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#define _GNU_SOURCE
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <sys/mman.h>
#include <X11/Xproto.h>
#include <X11/Xlib.h>
#include "private.h"
static void
buffer_release(void *data, struct wl_buffer *buffer)
{
}
static const struct wl_buffer_listener buffer_listener = {
buffer_release
};
static int
create_shm_buffer(struct csx_display *display, struct csx_pixmap *pixmap)
{
struct wl_shm_pool *pool;
int fd, size, stride, i;
const char *path;
char name[PATH_MAX];
uint32_t *p;
stride = pixmap->width * 4;
size = stride * pixmap->height;
path = getenv("XDG_RUNTIME_DIR");
if (!path) {
errno = ENOENT;
return -1;
}
snprintf(name, sizeof name, "%s/csx-pixmap-XXXXXX", path);
fd = mkostemp(name, O_CLOEXEC);
if (fd < 0)
return -1;
unlink(name);
if (ftruncate(fd, size) < 0) {
close(fd);
return -1;
}
pixmap->data =
mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if (pixmap->data == MAP_FAILED) {
fprintf(stderr, "mmap failed: %m\n");
close(fd);
return -1;
}
pool = wl_shm_create_pool(display->shm, fd, size);
pixmap->buffer = wl_shm_pool_create_buffer(pool, 0,
pixmap->width,
pixmap->height,
stride,
WL_SHM_FORMAT_ARGB8888);
wl_buffer_add_listener(pixmap->buffer, &buffer_listener, pixmap);
wl_shm_pool_destroy(pool);
close(fd);
p = pixmap->data;
for (i = 0; i < size / 4; i++)
p[i] = 0xff000000 | (0x00010004 * i);
return 0;
}
struct csx_pixmap *
csx_pixmap_create(struct csx_display *display,
unsigned int width, unsigned int height, unsigned int depth)
{
struct csx_pixmap *pixmap;
pixmap = malloc(sizeof *pixmap);
if (pixmap == NULL)
return NULL;
memset(pixmap, 0, sizeof *pixmap);
pixmap->width = width;
pixmap->height = height;
pixmap->depth = depth;
pixmap->refcount = 1;
/* Only create this for window backing pixmaps, just use
* malloc for "normal" pixmaps. */
create_shm_buffer(display, pixmap);
return pixmap;
}
void
csx_pixmap_unref(struct csx_pixmap *pixmap)
{
int size;
pixmap->refcount--;
if (pixmap->refcount == 0) {
if (pixmap->buffer) {
size = pixmap->width * 4 * pixmap->height;
wl_buffer_destroy(pixmap->buffer);
munmap(pixmap->data, size);
} else {
free(pixmap->data);
}
free(pixmap);
}
}
WL_EXPORT Pixmap
XCreatePixmap(Display *xdisplay, Drawable drawable,
unsigned int width, unsigned int height, unsigned int depth)
{
struct csx_display *display = csx_display(xdisplay);
struct csx_pixmap *pixmap;
void *resource;
Pixmap id;
csx_display_enter(display, X_CreatePixmap, 0);
resource = csx_display_lookup_resource(display, drawable);
/* FIXME: Need to check resource type too */
if (resource == NULL) {
csx_display_error(display, drawable, BadDrawable);
return None;
}
pixmap = csx_pixmap_create(display, width, height, depth);
if (pixmap == NULL) {
csx_display_error(display, drawable, BadAlloc);
return None;
}
id = csx_display_add_resource(display, pixmap);
if (id == None) {
csx_pixmap_unref(pixmap);
csx_display_error(display, drawable, BadAlloc);
return None;
}
return id;
}
WL_EXPORT int
XFreePixmap(Display *xdisplay, Pixmap xpixmap)
{
struct csx_display *display = csx_display(xdisplay);
struct csx_pixmap *pixmap;
pixmap = csx_display_lookup_resource(display, xpixmap);
csx_display_remove_resource(display, xpixmap);
csx_pixmap_unref(pixmap);
return 0 /* return what? */;
}
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