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msdfgen.h
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msdfgen.h
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#pragma once
/*
* MULTI-CHANNEL SIGNED DISTANCE FIELD GENERATOR
* ---------------------------------------------
* A utility by Viktor Chlumsky, (c) 2014 - 2024
*
* 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 compared to monochrome
* distance fields. To reconstruct an image of the shape, apply the median of three
* operation on the triplet of sampled signed distance values.
*
*/
#include "core/base.h"
#include "core/arithmetics.hpp"
#include "core/Vector2.hpp"
#include "core/Range.hpp"
#include "core/Projection.h"
#include "core/DistanceMapping.h"
#include "core/SDFTransformation.h"
#include "core/Scanline.h"
#include "core/Shape.h"
#include "core/BitmapRef.hpp"
#include "core/Bitmap.h"
#include "core/bitmap-interpolation.hpp"
#include "core/pixel-conversion.hpp"
#include "core/edge-coloring.h"
#include "core/generator-config.h"
#include "core/msdf-error-correction.h"
#include "core/render-sdf.h"
#include "core/rasterization.h"
#include "core/sdf-error-estimation.h"
#include "core/save-bmp.h"
#include "core/save-tiff.h"
#include "core/shape-description.h"
namespace msdfgen {
/// Generates a conventional single-channel signed distance field.
void generateSDF(const BitmapRef<float, 1> &output, const Shape &shape, const SDFTransformation &transformation, const GeneratorConfig &config = GeneratorConfig());
/// Generates a single-channel signed perpendicular distance field.
void generatePSDF(const BitmapRef<float, 1> &output, const Shape &shape, const SDFTransformation &transformation, const GeneratorConfig &config = GeneratorConfig());
/// 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, const SDFTransformation &transformation, const MSDFGeneratorConfig &config = MSDFGeneratorConfig());
/// Generates a multi-channel signed distance field with true distance in the alpha channel. Edge colors must be assigned first.
void generateMTSDF(const BitmapRef<float, 4> &output, const Shape &shape, const SDFTransformation &transformation, const MSDFGeneratorConfig &config = MSDFGeneratorConfig());
// Old version of the function API's kept for backwards compatibility
void generateSDF(const BitmapRef<float, 1> &output, const Shape &shape, const Projection &projection, Range range, const GeneratorConfig &config = GeneratorConfig());
void generatePSDF(const BitmapRef<float, 1> &output, const Shape &shape, const Projection &projection, Range range, const GeneratorConfig &config = GeneratorConfig());
void generatePseudoSDF(const BitmapRef<float, 1> &output, const Shape &shape, const Projection &projection, Range range, const GeneratorConfig &config = GeneratorConfig());
void generateMSDF(const BitmapRef<float, 3> &output, const Shape &shape, const Projection &projection, Range range, const MSDFGeneratorConfig &config = MSDFGeneratorConfig());
void generateMTSDF(const BitmapRef<float, 4> &output, const Shape &shape, const Projection &projection, Range range, const MSDFGeneratorConfig &config = MSDFGeneratorConfig());
void generateSDF(const BitmapRef<float, 1> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, bool overlapSupport = true);
void generatePSDF(const BitmapRef<float, 1> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, bool overlapSupport = true);
void generatePseudoSDF(const BitmapRef<float, 1> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, bool overlapSupport = true);
void generateMSDF(const BitmapRef<float, 3> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, const ErrorCorrectionConfig &errorCorrectionConfig = ErrorCorrectionConfig(), bool overlapSupport = true);
void generateMTSDF(const BitmapRef<float, 4> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, const ErrorCorrectionConfig &errorCorrectionConfig = ErrorCorrectionConfig(), bool overlapSupport = true);
// 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, Range range, const Vector2 &scale, const Vector2 &translate);
void generatePSDF_legacy(const BitmapRef<float, 1> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate);
void generatePseudoSDF_legacy(const BitmapRef<float, 1> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate);
void generateMSDF_legacy(const BitmapRef<float, 3> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, ErrorCorrectionConfig errorCorrectionConfig = ErrorCorrectionConfig());
void generateMTSDF_legacy(const BitmapRef<float, 4> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, ErrorCorrectionConfig errorCorrectionConfig = ErrorCorrectionConfig());
}