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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include "test.h"
static Window get_root(struct test_display *t)
{
XSetWindowAttributes attr;
Window w;
/* Be nasty and install a fullscreen window on top so that we
* can guarantee we do not get clipped by children.
*/
attr.override_redirect = 1;
w= XCreateWindow(t->dpy, DefaultRootWindow(t->dpy),
0, 0, t->width, t->height, 0,
DefaultDepth(t->dpy, DefaultScreen(t->dpy)),
InputOutput,
DefaultVisual(t->dpy, DefaultScreen(t->dpy)),
CWOverrideRedirect, &attr);
XMapWindow(t->dpy, w);
return w;
}
static Display *real_display(int argc, char **argv)
{
Display *dpy;
const char *name = NULL;
int i;
for (i = 0; i < argc; i++) {
if (strncmp(argv[i], "-d", 2) == 0) {
if (argv[i][2] == '\0') {
if (i+1 < argc) {
name = argv[i+1];
i++;
}
} else
name = argv[i] + 2;
}
}
if (name == NULL)
name = getenv("DISPLAY");
if (name == NULL)
name = ":0"; /* useful default */
dpy = XOpenDisplay(name);
if (dpy == NULL)
die("unable to open real display %s\n", name);
printf("Opened connection to %s for testing.\n", name);
return dpy;
}
static Display *ref_display(int width, int height, int depth)
{
Display *dpy;
char buf[160];
const char *name;
int try;
name = getenv("REF_DISPLAY");
if (name) {
dpy = XOpenDisplay(name);
if (dpy == NULL)
die("unable to open reference display %s\n", name);
printf("Opened connection to %s for reference.\n", name);
return dpy;
}
snprintf(buf, sizeof(buf),
"Xvfb -ac -terminate -screen 0 %dx%dx%d :99 >/dev/null 2>&1 &",
width, height, depth);
if (system(buf))
die("unable to spawn '%s' for reference display\n", buf);
try = 0;
while (try++ < 1000) {
dpy = XOpenDisplay(":99");
if (dpy)
break;
usleep(1000);
}
if (dpy == NULL)
die("unable to open reference display\n");
return dpy;
}
static void shm_setup(struct test_display *d)
{
int major, minor, has_pixmaps;
int size;
XShmQueryVersion(d->dpy, &major, &minor, &has_pixmaps);
if (major == 0 && minor == 0)
die("XSHM not supported\n");
size = d->width * d->height * 4;
d->max_shm_size = size;
d->shm.shmid = shmget(IPC_PRIVATE, size, IPC_CREAT | 0600);
if (d->shm.shmid == -1)
die("failed to allocated %d bytes for a shm segment\n", size);
d->shm.shmaddr = shmat(d->shm.shmid, NULL, 0);
d->shm.readOnly = 0;
XShmAttach(d->dpy, &d->shm);
XSync(d->dpy, 1);
}
static void default_setup(struct test_display *dpy)
{
dpy->width = WidthOfScreen(DefaultScreenOfDisplay(dpy->dpy));
dpy->height = HeightOfScreen(DefaultScreenOfDisplay(dpy->dpy));
dpy->format =
XRenderFindVisualFormat(dpy->dpy,
DefaultVisual(dpy->dpy,
DefaultScreen(dpy->dpy)));
}
static void test_get_displays(int argc, char **argv,
struct test_display *real,
struct test_display *ref)
{
real->dpy = real_display(argc, argv);
default_setup(real);
shm_setup(real);
real->root = get_root(real);
ref->dpy = ref_display(real->width, real->height,
DefaultDepth(real->dpy, DefaultScreen(real->dpy)));
default_setup(ref);
shm_setup(ref);
ref->root = get_root(ref);
}
void test_init(struct test *test, int argc, char **argv)
{
memset(test, 0, sizeof(*test));
test_get_displays(argc, argv, &test->real, &test->ref);
}
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