void Path(Painter& sw) { sw.Translate(52, 52); for(int i = 0; i < 2; i++) { sw.Rectangle(20, 20, 60, 60); sw.Move(0, 0); sw.Cubic(99, 0, 50, 50, 99, 99); sw.Cubic(0, 99, 50, 50, 0, 0); sw.EvenOdd(i).Fill(Green()); sw.Stroke(1, Black()); sw.Translate(120, 0); } }
virtual void Cubic(Pointf p1, Pointf p2, Pointf p3) { sw->Cubic(p1, p2, p3); }
bool RenderOutline(const FT_Outline& outline, Painter& path, double xx, double yy) { FT_Vector v_last; FT_Vector v_control; FT_Vector v_start; FT_Vector* point; FT_Vector* limit; char* tags; int n; // index of contour in outline char tag; // current point's state int first = 0; // index of first point in contour for(n = 0; n < outline.n_contours; n++) { int last = outline.contours[n]; limit = outline.points + last; v_start = outline.points[first]; v_last = outline.points[last]; v_control = v_start; point = outline.points + first; tags = outline.tags + first; tag = FT_CURVE_TAG(tags[0]); if(tag == FT_CURVE_TAG_CUBIC) return false; if(tag == FT_CURVE_TAG_CONIC) { if(FT_CURVE_TAG(outline.tags[last]) == FT_CURVE_TAG_ON) { // start at last point if it is on the curve v_start = v_last; limit--; } else { // if both first and last points are conic, // start at their middle and record its position // for closure v_start.x = (v_start.x + v_last.x) / 2; v_start.y = (v_start.y + v_last.y) / 2; v_last = v_start; } point--; tags--; } path.Move(ft_dbl(v_start.x) + xx, -ft_dbl(v_start.y) + yy); while(point < limit) { point++; tags++; tag = FT_CURVE_TAG(tags[0]); switch(tag) { case FT_CURVE_TAG_ON: path.Line(ft_dbl(point->x) + xx, -ft_dbl(point->y) + yy); continue; case FT_CURVE_TAG_CONIC: v_control.x = point->x; v_control.y = point->y; Do_Conic: if(point < limit) { FT_Vector vec; FT_Vector v_middle; point++; tags++; tag = FT_CURVE_TAG(tags[0]); vec.x = point->x; vec.y = point->y; if(tag == FT_CURVE_TAG_ON) { path.Quadratic(ft_dbl(v_control.x) + xx, -ft_dbl(v_control.y) + yy, ft_dbl(vec.x) + xx, -ft_dbl(vec.y) + yy); continue; } if(tag != FT_CURVE_TAG_CONIC) return false; v_middle.x = (v_control.x + vec.x) / 2; v_middle.y = (v_control.y + vec.y) / 2; path.Quadratic(ft_dbl(v_control.x) + xx, -ft_dbl(v_control.y) + yy, ft_dbl(v_middle.x) + xx, -ft_dbl(v_middle.y) + yy); v_control = vec; goto Do_Conic; } path.Quadratic(ft_dbl(v_control.x) + xx, -ft_dbl(v_control.y) + yy, ft_dbl(v_start.x) + xx, -ft_dbl(v_start.y) + yy); goto Close; default: FT_Vector vec1, vec2; if(point + 1 > limit || FT_CURVE_TAG(tags[1]) != FT_CURVE_TAG_CUBIC) return false; vec1.x = point[0].x; vec1.y = point[0].y; vec2.x = point[1].x; vec2.y = point[1].y; point += 2; tags += 2; if(point <= limit) { FT_Vector vec; vec.x = point->x; vec.y = point->y; path.Cubic(ft_dbl(vec1.x) + xx, -ft_dbl(vec1.y) + yy, ft_dbl(vec2.x) + xx, -ft_dbl(vec2.y) + yy, ft_dbl(vec.x) + xx, -ft_dbl(vec.y) + yy); continue; } path.Cubic(ft_dbl(vec1.x) + xx, -ft_dbl(vec1.y) + yy, ft_dbl(vec2.x) + xx, -ft_dbl(vec2.y) + yy, ft_dbl(v_start.x) + xx, -ft_dbl(v_start.y) + yy); goto Close; } } Close: path.Close(); first = last + 1; } return true; }