LCOV - code coverage report
Current view: directory - gfx/cairo/cairo/src - cairo-composite-rectangles.c (source / functions) Found Hit Coverage
Test: app.info Lines: 47 12 25.5 %
Date: 2012-06-02 Functions: 7 2 28.6 %

       1                 : /* cairo - a vector graphics library with display and print output
       2                 :  *
       3                 :  * Copyright © 2009 Intel Corporation
       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-error-private.h"
      39                 : #include "cairo-composite-rectangles-private.h"
      40                 : 
      41                 : /* A collection of routines to facilitate writing compositors. */
      42                 : 
      43                 : static inline cairo_bool_t
      44              64 : _cairo_composite_rectangles_init (cairo_composite_rectangles_t *extents,
      45                 :                                   const cairo_rectangle_int_t *surface_extents,
      46                 :                                   cairo_operator_t op,
      47                 :                                   const cairo_pattern_t *source,
      48                 :                                   cairo_clip_t *clip)
      49                 : {
      50              64 :     extents->unbounded = *surface_extents;
      51                 : 
      52              64 :     if (clip != NULL) {
      53                 :         const cairo_rectangle_int_t *clip_extents;
      54                 : 
      55               0 :         clip_extents = _cairo_clip_get_extents (clip);
      56               0 :         if (clip_extents == NULL)
      57               0 :             return FALSE;
      58                 : 
      59               0 :         if (! _cairo_rectangle_intersect (&extents->unbounded, clip_extents))
      60               0 :             return FALSE;
      61                 :     }
      62                 : 
      63              64 :     extents->bounded = extents->unbounded;
      64              64 :     extents->is_bounded = _cairo_operator_bounded_by_either (op);
      65                 : 
      66              64 :     _cairo_pattern_get_extents (source, &extents->source);
      67              64 :     if (extents->is_bounded & CAIRO_OPERATOR_BOUND_BY_SOURCE) {
      68               0 :         if (! _cairo_rectangle_intersect (&extents->bounded, &extents->source))
      69               0 :             return FALSE;
      70                 :     }
      71                 : 
      72              64 :     return TRUE;
      73                 : }
      74                 : 
      75                 : cairo_int_status_t
      76              64 : _cairo_composite_rectangles_init_for_paint (cairo_composite_rectangles_t *extents,
      77                 :                                             const cairo_rectangle_int_t *surface_extents,
      78                 :                                             cairo_operator_t             op,
      79                 :                                             const cairo_pattern_t       *source,
      80                 :                                             cairo_clip_t                *clip)
      81                 : {
      82              64 :     if (! _cairo_composite_rectangles_init (extents,
      83                 :                                             surface_extents,
      84                 :                                             op, source, clip))
      85                 :     {
      86               0 :         return CAIRO_INT_STATUS_NOTHING_TO_DO;
      87                 :     }
      88                 : 
      89              64 :     extents->mask = extents->bounded;
      90              64 :     return CAIRO_STATUS_SUCCESS;
      91                 : }
      92                 : 
      93                 : static cairo_int_status_t
      94               0 : _cairo_composite_rectangles_intersect (cairo_composite_rectangles_t *extents)
      95                 : {
      96                 :     cairo_bool_t ret;
      97                 : 
      98               0 :     ret = _cairo_rectangle_intersect (&extents->bounded, &extents->mask);
      99               0 :     if (! ret && extents->is_bounded & CAIRO_OPERATOR_BOUND_BY_MASK)
     100               0 :         return CAIRO_INT_STATUS_NOTHING_TO_DO;
     101                 : 
     102               0 :     return CAIRO_STATUS_SUCCESS;
     103                 : }
     104                 : 
     105                 : cairo_int_status_t
     106               0 : _cairo_composite_rectangles_init_for_mask (cairo_composite_rectangles_t *extents,
     107                 :                                            const cairo_rectangle_int_t *surface_extents,
     108                 :                                            cairo_operator_t              op,
     109                 :                                            const cairo_pattern_t        *source,
     110                 :                                            const cairo_pattern_t        *mask,
     111                 :                                            cairo_clip_t                 *clip)
     112                 : {
     113               0 :     if (! _cairo_composite_rectangles_init (extents,
     114                 :                                             surface_extents,
     115                 :                                             op, source, clip))
     116                 :     {
     117               0 :         return CAIRO_INT_STATUS_NOTHING_TO_DO;
