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Implemented bounding box optimization for generateSDF_legacy method

This commit is contained in:
mtehver 2017-06-09 11:14:43 +03:00
parent 2c5da0a268
commit 115fcb6afd
1 changed files with 10 additions and 1 deletions
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11
core/msdfgen.cpp
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@ -365,17 +365,26 @@ void generateMSDF(Bitmap<FloatRGB> &output, const Shape &shape, double range, co
void generateSDF_legacy(Bitmap<float> &output, const Shape &shape, double range, const Vector2 &scale, const Vector2 &translate) {
int w = output.width(), h = output.height();
std::vector<EdgeBounds> edgeBounds = buildEdgeBounds(shape);
#ifdef MSDFGEN_USE_OPENMP
#pragma omp parallel for
#endif
EdgeHolder closestEdge;
for (int y = 0; y < h; ++y) {
int row = shape.inverseYAxis ? h-y-1 : y;
for (int x = 0; x < w; ++x) {
double dummy;
Point2 p = Vector2(x+.5, y+.5)/scale-translate;
SignedDistance minDistance;
if (closestEdge)
minDistance = closestEdge->signedDistance(p, dummy);
std::vector<EdgeBounds>::const_iterator bounds = edgeBounds.begin();
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) {
for (std::vector<EdgeHolder>::const_iterator edge = contour->edges.begin(); edge != contour->edges.end(); ++edge, ++bounds) {
double absDist = fabs(minDistance.distance);
if (p.x + absDist < bounds->l || bounds->r + absDist < p.x || p.y + absDist < bounds->b || bounds->t + absDist < p.y)
continue;
SignedDistance distance = (*edge)->signedDistance(p, dummy);
if (distance < minDistance)
minDistance = distance;