Destroy the pool.
</description>
</request>
+
+ <request name="resize">
+ <description summary="change the size of the pool mapping">
+ This request will cause the server to remap the backing memory
+ for the pool from the fd passed when the pool was creating but
+ using the new size.
+ </description>
+
+ <arg name="size" type="int"/>
+ </request>
</interface>
<interface name="wl_shm" version="1">
int refcount;
char *data;
int size;
+ int fd;
};
struct wl_shm_buffer {
struct wl_buffer buffer;
int32_t stride;
uint32_t format;
- void *data;
+ int offset;
struct wl_shm_pool *pool;
};
return;
munmap(pool->data, pool->size);
+ close(pool->fd);
free(pool);
}
buffer->buffer.height = height;
buffer->format = format;
buffer->stride = stride;
- buffer->data = pool->data + offset;
+ buffer->offset = offset;
buffer->pool = pool;
pool->refcount++;
wl_resource_destroy(resource);
}
+static void
+shm_pool_resize(struct wl_client *client, struct wl_resource *resource,
+ int32_t size)
+{
+ struct wl_shm_pool *pool = resource->data;
+ void *data;
+
+ data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED,
+ pool->fd, 0);
+
+ if (data == MAP_FAILED) {
+ wl_resource_post_error(resource,
+ WL_SHM_ERROR_INVALID_FD,
+ "failed mmap fd %d", pool->fd);
+ return;
+ }
+
+ munmap(pool->data, pool->size);
+ pool->data = data;
+ pool->size = size;
+}
+
struct wl_shm_pool_interface shm_pool_interface = {
shm_pool_create_buffer,
- shm_pool_destroy
+ shm_pool_destroy,
+ shm_pool_resize
};
static void
}
pool->refcount = 1;
+ pool->fd = fd;
pool->size = size;
pool->data = mmap(NULL, size,
PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
- close(fd);
if (pool->data == MAP_FAILED) {
wl_resource_post_error(resource,
WL_SHM_ERROR_INVALID_FD,
if (!wl_buffer_is_shm(buffer_base))
return NULL;
- return buffer->data;
+ return buffer->pool->data + buffer->offset;
}
WL_EXPORT uint32_t