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

   1 /* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
   2 /* cairo - a vector graphics library with display and print output
   3  *
   4  * Copyright © 2011 Intel Corporation
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it either under the terms of the GNU Lesser General Public
   8  * License version 2.1 as published by the Free Software Foundation
   9  * (the "LGPL") or, at your option, under the terms of the Mozilla
  10  * Public License Version 1.1 (the "MPL"). If you do not alter this
  11  * notice, a recipient may use your version of this file under either
  12  * the MPL or the LGPL.
  13  *
  14  * You should have received a copy of the LGPL along with this library
  15  * in the file COPYING-LGPL-2.1; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
  17  * You should have received a copy of the MPL along with this library
  18  * in the file COPYING-MPL-1.1
  19  *
  20  * The contents of this file are subject to the Mozilla Public License
  21  * Version 1.1 (the "License"); you may not use this file except in
  22  * compliance with the License. You may obtain a copy of the License at
  23  * http://www.mozilla.org/MPL/
  24  *
  25  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
  26  * OF ANY KIND, either express or implied. See the LGPL or the MPL for
  27  * the specific language governing rights and limitations.
  28  *
  29  * The Original Code is the cairo graphics library.
  30  *
  31  * The Initial Developer of the Original Code is University of Southern
  32  * California.
  33  *
  34  * Contributor(s):
  35  *      Chris Wilson <chris@chris-wilson.co.uk>
  36  */
  37
  38 #include "cairoint.h"
  39
  40 #include "cairo-compositor-private.h"
  41 #include "cairo-damage-private.h"
  42 #include "cairo-error-private.h"
  43
  44 cairo_int_status_t
  45 _cairo_compositor_paint (const cairo_compositor_t       *compositor,
  46                          cairo_surface_t                *surface,
  47                          cairo_operator_t                op,
  48                          const cairo_pattern_t          *source,
  49                          const cairo_clip_t             *clip)
  50 {
  51     cairo_composite_rectangles_t extents;
  52     cairo_int_status_t status;
  53
  54     TRACE ((stderr, "%s\n", __FUNCTION__));
  55     status = _cairo_composite_rectangles_init_for_paint (&extents, surface,
  56                                                          op, source,
  57                                                          clip);
  58     if (unlikely (status))
  59         return status;
  60
  61     do {
  62         while (compositor->paint == NULL)
  63             compositor = compositor->delegate;
  64
  65         status = compositor->paint (compositor, &extents);
  66
  67         compositor = compositor->delegate;
  68     } while (status == CAIRO_INT_STATUS_UNSUPPORTED);
  69
  70     if (status == CAIRO_INT_STATUS_SUCCESS && surface->damage) {
  71         TRACE ((stderr, "%s: applying damage (%d,%d)x(%d, %d)\n",
  72                 __FUNCTION__,
  73                 extents.unbounded.x, extents.unbounded.y,
  74                 extents.unbounded.width, extents.unbounded.height));
  75         surface->damage = _cairo_damage_add_rectangle (surface->damage,
  76                                                        &extents.unbounded);
  77     }
  78
  79     _cairo_composite_rectangles_fini (&extents);
  80
  81     return status;
  82 }
  83
  84 cairo_int_status_t
  85 _cairo_compositor_mask (const cairo_compositor_t        *compositor,
  86                         cairo_surface_t                 *surface,
  87                         cairo_operator_t                 op,
  88                         const cairo_pattern_t           *source,
  89                         const cairo_pattern_t           *mask,
  90                         const cairo_clip_t              *clip)
  91 {
  92     cairo_composite_rectangles_t extents;
  93     cairo_int_status_t status;
  94
  95     TRACE ((stderr, "%s\n", __FUNCTION__));
  96     status = _cairo_composite_rectangles_init_for_mask (&extents, surface,
  97                                                         op, source, mask,
  98                                                         clip);
  99     if (unlikely (status))
 100         return status;
 101
 102     do {
 103         while (compositor->mask == NULL)
 104             compositor = compositor->delegate;
 105
 106         status = compositor->mask (compositor, &extents);
 107
 108         compositor = compositor->delegate;
 109     } while (status == CAIRO_INT_STATUS_UNSUPPORTED);
 110
 111     if (status == CAIRO_INT_STATUS_SUCCESS && surface->damage) {
 112         TRACE ((stderr, "%s: applying damage (%d,%d)x(%d, %d)\n",
 113                 __FUNCTION__,
 114                 extents.unbounded.x, extents.unbounded.y,
 115                 extents.unbounded.width, extents.unbounded.height));
 116         surface->damage = _cairo_damage_add_rectangle (surface->damage,
 117                                                        &extents.unbounded);
 118     }
 119
 120     _cairo_composite_rectangles_fini (&extents);
 121
 122     return status;
 123 }
 124
 125 cairo_int_status_t
 126 _cairo_compositor_stroke (const cairo_compositor_t      *compositor,
 127                           cairo_surface_t               *surface,
 128                           cairo_operator_t               op,
 129                           const cairo_pattern_t         *source,
 130                           const cairo_path_fixed_t      *path,
 131                           const cairo_stroke_style_t    *style,
 132                           const cairo_matrix_t          *ctm,
 133                           const cairo_matrix_t          *ctm_inverse,
 134                           double                         tolerance,
 135                           cairo_antialias_t              antialias,
