1#include <stdint.h>
2#include <stdio.h>
3#include <stdlib.h>
4
5#include <X11/Xlib.h>
6#include <X11/Xutil.h>
7#include <X11/extensions/Xfixes.h>
8#include <unistd.h>
9#include <fcntl.h>
10#include <string.h>
11#include <time.h>
12
13#include <xf86drm.h>
14#include <drm.h>
15
16#include "dri2.h"
17
18#define COUNT 60
19
20static int dri2_open(Display *dpy)
21{
22	drm_auth_t auth;
23	char *driver, *device;
24	int fd;
25
26	if (!DRI2Connect(dpy, DefaultRootWindow(dpy), &driver, &device))
27		return -1;
28
29	printf ("Connecting to %s driver on %s\n", driver, device);
30
31	fd = open(device, O_RDWR);
32	if (fd < 0)
33		return -1;
34
35	if (drmIoctl(fd, DRM_IOCTL_GET_MAGIC, &auth))
36		return -1;
37
38	if (!DRI2Authenticate(dpy, DefaultRootWindow(dpy), auth.magic))
39		return -1;
40
41	return fd;
42}
43
44static void dri2_copy_swap(Display *dpy, Drawable d,
45			   int width, int height, int has_front)
46{
47	XRectangle rect;
48	XserverRegion region;
49
50	rect.x = 0;
51	rect.y = 0;
52	rect.width = width;
53	rect.height = height;
54
55	region = XFixesCreateRegion(dpy, &rect, 1);
56	DRI2CopyRegion(dpy, d, region, DRI2BufferFrontLeft, DRI2BufferBackLeft);
57	if (has_front)
58		DRI2CopyRegion(dpy, d, region, DRI2BufferFakeFrontLeft, DRI2BufferFrontLeft);
59	XFixesDestroyRegion(dpy, region);
60}
61
62static void xsync(Display *dpy, Window win)
63{
64	XImage *image;
65
66	image = XGetImage(dpy, win, 0, 0, 1, 1, ~0, ZPixmap);
67	if (image)
68		XDestroyImage(image);
69}
70
71static double elapsed(const struct timespec *start,
72		      const struct timespec *end)
73{
74	return (end->tv_sec - start->tv_sec) +
75		1e-9*(end->tv_nsec - start->tv_nsec);
76}
77
78static void run(Display *dpy, int width, int height,
79		unsigned int *attachments, int nattachments,
80		const char *name)
81{
82	Window win;
83	XSetWindowAttributes attr;
84	int count;
85	DRI2Buffer *buffers;
86	struct timespec start, end;
87
88	/* Be nasty and install a fullscreen window on top so that we
89	 * can guarantee we do not get clipped by children.
90	 */
91	attr.override_redirect = 1;
92	win = XCreateWindow(dpy, DefaultRootWindow(dpy),
93			 0, 0, width, height, 0,
94			 DefaultDepth(dpy, DefaultScreen(dpy)),
95			 InputOutput,
96			 DefaultVisual(dpy, DefaultScreen(dpy)),
97			 CWOverrideRedirect, &attr);
98	XMapWindow(dpy, win);
99	xsync(dpy, win);
100
101	DRI2CreateDrawable(dpy, win);
102
103	buffers = DRI2GetBuffers(dpy, win, &width, &height,
104				 attachments, nattachments, &count);
105	if (count != nattachments)
106		return;
107
108	xsync(dpy, win);
109	clock_gettime(CLOCK_MONOTONIC, &start);
110	for (count = 0; count < COUNT; count++)
111		DRI2SwapBuffers(dpy, win, 0, 0, 0);
112	xsync(dpy, win);
113	clock_gettime(CLOCK_MONOTONIC, &end);
114	printf("%d %s (%dx%d) swaps in %fs.\n",
115	       count, name, width, height, elapsed(&start, &end));
116
117	xsync(dpy, win);
118	clock_gettime(CLOCK_MONOTONIC, &start);
119	for (count = 0; count < COUNT; count++)
120		dri2_copy_swap(dpy, win, width, height, nattachments == 2);
121	xsync(dpy, win);
122	clock_gettime(CLOCK_MONOTONIC, &end);
123
124	printf("%d %s (%dx%d) blits in %fs.\n",
125	       count, name, width, height, elapsed(&start, &end));
126
127	DRI2SwapInterval(dpy, win, 0);
128
129	xsync(dpy, win);
130	clock_gettime(CLOCK_MONOTONIC, &start);
131	for (count = 0; count < COUNT; count++)
132		DRI2SwapBuffers(dpy, win, 0, 0, 0);
133	xsync(dpy, win);
134	clock_gettime(CLOCK_MONOTONIC, &end);
135	printf("%d %s (%dx%d) vblank=0 swaps in %fs.\n",
136	       count, name, width, height, elapsed(&start, &end));
137
138	XDestroyWindow(dpy, win);
139	free(buffers);
140
141	XSync(dpy, 1);
142}
143
144int main(void)
145{
146	Display *dpy;
147	int width, height, fd;
148	unsigned int attachments[] = {
149		DRI2BufferBackLeft,
150		DRI2BufferFrontLeft,
151	};
152
153	dpy = XOpenDisplay (NULL);
154	if (dpy == NULL)
155		return 77;
156
157	fd = dri2_open(dpy);
158	if (fd < 0)
159		return 1;
160
161	width = WidthOfScreen(DefaultScreenOfDisplay(dpy));
162	height = HeightOfScreen(DefaultScreenOfDisplay(dpy));
163	run(dpy, width, height, attachments, 1, "fullscreen");
164	run(dpy, width, height, attachments, 2, "fullscreen (with front)");
165
166	width /= 2;
167	height /= 2;
168	run(dpy, width, height, attachments, 1, "windowed");
169	run(dpy, width, height, attachments, 2, "windowed (with front)");
170
171	return 0;
172}
173