progs/egl/segl/segl_x11.c

   1 #include <stdlib.h>
   2 #include <sys/time.h>
   3 #include <X11/Xlib.h>
   4 #include <X11/Xutil.h>
   5
   6 #include "segl.h"
   7
   8 static Window
   9 x11_create_window(struct segl_winsys *winsys, const char *name,
  10                   EGLint width, EGLint height, EGLint visual)
  11 {
  12    XVisualInfo vinfo_template, *vinfo = NULL;
  13    EGLint val, num_vinfo;
  14    Window root, win;
  15    XSetWindowAttributes attrs;
  16    unsigned long mask;
  17    EGLint x = 0, y = 0;
  18
  19    vinfo_template.visualid = (VisualID) val;
  20    vinfo = XGetVisualInfo(winsys->dpy, VisualIDMask, &vinfo_template, &num_vinfo);
  21    if (!num_vinfo) {
  22       if (vinfo)
  23          XFree(vinfo);
  24       return None;
  25    }
  26
  27    root = DefaultRootWindow(winsys->dpy);
  28
  29    /* window attributes */
  30    attrs.background_pixel = 0;
  31    attrs.border_pixel = 0;
  32    attrs.colormap = XCreateColormap(winsys->dpy, root, vinfo->visual, AllocNone);
  33    attrs.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
  34    attrs.override_redirect = False;
  35    mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask | CWOverrideRedirect;
  36
  37    win = XCreateWindow(winsys->dpy, root, x, y, width, height, 0,
  38          vinfo->depth, InputOutput, vinfo->visual, mask, &attrs);
  39    XFree(vinfo);
  40
  41    if (!win)
  42       return None;
  43
  44    /* set hints and properties */
  45    {
  46       XSizeHints sizehints;
  47       sizehints.x = x;
  48       sizehints.y = y;
  49       sizehints.width  = width;
  50       sizehints.height = height;
  51       sizehints.flags = USSize | USPosition;
  52       XSetNormalHints(winsys->dpy, win, &sizehints);
  53       XSetStandardProperties(winsys->dpy, win, name, name,
  54                              None, (char **)NULL, 0, &sizehints);
  55    }
  56
  57    XMapWindow(winsys->dpy, win);
  58
  59    return win;
  60 }
  61
  62 static void
  63 x11_destroy_window(struct segl_winsys *winsys, Window win)
  64 {
  65    if (win)
  66       XDestroyWindow(winsys->dpy, win);
  67 }
  68
  69
  70 static Pixmap
  71 x11_create_pixmap(struct segl_winsys *winsys, EGLint width, EGLint height,
  72                   EGLint depth)
  73 {
  74    Window root = DefaultRootWindow(winsys->dpy);
  75    Pixmap pix;
  76
  77    pix = XCreatePixmap(winsys->dpy, (Drawable) root, width, height, depth);
  78
  79    return pix;
  80 }
  81
  82 static void
  83 x11_destroy_pixmap(struct segl_winsys *winsys, Pixmap pix)
  84 {
  85    if (pix)
  86       XFreePixmap(winsys->dpy, pix);
  87 }
  88
  89 static double
  90 x11_now(struct segl_winsys *winsys)
  91 {
  92    struct timeval tv;
  93
  94    gettimeofday(&tv, NULL);
  95
  96    return (double) tv.tv_sec + tv.tv_usec / 1000000.0;
  97 }
  98
  99 struct segl_winsys *
 100 segl_get_winsys(EGLNativeDisplayType dpy)
 101 {
 102    struct segl_winsys *winsys;
 103
 104    winsys = calloc(1, sizeof(*winsys));
 105    if (winsys) {
 106       winsys->dpy = dpy;
 107
 108       winsys->create_window = x11_create_window;
 109       winsys->destroy_window = x11_destroy_window;
 110       winsys->create_pixmap = x11_create_pixmap;
 111       winsys->destroy_pixmap = x11_destroy_pixmap;
 112
 113       winsys->now = x11_now;
 114    }
 115
 116    return winsys;
 117 }