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msdfgen.cpp
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msdfgen.cpp
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#include "../msdfgen.h"
#include <vector>
#include "edge-selectors.h"
#include "contour-combiners.h"
#include "ShapeDistanceFinder.h"
namespace msdfgen {
template <typename DistanceType>
class DistancePixelConversion;
template <>
class DistancePixelConversion<double> {
DistanceMapping mapping;
public:
typedef BitmapRef<float, 1> BitmapRefType;
inline explicit DistancePixelConversion(DistanceMapping mapping) : mapping(mapping) { }
inline void operator()(float *pixels, double distance) const {
*pixels = float(mapping(distance));
}
};
template <>
class DistancePixelConversion<MultiDistance> {
DistanceMapping mapping;
public:
typedef BitmapRef<float, 3> BitmapRefType;
inline explicit DistancePixelConversion(DistanceMapping mapping) : mapping(mapping) { }
inline void operator()(float *pixels, const MultiDistance &distance) const {
pixels[0] = float(mapping(distance.r));
pixels[1] = float(mapping(distance.g));
pixels[2] = float(mapping(distance.b));
}
};
template <>
class DistancePixelConversion<MultiAndTrueDistance> {
DistanceMapping mapping;
public:
typedef BitmapRef<float, 4> BitmapRefType;
inline explicit DistancePixelConversion(DistanceMapping mapping) : mapping(mapping) { }
inline void operator()(float *pixels, const MultiAndTrueDistance &distance) const {
pixels[0] = float(mapping(distance.r));
pixels[1] = float(mapping(distance.g));
pixels[2] = float(mapping(distance.b));
pixels[3] = float(mapping(distance.a));
}
};
template <class ContourCombiner>
void generateDistanceField(const typename DistancePixelConversion<typename ContourCombiner::DistanceType>::BitmapRefType &output, const Shape &shape, const SDFTransformation &transformation) {
DistancePixelConversion<typename ContourCombiner::DistanceType> distancePixelConversion(transformation.distanceMapping);
#ifdef MSDFGEN_USE_OPENMP
#pragma omp parallel
#endif
{
ShapeDistanceFinder<ContourCombiner> distanceFinder(shape);
bool rightToLeft = false;
#ifdef MSDFGEN_USE_OPENMP
#pragma omp for
#endif
for (int y = 0; y < output.height; ++y) {
int row = shape.inverseYAxis ? output.height-y-1 : y;
for (int col = 0; col < output.width; ++col) {
int x = rightToLeft ? output.width-col-1 : col;
Point2 p = transformation.unproject(Point2(x+.5, y+.5));
typename ContourCombiner::DistanceType distance = distanceFinder.distance(p);
distancePixelConversion(output(x, row), distance);
}
rightToLeft = !rightToLeft;
}
}
}
void generateSDF(const BitmapRef<float, 1> &output, const Shape &shape, const SDFTransformation &transformation, const GeneratorConfig &config) {
if (config.overlapSupport)
generateDistanceField<OverlappingContourCombiner<TrueDistanceSelector> >(output, shape, transformation);
else
generateDistanceField<SimpleContourCombiner<TrueDistanceSelector> >(output, shape, transformation);
}
void generatePSDF(const BitmapRef<float, 1> &output, const Shape &shape, const SDFTransformation &transformation, const GeneratorConfig &config) {
if (config.overlapSupport)
generateDistanceField<OverlappingContourCombiner<PerpendicularDistanceSelector> >(output, shape, transformation);
else
generateDistanceField<SimpleContourCombiner<PerpendicularDistanceSelector> >(output, shape, transformation);
}
void generateMSDF(const BitmapRef<float, 3> &output, const Shape &shape, const SDFTransformation &transformation, const MSDFGeneratorConfig &config) {
