2 * Copyright © 2008 Kristian Høgsberg
4 * Permission to use, copy, modify, distribute, and sell this software and its
5 * documentation for any purpose is hereby granted without fee, provided that
6 * the above copyright notice appear in all copies and that both that copyright
7 * notice and this permission notice appear in supporting documentation, and
8 * that the name of the copyright holders not be used in advertising or
9 * publicity pertaining to distribution of the software without specific,
10 * written prior permission. The copyright holders make no representations
11 * about the suitability of this software for any purpose. It is provided "as
12 * is" without express or implied warranty.
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
15 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
16 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
17 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
18 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
19 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
23 * Kristian Høgsberg <krh@bitplanet.net>
24 * Benjamin Franzke <benjaminfranzke@googlemail.com>
34 #include "wayland-server.h"
37 struct wl_resource resource;
44 struct wl_shm_buffer {
45 struct wl_buffer buffer;
49 struct wl_shm_pool *pool;
53 shm_pool_unref(struct wl_shm_pool *pool)
59 munmap(pool->data, pool->size);
65 destroy_buffer(struct wl_resource *resource)
67 struct wl_shm_buffer *buffer =
68 container_of(resource, struct wl_shm_buffer, buffer.resource);
71 shm_pool_unref(buffer->pool);
76 shm_buffer_destroy(struct wl_client *client, struct wl_resource *resource)
78 wl_resource_destroy(resource);
81 static const struct wl_buffer_interface shm_buffer_interface = {
86 shm_pool_create_buffer(struct wl_client *client, struct wl_resource *resource,
87 uint32_t id, int32_t offset,
88 int32_t width, int32_t height,
89 int32_t stride, uint32_t format)
91 struct wl_shm_pool *pool = resource->data;
92 struct wl_shm_buffer *buffer;
95 case WL_SHM_FORMAT_ARGB8888:
96 case WL_SHM_FORMAT_XRGB8888:
99 wl_resource_post_error(resource,
100 WL_SHM_ERROR_INVALID_FORMAT,
105 if (offset < 0 || width <= 0 || height <= 0 || stride < width ||
106 INT32_MAX / stride <= height ||
107 offset > pool->size - stride * height) {
108 wl_resource_post_error(resource,
109 WL_SHM_ERROR_INVALID_STRIDE,
110 "invalid width, height or stride (%dx%d, %u)",
111 width, height, stride);
115 buffer = malloc(sizeof *buffer);
116 if (buffer == NULL) {
117 wl_resource_post_no_memory(resource);
121 buffer->buffer.width = width;
122 buffer->buffer.height = height;
123 buffer->buffer.busy_count = 0;
124 buffer->format = format;
125 buffer->stride = stride;
126 buffer->offset = offset;
130 buffer->buffer.resource.object.id = id;
131 buffer->buffer.resource.object.interface = &wl_buffer_interface;
132 buffer->buffer.resource.object.implementation = (void (**)(void))
133 &shm_buffer_interface;
135 buffer->buffer.resource.data = buffer;
136 buffer->buffer.resource.client = resource->client;
137 buffer->buffer.resource.destroy = destroy_buffer;
139 wl_client_add_resource(client, &buffer->buffer.resource);
143 destroy_pool(struct wl_resource *resource)
145 struct wl_shm_pool *pool = resource->data;
147 shm_pool_unref(pool);
151 shm_pool_destroy(struct wl_client *client, struct wl_resource *resource)
153 wl_resource_destroy(resource);
157 shm_pool_resize(struct wl_client *client, struct wl_resource *resource,
160 struct wl_shm_pool *pool = resource->data;
163 data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED,
166 if (data == MAP_FAILED) {
167 wl_resource_post_error(resource,
168 WL_SHM_ERROR_INVALID_FD,
169 "failed mmap fd %d", pool->fd);
173 munmap(pool->data, pool->size);
178 struct wl_shm_pool_interface shm_pool_interface = {
179 shm_pool_create_buffer,
185 shm_create_pool(struct wl_client *client, struct wl_resource *resource,
186 uint32_t id, int fd, int32_t size)
188 struct wl_shm_pool *pool;
190 pool = malloc(sizeof *pool);
192 wl_resource_post_no_memory(resource);
198 wl_resource_post_error(resource,
199 WL_SHM_ERROR_INVALID_STRIDE,
200 "invalid size (%d)", size);
208 pool->data = mmap(NULL, size,
209 PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
210 if (pool->data == MAP_FAILED) {
211 wl_resource_post_error(resource,
212 WL_SHM_ERROR_INVALID_FD,
213 "failed mmap fd %d", fd);
217 pool->resource.object.id = id;
218 pool->resource.object.interface = &wl_shm_pool_interface;
219 pool->resource.object.implementation =
220 (void (**)(void)) &shm_pool_interface;
222 pool->resource.data = pool;
223 pool->resource.client = client;
224 pool->resource.destroy = destroy_pool;
226 wl_client_add_resource(client, &pool->resource);
229 static const struct wl_shm_interface shm_interface = {
234 bind_shm(struct wl_client *client,
235 void *data, uint32_t version, uint32_t id)
237 struct wl_resource *resource;
239 resource = wl_client_add_object(client, &wl_shm_interface,
240 &shm_interface, id, data);
242 wl_shm_send_format(resource, WL_SHM_FORMAT_ARGB8888);
243 wl_shm_send_format(resource, WL_SHM_FORMAT_XRGB8888);
247 wl_display_init_shm(struct wl_display *display)
249 if (!wl_display_add_global(display, &wl_shm_interface, NULL, bind_shm))
256 wl_buffer_is_shm(struct wl_buffer *buffer)
258 return buffer->resource.object.implementation ==
259 (void (**)(void)) &shm_buffer_interface;
263 wl_shm_buffer_get_stride(struct wl_buffer *buffer_base)
265 struct wl_shm_buffer *buffer = (struct wl_shm_buffer *) buffer_base;
267 if (!wl_buffer_is_shm(buffer_base))
270 return buffer->stride;
274 wl_shm_buffer_get_data(struct wl_buffer *buffer_base)
276 struct wl_shm_buffer *buffer = (struct wl_shm_buffer *) buffer_base;
278 if (!wl_buffer_is_shm(buffer_base))
281 return buffer->pool->data + buffer->offset;
285 wl_shm_buffer_get_format(struct wl_buffer *buffer_base)
287 struct wl_shm_buffer *buffer = (struct wl_shm_buffer *) buffer_base;
289 return buffer->format;