webcam.c

   1 /*
   2  * webcam.c - fetch data from webcam and display
   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 "images/ivac-logo.xpm"
  19 // #include "images/ivac-logo.h"
  20 #include "images/example_orig.xbm"
  21
  22 /* defines */
  23 #define XBM_WIDTH 256
  24 #define XBM_REAL_WIDTH 512
  25 #define XBM_HEIGHT 256
  26 // #define ivac_logo pixel_data
  27 #define ivac_logo example_bits
  28
  29 /* global variables */
  30 Display *display;
  31 Window ivac_win,icon_win;
  32 GC my_gc;
  33 MiniRGB rgb1,rgb2;
  34
  35
  36 void open_window(char *name,char *ivac_mask) {
  37
  38  /* local variables */
  39  int screen,width,height;
  40  Window root_win;
  41  XSizeHints my_size_hints;
  42  XClassHint my_class_hints;
  43  Pixel black,white;
  44  XGCValues my_gc_val;
  45  Pixmap pixmap_mask;
  46  XWMHints my_wm_hints;
  47
  48
  49  screen=DefaultScreen(display);
  50  root_win=DefaultRootWindow(display);
  51
  52  width=XBM_WIDTH; /* DisplayWidth(display,screen)/5; */
  53  height=XBM_HEIGHT; /* DisplayHeight(diplay,screen)/5; */
  54  my_size_hints.flags=USSize;
  55  my_size_hints.width=width;
  56  my_size_hints.height=height;
  57
  58  my_class_hints.res_name=name;
  59  my_class_hints.res_class=name;
  60
  61  black=BlackPixel(display,screen);
  62  white=WhitePixel(display,screen);
  63
  64  /* create window */
  65  ivac_win=XCreateSimpleWindow(display,root_win,0,0,
  66                                 my_size_hints.width,
  67                                 my_size_hints.height,
  68                                 1,black,white);
  69  icon_win=XCreateSimpleWindow(display,ivac_win,0,0,
  70                                 my_size_hints.width,
  71                                 my_size_hints.height,
  72                                 1,black,white);
  73
  74  /* set wm and class hints */
  75  XSetWMNormalHints(display,ivac_win,&my_size_hints);
  76  XSetClassHint(display,ivac_win,&my_class_hints);
  77
  78  /* select event input - what are we listening to? */
  79  XSelectInput(display,ivac_win,
  80                 ExposureMask | ButtonPressMask | ButtonReleaseMask |
  81                 StructureNotifyMask);
  82  XSelectInput(display,icon_win,
  83                 ExposureMask | ButtonPressMask | ButtonReleaseMask |
  84                 StructureNotifyMask);
  85
  86  /* set names for windows */
  87  XStoreName(display,ivac_win,name);
  88  XSetIconName(display,ivac_win,name);
  89
  90  /* graphics context values */
  91  my_gc_val.foreground=black;
  92  my_gc_val.background=white;
  93  my_gc_val.graphics_exposures=False;
  94
  95  /* set graphics context */
  96  my_gc=XCreateGC(display,ivac_win,
  97                 GCForeground | GCBackground | GCGraphicsExposures,
  98                 &my_gc_val);
  99
 100  /* create pixmap mask and shape windows */
 101  pixmap_mask=XCreateBitmapFromData(display,ivac_win,ivac_mask,
 102                                         XBM_WIDTH,XBM_HEIGHT);
 103  XShapeCombineMask(display,ivac_win,ShapeBounding,0,0,pixmap_mask,ShapeSet);
 104  XShapeCombineMask(display,icon_win,ShapeBounding,0,0,pixmap_mask,ShapeSet);
 105
 106  /* define and set wmhints */
 107  my_wm_hints.initial_state=WithdrawnState;
 108  my_wm_hints.flags=StateHint;
 109  my_wm_hints.icon_window=icon_win;
 110  my_wm_hints.icon_x=my_size_hints.x;
 111  my_wm_hints.icon_y=my_size_hints.y;
 112  my_wm_hints.window_group=ivac_win;
 113  my_wm_hints.flags =
 114         StateHint | IconWindowHint | IconPositionHint | WindowGroupHint;
 115  // XSetWMHints(display,ivac_win,&my_wm_hints);
 116
 117  /* finaly ... map that stuff ;) */
 118  XMapWindow(display,ivac_win);
 119
 120 }
 121
 122
 123 /* main routine */
 124 int main(int argc,char **argv) {
 125
 126  /* local variables */
 127  XEvent xevent;
 128
 129
 130  /* opening display */
 131  display=XOpenDisplay(NULL); /* connect on local display :0 */
 132  if(display==NULL) {
 133   printf("cannot connect to xserver!\n");
 134   exit(EXIT_FAILURE);
 135  }
 136
 137  /* minirgb initialization */
 138  if (minirgb_init(display)) {
 139   printf("minirgb initialization failed!\n");
 140   exit(1);
 141  }
 142
 143  open_window(argv[0],(char *)ivac_logo);
 144  minirgb_new(&rgb1,XBM_WIDTH,XBM_HEIGHT);
 145  minirgb_new(&rgb2,XBM_WIDTH,XBM_HEIGHT);
 146  minirgb_copy(&rgb2,&rgb1,0,0,XBM_WIDTH,XBM_HEIGHT,0,0);
 147
 148  /* to be continued ... here is a test! */
 149  XFlush(display);
 150  sleep(10);
 151  printf("blaaaa, schmaeee\n");
 152  XCloseDisplay(display);
 153  return 0;
 154
 155 }