mirror of https://github.com/Chlumsky/msdfgen.git
61 lines
3.5 KiB
C++
61 lines
3.5 KiB
C++
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#pragma once
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/*
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* MULTI-CHANNEL SIGNED DISTANCE FIELD GENERATOR v1.7 (2020-03-07)
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* ---------------------------------------------------------------
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* A utility by Viktor Chlumsky, (c) 2014 - 2020
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*
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* The technique used to generate multi-channel distance fields in this code
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* has been developed by Viktor Chlumsky in 2014 for his master's thesis,
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* "Shape Decomposition for Multi-Channel Distance Fields". It provides improved
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* quality of sharp corners in glyphs and other 2D shapes compared to monochrome
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* distance fields. To reconstruct an image of the shape, apply the median of three
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* operation on the triplet of sampled signed distance values.
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*
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*/
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#include "core/arithmetics.hpp"
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#include "core/Vector2.h"
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#include "core/Scanline.h"
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#include "core/Shape.h"
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#include "core/BitmapRef.hpp"
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#include "core/Bitmap.h"
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#include "core/pixel-conversion.hpp"
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#include "core/edge-coloring.h"
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#include "core/render-sdf.h"
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#include "core/rasterization.h"
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#include "core/estimate-sdf-error.h"
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#include "core/save-bmp.h"
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#include "core/save-tiff.h"
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#include "core/shape-description.h"
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#define MSDFGEN_VERSION "1.7"
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#define MSDFGEN_DEFAULT_ERROR_CORRECTION_THRESHOLD 1.001
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namespace msdfgen {
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/// Generates a conventional single-channel signed distance field.
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void generateSDF(const BitmapRef<float, 1> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate, bool overlapSupport = true);
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/// Generates a single-channel signed pseudo-distance field.
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void generatePseudoSDF(const BitmapRef<float, 1> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate, bool overlapSupport = true);
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/// Generates a multi-channel signed distance field. Edge colors must be assigned first! (See edgeColoringSimple)
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void generateMSDF(const BitmapRef<float, 3> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate, double edgeThreshold = MSDFGEN_DEFAULT_ERROR_CORRECTION_THRESHOLD, bool overlapSupport = true);
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/// Generates a multi-channel signed distance field with true distance in the alpha channel. Edge colors must be assigned first.
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void generateMTSDF(const BitmapRef<float, 4> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate, double edgeThreshold = MSDFGEN_DEFAULT_ERROR_CORRECTION_THRESHOLD, bool overlapSupport = true);
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/// Resolves multi-channel signed distance field values that may cause interpolation artifacts. (Already called by generateMSDF)
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void msdfErrorCorrection(const BitmapRef<float, 3> &output, const Vector2 &threshold);
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void msdfErrorCorrection(const BitmapRef<float, 4> &output, const Vector2 &threshold);
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// Original simpler versions of the previous functions, which work well under normal circumstances, but cannot deal with overlapping contours.
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void generateSDF_legacy(const BitmapRef<float, 1> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate);
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void generatePseudoSDF_legacy(const BitmapRef<float, 1> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate);
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void generateMSDF_legacy(const BitmapRef<float, 3> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate, double edgeThreshold = MSDFGEN_DEFAULT_ERROR_CORRECTION_THRESHOLD);
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void generateMTSDF_legacy(const BitmapRef<float, 4> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate, double edgeThreshold = MSDFGEN_DEFAULT_ERROR_CORRECTION_THRESHOLD);
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}
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