1 Star 0 Fork 0

Gitee 极速下载 / swaybg

Create your Gitee Account
Explore and code with more than 6 million developers,Free private repositories !:)
Sign up
此仓库是为了提升国内下载速度的镜像仓库,每日同步一次。 原始仓库: https://github.com/swaywm/swaybg
Clone or Download
pool-buffer.c 2.11 KB
Copy Edit Web IDE Raw Blame History
#define _POSIX_C_SOURCE 200809
#include <assert.h>
#include <cairo.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
#include <wayland-client.h>
#include "pool-buffer.h"
static bool set_cloexec(int fd) {
long flags = fcntl(fd, F_GETFD);
if (flags == -1) {
return false;
}
if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1) {
return false;
}
return true;
}
static int create_pool_file(size_t size, char **name) {
static const char template[] = "sway-client-XXXXXX";
const char *path = getenv("XDG_RUNTIME_DIR");
if (path == NULL) {
fprintf(stderr, "XDG_RUNTIME_DIR is not set\n");
return -1;
}
size_t name_size = strlen(template) + 1 + strlen(path) + 1;
*name = malloc(name_size);
if (*name == NULL) {
fprintf(stderr, "allocation failed\n");
return -1;
}
snprintf(*name, name_size, "%s/%s", path, template);
int fd = mkstemp(*name);
if (fd < 0) {
return -1;
}
if (!set_cloexec(fd)) {
close(fd);
return -1;
}
if (ftruncate(fd, size) < 0) {
close(fd);
return -1;
}
return fd;
}
bool create_buffer(struct pool_buffer *buf, struct wl_shm *shm,
int32_t width, int32_t height, uint32_t format) {
uint32_t stride = width * 4;
size_t size = stride * height;
char *name;
int fd = create_pool_file(size, &name);
assert(fd != -1);
void *data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
struct wl_shm_pool *pool = wl_shm_create_pool(shm, fd, size);
buf->buffer = wl_shm_pool_create_buffer(pool, 0,
width, height, stride, format);
wl_shm_pool_destroy(pool);
close(fd);
unlink(name);
free(name);
fd = -1;
buf->size = size;
buf->data = data;
buf->surface = cairo_image_surface_create_for_data(data,
CAIRO_FORMAT_ARGB32, width, height, stride);
buf->cairo = cairo_create(buf->surface);
return true;
}
void destroy_buffer(struct pool_buffer *buffer) {
if (buffer->buffer) {
wl_buffer_destroy(buffer->buffer);
}
if (buffer->cairo) {
cairo_destroy(buffer->cairo);
}
if (buffer->surface) {
cairo_surface_destroy(buffer->surface);
}
if (buffer->data) {
munmap(buffer->data, buffer->size);
}
}

Comment ( 0 )

Sign in to post a comment

C/C++
1
https://toscode.gitee.com/mirrors/swaybg.git
git@toscode.gitee.com:mirrors/swaybg.git
mirrors
swaybg
swaybg
master

Search