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;
}
