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Viewing changes to libs/cairo/cairo-1.12.16/src/cairo-shape-mask-compositor.c

  • Committer: Adam Reviczky
  • Date: 2015-04-26 22:40:47 UTC
  • Revision ID: adam.reviczky@kclalumni.net-20150426224047-i2p26n3wqphupq6z
TeX Live 2015 import (rev. 37052)

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libs/cairo/cairo-1.12.16/src/cairo-shape-mask-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 © 2012 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-clip-private.h"
42
 
#include "cairo-pattern-private.h"
43
 
#include "cairo-surface-private.h"
44
 
#include "cairo-surface-offset-private.h"
45
 
 
46
 
static cairo_int_status_t
47
 
_cairo_shape_mask_compositor_stroke (const cairo_compositor_t *_compositor,
48
 
                                     cairo_composite_rectangles_t *extents,
49
 
                                     const cairo_path_fixed_t   *path,
50
 
                                     const cairo_stroke_style_t *style,
51
 
                                     const cairo_matrix_t       *ctm,
52
 
                                     const cairo_matrix_t       *ctm_inverse,
53
 
                                     double              tolerance,
54
 
                                     cairo_antialias_t   antialias)
55
 
{
56
 
    cairo_surface_t *mask;
57
 
    cairo_surface_pattern_t pattern;
58
 
    cairo_int_status_t status;
59
 
    cairo_clip_t *clip;
60
 
 
61
 
    if (! extents->is_bounded)
62
 
        return CAIRO_INT_STATUS_UNSUPPORTED;
63
 
 
64
 
    TRACE ((stderr, "%s\n", __FUNCTION__));
65
 
    mask = _cairo_surface_create_similar_scratch (extents->surface,
66
 
                                                  CAIRO_CONTENT_ALPHA,
67
 
                                                  extents->bounded.width,
68
 
                                                  extents->bounded.height);
69
 
    if (unlikely (mask->status))
70
 
        return mask->status;
71
 
 
72
 
    clip = extents->clip;
73
 
    if (! _cairo_clip_is_region (clip))
74
 
        clip = _cairo_clip_copy_region (clip);
75
 
 
76
 
    if (! mask->is_clear) {
77
 
        status = _cairo_surface_offset_paint (mask,
78
 
                                              extents->bounded.x,
79
 
                                              extents->bounded.y,
80
 
                                              CAIRO_OPERATOR_CLEAR,
81
 
                                              &_cairo_pattern_clear.base,
82
 
                                              clip);
83
 
        if (unlikely (status))
84
 
            goto error;
85
 
    }
86
 
 
87
 
    status = _cairo_surface_offset_stroke (mask,
88
 
                                           extents->bounded.x,
89
 
                                           extents->bounded.y,
90
 
                                           CAIRO_OPERATOR_ADD,
91
 
                                           &_cairo_pattern_white.base,
92
 
                                           path, style, ctm, ctm_inverse,
93
 
                                           tolerance, antialias,
94
 
                                           clip);
95
 
    if (unlikely (status))
96
 
        goto error;
97
 
 
98
 
    if (clip != extents->clip) {
99
 
        status = _cairo_clip_combine_with_surface (extents->clip, mask,
100
 
                                                   extents->bounded.x,
101
 
                                                   extents->bounded.y);
102
 
        if (unlikely (status))
103
 
            goto error;
104
 
    }
105
 
 
106
 
    _cairo_pattern_init_for_surface (&pattern, mask);
107
 
    cairo_matrix_init_translate (&pattern.base.matrix,
108
 
                                 -extents->bounded.x,
109
 
                                 -extents->bounded.y);
110
 
    pattern.base.filter = CAIRO_FILTER_NEAREST;
111
 
    pattern.base.extend = CAIRO_EXTEND_NONE;
112
 
    if (extents->op == CAIRO_OPERATOR_SOURCE) {
113
 
        status = _cairo_surface_mask (extents->surface,
114
 
                                      CAIRO_OPERATOR_DEST_OUT,
115
 
                                      &_cairo_pattern_white.base,
116
 
                                      &pattern.base,
117
 
                                      clip);
118
 
        if ((status == CAIRO_INT_STATUS_SUCCESS)) {
119
 
            status = _cairo_surface_mask (extents->surface,
120
 
                                          CAIRO_OPERATOR_ADD,
121
 
                                          &extents->source_pattern.base,
122
 
                                          &pattern.base,
123
 
                                          clip);
124
 
        }
125
 
    } else {
126
 
        status = _cairo_surface_mask (extents->surface,
127
 
                                      extents->op,
128
 
