in the distance field according to the selected fill rule (-fillrule). Can be disabled using -noscanline.
  • Fixed autoframe scaling, which previously caused the output to have unnecessary empty border.
  • -guessorder switch no longer enabled by default, as the functionality is now provided by the scanline pass.
  • Updated FreeType and other libraries, changed to static linkage
  • Added 64-bit and static library builds to the Visual Studio solution

Version 1.5 (2017-07-23)

  • Fixed rounding error in cubic curve splitting.
  • SVG parser fixes and support for additional path commands.
  • Added CMake build script.

Version 1.4 (2017-02-09)

  • Reworked contour combining logic to support overlapping contours. Original algorithm preserved in functions with _legacy suffix, which are invoked by the new -legacy switch.
  • Fixed a severe bug in cubic curve distance computation, where a control point lies at the endpoint.
  • Standalone version now automatically detects if the input has the wrong orientation and adjusts the distance field accordingly. Can be disabled by -keeporder or -reverseorder switch.
  • SVG parser fixes and improvements.

Version 1.3 (2016-12-07)

  • Fixed -reverseorder switch.
  • Fixed glyph loading to use the proper method of acquiring outlines from FreeType.

Version 1.2 (2016-07-20)

  • Added option to specify that shape vertices are listed in reverse order (-reverseorder).
  • Added option to set a seed for the edge coloring heuristic (-seed <n>), which can be used to adjust the output.
  • Fixed parsing of glyph contours that start with a curve control point.

Version 1.1 (2016-05-08)

  • Switched to MIT license due to popular demand.
  • Fixed SDF rendering anti-aliasing when the output is smaller than the distance field.

Version 1.0 (2016-04-28)

  • Project published.