aboutsummaryrefslogtreecommitdiff
path: root/src/wld/buffer.c
blob: 46b1b3b4f3469741e0fc491df16137f204176080 (plain)
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
/* wld: buffer.c
 *
 * Copyright (c) 2013, 2014 Michael Forney
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "wld-private.h"

void buffer_initialize(struct buffer * buffer,
                       const struct wld_buffer_impl * impl,
                       uint32_t width, uint32_t height,
                       uint32_t format, uint32_t pitch)
{
    *((const struct wld_buffer_impl **) &buffer->base.impl) = impl;
    buffer->base.width = width;
    buffer->base.height = height;
    buffer->base.format = format;
    buffer->base.pitch = pitch;
    buffer->base.map = NULL;
    buffer->references = 1;
    buffer->map_references = 0;
    buffer->exporters = NULL;
    buffer->destructors = NULL;
    pixman_region32_init_rect(&buffer->base.damage, 0, 0, width, height);
}

EXPORT
bool wld_map(struct wld_buffer * base)
{
    struct buffer * buffer = (void *) base;

    if (buffer->map_references == 0 && !buffer->base.impl->map(buffer))
        return false;

    ++buffer->map_references;
    return true;
}

EXPORT
bool wld_unmap(struct wld_buffer * base)
{
    struct buffer * buffer = (void *) base;

    if (buffer->map_references == 0
        || (buffer->map_references == 1 && !buffer->base.impl->unmap(buffer)))
    {
        return false;
    }

    --buffer->map_references;
    return true;
}

EXPORT
bool wld_export(struct wld_buffer * base,
                uint32_t type, union wld_object * object)
{
    struct buffer * buffer = (void *) base;
    struct wld_exporter * exporter;

    for (exporter = buffer->exporters; exporter; exporter = exporter->next)
    {
        if (exporter->export(exporter, &buffer->base, type, object))
            return true;
    }

    return false;
}

EXPORT
void wld_buffer_add_exporter(struct wld_buffer * base,
                             struct wld_exporter * exporter)
{
    struct buffer * buffer = (void *) base;

    exporter->next = buffer->exporters;
    buffer->exporters = exporter;
}

EXPORT
void wld_buffer_add_destructor(struct wld_buffer * base,
                               struct wld_destructor * destructor)
{
    struct buffer * buffer = (void *) base;

    destructor->next = buffer->destructors;
    buffer->destructors = destructor;
}

EXPORT
void wld_buffer_reference(struct wld_buffer * base)
{
    struct buffer * buffer = (void *) base;

    ++buffer->references;
}

EXPORT
void wld_buffer_unreference(struct wld_buffer * base)
{
    struct buffer * buffer = (void *) base;
    struct wld_destructor * destructor, * next;

    if (--buffer->references > 0)
        return;

    pixman_region32_fini(&buffer->base.damage);

    for (destructor = buffer->destructors; destructor; destructor = next)
    {
        next = destructor->next;
        destructor->destroy(destructor);
    }

    if (buffer->map_references > 0)
        buffer->base.impl->unmap(buffer);

    buffer->base.impl->destroy(buffer);
}