                                      &extents->source_pattern.base,
129
 
                                      &pattern.base,
130
 
                                      clip);
131
 
    }
132
 
    _cairo_pattern_fini (&pattern.base);
133
 
 
134
 
error:
135
 
    cairo_surface_destroy (mask);
136
 
    if (clip != extents->clip)
137
 
        _cairo_clip_destroy (clip);
138
 
    return status;
139
 
}
140
 
 
141
 
static cairo_int_status_t
142
 
_cairo_shape_mask_compositor_fill (const cairo_compositor_t *_compositor,
143
 
                                   cairo_composite_rectangles_t *extents,
144
 
                                   const cairo_path_fixed_t     *path,
145
 
                                   cairo_fill_rule_t     fill_rule,
146
 
                                   double                        tolerance,
147
 
                                   cairo_antialias_t     antialias)
148
 
{
149
 
    cairo_surface_t *mask;
150
 
    cairo_surface_pattern_t pattern;
151
 
    cairo_int_status_t status;
152
 
    cairo_clip_t *clip;
153
 
 
154
 
    TRACE ((stderr, "%s\n", __FUNCTION__));
155
 
 
156
 
    if (! extents->is_bounded)
157
 
        return CAIRO_INT_STATUS_UNSUPPORTED;
158
 
 
159
 
    mask = _cairo_surface_create_similar_scratch (extents->surface,
160
 
                                                  CAIRO_CONTENT_ALPHA,
161
 
                                                  extents->bounded.width,
162
 
                                                  extents->bounded.height);
163
 
    if (unlikely (mask->status))
164
 
        return mask->status;
165
 
 
166
 
    clip = extents->clip;
167
 
    if (! _cairo_clip_is_region (clip))
168
 
        clip = _cairo_clip_copy_region (clip);
169
 
 
170
 
    if (! mask->is_clear) {
171
 
        status = _cairo_surface_offset_paint (mask,
172
 
                                              extents->bounded.x,
173
 
                                              extents->bounded.y,
174
 
                                              CAIRO_OPERATOR_CLEAR,
175
 
                                              &_cairo_pattern_clear.base,
176
 
                                              clip);
177
 
        if (unlikely (status))
178
 
            goto error;
179
 
    }
180
 
 
181
 
    status = _cairo_surface_offset_fill (mask,
182
 
                                         extents->bounded.x,
183
 
                                         extents->bounded.y,
184
 
                                         CAIRO_OPERATOR_ADD,
185
 
                                         &_cairo_pattern_white.base,
186
 
                                         path, fill_rule, tolerance, antialias,
187
 
                                         clip);
188
 
    if (unlikely (status))
189
 
        goto error;
190
 
 
191
 
    if (clip != extents->clip) {
192
 
        status = _cairo_clip_combine_with_surface (extents->clip, mask,
193
 
                                                   extents->bounded.x,
194
 
                                                   extents->bounded.y);
195
 
        if (unlikely (status))
196
 
            goto error;
197
 
    }
198
 
 
199
 
    _cairo_pattern_init_for_surface (&pattern, mask);
200
 
    cairo_matrix_init_translate (&pattern.base.matrix,
201
 
                                 -extents->bounded.x,
202
 
                                 -extents->bounded.y);
203
 
    pattern.base.filter = CAIRO_FILTER_NEAREST;
204
 
    pattern.base.extend = CAIRO_EXTEND_NONE;
205
 
    if (extents->op == CAIRO_OPERATOR_SOURCE) {
206
 
        status = _cairo_surface_mask (extents->surface,
207
 
                                      CAIRO_OPERATOR_DEST_OUT,
208
 
                                      &_cairo_pattern_white.base,
209
 
                                      &pattern.base,
210
 
                                      clip);
211
 
        if ((status == CAIRO_INT_STATUS_SUCCESS)) {
212
 
            status = _cairo_surface_mask (extents->surface,
213
 
                                          CAIRO_OPERATOR_ADD,
214
 
                                          &extents->source_pattern.base,
215
 
                                          &pattern.base,
216
 
                                          clip);
217
 
        }
218
 
    } else {
219
 
        status = _cairo_surface_mask (extents->surface,
220
 
                                      extents->op,
221
 
                                      &extents->source_pattern.base,
222
 
                                      &pattern.base,
223
 
                                      clip);
224
 
    }
225
 
    _cairo_pattern_fini (&pattern.base);
226
 
 
227
 
error:
228
 
    if (clip != extents->clip)
229
 
        _cairo_clip_destroy (clip);
230
 
    cairo_surface_destroy (mask);
231
 
    return status;
232
 
}
233
 
 
234
 
static cairo_int_status_t
235
 
