void
fz_flatten_dash_path(fz_gel *gel, fz_path *path, const fz_stroke_state *stroke, const fz_matrix *ctm, float flatness, float linewidth)
{
struct sctx s;
fz_point p0, p1, p2, p3, beg;
float phase_len, max_expand;
int i;
s.gel = gel;
s.ctm = ctm;
s.flatness = flatness;
s.linejoin = stroke->linejoin;
s.linewidth = linewidth * 0.5f;
s.miterlimit = stroke->miterlimit;
s.sn = 0;
s.bn = 0;
s.dot = 0;
s.dash_list = stroke->dash_list;
s.dash_phase = stroke->dash_phase;
s.dash_len = stroke->dash_len;
s.toggle = 0;
s.offset = 0;
s.phase = 0;
s.cap = stroke->start_cap;
if (path->len > 0 && path->items[0].k != FZ_MOVETO)
return;
phase_len = 0;
for (i = 0; i < stroke->dash_len; i++)
phase_len += stroke->dash_list[i];
max_expand = fz_matrix_max_expansion(ctm);
if (phase_len < 1.0f && phase_len * max_expand < 0.5f)
{
fz_flatten_stroke_path(gel, path, stroke, ctm, flatness, linewidth);
return;
}
p0.x = p0.y = 0;
i = 0;
while (i < path->len)
{
switch (path->items[i++].k)
{
case FZ_MOVETO:
p1.x = path->items[i++].v;
p1.y = path->items[i++].v;
fz_dash_moveto(&s, p1, stroke->start_cap, stroke->end_cap);
beg = p0 = p1;
break;
case FZ_LINETO:
p1.x = path->items[i++].v;
p1.y = path->items[i++].v;
fz_dash_lineto(&s, p1, stroke->dash_cap, 0);
p0 = p1;
break;
case FZ_CURVETO:
p1.x = path->items[i++].v;
p1.y = path->items[i++].v;
p2.x = path->items[i++].v;
p2.y = path->items[i++].v;
p3.x = path->items[i++].v;
p3.y = path->items[i++].v;
fz_dash_bezier(&s, p0.x, p0.y, p1.x, p1.y, p2.x, p2.y, p3.x, p3.y, 0, stroke->dash_cap);
p0 = p3;
break;
case FZ_CLOSE_PATH:
fz_dash_lineto(&s, beg, stroke->dash_cap, 0);
p0 = p1 = beg;
break;
}
}
fz_stroke_flush(&s, s.cap, stroke->end_cap);
}
void
fz_flatten_dash_path(fz_gel *gel, fz_path *path, const fz_stroke_state *stroke, const fz_matrix *ctm, float flatness, float linewidth)
{
struct sctx s;
fz_point p0, p1, p2, p3, beg;
float phase_len, max_expand;
int i, k;
fz_matrix inv;
s.gel = gel;
s.ctm = ctm;
s.flatness = flatness;
s.linejoin = stroke->linejoin;
s.linewidth = linewidth * 0.5f;
s.miterlimit = stroke->miterlimit;
s.sn = 0;
s.dot = 0;
s.dash_list = stroke->dash_list;
s.dash_phase = stroke->dash_phase;
s.dash_len = stroke->dash_len;
s.toggle = 0;
s.offset = 0;
s.phase = 0;
s.cap = stroke->start_cap;
if (path->cmd_len > 0 && path->cmds[0] != FZ_MOVETO)
return;
phase_len = 0;
for (i = 0; i < stroke->dash_len; i++)
phase_len += stroke->dash_list[i];
if (stroke->dash_len > 0 && phase_len == 0)
return;
fz_gel_scissor(gel, &s.rect);
if (fz_try_invert_matrix(&inv, ctm))
return;
fz_transform_rect(&s.rect, &inv);
s.rect.x0 -= linewidth;
s.rect.x1 += linewidth;
s.rect.y0 -= linewidth;
s.rect.y1 += linewidth;
max_expand = fz_matrix_max_expansion(ctm);
if (phase_len < 1.0f && phase_len * max_expand < 0.5f)
{
fz_flatten_stroke_path(gel, path, stroke, ctm, flatness, linewidth);
return;
}
s.dash_total = phase_len;
/* cf. http://git.ghostscript.com/?p=mupdf.git;a=commitdiff;h=fd54bf89f2adfd5545202a6df87076fb7269f62c */
s.dash_phase = fmodf(s.dash_phase, s.dash_total);
p0.x = p0.y = 0;
i = k = 0;
while (i < path->cmd_len)
{
switch (path->cmds[i++])
{
case FZ_MOVETO:
p1.x = path->coords[k++];
p1.y = path->coords[k++];
fz_dash_moveto(&s, p1, stroke->start_cap, stroke->end_cap);
beg = p0 = p1;
break;
case FZ_LINETO:
p1.x = path->coords[k++];
p1.y = path->coords[k++];
fz_dash_lineto(&s, p1, stroke->dash_cap, 0);
p0 = p1;
break;
case FZ_CURVETO:
p1.x = path->coords[k++];
p1.y = path->coords[k++];
p2.x = path->coords[k++];
p2.y = path->coords[k++];
p3.x = path->coords[k++];
p3.y = path->coords[k++];
fz_dash_bezier(&s, p0.x, p0.y, p1.x, p1.y, p2.x, p2.y, p3.x, p3.y, 0, stroke->dash_cap);
p0 = p3;
break;
case FZ_CLOSE_PATH:
fz_dash_lineto(&s, beg, stroke->dash_cap, 0);
p0 = p1 = beg;
break;
}
}
fz_stroke_flush(&s, s.cap, stroke->end_cap);
}