 136                           const cairo_clip_t            *clip)
 137 {
 138     cairo_composite_rectangles_t extents;
 139     cairo_int_status_t status;
 140
 141     TRACE ((stderr, "%s\n", __FUNCTION__));
 142
 143     if (_cairo_pen_vertices_needed (tolerance, style->line_width/2, ctm) <= 1)
 144         return CAIRO_INT_STATUS_NOTHING_TO_DO;
 145
 146     status = _cairo_composite_rectangles_init_for_stroke (&extents, surface,
 147                                                           op, source,
 148                                                           path, style, ctm,
 149                                                           clip);
 150     if (unlikely (status))
 151         return status;
 152
 153     do {
 154         while (compositor->stroke == NULL)
 155             compositor = compositor->delegate;
 156
 157         status = compositor->stroke (compositor, &extents,
 158                                      path, style, ctm, ctm_inverse,
 159                                      tolerance, antialias);
 160
 161         compositor = compositor->delegate;
 162     } while (status == CAIRO_INT_STATUS_UNSUPPORTED);
 163
 164     if (status == CAIRO_INT_STATUS_SUCCESS && surface->damage) {
 165         TRACE ((stderr, "%s: applying damage (%d,%d)x(%d, %d)\n",
 166                 __FUNCTION__,
 167                 extents.unbounded.x, extents.unbounded.y,
 168                 extents.unbounded.width, extents.unbounded.height));
 169         surface->damage = _cairo_damage_add_rectangle (surface->damage,
 170                                                        &extents.unbounded);
 171     }
 172
 173     _cairo_composite_rectangles_fini (&extents);
 174
 175     return status;
 176 }
 177
 178 cairo_int_status_t
 179 _cairo_compositor_fill (const cairo_compositor_t        *compositor,
 180                         cairo_surface_t                 *surface,
 181                         cairo_operator_t                 op,
 182                         const cairo_pattern_t           *source,
 183                         const cairo_path_fixed_t        *path,
 184                         cairo_fill_rule_t                fill_rule,
 185                         double                           tolerance,
 186                         cairo_antialias_t                antialias,
 187                         const cairo_clip_t              *clip)
 188 {
 189     cairo_composite_rectangles_t extents;
 190     cairo_int_status_t status;
 191
 192     TRACE ((stderr, "%s\n", __FUNCTION__));
 193     status = _cairo_composite_rectangles_init_for_fill (&extents, surface,
 194                                                         op, source, path,
 195                                                         clip);
 196     if (unlikely (status))
 197         return status;
 198
 199     do {
 200         while (compositor->fill == NULL)
 201             compositor = compositor->delegate;
 202
 203         status = compositor->fill (compositor, &extents,
 204                                    path, fill_rule, tolerance, antialias);
 205
 206         compositor = compositor->delegate;
 207     } while (status == CAIRO_INT_STATUS_UNSUPPORTED);
 208
 209     if (status == CAIRO_INT_STATUS_SUCCESS && surface->damage) {
 210         TRACE ((stderr, "%s: applying damage (%d,%d)x(%d, %d)\n",
 211                 __FUNCTION__,
 212                 extents.unbounded.x, extents.unbounded.y,
 213                 extents.unbounded.width, extents.unbounded.height));
 214         surface->damage = _cairo_damage_add_rectangle (surface->damage,
 215                                                        &extents.unbounded);
 216     }
 217
 218     _cairo_composite_rectangles_fini (&extents);
 219
 220     return status;
 221 }
 222
 223 cairo_int_status_t
 224 _cairo_compositor_glyphs (const cairo_compositor_t              *compositor,
 225                           cairo_surface_t                       *surface,
 226                           cairo_operator_t                       op,
 227                           const cairo_pattern_t                 *source,
 228                           cairo_glyph_t                         *glyphs,
 229                           int                                    num_glyphs,
 230                           cairo_scaled_font_t                   *scaled_font,
 231                           const cairo_clip_t                    *clip)
 232 {
 233     cairo_composite_rectangles_t extents;
 234     cairo_bool_t overlap;
 235     cairo_int_status_t status;
 236
 237     TRACE ((stderr, "%s\n", __FUNCTION__));
 238     status = _cairo_composite_rectangles_init_for_glyphs (&extents, surface,
 239                                                           op, source,
 240                                                           scaled_font,
 241                                                           glyphs, num_glyphs,
 242                                                           clip, &overlap);
 243     if (unlikely (status))
 244         return status;
 245
 246     do {
 247         while (compositor->glyphs == NULL)
 248             compositor = compositor->delegate;
 249
 250         status = compositor->glyphs (compositor, &extents,
 251                                      scaled_font, glyphs, num_glyphs, overlap);
 252
 253         compositor = compositor->delegate;
 254     } while (status == CAIRO_INT_STATUS_UNSUPPORTED);
 255
 256     if (status == CAIRO_INT_STATUS_SUCCESS && surface->damage) {
 257         TRACE ((stderr, "%s: applying damage (%d,%d)x(%d, %d)\n",
 258                 __FUNCTION__,
 259                 extents.unbounded.x, extents.unbounded.y,
 260                 extents.unbounded.width, extents.unbounded.height));
 261         surface->damage = _cairo_damage_add_rectangle (surface->damage,
 262                                                        &extents.unbounded);
 263     }
 264
 265     _cairo_composite_rectangles_fini (&extents);
 266
 267     return status;
 268 }