_cairo_shape_mask_compositor_glyphs (const cairo_compositor_t *_compositor,
236
 
                                     cairo_composite_rectangles_t *extents,
237
 
                                     cairo_scaled_font_t        *scaled_font,
238
 
                                     cairo_glyph_t              *glyphs,
239
 
                                     int                         num_glyphs,
240
 
                                     cairo_bool_t                overlap)
241
 
{
242
 
    cairo_surface_t *mask;
243
 
    cairo_surface_pattern_t pattern;
244
 
    cairo_int_status_t status;
245
 
    cairo_clip_t *clip;
246
 
 
247
 
    if (! extents->is_bounded)
248
 
        return CAIRO_INT_STATUS_UNSUPPORTED;
249
 
 
250
 
    TRACE ((stderr, "%s\n", __FUNCTION__));
251
 
    mask = _cairo_surface_create_similar_scratch (extents->surface,
252
 
                                                  CAIRO_CONTENT_ALPHA,
253
 
                                                  extents->bounded.width,
254
 
                                                  extents->bounded.height);
255
 
    if (unlikely (mask->status))
256
 
        return mask->status;
257
 
 
258
 
    clip = extents->clip;
259
 
    if (! _cairo_clip_is_region (clip))
260
 
        clip = _cairo_clip_copy_region (clip);
261
 
 
262
 
    if (! mask->is_clear) {
263
 
        status = _cairo_surface_offset_paint (mask,
264
 
                                              extents->bounded.x,
265
 
                                              extents->bounded.y,
266
 
                                              CAIRO_OPERATOR_CLEAR,
267
 
                                              &_cairo_pattern_clear.base,
268
 
                                              clip);
269
 
        if (unlikely (status))
270
 
            goto error;
271
 
    }
272
 
 
273
 
    status = _cairo_surface_offset_glyphs (mask,
274
 
                                           extents->bounded.x,
275
 
                                           extents->bounded.y,
276
 
                                           CAIRO_OPERATOR_ADD,
277
 
                                           &_cairo_pattern_white.base,
278
 
                                           scaled_font, glyphs, num_glyphs,
279
 
                                           clip);
280
 
    if (unlikely (status))
281
 
        goto error;
282
 
 
283
 
    if (clip != extents->clip) {
284
 
        status = _cairo_clip_combine_with_surface (extents->clip, mask,
285
 
                                                   extents->bounded.x,
286
 
                                                   extents->bounded.y);
287
 
        if (unlikely (status))
288
 
            goto error;
289
 
    }
290
 
 
291
 
    _cairo_pattern_init_for_surface (&pattern, mask);
292
 
    cairo_matrix_init_translate (&pattern.base.matrix,
293
 
                                 -extents->bounded.x,
294
 
                                 -extents->bounded.y);
295
 
    pattern.base.filter = CAIRO_FILTER_NEAREST;
296
 
    pattern.base.extend = CAIRO_EXTEND_NONE;
297
 
    if (extents->op == CAIRO_OPERATOR_SOURCE) {
298
 
        status = _cairo_surface_mask (extents->surface,
299
 
                                      CAIRO_OPERATOR_DEST_OUT,
300
 
                                      &_cairo_pattern_white.base,
301
 
                                      &pattern.base,
302
 
                                      clip);
303
 
        if ((status == CAIRO_INT_STATUS_SUCCESS)) {
304
 
            status = _cairo_surface_mask (extents->surface,
305
 
                                          CAIRO_OPERATOR_ADD,
306
 
                                          &extents->source_pattern.base,
307
 
                                          &pattern.base,
308
 
                                          clip);
309
 
        }
310
 
    } else {
311
 
        status = _cairo_surface_mask (extents->surface,
312
 
                                      extents->op,
313
 
                                      &extents->source_pattern.base,
314
 
                                      &pattern.base,
315
 
                                      clip);
316
 
    }
317
 
    _cairo_pattern_fini (&pattern.base);
318
 
 
319
 
error:
320
 
    if (clip != extents->clip)
321
 
        _cairo_clip_destroy (clip);
322
 
    cairo_surface_destroy (mask);
323
 
    return status;
324
 
}
325
 
 
326
 
void
327
 
_cairo_shape_mask_compositor_init (cairo_compositor_t *compositor,
328
 
                                   const cairo_compositor_t  *delegate)
329
 
{
330
 
    compositor->delegate = delegate;
331
 
 
332
 
    compositor->paint  = NULL;
333
 
    compositor->mask   = NULL;
334
 
    compositor->fill   = _cairo_shape_mask_compositor_fill;
335
 
    compositor->stroke = _cairo_shape_mask_compositor_stroke;
336
 
    compositor->glyphs = _cairo_shape_mask_compositor_glyphs;
337
 
}