if (config.overlapSupport)
generateDistanceField<OverlappingContourCombiner<MultiDistanceSelector> >(output, shape, transformation);
else
generateDistanceField<SimpleContourCombiner<MultiDistanceSelector> >(output, shape, transformation);
msdfErrorCorrection(output, shape, transformation, config);
}
void generateMTSDF(const BitmapRef<float, 4> &output, const Shape &shape, const SDFTransformation &transformation, const MSDFGeneratorConfig &config) {
if (config.overlapSupport)
generateDistanceField<OverlappingContourCombiner<MultiAndTrueDistanceSelector> >(output, shape, transformation);
else
generateDistanceField<SimpleContourCombiner<MultiAndTrueDistanceSelector> >(output, shape, transformation);
msdfErrorCorrection(output, shape, transformation, config);
}
void generateSDF(const BitmapRef<float, 1> &output, const Shape &shape, const Projection &projection, Range range, const GeneratorConfig &config) {
if (config.overlapSupport)
generateDistanceField<OverlappingContourCombiner<TrueDistanceSelector> >(output, shape, SDFTransformation(projection, range));
else
generateDistanceField<SimpleContourCombiner<TrueDistanceSelector> >(output, shape, SDFTransformation(projection, range));
}
void generatePSDF(const BitmapRef<float, 1> &output, const Shape &shape, const Projection &projection, Range range, const GeneratorConfig &config) {
if (config.overlapSupport)
generateDistanceField<OverlappingContourCombiner<PerpendicularDistanceSelector> >(output, shape, SDFTransformation(projection, range));
else
generateDistanceField<SimpleContourCombiner<PerpendicularDistanceSelector> >(output, shape, SDFTransformation(projection, range));
}
void generateMSDF(const BitmapRef<float, 3> &output, const Shape &shape, const Projection &projection, Range range, const MSDFGeneratorConfig &config) {
if (config.overlapSupport)
generateDistanceField<OverlappingContourCombiner<MultiDistanceSelector> >(output, shape, SDFTransformation(projection, range));
else
generateDistanceField<SimpleContourCombiner<MultiDistanceSelector> >(output, shape, SDFTransformation(projection, range));
msdfErrorCorrection(output, shape, SDFTransformation(projection, range), config);
}
void generateMTSDF(const BitmapRef<float, 4> &output, const Shape &shape, const Projection &projection, Range range, const MSDFGeneratorConfig &config) {
if (config.overlapSupport)
generateDistanceField<OverlappingContourCombiner<MultiAndTrueDistanceSelector> >(output, shape, SDFTransformation(projection, range));
else
generateDistanceField<SimpleContourCombiner<MultiAndTrueDistanceSelector> >(output, shape, SDFTransformation(projection, range));
msdfErrorCorrection(output, shape, SDFTransformation(projection, range), config);
}
// Legacy API
void generatePseudoSDF(const BitmapRef<float, 1> &output, const Shape &shape, const Projection &projection, Range range, const GeneratorConfig &config) {
generatePSDF(output, shape, SDFTransformation(projection, range), config);
}
void generateSDF(const BitmapRef<float, 1> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, bool overlapSupport) {
generateSDF(output, shape, Projection(scale, translate), range, GeneratorConfig(overlapSupport));
}
void generatePSDF(const BitmapRef<float, 1> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, bool overlapSupport) {
generatePSDF(output, shape, Projection(scale, translate), range, GeneratorConfig(overlapSupport));
}
void generatePseudoSDF(const BitmapRef<float, 1> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, bool overlapSupport) {
