4c3f7d1290
Adds multi-channel SDF font texture generation and rendering support. Adds per-font oversampling support. Adds FontData import plugins (for dynamic fonts, BMFonts and monospaced image fonts), font texture cache pre-generation and loading. Adds BMFont binary format and outline support.
115 lines
4.4 KiB
C++
115 lines
4.4 KiB
C++
|
|
#include "rasterization.h"
|
|
|
|
#include <vector>
|
|
#include "arithmetics.hpp"
|
|
|
|
namespace msdfgen {
|
|
|
|
void rasterize(const BitmapRef<float, 1> &output, const Shape &shape, const Projection &projection, FillRule fillRule) {
|
|
Scanline scanline;
|
|
for (int y = 0; y < output.height; ++y) {
|
|
int row = shape.inverseYAxis ? output.height-y-1 : y;
|
|
shape.scanline(scanline, projection.unprojectY(y+.5));
|
|
for (int x = 0; x < output.width; ++x)
|
|
*output(x, row) = (float) scanline.filled(projection.unprojectX(x+.5), fillRule);
|
|
}
|
|
}
|
|
|
|
void distanceSignCorrection(const BitmapRef<float, 1> &sdf, const Shape &shape, const Projection &projection, FillRule fillRule) {
|
|
Scanline scanline;
|
|
for (int y = 0; y < sdf.height; ++y) {
|
|
int row = shape.inverseYAxis ? sdf.height-y-1 : y;
|
|
shape.scanline(scanline, projection.unprojectY(y+.5));
|
|
for (int x = 0; x < sdf.width; ++x) {
|
|
bool fill = scanline.filled(projection.unprojectX(x+.5), fillRule);
|
|
float &sd = *sdf(x, row);
|
|
if ((sd > .5f) != fill)
|
|
sd = 1.f-sd;
|
|
}
|
|
}
|
|
}
|
|
|
|
template <int N>
|
|
static void multiDistanceSignCorrection(const BitmapRef<float, N> &sdf, const Shape &shape, const Projection &projection, FillRule fillRule) {
|
|
int w = sdf.width, h = sdf.height;
|
|
if (!(w*h))
|
|
return;
|
|
Scanline scanline;
|
|
bool ambiguous = false;
|
|
std::vector<char> matchMap;
|
|
matchMap.resize(w*h);
|
|
char *match = &matchMap[0];
|
|
for (int y = 0; y < h; ++y) {
|
|
int row = shape.inverseYAxis ? h-y-1 : y;
|
|
shape.scanline(scanline, projection.unprojectY(y+.5));
|
|
for (int x = 0; x < w; ++x) {
|
|
bool fill = scanline.filled(projection.unprojectX(x+.5), fillRule);
|
|
float *msd = sdf(x, row);
|
|
float sd = median(msd[0], msd[1], msd[2]);
|
|
if (sd == .5f)
|
|
ambiguous = true;
|
|
else if ((sd > .5f) != fill) {
|
|
msd[0] = 1.f-msd[0];
|
|
msd[1] = 1.f-msd[1];
|
|
msd[2] = 1.f-msd[2];
|
|
*match = -1;
|
|
} else
|
|
*match = 1;
|
|
if (N >= 4 && (msd[3] > .5f) != fill)
|
|
msd[3] = 1.f-msd[3];
|
|
++match;
|
|
}
|
|
}
|
|
// This step is necessary to avoid artifacts when whole shape is inverted
|
|
if (ambiguous) {
|
|
match = &matchMap[0];
|
|
for (int y = 0; y < h; ++y) {
|
|
int row = shape.inverseYAxis ? h-y-1 : y;
|
|
for (int x = 0; x < w; ++x) {
|
|
if (!*match) {
|
|
int neighborMatch = 0;
|
|
if (x > 0) neighborMatch += *(match-1);
|
|
if (x < w-1) neighborMatch += *(match+1);
|
|
if (y > 0) neighborMatch += *(match-w);
|
|
if (y < h-1) neighborMatch += *(match+w);
|
|
if (neighborMatch < 0) {
|
|
float *msd = sdf(x, row);
|
|
msd[0] = 1.f-msd[0];
|
|
msd[1] = 1.f-msd[1];
|
|
msd[2] = 1.f-msd[2];
|
|
}
|
|
}
|
|
++match;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void distanceSignCorrection(const BitmapRef<float, 3> &sdf, const Shape &shape, const Projection &projection, FillRule fillRule) {
|
|
multiDistanceSignCorrection(sdf, shape, projection, fillRule);
|
|
}
|
|
|
|
void distanceSignCorrection(const BitmapRef<float, 4> &sdf, const Shape &shape, const Projection &projection, FillRule fillRule) {
|
|
multiDistanceSignCorrection(sdf, shape, projection, fillRule);
|
|
}
|
|
|
|
// Legacy API
|
|
|
|
void rasterize(const BitmapRef<float, 1> &output, const Shape &shape, const Vector2 &scale, const Vector2 &translate, FillRule fillRule) {
|
|
rasterize(output, shape, Projection(scale, translate), fillRule);
|
|
}
|
|
|
|
void distanceSignCorrection(const BitmapRef<float, 1> &sdf, const Shape &shape, const Vector2 &scale, const Vector2 &translate, FillRule fillRule) {
|
|
distanceSignCorrection(sdf, shape, Projection(scale, translate), fillRule);
|
|
}
|
|
|
|
void distanceSignCorrection(const BitmapRef<float, 3> &sdf, const Shape &shape, const Vector2 &scale, const Vector2 &translate, FillRule fillRule) {
|
|
distanceSignCorrection(sdf, shape, Projection(scale, translate), fillRule);
|
|
}
|
|
|
|
void distanceSignCorrection(const BitmapRef<float, 4> &sdf, const Shape &shape, const Vector2 &scale, const Vector2 &translate, FillRule fillRule) {
|
|
distanceSignCorrection(sdf, shape, Projection(scale, translate), fillRule);
|
|
}
|
|
|
|
}
|