static void
pdf_write_strike_out_appearance(fz_context *ctx, pdf_annot *annot, fz_buffer *buf, fz_rect *rect)
{
fz_point quad[4], a, b;
float h;
pdf_obj *qp;
int i, n;
pdf_write_stroke_color_appearance(ctx, annot, buf);
qp = pdf_dict_get(ctx, annot->obj, PDF_NAME(QuadPoints));
n = pdf_array_len(ctx, qp);
if (n > 0)
{
*rect = fz_empty_rect;
for (i = 0; i < n; i += 8)
{
/* Acrobat draws the line at 3/7 of the box width from the bottom
* of the box and 1/16 thick of the box width. */
h = extract_quad(ctx, quad, qp, i);
a = lerp_point(quad[LL], quad[UL], 3/7.0f);
b = lerp_point(quad[LR], quad[UR], 3/7.0f);
fz_append_printf(ctx, buf, "%g w\n", h/16);
fz_append_printf(ctx, buf, "%g %g m\n", a.x, a.y);
fz_append_printf(ctx, buf, "%g %g l\n", b.x, b.y);
fz_append_printf(ctx, buf, "S\n");
union_quad(rect, quad, h/16);
}
}
}
static void
pdf_write_squiggly_appearance(fz_context *ctx, pdf_annot *annot, fz_buffer *buf, fz_rect *rect)
{
fz_point quad[4], a, b, c, v;
float h, x, w;
pdf_obj *qp;
int i, n;
*rect = fz_empty_rect;
pdf_write_stroke_color_appearance(ctx, annot, buf);
qp = pdf_dict_get(ctx, annot->obj, PDF_NAME(QuadPoints));
n = pdf_array_len(ctx, qp);
if (n > 0)
{
for (i = 0; i < n; i += 8)
{
int up = 1;
h = extract_quad(ctx, quad, qp, i);
v = fz_make_point(quad[LR].x - quad[LL].x, quad[LR].y - quad[LL].y);
w = sqrtf(v.x * v.x + v.y * v.y);
x = 0;
fz_append_printf(ctx, buf, "%g w\n", h/16);
fz_append_printf(ctx, buf, "%g %g m\n", quad[LL].x, quad[LL].y);
while (x < w)
{
x += h/7;
a = lerp_point(quad[LL], quad[LR], x/w);
if (up)
{
b = lerp_point(quad[UL], quad[UR], x/w);
c = lerp_point(a, b, 1/7.0f);
fz_append_printf(ctx, buf, "%g %g l\n", c.x, c.y);
}
else
fz_append_printf(ctx, buf, "%g %g l\n", a.x, a.y);
up = !up;
}
fz_append_printf(ctx, buf, "S\n");
union_quad(rect, quad, h/16);
}
}
}
void ValueTraits<ShapeValue>::Lerp(const ShapeValue& v0, const ShapeValue& v1, float t,
ShapeValue* result) {
SkASSERT(v0.fVertices.size() == v1.fVertices.size());
SkASSERT(v0.fClosed == v1.fClosed);
result->fClosed = v0.fClosed;
result->fVolatile = true; // interpolated values are volatile
const auto t2f = Sk2f(t);
result->fVertices.resize(v0.fVertices.size());
for (size_t i = 0; i < v0.fVertices.size(); ++i) {
result->fVertices[i] = BezierVertex({
lerp_point(v0.fVertices[i].fInPoint , v1.fVertices[i].fInPoint , t2f),
lerp_point(v0.fVertices[i].fOutPoint, v1.fVertices[i].fOutPoint, t2f),
lerp_point(v0.fVertices[i].fVertex , v1.fVertices[i].fVertex , t2f)
});
}
}