generatePSDF(output, shape, Projection(scale, translate), range, GeneratorConfig(overlapSupport));
}
void generateMSDF(const BitmapRef<float, 3> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, const ErrorCorrectionConfig &errorCorrectionConfig, bool overlapSupport) {
generateMSDF(output, shape, Projection(scale, translate), range, MSDFGeneratorConfig(overlapSupport, errorCorrectionConfig));
}
void generateMTSDF(const BitmapRef<float, 4> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, const ErrorCorrectionConfig &errorCorrectionConfig, bool overlapSupport) {
generateMTSDF(output, shape, Projection(scale, translate), range, MSDFGeneratorConfig(overlapSupport, errorCorrectionConfig));
}
// Legacy version
void generateSDF_legacy(const BitmapRef<float, 1> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate) {
DistanceMapping distanceMapping(range);
#ifdef MSDFGEN_USE_OPENMP
#pragma omp parallel for
#endif
for (int y = 0; y < output.height; ++y) {
int row = shape.inverseYAxis ? output.height-y-1 : y;
for (int x = 0; x < output.width; ++x) {
double dummy;
Point2 p = Vector2(x+.5, y+.5)/scale-translate;
SignedDistance minDistance;
for (std::vector<Contour>::const_iterator contour = shape.contours.begin(); contour != shape.contours.end(); ++contour)
for (std::vector<EdgeHolder>::const_iterator edge = contour->edges.begin(); edge != contour->edges.end(); ++edge) {
SignedDistance distance = (*edge)->signedDistance(p, dummy);
if (distance < minDistance)
minDistance = distance;
}
*output(x, row) = float(distanceMapping(minDistance.distance));
}
}
}
void generatePSDF_legacy(const BitmapRef<float, 1> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate) {
DistanceMapping distanceMapping(range);
#ifdef MSDFGEN_USE_OPENMP
#pragma omp parallel for
#endif
for (int y = 0; y < output.height; ++y) {
int row = shape.inverseYAxis ? output.height-y-1 : y;
for (int x = 0; x < output.width; ++x) {
Point2 p = Vector2(x+.5, y+.5)/scale-translate;
SignedDistance minDistance;
const EdgeHolder *nearEdge = NULL;
double nearParam = 0;
for (std::vector<Contour>::const_iterator contour = shape.contours.begin(); contour != shape.contours.end(); ++contour)
for (std::vector<EdgeHolder>::const_iterator edge = contour->edges.begin(); edge != contour->edges.end(); ++edge) {
double param;
SignedDistance distance = (*edge)->signedDistance(p, param);
if (distance < minDistance) {
minDistance = distance;
nearEdge = &*edge;
nearParam = param;
}
}
if (nearEdge)
(*nearEdge)->distanceToPerpendicularDistance(minDistance, p, nearParam);
*output(x, row) = float(distanceMapping(minDistance.distance));
}
}
}
void generatePseudoSDF_legacy(const BitmapRef<float, 1> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate) {
generatePSDF_legacy(output, shape, range, scale, translate);
}
void generateMSDF_legacy(const BitmapRef<float, 3> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, ErrorCorrectionConfig errorCorrectionConfig) {
DistanceMapping distanceMapping(range);
#ifdef MSDFGEN_USE_OPENMP
#pragma omp parallel for
#endif
for (int y = 0; y < output.height; ++y) {
int row = shape.inverseYAxis ? output.height-y-1 : y;
for (int x = 0; x < output.width; ++x) {
Point2 p = Vector2(x+.5, y+.5)/scale-translate;
struct {
SignedDistance minDistance;
const EdgeHolder *nearEdge;
double nearParam;
} r, g, b;
r.nearEdge = g.nearEdge = b.nearEdge = NULL;
r.nearParam = g.nearParam = b.nearParam = 0;
for (std::vector<Contour>::const_iterator contour = shape.contours.begin(); contour != shape.contours.end(); ++contour)
