webcam.c

   1 /*
   2  * webcam.c - fetch data from webcam
   3  *
   4  * author: hackbard
   5  *
   6  */
   7
   8 /* includes */
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <unistd.h>
  13 #include <X11/Xlib.h>
  14 #include <X11/Xutil.h>
  15 #include <X11/xpm.h>
  16 #include <X11/extensions/shape.h>
  17 #include "minirgb.h"
  18 #include "ivac-logo.xpm"
  19
  20 /* defines */
  21 #define XBM_WIDTH 256
  22 #define XBM_REAL_WIDTH 512
  23 #define XBM_HEIGHT 256
  24
  25 /* global variables */
  26 Display *display;
  27 Window ivac_win,icon_win;
  28 GC my_gc;
  29 MiniRGB rgb1,rgb2;
  30
  31
  32 void open_window(char *name,char *ivac_mask) {
  33
  34  /* local variables */
  35  int screen,width,height;
  36  Window root_win;
  37  XSizeHints my_size_hints;
  38  XClassHint my_class_hints;
  39  Pixel black,white;
  40  XGCValues my_gc_val;
  41  Pixmap pixmap_mask;
  42  XWMHints my_wm_hints;
  43
  44
  45  screen=DefaultScreen(display);
  46  root_win=DefaultRootWindow(display);
  47
  48  width=XBM_WIDTH; /* DisplayWidth(display,screen)/5; */
  49  height=XBM_HEIGHT; /* DisplayHeight(diplay,screen)/5; */
  50  my_size_hints.flags=USSize;
  51  my_size_hints.width=width;
  52  my_size_hints.height=height;
  53
  54  my_class_hints.res_name=name;
  55  my_class_hints.res_class=name;
  56
  57  black=BlackPixel(display,screen);
  58  white=WhitePixel(display,screen);
  59
  60  /* create window */
  61  ivac_win=XCreateSimpleWindow(display,root_win,0,0,
  62                                 my_size_hints.width,
  63                                 my_size_hints.height,
  64                                 1,black,white);
  65  icon_win=XCreateSimpleWindow(display,ivac_win,0,0,
  66                                 my_size_hints.width,
  67                                 my_size_hints.height,
  68                                 1,black,white);
  69
  70  /* set wm and class hints */
  71  XSetWMNormalHints(display,ivac_win,&my_size_hints);
  72  XSetClassHint(display,ivac_win,&my_class_hints);
  73
  74  /* select event input - what are we listening to? */
  75  XSelectInput(display,ivac_win,
  76                 ExposureMask | ButtonPressMask | ButtonReleaseMask |
  77                 StructureNotifyMask);
  78  XSelectInput(display,icon_win,
  79                 ExposureMask | ButtonPressMask | ButtonReleaseMask |
  80                 StructureNotifyMask);
  81
  82  /* set names for windows */
  83  XStoreName(display,ivac_win,name);
  84  XSetIconName(display,ivac_win,name);
  85
  86  /* graphics context values */
  87  my_gc_val.foreground=black;
  88  my_gc_val.background=white;
  89  my_gc_val.graphics_exposures=False;
  90
  91  /* set graphics context */
  92  my_gc=XCreateGC(display,ivac_win,
  93                 GCForeground | GCBackground | GCGraphicsExposures,
  94                 &my_gc_val);
  95
  96  /* create pixmap mask and shape windows */
  97  pixmap_mask=XCreateBitmapFromData(display,ivac_win,ivac_mask,
  98                                         XBM_WIDTH,XBM_HEIGHT);
  99  XShapeCombineMask(display,ivac_win,ShapeBounding,0,0,pixmap_mask,ShapeSet);
 100  XShapeCombineMask(display,icon_win,ShapeBounding,0,0,pixmap_mask,ShapeSet);
 101
 102  /* define and set wmhints */
 103  my_wm_hints.initial_state=WithdrawnState;
 104  my_wm_hints.flags=StateHint;
 105  my_wm_hints.icon_window=icon_win;
 106  my_wm_hints.icon_x=my_size_hints.x;
 107  my_wm_hints.icon_y=my_size_hints.y;
 108  my_wm_hints.window_group=ivac_win;
 109  my_wm_hints.flags =
 110         StateHint | IconWindowHint | IconPositionHint | WindowGroupHint;
 111  XSetWMHints(display,ivac_win,&my_wm_hints);
 112
 113  /* finaly ... map that stuff ;) */
 114  XMapWindow(display,ivac_win);
 115
 116 }
 117
 118
 119 /* main routine */
 120 int main(int argc,char **argv) {
 121
 122  /* local variables */
 123  XEvent xevent;
 124
 125
 126  /* opening display */
 127  display=XOpenDisplay(NULL); /* connect on local display :0 */
 128  if(display==NULL) {
 129   printf("cannot connect to xserver!\n");
 130   exit(EXIT_FAILURE);
 131  }
 132
 133  /* minirgb initialization */
 134  if (minirgb_init(display)) {
 135   printf("minirgb initialization failed!\n");
 136   exit(1);
 137  }
 138
 139  open_window(argv[0],ivac_logo);
 140
 141
 142  /* to be continued ... here is a test! */
 143  XFlush(display);
 144  sleep(5);
 145  printf("blaaaa, schmaeee\n");
 146
 147 }