godot/thirdparty/msdfgen/CHANGELOG.md

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.