for (std::vector<EdgeHolder>::const_iterator edge = contour->edges.begin(); edge != contour->edges.end(); ++edge) {
double param;
SignedDistance distance = (*edge)->signedDistance(p, param);
if ((*edge)->color&RED && distance < r.minDistance) {
r.minDistance = distance;
r.nearEdge = &*edge;
r.nearParam = param;
}
if ((*edge)->color&GREEN && distance < g.minDistance) {
g.minDistance = distance;
g.nearEdge = &*edge;
g.nearParam = param;
}
if ((*edge)->color&BLUE && distance < b.minDistance) {
b.minDistance = distance;
b.nearEdge = &*edge;
b.nearParam = param;
}
}
if (r.nearEdge)
(*r.nearEdge)->distanceToPerpendicularDistance(r.minDistance, p, r.nearParam);
if (g.nearEdge)
(*g.nearEdge)->distanceToPerpendicularDistance(g.minDistance, p, g.nearParam);
if (b.nearEdge)
(*b.nearEdge)->distanceToPerpendicularDistance(b.minDistance, p, b.nearParam);
output(x, row)[0] = float(distanceMapping(r.minDistance.distance));
output(x, row)[1] = float(distanceMapping(g.minDistance.distance));
output(x, row)[2] = float(distanceMapping(b.minDistance.distance));
}
}
errorCorrectionConfig.distanceCheckMode = ErrorCorrectionConfig::DO_NOT_CHECK_DISTANCE;
msdfErrorCorrection(output, shape, Projection(scale, translate), range, MSDFGeneratorConfig(false, errorCorrectionConfig));
}
void generateMTSDF_legacy(const BitmapRef<float, 4> &output, const Shape &shape, Range range, const Vector2 &scale, const Vector2 &translate, ErrorCorrectionConfig errorCorrectionConfig) {
DistanceMapping distanceMapping(range);
#ifdef MSDFGEN_USE_OPENMP
#pragma omp parallel for
#endif
for (int y = 0; y < output.height; ++y) {
int row = shape.inverseYAxis ? output.height-y-1 : y;
for (int x = 0; x < output.width; ++x) {
Point2 p = Vector2(x+.5, y+.5)/scale-translate;
SignedDistance minDistance;
struct {
SignedDistance minDistance;
const EdgeHolder *nearEdge;
double nearParam;
} r, g, b;
r.nearEdge = g.nearEdge = b.nearEdge = NULL;
r.nearParam = g.nearParam = b.nearParam = 0;
for (std::vector<Contour>::const_iterator contour = shape.contours.begin(); contour != shape.contours.end(); ++contour)
for (std::vector<EdgeHolder>::const_iterator edge = contour->edges.begin(); edge != contour->edges.end(); ++edge) {
double param;
SignedDistance distance = (*edge)->signedDistance(p, param);
if (distance < minDistance)
minDistance = distance;
if ((*edge)->color&RED && distance < r.minDistance) {
r.minDistance = distance;
r.nearEdge = &*edge;
r.nearParam = param;
}
if ((*edge)->color&GREEN && distance < g.minDistance) {
g.minDistance = distance;
g.nearEdge = &*edge;
g.nearParam = param;
}
if ((*edge)->color&BLUE && distance < b.minDistance) {
b.minDistance = distance;
b.nearEdge = &*edge;
b.nearParam = param;
}
}
if (r.nearEdge)
(*r.nearEdge)->distanceToPerpendicularDistance(r.minDistance, p, r.nearParam);
if (g.nearEdge)
(*g.nearEdge)->distanceToPerpendicularDistance(g.minDistance, p, g.nearParam);
if (b.nearEdge)
(*b.nearEdge)->distanceToPerpendicularDistance(b.minDistance, p, b.nearParam);
output(x, row)[0] = float(distanceMapping(r.minDistance.distance));
output(x, row)[1] = float(distanceMapping(g.minDistance.distance));
output(x, row)[2] = float(distanceMapping(b.minDistance.distance));
output(x, row)[3] = float(distanceMapping(minDistance.distance));
}
}
errorCorrectionConfig.distanceCheckMode = ErrorCorrectionConfig::DO_NOT_CHECK_DISTANCE;
msdfErrorCorrection(output, shape, Projection(scale, translate), range, MSDFGeneratorConfig(false, errorCorrectionConfig));
}
}