msdfgen: Sync with upstream 1.10

(cherry picked from commit 3c25dfe0e4)

COPYRIGHT.txt

@@ -390,7 +390,7 @@ License: BSD-2-clause
 
 Files: ./thirdparty/msdfgen/
 Comment: Multi-channel signed distance field generator
-Copyright: 2016, Viktor Chlumsky
+Copyright: 2016-2022, Viktor Chlumsky
 License: MIT
 
 Files: ./thirdparty/oidn/

thirdparty/README.md

@@ -528,14 +528,14 @@ Collection of single-file libraries used in Godot components.
 ## msdfgen
 
 - Upstream: https://github.com/Chlumsky/msdfgen
-- Version: 1.9.2 (64a91eec3ca3787e6f78b4c99fcd3052ad3e37c0, 2021)
+- Version: 1.10 (64a91eec3ca3787e6f78b4c99fcd3052ad3e37c0, 2021)
 - License: MIT
 
 Files extracted from the upstream source:
 
 - `msdfgen.h`
 - Files in `core/` folder.
-- `LICENSE.txt` and `CHANGELOG.md`
+- `LICENSE.txt`
 
 
 ## oidn

thirdparty/msdfgen/CHANGELOG.md

@@ -1,82 +0,0 @@
-
-## 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.

thirdparty/msdfgen/LICENSE.txt

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2016 Viktor Chlumsky
+Copyright (c) 2016 - 2022 Viktor Chlumsky
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

thirdparty/msdfgen/core/SignedDistance.cpp

@@ -2,12 +2,11 @@
 #include "SignedDistance.h"
 
 #include <cmath>
+#include <cfloat>
 
 namespace msdfgen {
 
-const SignedDistance SignedDistance::INFINITE(-1e240, 1);
-
-SignedDistance::SignedDistance() : distance(-1e240), dot(1) { }
+SignedDistance::SignedDistance() : distance(-DBL_MAX), dot(1) { }
 
 SignedDistance::SignedDistance(double dist, double d) : distance(dist), dot(d) { }
 

thirdparty/msdfgen/core/SignedDistance.h

@@ -7,8 +7,6 @@ namespace msdfgen {
 class SignedDistance {
 
 public:
-    static const SignedDistance INFINITE;
-
     double distance;
     double dot;
 

thirdparty/msdfgen/core/contour-combiners.cpp

@@ -1,18 +1,19 @@
 
 #include "contour-combiners.h"
 
+#include <cfloat>
 #include "arithmetics.hpp"
 
 namespace msdfgen {
 
 static void initDistance(double &distance) {
-    distance = SignedDistance::INFINITE.distance;
+    distance = -DBL_MAX;
 }
 
 static void initDistance(MultiDistance &distance) {
-    distance.r = SignedDistance::INFINITE.distance;
-    distance.g = SignedDistance::INFINITE.distance;
-    distance.b = SignedDistance::INFINITE.distance;
+    distance.r = -DBL_MAX;
+    distance.g = -DBL_MAX;
+    distance.b = -DBL_MAX;
 }
 
 static double resolveDistance(double distance) {

thirdparty/msdfgen/core/edge-coloring.cpp

@@ -4,6 +4,7 @@
 #include <cstdlib>
 #include <cmath>
 #include <cstring>
+#include <cfloat>
 #include <queue>
 #include "arithmetics.hpp"
 
@@ -244,7 +245,7 @@ static double edgeToEdgeDistance(const EdgeSegment &a, const EdgeSegment &b, int
 }
 
 static double splineToSplineDistance(EdgeSegment * const *edgeSegments, int aStart, int aEnd, int bStart, int bEnd, int precision) {
-    double minDistance = fabs(SignedDistance::INFINITE.distance);
+    double minDistance = DBL_MAX;
     for (int ai = aStart; ai < aEnd; ++ai)
         for (int bi = bStart; bi < bEnd && minDistance; ++bi) {
             double d = edgeToEdgeDistance(*edgeSegments[ai], *edgeSegments[bi], precision);

thirdparty/msdfgen/core/generator-config.h

@@ -4,14 +4,18 @@
 #include <cstdlib>
 #include "BitmapRef.hpp"
 
+#ifndef MSDFGEN_PUBLIC
+#define MSDFGEN_PUBLIC // for DLL import/export
+#endif
+
 namespace msdfgen {
 
 /// The configuration of the MSDF error correction pass.
 struct ErrorCorrectionConfig {
     /// The default value of minDeviationRatio.
-    static const double defaultMinDeviationRatio;
+    static MSDFGEN_PUBLIC const double defaultMinDeviationRatio;
     /// The default value of minImproveRatio.
-    static const double defaultMinImproveRatio;
+    static MSDFGEN_PUBLIC const double defaultMinImproveRatio;
 
     /// Mode of operation.
     enum Mode {

thirdparty/msdfgen/msdfgen.h

@@ -2,9 +2,9 @@
 #pragma once
 
 /*
- * MULTI-CHANNEL SIGNED DISTANCE FIELD GENERATOR v1.9 (2021-05-28)
- * ---------------------------------------------------------------
- * A utility by Viktor Chlumsky, (c) 2014 - 2021
+ * MULTI-CHANNEL SIGNED DISTANCE FIELD GENERATOR
+ * ---------------------------------------------
+ * A utility by Viktor Chlumsky, (c) 2014 - 2022
  *
  * The technique used to generate multi-channel distance fields in this code
  * has been developed by Viktor Chlumsky in 2014 for his master's thesis,
@@ -34,8 +34,6 @@
 #include "core/save-tiff.h"
 #include "core/shape-description.h"
 
-#define MSDFGEN_VERSION "1.9"
-
 namespace msdfgen {
 
 /// Generates a conventional single-channel signed distance field.