1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/* cairo - a vector graphics library with display and print output
*
* Copyright © 2005 Red Hat, Inc
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is Red Hat, Inc.
*
* Contributor(s):
* Carl Worth <cworth@cworth.org>
*/
/* This isn't a "real" surface, but just something to be used by the
* test suite to test a mythical backend that uses nothing but
* fallbacks.
*
* The defining feature of this backend is that it has as many NULL
* backend function entries as possible. The ones that aren't NULL are
* simply those that must be implemented to have working fallbacks.
* (Except for create_similar---fallbacks would work fine without
* that---I implemented it here in order to create as many surfaces as
* possible of type test_fallback_surface_t during the test suite
* run).
*
* It's possible that this code might serve as a good starting point
* for someone working on bringing up a new backend, starting with the
* minimal all-fallbacks approach and working up gradually from
* there.
*/
#include "test-fallback-surface.h"
#include "cairoint.h"
typedef struct _test_fallback_surface {
cairo_surface_t base;
/* This is a cairo_image_surface to hold the actual contents. */
cairo_surface_t *backing;
} test_fallback_surface_t;
const cairo_private cairo_surface_backend_t test_fallback_surface_backend;
cairo_surface_t *
_test_fallback_surface_create (cairo_content_t content,
int width,
int height)
{
test_fallback_surface_t *surface;
cairo_surface_t *backing;
backing = _cairo_image_surface_create_with_content (content, width, height);
if (cairo_surface_status (backing))
return (cairo_surface_t*) &_cairo_surface_nil;
surface = malloc (sizeof (test_fallback_surface_t));
if (surface == NULL) {
_cairo_error (CAIRO_STATUS_NO_MEMORY);
return (cairo_surface_t*) &_cairo_surface_nil;
}
_cairo_surface_init (&surface->base, &test_fallback_surface_backend,
content);
surface->backing = backing;
return &surface->base;
}
static cairo_surface_t *
_test_fallback_surface_create_similar (void *abstract_surface,
cairo_content_t content,
int width,
int height)
{
assert (CAIRO_CONTENT_VALID (content));
return _test_fallback_surface_create (content,
width, height);
}
static cairo_status_t
_test_fallback_surface_finish (void *abstract_surface)
{
test_fallback_surface_t *surface = abstract_surface;
cairo_surface_destroy (surface->backing);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_test_fallback_surface_acquire_source_image (void *abstract_surface,
cairo_image_surface_t **image_out,
void **image_extra)
{
test_fallback_surface_t *surface = abstract_surface;
return _cairo_surface_acquire_source_image (surface->backing,
image_out, image_extra);
}
static void
_test_fallback_surface_release_source_image (void *abstract_surface,
cairo_image_surface_t *image,
void *image_extra)
{
test_fallback_surface_t *surface = abstract_surface;
_cairo_surface_release_source_image (surface->backing,
image, image_extra);
}
static cairo_status_t
_test_fallback_surface_acquire_dest_image (void *abstract_surface,
cairo_rectangle_int16_t *interest_rect,
cairo_image_surface_t **image_out,
cairo_rectangle_int16_t *image_rect_out,
void **image_extra)
{
test_fallback_surface_t *surface = abstract_surface;
return _cairo_surface_acquire_dest_image (surface->backing,
interest_rect,
image_out,
image_rect_out,
image_extra);
}
static void
_test_fallback_surface_release_dest_image (void *abstract_surface,
cairo_rectangle_int16_t *interest_rect,
cairo_image_surface_t *image,
cairo_rectangle_int16_t *image_rect,
void *image_extra)
{
test_fallback_surface_t *surface = abstract_surface;
_cairo_surface_release_dest_image (surface->backing,
interest_rect,
image,
image_rect,
image_extra);
}
static cairo_int_status_t
_test_fallback_surface_get_extents (void *abstract_surface,
cairo_rectangle_int16_t *rectangle)
{
test_fallback_surface_t *surface = abstract_surface;
return _cairo_surface_get_extents (surface->backing, rectangle);
}
const cairo_surface_backend_t test_fallback_surface_backend = {
CAIRO_INTERNAL_SURFACE_TYPE_TEST_FALLBACK,
_test_fallback_surface_create_similar,
_test_fallback_surface_finish,
_test_fallback_surface_acquire_source_image,
_test_fallback_surface_release_source_image,
_test_fallback_surface_acquire_dest_image,
_test_fallback_surface_release_dest_image,
NULL, /* clone_similar */
NULL, /* composite */
NULL, /* fill_rectangles */
NULL, /* composite_trapezoids */
NULL, /* copy_page */
NULL, /* show_page */
NULL, /* set_clip_region */
NULL, /* intersect_clip_path */
_test_fallback_surface_get_extents,
NULL, /* old_show_glyphs */
NULL, /* get_font_options */
NULL, /* flush */
NULL, /* mark_dirty_rectangle */
NULL, /* scaled_font_fini */
NULL, /* scaled_glyph_fini */
NULL, /* paint */
NULL, /* mask */
NULL, /* stroke */
NULL, /* fill */
NULL, /* show_glyphs */
NULL /* snapshot */
};
|
