commit d754e71ce410ed3450983cd6c78785b51cc1c29a
parent 793f34f1949fa455420264988d7e6c68d6e69587
Author: sewn <sewn@disroot.org>
Date: Mon, 21 Oct 2024 20:29:36 +0300
why is this here
Diffstat:
| D | poolbuf.h | | | 143 | ------------------------------------------------------------------------------- |
1 file changed, 0 insertions(+), 143 deletions(-)
diff --git a/poolbuf.h b/poolbuf.h
@@ -1,143 +0,0 @@
-/*
- * poolbuf - https://codeberg.org/sewn/drwl
- *
- * Copyright (c) 2023-2024 sewn <sewn@disroot.org>
- *
- * 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 <stddef.h>
-#include <stdint.h>
-#include <sys/mman.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <wayland-client.h>
-
-typedef struct {
- struct wl_buffer *wl_buf;
- int32_t stride;
- int32_t size;
- void *data;
-} PoolBuf;
-
-#if defined(__linux__) || defined(___FreeBSD__)
-#ifdef __linux__
-#include <linux/memfd.h>
-#endif
-#define __POOLBUF_HAS_MEMFD_CREATE
-int memfd_create(const char *, unsigned);
-#else
-static void
-randname(char *buf)
-{
- struct timespec ts;
- clock_gettime(CLOCK_REALTIME, &ts);
- long r = ts.tv_nsec;
- for (int i = 0; i < 6; ++i) {
- buf[i] = 'A'+(r&15)+(r&16)*2;
- r >>= 5;
- }
-}
-
-static int
-create_shm(void)
-{
- char name[] = "/poolbuf-XXXXXX";
- int retries = 100;
-
- do {
- randname(name + sizeof(name) - 7);
- --retries;
- int fd = shm_open(name, O_RDWR | O_CREAT | O_EXCL, 0600);
- if (fd >= 0) {
- shm_unlink(name);
- return fd;
- }
- } while (retries > 0 && errno == EEXIST);
- return -1;
-}
-#endif
-
-static void
-poolbuf_destroy(PoolBuf *buf)
-{
- wl_buffer_destroy(buf->wl_buf);
- munmap(buf->data, buf->size);
- free(buf);
-}
-
-static void
-poolbuf_buffer_release(void *data, struct wl_buffer *wl_buffer)
-{
- PoolBuf *buf = data;
- poolbuf_destroy(buf);
-}
-
-static struct wl_buffer_listener poolbuf_buffer_listener = {
- .release = poolbuf_buffer_release,
-};
-
-/* Caller must call poolbuf_destroy after finalizing usage if norelease is passed */
-static PoolBuf *
-poolbuf_create(struct wl_shm *shm,
- int32_t width, int32_t height, int32_t stride, int norelease)
-{
- int fd;
- void *data;
- struct wl_shm_pool *shm_pool;
- struct wl_buffer *wl_buf;
- int32_t size = stride * height;
- PoolBuf *buf;
-
-#ifdef __POOLBUF_HAS_MEMFD_CREATE
- fd = memfd_create("poolbuf-shm-buffer-pool",
- MFD_CLOEXEC | MFD_ALLOW_SEALING | MFD_NOEXEC_SEAL);
-#else
- fd = create_shm();
-#endif
- if (fd < 0)
- return NULL;
-
- if ((ftruncate(fd, size)) < 0) {
- close(fd);
- return NULL;
- }
-
- data = mmap(NULL, size,
- PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
- if (data == MAP_FAILED) {
- close(fd);
- return NULL;
- }
-
- shm_pool = wl_shm_create_pool(shm, fd, size);
- wl_buf = wl_shm_pool_create_buffer(shm_pool, 0,
- width, height, stride, WL_SHM_FORMAT_ARGB8888);
- wl_shm_pool_destroy(shm_pool);
- close(fd);
-
- buf = calloc(1, sizeof(PoolBuf));
- buf->wl_buf = wl_buf;
- buf->stride = stride;
- buf->size = size;
- buf->data = data;
- if (!norelease)
- wl_buffer_add_listener(wl_buf, &poolbuf_buffer_listener, buf);
- return buf;
-}
