LCOV - code coverage report
Current view: directory - gfx/cairo/cairo/src - cairo-surface-clipper.c (source / functions) Found Hit Coverage
Test: app.info Lines: 39 0 0.0 %
Date: 2012-06-02 Functions: 4 0 0.0 %

       1                 : /* cairo - a vector graphics library with display and print output
       2                 :  *
       3                 :  * Copyright © 2009 Chris Wilson
       4                 :  *
       5                 :  * This library is free software; you can redistribute it and/or
       6                 :  * modify it either under the terms of the GNU Lesser General Public
       7                 :  * License version 2.1 as published by the Free Software Foundation
       8                 :  * (the "LGPL") or, at your option, under the terms of the Mozilla
       9                 :  * Public License Version 1.1 (the "MPL"). If you do not alter this
      10                 :  * notice, a recipient may use your version of this file under either
      11                 :  * the MPL or the LGPL.
      12                 :  *
      13                 :  * You should have received a copy of the LGPL along with this library
      14                 :  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
      15                 :  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
      16                 :  * You should have received a copy of the MPL along with this library
      17                 :  * in the file COPYING-MPL-1.1
      18                 :  *
      19                 :  * The contents of this file are subject to the Mozilla Public License
      20                 :  * Version 1.1 (the "License"); you may not use this file except in
      21                 :  * compliance with the License. You may obtain a copy of the License at
      22                 :  * http://www.mozilla.org/MPL/
      23                 :  *
      24                 :  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
      25                 :  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
      26                 :  * the specific language governing rights and limitations.
      27                 :  *
      28                 :  * The Original Code is the cairo graphics library.
      29                 :  *
      30                 :  * The Initial Developer of the Original Code is Red Hat, Inc.
      31                 :  *
      32                 :  * Contributor(s):
      33                 :  *      Chris Wilson <chris@chris-wilson.co.uk>
      34                 :  */
      35                 : 
      36                 : #include "cairoint.h"
      37                 : 
      38                 : #include "cairo-surface-clipper-private.h"
      39                 : 
      40                 : /* A collection of routines to facilitate vector surface clipping */
      41                 : 
      42                 : static cairo_status_t
      43               0 : _cairo_surface_clipper_intersect_clip_path_recursive (cairo_surface_clipper_t *clipper,
      44                 :                                                       cairo_clip_path_t *clip_path)
      45                 : {
      46                 :     cairo_status_t status;
      47                 : 
      48               0 :     if (clip_path->prev != NULL) {
      49               0 :         status =
      50               0 :             _cairo_surface_clipper_intersect_clip_path_recursive (clipper,
      51                 :                                                                   clip_path->prev);
      52               0 :         if (unlikely (status))
      53               0 :             return status;
      54                 :     }
      55                 : 
      56               0 :     return clipper->intersect_clip_path (clipper,
      57                 :                                          &clip_path->path,
      58                 :                                          clip_path->fill_rule,
      59                 :                                          clip_path->tolerance,
      60                 :                                          clip_path->antialias);
      61                 : }
      62                 : 
      63                 : cairo_status_t
      64               0 : _cairo_surface_clipper_set_clip (cairo_surface_clipper_t *clipper,
      65                 :                                  cairo_clip_t *clip)
      66                 : {
      67                 :     cairo_status_t status;
      68                 :     cairo_bool_t clear;
      69                 : 
      70                 :     /* XXX as we cache a reference to the path, and compare every time,
      71                 :      * we may in future need to install a notification if the clip->path
      72                 :      * is every modified (e.g. cairo_clip_translate).
      73                 :      */
      74                 : 
      75               0 :     if (clip == NULL && clipper->clip.path == NULL)
      76               0 :         return CAIRO_STATUS_SUCCESS;
      77                 : 
      78               0 :     if (clip != NULL && clipper->clip.path != NULL &&
      79               0 :         _cairo_clip_equal (clip, &clipper->clip))
      80                 :     {
      81               0 :         return CAIRO_STATUS_SUCCESS;
      82                 :     }
      83                 : 
      84                 :     /* all clipped out state should never propagate this far */
      85               0 :     assert (clip == NULL || clip->path != NULL);
      86                 : 
      87                 :     /* Check whether this clip is a continuation of the previous.
      88                 :      * If not, we have to remove the current clip and rebuild.
      89                 :      */
      90               0 :     clear = clip == NULL || clip->path->prev != clipper->clip.path;
      91                 : 
      92               0 :     _cairo_clip_reset (&clipper->clip);
      93               0 :     _cairo_clip_init_copy (&clipper->clip, clip);
      94                 : 
      95               0 :     if (clear) {
      96               0 :         clipper->is_clipped = FALSE;
      97               0 :         status = clipper->intersect_clip_path (clipper, NULL, 0, 0, 0);
      98               0 :         if (unlikely (status))
      99               0 :             return status;
     100                 : 
     101               0 :         if (clip != NULL && clip->path != NULL) {
     102               0 :             status =
     103               0 :                 _cairo_surface_clipper_intersect_clip_path_recursive (clipper,
     104                 :                                                                       clip->path);
     105               0 :             clipper->is_clipped = TRUE;
     106                 :         }
     107                 :     } else {
     108               0 :         cairo_clip_path_t *path = clip->path;
     109                 : 
     110               0 :         clipper->is_clipped = TRUE;
     111               0 :         status = clipper->intersect_clip_path (clipper,
     112                 :                                                &path->path,
     113                 :                                                path->fill_rule,
     114                 :                                                path->tolerance,
     115                 :                                                path->antialias);
     116                 :     }
     117                 : 
     118               0 :     return status;
     119                 : }
     120                 : 
     121                 : void
     122               0 : _cairo_surface_clipper_init (cairo_surface_clipper_t *clipper,
     123                 :                              cairo_surface_clipper_intersect_clip_path_func_t func)
     124                 : {
     125               0 :     _cairo_clip_init (&clipper->clip);
     126               0 :     clipper->is_clipped = FALSE;
     127               0 :     clipper->intersect_clip_path = func;
     128               0 : }
     129                 : 
     130                 : void
     131               0 : _cairo_surface_clipper_reset (cairo_surface_clipper_t *clipper)
     132                 : {
     133               0 :     _cairo_clip_reset (&clipper->clip);
     134               0 :     clipper->is_clipped = FALSE;
     135               0 : }

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