test: Add a simple exercise for DRI2 swap paths

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 168 insertions, 0 deletions

diff --git a/test/dri2-swap.c b/test/dri2-swap.c
new file mode 100644
index 00000000..5da3c727
--- /dev/null
+++ b/test/dri2-swap.c
@@ -0,0 +1,168 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/extensions/Xfixes.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <time.h>
+
+#include <xf86drm.h>
+#include <drm.h>
+
+#include "dri2.h"
+
+#define COUNT 60
+
+static int dri2_open(Display *dpy)
+{
+	drm_auth_t auth;
+	char *driver, *device;
+	int fd;
+
+	if (!DRI2Connect(dpy, DefaultRootWindow(dpy), &driver, &device))
+		return -1;
+
+	printf ("Connecting to %s driver on %s\n", driver, device);
+
+	fd = open("/dev/dri/card0", O_RDWR);
+	if (fd < 0)
+		return -1;
+
+	if (drmIoctl(fd, DRM_IOCTL_GET_MAGIC, &auth))
+		return -1;
+
+	if (!DRI2Authenticate(dpy, DefaultRootWindow(dpy), auth.magic))
+		return -1;
+
+	return fd;
+}
+
+static void dri2_copy_swap(Display *dpy, Drawable d, int width, int height)
+{
+	XRectangle rect;
+	XserverRegion region;
+
+	rect.x = 0;
+	rect.y = 0;
+	rect.width = width;
+	rect.height = height;
+
+	region = XFixesCreateRegion(dpy, &rect, 1);
+	DRI2CopyRegion(dpy, d, region, DRI2BufferFrontLeft, DRI2BufferBackLeft);
+	XFixesDestroyRegion(dpy, region);
+}
+
+static void xsync(Display *dpy, Window win)
+{
+	XImage *image;
+
+	image = XGetImage(dpy, win, 0, 0, 1, 1, ~0, ZPixmap);
+	if (image)
+		XDestroyImage(image);
+}
+
+static double elapsed(const struct timespec *start,
+		      const struct timespec *end)
+{
+	return (end->tv_sec - start->tv_sec) +
+		1e-9*(end->tv_nsec - start->tv_nsec);
+}
+
+static void run(Display *dpy, int width, int height,
+		const char *name)
+{
+	Window win;
+	XSetWindowAttributes attr;
+	unsigned int attachments[] = {
+		DRI2BufferFrontLeft,
+		DRI2BufferBackLeft,
+	};
+	int count;
+	DRI2Buffer *buffers;
+	struct timespec start, end;
+
+	/* 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;
+	win = XCreateWindow(dpy, DefaultRootWindow(dpy),
+			 0, 0, width, height, 0,
+			 DefaultDepth(dpy, DefaultScreen(dpy)),
+			 InputOutput,
+			 DefaultVisual(dpy, DefaultScreen(dpy)),
+			 CWOverrideRedirect, &attr);
+	XMapWindow(dpy, win);
+	xsync(dpy, win);
+
+	DRI2CreateDrawable(dpy, win);
+
+	count = 2;
+	buffers = DRI2GetBuffers(dpy, win, &width, &height,
+				 attachments, count, &count);
+	if (count != 2)
+		return;
+
+	xsync(dpy, win);
+	clock_gettime(CLOCK_MONOTONIC, &start);
+	for (count = 0; count < COUNT; count++)
+		DRI2SwapBuffers(dpy, win, 0, 0, 0);
+	xsync(dpy, win);
+	clock_gettime(CLOCK_MONOTONIC, &end);
+	printf("%d %s (%dx%d) swaps in %fs.\n",
+	       count, name, width, height, elapsed(&start, &end));
+
+	xsync(dpy, win);
+	clock_gettime(CLOCK_MONOTONIC, &start);
+	for (count = 0; count < COUNT; count++)
+		dri2_copy_swap(dpy, win, width, height);
+	xsync(dpy, win);
+	clock_gettime(CLOCK_MONOTONIC, &end);
+
+	printf("%d %s (%dx%d) blits in %fs.\n",
+	       count, name, width, height, elapsed(&start, &end));
+
+	DRI2SwapInterval(dpy, win, 0);
+
+	xsync(dpy, win);
+	clock_gettime(CLOCK_MONOTONIC, &start);
+	for (count = 0; count < COUNT; count++)
+		DRI2SwapBuffers(dpy, win, 0, 0, 0);
+	xsync(dpy, win);
+	clock_gettime(CLOCK_MONOTONIC, &end);
+	printf("%d %s (%dx%d) vblank=0 swaps in %fs.\n",
+	       count, name, width, height, elapsed(&start, &end));
+
+	XDestroyWindow(dpy, win);
+	free(buffers);
+
+	XSync(dpy, 1);
+}
+
+int main(void)
+{
+	Display *dpy;
+	int width, height, fd;
+
+	dpy = XOpenDisplay (NULL);
+	if (dpy == NULL)
+		return 77;
+
+	fd = dri2_open(dpy);
+	if (fd < 0)
+		return 1;
+
+	width = WidthOfScreen(DefaultScreenOfDisplay(dpy));
+	height = HeightOfScreen(DefaultScreenOfDisplay(dpy));
+	run(dpy, width, height, "fullscreen");
+
+	width /= 2;
+	height /= 2;
+	run(dpy, width, height, "windowed");
+
+
+	return 0;
+}