Sdf font designer

3rdparty/msdfgen/CHANGELOG.md

@@ -0,0 +1,115 @@
+
+## 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.