source/libs/cairo/cairo-src/src/cairo-xlib-fallback-compositor.c

   1 /* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
   2 /* cairo - a vector graphics library with display and print output
   3  *
   4  * Copyright © 2002 University of Southern California
   5  * Copyright © 2005 Red Hat, Inc.
   6  * Copyright © 2011 Intel Corporation
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it either under the terms of the GNU Lesser General Public
  10  * License version 2.1 as published by the Free Software Foundation
  11  * (the "LGPL") or, at your option, under the terms of the Mozilla
  12  * Public License Version 1.1 (the "MPL"). If you do not alter this
  13  * notice, a recipient may use your version of this file under either
  14  * the MPL or the LGPL.
  15  *
  16  * You should have received a copy of the LGPL along with this library
  17  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
  19  * You should have received a copy of the MPL along with this library
  20  * in the file COPYING-MPL-1.1
  21  *
  22  * The contents of this file are subject to the Mozilla Public License
  23  * Version 1.1 (the "License"); you may not use this file except in
  24  * compliance with the License. You may obtain a copy of the License at
  25  * http://www.mozilla.org/MPL/
  26  *
  27  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  28  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  29  * the specific language governing rights and limitations.
  30  *
  31  * The Original Code is the cairo graphics library.
  32  *
  33  * The Initial Developer of the Original Code is University of Southern
  34  * California.
  35  *
  36  * Contributor(s):
  37  *      Carl D. Worth <cworth@cworth.org>
  38  *      Behdad Esfahbod <behdad@behdad.org>
  39  *      Chris Wilson <chris@chris-wilson.co.uk>
  40  *      Karl Tomlinson <karlt+@karlt.net>, Mozilla Corporation
  41  */
  42
  43 #include "cairoint.h"
  44
  45 #if !CAIRO_HAS_XLIB_XCB_FUNCTIONS
  46
  47 #include "cairo-xlib-private.h"
  48
  49 #include "cairo-compositor-private.h"
  50 #include "cairo-image-surface-private.h"
  51 #include "cairo-surface-offset-private.h"
  52
  53 static const cairo_compositor_t *
  54 _get_compositor (cairo_surface_t *surface)
  55 {
  56     return ((cairo_image_surface_t *)surface)->compositor;
  57 }
  58
  59 static cairo_bool_t
  60 unclipped (cairo_xlib_surface_t *xlib, cairo_clip_t *clip)
  61 {
  62     cairo_rectangle_int_t r;
  63
  64     r.x = r.y = 0;
  65     r.width = xlib->width;
  66     r.height = xlib->height;
  67     return _cairo_clip_contains_rectangle (clip, &r);
  68 }
  69
  70 static cairo_int_status_t
  71 _cairo_xlib_shm_compositor_paint (const cairo_compositor_t      *_compositor,
  72                                   cairo_composite_rectangles_t  *extents)
  73 {
  74     cairo_xlib_surface_t *xlib = (cairo_xlib_surface_t *)extents->surface;
  75     cairo_int_status_t status;
  76     cairo_surface_t *shm;
  77     cairo_bool_t overwrite;
  78
  79     TRACE ((stderr, "%s\n", __FUNCTION__));
  80
  81     overwrite =
  82         extents->op <= CAIRO_OPERATOR_SOURCE && unclipped (xlib, extents->clip);
  83
  84     shm = _cairo_xlib_surface_get_shm (xlib, overwrite);
  85     if (shm == NULL)
  86         return CAIRO_INT_STATUS_UNSUPPORTED;
  87
  88     status = _cairo_compositor_paint (_get_compositor (shm), shm,
  89                                       extents->op,
  90                                       &extents->source_pattern.base,
  91                                       extents->clip);
  92     if (unlikely (status))
  93         return status;
  94
  95     xlib->base.is_clear =
  96         extents->op == CAIRO_OPERATOR_CLEAR && unclipped (xlib, extents->clip);
  97     xlib->base.serial++;
  98     xlib->fallback++;
  99     return CAIRO_INT_STATUS_NOTHING_TO_DO;
 100 }
 101
 102 static cairo_int_status_t
 103 _cairo_xlib_shm_compositor_mask (const cairo_compositor_t       *_compositor,
 104                                  cairo_composite_rectangles_t   *extents)
 105 {
 106     cairo_xlib_surface_t *xlib = (cairo_xlib_surface_t *)extents->surface;
 107     cairo_int_status_t status;
 108     cairo_surface_t *shm;
 109
 110     TRACE ((stderr, "%s\n", __FUNCTION__));
 111
 112     shm = _cairo_xlib_surface_get_shm (xlib, FALSE);
 113     if (shm == NULL)
 114         return CAIRO_INT_STATUS_UNSUPPORTED;
 115
 116     status = _cairo_compositor_mask (_get_compositor (shm), shm,
 117                                      extents->op,
 118                                      &extents->source_pattern.base,
 119                                      &extents->mask_pattern.base,
 120                                      extents->clip);
 121     if (unlikely (status))
 122         return status;
 123
 124     xlib->base.is_clear = FALSE;
 125     xlib->base.serial++;
 126     xlib->fallback++;
 127     return CAIRO_INT_STATUS_NOTHING_TO_DO;
 128 }
 129
 130 static cairo_int_status_t
 131 _cairo_xlib_shm_compositor_stroke (const cairo_compositor_t     *_compositor,
