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msdfgen.h
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msdfgen.h
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#pragma once
/*
* MULTI-CHANNEL SIGNED DISTANCE FIELD GENERATOR v1.6 (2019-04-08)
* ---------------------------------------------------------------
* A utility by Viktor Chlumsky, (c) 2014 - 2019
*
* 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,
* "Shape Decomposition for Multi-Channel Distance Fields". It provides improved
* quality of sharp corners in glyphs and other 2D shapes in comparison to monochrome
* distance fields. To reconstruct an image of the shape, apply the median of three
* operation on the triplet of sampled distance field values.
*
*/
#include "core/arithmetics.hpp"
#include "core/Vector2.h"
#include "core/Scanline.h"
#include "core/Shape.h"
#include "core/BitmapRef.hpp"
#include "core/Bitmap.h"
#include "core/pixel-conversion.hpp"
#include "core/edge-coloring.h"
#include "core/render-sdf.h"
#include "core/rasterization.h"
#include "core/estimate-sdf-error.h"
#include "core/save-bmp.h"
#include "core/save-tiff.h"
#include "core/shape-description.h"
#define MSDFGEN_VERSION "1.6"
namespace msdfgen {
/// Generates a conventional single-channel signed distance field.
void generateSDF(const BitmapRef<float, 1> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate, bool overlapSupport = true);
/// Generates a single-channel signed pseudo-distance field.
void generatePseudoSDF(const BitmapRef<float, 1> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate, bool overlapSupport = true);
/// Generates a multi-channel signed distance field. Edge colors must be assigned first! (See edgeColoringSimple)
void generateMSDF(const BitmapRef<float, 3> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate, double edgeThreshold = 1.001, bool overlapSupport = true);
/// Resolves multi-channel signed distance field values that may cause interpolation artifacts. (Already called by generateMSDF)
void msdfErrorCorrection(const BitmapRef<float, 3> &output, const Vector2 &threshold);
// Original simpler versions of the previous functions, which work well under normal circumstances, but cannot deal with overlapping contours.
void generateSDF_legacy(const BitmapRef<float, 1> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate);
void generatePseudoSDF_legacy(const BitmapRef<float, 1> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate);
void generateMSDF_legacy(const BitmapRef<float, 3> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate, double edgeThreshold = 1.001);
}