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#include "fitz.h"
fz_path *
fz_newpath(void)
{
fz_path *path;
path = fz_malloc(sizeof(fz_path));
path->len = 0;
path->cap = 0;
path->els = nil;
return path;
}
fz_path *
fz_clonepath(fz_path *old)
{
fz_path *path;
path = fz_malloc(sizeof(fz_path));
path->len = old->len;
path->cap = old->len;
path->els = fz_calloc(path->cap, sizeof(fz_pathel));
memcpy(path->els, old->els, sizeof(fz_pathel) * path->len);
return path;
}
void
fz_freepath(fz_path *path)
{
fz_free(path->els);
fz_free(path);
}
static void
growpath(fz_path *path, int n)
{
if (path->len + n < path->cap)
return;
while (path->len + n > path->cap)
path->cap = path->cap + 36;
path->els = fz_realloc(path->els, path->cap, sizeof(fz_pathel));
}
void
fz_moveto(fz_path *path, float x, float y)
{
growpath(path, 3);
path->els[path->len++].k = FZ_MOVETO;
path->els[path->len++].v = x;
path->els[path->len++].v = y;
}
void
fz_lineto(fz_path *path, float x, float y)
{
if (path->len == 0)
fz_moveto(path, 0, 0);
growpath(path, 3);
path->els[path->len++].k = FZ_LINETO;
path->els[path->len++].v = x;
path->els[path->len++].v = y;
}
void
fz_curveto(fz_path *path,
float x1, float y1,
float x2, float y2,
float x3, float y3)
{
if (path->len == 0)
fz_moveto(path, 0, 0);
growpath(path, 7);
path->els[path->len++].k = FZ_CURVETO;
path->els[path->len++].v = x1;
path->els[path->len++].v = y1;
path->els[path->len++].v = x2;
path->els[path->len++].v = y2;
path->els[path->len++].v = x3;
path->els[path->len++].v = y3;
}
void
fz_curvetov(fz_path *path, float x2, float y2, float x3, float y3)
{
float x1 = path->els[path->len-2].v;
float y1 = path->els[path->len-1].v;
fz_curveto(path, x1, y1, x2, y2, x3, y3);
}
void
fz_curvetoy(fz_path *path, float x1, float y1, float x3, float y3)
{
fz_curveto(path, x1, y1, x3, y3, x3, y3);
}
void
fz_closepath(fz_path *path)
{
if (path->len == 0)
return;
growpath(path, 1);
path->els[path->len++].k = FZ_CLOSEPATH;
}
static inline fz_rect boundexpand(fz_rect r, fz_point p)
{
if (p.x < r.x0) r.x0 = p.x;
if (p.y < r.y0) r.y0 = p.y;
if (p.x > r.x1) r.x1 = p.x;
if (p.y > r.y1) r.y1 = p.y;
return r;
}
fz_rect
fz_boundpath(fz_path *path, fz_strokestate *stroke, fz_matrix ctm)
{
fz_point p;
fz_rect r = fz_emptyrect;
int i = 0;
if (path->len)
{
p.x = path->els[1].v;
p.y = path->els[2].v;
p = fz_transformpoint(ctm, p);
r.x0 = r.x1 = p.x;
r.y0 = r.y1 = p.y;
}
while (i < path->len)
{
switch (path->els[i++].k)
{
case FZ_CURVETO:
p.x = path->els[i++].v;
p.y = path->els[i++].v;
r = boundexpand(r, fz_transformpoint(ctm, p));
p.x = path->els[i++].v;
p.y = path->els[i++].v;
r = boundexpand(r, fz_transformpoint(ctm, p));
p.x = path->els[i++].v;
p.y = path->els[i++].v;
r = boundexpand(r, fz_transformpoint(ctm, p));
break;
case FZ_MOVETO:
case FZ_LINETO:
p.x = path->els[i++].v;
p.y = path->els[i++].v;
r = boundexpand(r, fz_transformpoint(ctm, p));
break;
case FZ_CLOSEPATH:
break;
}
}
if (stroke)
{
float miterlength = sinf(stroke->miterlimit * 0.5f);
float linewidth = stroke->linewidth;
float expand = MAX(miterlength, linewidth) * 0.5f;
r.x0 -= expand;
r.y0 -= expand;
r.x1 += expand;
r.y1 += expand;
}
return r;
}
void
fz_transformpath(fz_path *path, fz_matrix ctm)
{
fz_point p;
int k, i = 0;
while (i < path->len)
{
switch (path->els[i++].k)
{
case FZ_CURVETO:
for (k = 0; k < 3; k++)
{
p.x = path->els[i].v;
p.y = path->els[i+1].v;
p = fz_transformpoint(ctm, p);
path->els[i].v = p.x;
path->els[i+1].v = p.y;
i += 2;
}
break;
case FZ_MOVETO:
case FZ_LINETO:
p.x = path->els[i].v;
p.y = path->els[i+1].v;
p = fz_transformpoint(ctm, p);
path->els[i].v = p.x;
path->els[i+1].v = p.y;
i += 2;
break;
case FZ_CLOSEPATH:
break;
}
}
}
void
fz_debugpath(fz_path *path, int indent)
{
float x, y;
int i = 0;
int n;
while (i < path->len)
{
for (n = 0; n < indent; n++)
putchar(' ');
switch (path->els[i++].k)
{
case FZ_MOVETO:
x = path->els[i++].v;
y = path->els[i++].v;
printf("%g %g m\n", x, y);
break;
case FZ_LINETO:
x = path->els[i++].v;
y = path->els[i++].v;
printf("%g %g l\n", x, y);
break;
case FZ_CURVETO:
x = path->els[i++].v;
y = path->els[i++].v;
printf("%g %g ", x, y);
x = path->els[i++].v;
y = path->els[i++].v;
printf("%g %g ", x, y);
x = path->els[i++].v;
y = path->els[i++].v;
printf("%g %g c\n", x, y);
break;
case FZ_CLOSEPATH:
printf("h\n");
break;
}
}
}
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