 132                                    cairo_composite_rectangles_t *extents,
 133                                    const cairo_path_fixed_t     *path,
 134                                    const cairo_stroke_style_t   *style,
 135                                    const cairo_matrix_t         *ctm,
 136                                    const cairo_matrix_t         *ctm_inverse,
 137                                    double                        tolerance,
 138                                    cairo_antialias_t             antialias)
 139 {
 140     cairo_xlib_surface_t *xlib = (cairo_xlib_surface_t *)extents->surface;
 141     cairo_int_status_t status;
 142     cairo_surface_t *shm;
 143
 144     TRACE ((stderr, "%s\n", __FUNCTION__));
 145
 146     shm = _cairo_xlib_surface_get_shm (xlib, FALSE);
 147     if (shm == NULL)
 148         return CAIRO_INT_STATUS_UNSUPPORTED;
 149
 150     status = _cairo_compositor_stroke (_get_compositor (shm), shm,
 151                                        extents->op,
 152                                        &extents->source_pattern.base,
 153                                        path, style,
 154                                        ctm, ctm_inverse,
 155                                        tolerance,
 156                                        antialias,
 157                                        extents->clip);
 158     if (unlikely (status))
 159         return status;
 160
 161     xlib->base.is_clear = FALSE;
 162     xlib->base.serial++;
 163     xlib->fallback++;
 164     return CAIRO_INT_STATUS_NOTHING_TO_DO;
 165 }
 166
 167 static cairo_int_status_t
 168 _cairo_xlib_shm_compositor_fill (const cairo_compositor_t       *_compositor,
 169                                  cairo_composite_rectangles_t *extents,
 170                                  const cairo_path_fixed_t       *path,
 171                                  cairo_fill_rule_t               fill_rule,
 172                                  double                          tolerance,
 173                                  cairo_antialias_t               antialias)
 174 {
 175     cairo_xlib_surface_t *xlib = (cairo_xlib_surface_t *)extents->surface;
 176     cairo_int_status_t status;
 177     cairo_surface_t *shm;
 178
 179     TRACE ((stderr, "%s\n", __FUNCTION__));
 180
 181     shm = _cairo_xlib_surface_get_shm (xlib, FALSE);
 182     if (shm == NULL)
 183         return CAIRO_INT_STATUS_UNSUPPORTED;
 184
 185     status = _cairo_compositor_fill (_get_compositor (shm), shm,
 186                                      extents->op,
 187                                      &extents->source_pattern.base,
 188                                      path,
 189                                      fill_rule, tolerance, antialias,
 190                                      extents->clip);
 191     if (unlikely (status))
 192         return status;
 193
 194     xlib->base.is_clear = FALSE;
 195     xlib->base.serial++;
 196     xlib->fallback++;
 197     return CAIRO_INT_STATUS_NOTHING_TO_DO;
 198 }
 199
 200 static cairo_int_status_t
 201 _cairo_xlib_shm_compositor_glyphs (const cairo_compositor_t     *_compositor,
 202                                    cairo_composite_rectangles_t *extents,
 203                                    cairo_scaled_font_t          *scaled_font,
 204                                    cairo_glyph_t                *glyphs,
 205                                    int                           num_glyphs,
 206                                    cairo_bool_t                  overlap)
 207 {
 208     cairo_xlib_surface_t *xlib = (cairo_xlib_surface_t *)extents->surface;
 209     cairo_int_status_t status;
 210     cairo_surface_t *shm;
 211
 212     TRACE ((stderr, "%s\n", __FUNCTION__));
 213
 214     shm = _cairo_xlib_surface_get_shm (xlib, FALSE);
 215     if (shm == NULL)
 216         return CAIRO_INT_STATUS_UNSUPPORTED;
 217
 218     status = _cairo_compositor_glyphs (_get_compositor (shm), shm,
 219                                        extents->op,
 220                                        &extents->source_pattern.base,
 221                                        glyphs, num_glyphs, scaled_font,
 222                                        extents->clip);
 223     if (unlikely (status))
 224         return status;
 225
 226     xlib->base.is_clear = FALSE;
 227     xlib->base.serial++;
 228     xlib->fallback++;
 229     return CAIRO_INT_STATUS_NOTHING_TO_DO;
 230 }
 231
 232 static const cairo_compositor_t _cairo_xlib_shm_compositor = {
 233      &_cairo_fallback_compositor,
 234
 235      _cairo_xlib_shm_compositor_paint,
 236      _cairo_xlib_shm_compositor_mask,
 237      _cairo_xlib_shm_compositor_stroke,
 238      _cairo_xlib_shm_compositor_fill,
 239      _cairo_xlib_shm_compositor_glyphs,
 240 };
 241
 242 const cairo_compositor_t *
 243 _cairo_xlib_fallback_compositor_get (void)
 244 {
 245     return &_cairo_xlib_shm_compositor;
 246 }
 247
 248 #endif /* !CAIRO_HAS_XLIB_XCB_FUNCTIONS */