d031df2719
Fixes a display bug seenby ajacoutot@, ok jsg@ and kettenis@. newer X.Org (2.99.917 or master) version cause corruption on older machines (X40, i965), probably caused by a bug in our kernel, under investigation by kettenis@.
114 lines
2.3 KiB
C
114 lines
2.3 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <X11/extensions/Xfixes.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <time.h>
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#include <xf86drm.h>
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#include <drm.h>
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#include "dri2.h"
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#define COUNT 60
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static int dri2_open(Display *dpy)
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{
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drm_auth_t auth;
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char *driver, *device;
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int fd;
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if (!DRI2Connect(dpy, DefaultRootWindow(dpy), &driver, &device))
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return -1;
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printf ("Connecting to %s driver on %s\n", driver, device);
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fd = open(device, O_RDWR);
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if (fd < 0)
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return -1;
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if (drmIoctl(fd, DRM_IOCTL_GET_MAGIC, &auth))
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return -1;
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if (!DRI2Authenticate(dpy, DefaultRootWindow(dpy), auth.magic))
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return -1;
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return fd;
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}
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static void run(Display *dpy, int width, int height,
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unsigned int *attachments, int nattachments,
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const char *name)
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{
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Window win;
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XSetWindowAttributes attr;
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int count, loop;
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DRI2Buffer *buffers;
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/* Be nasty and install a fullscreen window on top so that we
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* can guarantee we do not get clipped by children.
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*/
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attr.override_redirect = 1;
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loop = 100;
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do {
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win = XCreateWindow(dpy, DefaultRootWindow(dpy),
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0, 0, width, height, 0,
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DefaultDepth(dpy, DefaultScreen(dpy)),
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InputOutput,
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DefaultVisual(dpy, DefaultScreen(dpy)),
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CWOverrideRedirect, &attr);
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XMapWindow(dpy, win);
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DRI2CreateDrawable(dpy, win);
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buffers = DRI2GetBuffers(dpy, win, &width, &height,
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attachments, nattachments, &count);
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if (count != nattachments)
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return;
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free(buffers);
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for (count = 0; count < loop; count++)
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DRI2SwapBuffers(dpy, win, 0, 0, 0);
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XDestroyWindow(dpy, win);
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} while (--loop);
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XSync(dpy, 1);
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sleep(2);
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XSync(dpy, 1);
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}
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int main(void)
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{
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Display *dpy;
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int width, height, fd;
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unsigned int attachments[] = {
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DRI2BufferBackLeft,
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DRI2BufferFrontLeft,
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};
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dpy = XOpenDisplay (NULL);
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if (dpy == NULL)
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return 77;
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fd = dri2_open(dpy);
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if (fd < 0)
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return 1;
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width = WidthOfScreen(DefaultScreenOfDisplay(dpy));
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height = HeightOfScreen(DefaultScreenOfDisplay(dpy));
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run(dpy, width, height, attachments, 1, "fullscreen");
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run(dpy, width, height, attachments, 2, "fullscreen (with front)");
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width /= 2;
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height /= 2;
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run(dpy, width, height, attachments, 1, "windowed");
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run(dpy, width, height, attachments, 2, "windowed (with front)");
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return 0;
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}
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