     118                 :     }
     119                 : 
     120               0 :     _cairo_pattern_get_extents (mask, &extents->mask);
     121                 : 
     122               0 :     return _cairo_composite_rectangles_intersect (extents);
     123                 : }
     124                 : 
     125                 : cairo_int_status_t
     126               0 : _cairo_composite_rectangles_init_for_stroke (cairo_composite_rectangles_t *extents,
     127                 :                                              const cairo_rectangle_int_t *surface_extents,
     128                 :                                              cairo_operator_t            op,
     129                 :                                              const cairo_pattern_t      *source,
     130                 :                                              cairo_path_fixed_t         *path,
     131                 :                                              const cairo_stroke_style_t *style,
     132                 :                                              const cairo_matrix_t       *ctm,
     133                 :                                              cairo_clip_t               *clip)
     134                 : {
     135               0 :     if (! _cairo_composite_rectangles_init (extents,
     136                 :                                             surface_extents,
     137                 :                                             op, source, clip))
     138                 :     {
     139               0 :         return CAIRO_INT_STATUS_NOTHING_TO_DO;
     140                 :     }
     141                 : 
     142               0 :     _cairo_path_fixed_approximate_stroke_extents (path, style, ctm, &extents->mask);
     143                 : 
     144               0 :     return _cairo_composite_rectangles_intersect (extents);
     145                 : }
     146                 : 
     147                 : cairo_int_status_t
     148               0 : _cairo_composite_rectangles_init_for_fill (cairo_composite_rectangles_t *extents,
     149                 :                                            const cairo_rectangle_int_t *surface_extents,
     150                 :                                            cairo_operator_t              op,
     151                 :                                            const cairo_pattern_t        *source,
     152                 :                                            cairo_path_fixed_t           *path,
     153                 :                                            cairo_clip_t                 *clip)
     154                 : {
     155               0 :     if (! _cairo_composite_rectangles_init (extents,
     156                 :                                             surface_extents,
     157                 :                                             op, source, clip))
     158                 :     {
     159               0 :         return CAIRO_INT_STATUS_NOTHING_TO_DO;
     160                 :     }
     161                 : 
     162               0 :     _cairo_path_fixed_approximate_fill_extents (path, &extents->mask);
     163                 : 
     164               0 :     return _cairo_composite_rectangles_intersect (extents);
     165                 : }
     166                 : 
     167                 : cairo_int_status_t
     168               0 : _cairo_composite_rectangles_init_for_glyphs (cairo_composite_rectangles_t *extents,
     169                 :                                              const cairo_rectangle_int_t *surface_extents,
     170                 :                                              cairo_operator_t            op,
     171                 :                                              const cairo_pattern_t      *source,
     172                 :                                              cairo_scaled_font_t        *scaled_font,
     173                 :                                              cairo_glyph_t              *glyphs,
     174                 :                                              int                         num_glyphs,
     175                 :                                              cairo_clip_t               *clip,
     176                 :                                              cairo_bool_t               *overlap)
     177                 : {
     178                 :     cairo_status_t status;
     179                 : 
     180               0 :     if (! _cairo_composite_rectangles_init (extents,
     181                 :                                             surface_extents,
     182                 :                                             op, source, clip))
     183                 :     {
     184               0 :         return CAIRO_INT_STATUS_NOTHING_TO_DO;
     185                 :     }
     186                 : 
     187               0 :     status = _cairo_scaled_font_glyph_device_extents (scaled_font,
     188                 :                                                       glyphs, num_glyphs,
     189                 :                                                       &extents->mask,
     190                 :                                                       overlap);
     191               0 :     if (unlikely (status))
     192               0 :         return status;
     193                 : 
     194               0 :     return _cairo_composite_rectangles_intersect (extents);
     195                 : }

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