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/*
* Copyright © 2002 University of Southern California
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of the
* University of Southern California not be used in advertising or
* publicity pertaining to distribution of the software without
* specific, written prior permission. The University of Southern
* California makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without express
* or implied warranty.
*
* THE UNIVERSITY OF SOUTHERN CALIFORNIA DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL THE UNIVERSITY OF
* SOUTHERN CALIFORNIA BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: Carl D. Worth <cworth@isi.edu>
*/
#include "cairoint.h"
typedef struct cairo_filler {
cairo_gstate_t *gstate;
cairo_traps_t *traps;
cairo_polygon_t polygon;
} cairo_filler_t;
static void
_cairo_filler_init (cairo_filler_t *filler, cairo_gstate_t *gstate, cairo_traps_t *traps);
static void
_cairo_filler_fini (cairo_filler_t *filler);
static cairo_status_t
_cairo_filler_add_edge (void *closure, cairo_point_t *p1, cairo_point_t *p2);
static cairo_status_t
_cairo_filler_add_spline (void *closure,
cairo_point_t *a, cairo_point_t *b,
cairo_point_t *c, cairo_point_t *d);
static cairo_status_t
_cairo_filler_done_sub_path (void *closure, cairo_sub_path_done_t done);
static cairo_status_t
_cairo_filler_done_path (void *closure);
static void
_cairo_filler_init (cairo_filler_t *filler, cairo_gstate_t *gstate, cairo_traps_t *traps)
{
filler->gstate = gstate;
filler->traps = traps;
_cairo_polygon_init (&filler->polygon);
}
static void
_cairo_filler_fini (cairo_filler_t *filler)
{
_cairo_polygon_fini (&filler->polygon);
}
static cairo_status_t
_cairo_filler_add_edge (void *closure, cairo_point_t *p1, cairo_point_t *p2)
{
cairo_filler_t *filler = closure;
cairo_polygon_t *polygon = &filler->polygon;
return _cairo_polygon_add_edge (polygon, p1, p2);
}
static cairo_status_t
_cairo_filler_add_spline (void *closure,
cairo_point_t *a, cairo_point_t *b,
cairo_point_t *c, cairo_point_t *d)
{
int i;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
cairo_filler_t *filler = closure;
cairo_polygon_t *polygon = &filler->polygon;
cairo_gstate_t *gstate = filler->gstate;
cairo_spline_t spline;
status = _cairo_spline_init (&spline, a, b, c, d);
if (status == CAIRO_INT_STATUS_DEGENERATE)
return CAIRO_STATUS_SUCCESS;
_cairo_spline_decompose (&spline, gstate->tolerance);
if (status)
goto CLEANUP_SPLINE;
for (i = 0; i < spline.num_points - 1; i++) {
status = _cairo_polygon_add_edge (polygon, &spline.points[i], &spline.points[i+1]);
if (status)
goto CLEANUP_SPLINE;
}
CLEANUP_SPLINE:
_cairo_spline_fini (&spline);
return status;
}
static cairo_status_t
_cairo_filler_done_sub_path (void *closure, cairo_sub_path_done_t done)
{
cairo_status_t status = CAIRO_STATUS_SUCCESS;
cairo_filler_t *filler = closure;
cairo_polygon_t *polygon = &filler->polygon;
_cairo_polygon_close (polygon);
return status;
}
static cairo_status_t
_cairo_filler_done_path (void *closure)
{
cairo_filler_t *filler = closure;
return _cairo_traps_tessellate_polygon (filler->traps,
&filler->polygon,
filler->gstate->fill_rule);
}
cairo_status_t
_cairo_path_fill_to_traps (cairo_path_t *path, cairo_gstate_t *gstate, cairo_traps_t *traps)
{
static const cairo_path_callbacks_t filler_callbacks = {
_cairo_filler_add_edge,
_cairo_filler_add_spline,
_cairo_filler_done_sub_path,
_cairo_filler_done_path
};
cairo_status_t status;
cairo_filler_t filler;
_cairo_filler_init (&filler, gstate, traps);
status = _cairo_path_interpret (path,
CAIRO_DIRECTION_FORWARD,
&filler_callbacks, &filler);
if (status) {
_cairo_filler_fini (&filler);
return status;
}
_cairo_filler_fini (&filler);
return CAIRO_STATUS_SUCCESS;
}
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