forked from Chlumsky/msdfgen
-
Notifications
You must be signed in to change notification settings - Fork 0
/
msdfgen.h
60 lines (48 loc) · 3.45 KB
/
msdfgen.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
#pragma once
/*
* MULTI-CHANNEL SIGNED DISTANCE FIELD GENERATOR v1.7 (2020-03-07)
* ---------------------------------------------------------------
* A utility by Viktor Chlumsky, (c) 2014 - 2020
*
* 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/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 "1.7"
#define MSDFGEN_DEFAULT_ERROR_CORRECTION_THRESHOLD 1.001
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 = MSDFGEN_DEFAULT_ERROR_CORRECTION_THRESHOLD, bool overlapSupport = true);
/// 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, double range, const Vector2 &scale, const Vector2 &translate, double edgeThreshold = MSDFGEN_DEFAULT_ERROR_CORRECTION_THRESHOLD, 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);
void msdfErrorCorrection(const BitmapRef<float, 4> &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 = MSDFGEN_DEFAULT_ERROR_CORRECTION_THRESHOLD);
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);
}