cairo-surface-clipper.c [plain text]
#include "cairoint.h"
#include "cairo-surface-clipper-private.h"
static cairo_status_t
_cairo_surface_clipper_intersect_clip_path_recursive (cairo_surface_clipper_t *clipper,
cairo_clip_path_t *clip_path)
{
cairo_status_t status;
if (clip_path->prev != NULL) {
status =
_cairo_surface_clipper_intersect_clip_path_recursive (clipper,
clip_path->prev);
if (unlikely (status))
return status;
}
return clipper->intersect_clip_path (clipper,
&clip_path->path,
clip_path->fill_rule,
clip_path->tolerance,
clip_path->antialias);
}
cairo_status_t
_cairo_surface_clipper_set_clip (cairo_surface_clipper_t *clipper,
cairo_clip_t *clip)
{
cairo_status_t status;
cairo_bool_t clear;
if (clip == NULL && clipper->clip.path == NULL)
return CAIRO_STATUS_SUCCESS;
if (clip != NULL && clipper->clip.path != NULL &&
_cairo_clip_equal (clip, &clipper->clip))
{
return CAIRO_STATUS_SUCCESS;
}
assert (clip == NULL || clip->path != NULL);
clear = clip == NULL || clip->path->prev != clipper->clip.path;
_cairo_clip_reset (&clipper->clip);
_cairo_clip_init_copy (&clipper->clip, clip);
if (clear) {
clipper->is_clipped = FALSE;
status = clipper->intersect_clip_path (clipper, NULL, 0, 0, 0);
if (unlikely (status))
return status;
if (clip != NULL && clip->path != NULL) {
status =
_cairo_surface_clipper_intersect_clip_path_recursive (clipper,
clip->path);
clipper->is_clipped = TRUE;
}
} else {
cairo_clip_path_t *path = clip->path;
clipper->is_clipped = TRUE;
status = clipper->intersect_clip_path (clipper,
&path->path,
path->fill_rule,
path->tolerance,
path->antialias);
}
return status;
}
void
_cairo_surface_clipper_init (cairo_surface_clipper_t *clipper,
cairo_surface_clipper_intersect_clip_path_func_t func)
{
_cairo_clip_init (&clipper->clip);
clipper->is_clipped = FALSE;
clipper->intersect_clip_path = func;
}
void
_cairo_surface_clipper_reset (cairo_surface_clipper_t *clipper)
{
_cairo_clip_reset (&clipper->clip);
clipper->is_clipped = FALSE;
}