tests/icons.c

   1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
   2
   3    icons.c for the Openbox window manager
   4    Copyright (c) 2003-2007   Dana Jansens
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    See the COPYING file for a copy of the GNU General Public License.
  17 */
  18
  19 #include <X11/Xlib.h>
  20 #include <X11/Xutil.h>
  21 #include <X11/Xatom.h>
  22 #include <X11/cursorfont.h>
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <assert.h>
  26 #include <glib.h>
  27
  28 Window findClient(Display *d, Window win)
  29 {
  30     Window r, *children;
  31     unsigned int n, i;
  32     Atom state = XInternAtom(d, "WM_STATE", True);
  33     Atom ret_type;
  34     int ret_format;
  35     unsigned long ret_items, ret_bytesleft;
  36     unsigned long *prop_return;
  37
  38     XQueryTree(d, win, &r, &r, &children, &n);
  39     for (i = 0; i < n; ++i) {
  40         Window w = findClient(d, children[i]);
  41         if (w) return w;
  42     }
  43
  44     // try me
  45     XGetWindowProperty(d, win, state, 0, 1,
  46                        False, state, &ret_type, &ret_format,
  47                        &ret_items, &ret_bytesleft,
  48                        (unsigned char**) &prop_return);
  49     if (ret_type == None || ret_items < 1)
  50         return None;
  51     return win; // found it!
  52 }
  53
  54 int main(int argc, char **argv)
  55 {
  56     Display *d = XOpenDisplay(NULL);
  57     int s = DefaultScreen(d);
  58     Atom net_wm_icon = XInternAtom(d, "_NET_WM_ICON", True);
  59     Atom ret_type;
  60     unsigned int winw = 0, winh = 0;
  61     int ret_format;
  62     unsigned long ret_items, ret_bytesleft;
  63     const int MAX_IMAGES = 10;
  64     unsigned long *prop_return[MAX_IMAGES];
  65     XImage *i[MAX_IMAGES];
  66     long offset = 0;
  67     unsigned int image = 0;
  68     unsigned int j; // loop counter
  69     Window id, win;
  70     Pixmap p;
  71     Cursor cur;
  72     XEvent ev;
  73     unsigned int bs = sizeof(long);
  74
  75     printf("Click on a window with an icon...\n");
  76
  77     //int id = strtol(argv[1], NULL, 16);
  78     XUngrabPointer(d, CurrentTime);
  79     cur = XCreateFontCursor(d, XC_crosshair);
  80     XGrabPointer(d, RootWindow(d, s), False, ButtonPressMask, GrabModeAsync,
  81                  GrabModeAsync, None, cur, CurrentTime);
  82     while (1) {
  83         XNextEvent(d, &ev);
  84         if (ev.type == ButtonPress) {
  85             XUngrabPointer(d, CurrentTime);
  86             id = findClient(d, ev.xbutton.subwindow);
  87             break;
  88         }
  89     }
  90
  91     printf("Using window 0x%lx\n", id);
  92
  93     do {
  94         unsigned int w, h;
  95
  96         XGetWindowProperty(d, id, net_wm_icon, offset++, 1,
  97                            False, XA_CARDINAL, &ret_type, &ret_format,
  98                            &ret_items, &ret_bytesleft,
  99                            (unsigned char**) &prop_return[image]);
 100         if (ret_type == None || ret_items < 1) {
 101             printf("No icon found\n");
 102             return 1;
 103         }
 104         w = prop_return[image][0];
 105         XFree(prop_return[image]);
 106
 107         XGetWindowProperty(d, id, net_wm_icon, offset++, 1,
 108                            False, XA_CARDINAL, &ret_type, &ret_format,
 109                            &ret_items, &ret_bytesleft,
 110                            (unsigned char**) &prop_return[image]);
 111         if (ret_type == None || ret_items < 1) {
 112             printf("Failed to get height\n");
 113             return 1;
 114         }
 115         h = prop_return[image][0];
 116         XFree(prop_return[image]);
 117
 118         XGetWindowProperty(d, id, net_wm_icon, offset, w*h,
 119                            False, XA_CARDINAL, &ret_type, &ret_format,
 120                            &ret_items, &ret_bytesleft,
 121                            (unsigned char**) &prop_return[image]);
 122         if (ret_type == None || ret_items < w*h) {
 123             printf("Failed to get image data\n");
 124             return 1;
 125         }
 126         offset += w*h;
 127
 128         printf("Found icon with size %dx%d\n", w, h);
 129
 130         i[image] = XCreateImage(d, DefaultVisual(d, s), DefaultDepth(d, s),
 131                                 ZPixmap, 0, NULL, w, h, 32, 0);
 132         assert(i[image]);
 133         i[image]->byte_order = LSBFirst;
 134         i[image]->data = (char*)prop_return[image];
 135         for (j = 0; j < w*h; j++) {
 136             unsigned char alpha = (unsigned char)i[image]->data[j*bs+3];
 137             unsigned char r = (unsigned char) i[image]->data[j*bs+0];
 138             unsigned char g = (unsigned char) i[image]->data[j*bs+1];
 139             unsigned char b = (unsigned char) i[image]->data[j*bs+2];
 140
 141             // background color
 142             unsigned char bgr = 0;
 143             unsigned char bgg = 0;
 144             unsigned char bgb = 0;
 145
 146             r = bgr + (r - bgr) * alpha / 256;
 147             g = bgg + (g - bgg) * alpha / 256;
 148             b = bgb + (b - bgb) * alpha / 256;
 149
 150             i[image]->data[j*4+0] = (char) r;
 151             i[image]->data[j*4+1] = (char) g;
 152             i[image]->data[j*4+2] = (char) b;
 153         }
 154
 155         winw += w;
 156         if (h > winh) winh = h;
 157
 158         ++image;
 159     } while (ret_bytesleft > 0 && image < MAX_IMAGES);
 160
 161 #define hashsize(n) ((guint32)1<<(n))
 162 #define hashmask(n) (hashsize(n)-1)
 163 #define rot(x,k) (((x)<<(k)) | ((x)>>(32-(k))))
 164
 165 #define mix(a,b,c) \
 166 { \
 167   a -= c;  a ^= rot(c, 4);  c += b; \
 168   b -= a;  b ^= rot(a, 6);  a += c; \
 169   c -= b;  c ^= rot(b, 8);  b += a; \
 170   a -= c;  a ^= rot(c,16);  c += b; \
 171   b -= a;  b ^= rot(a,19);  a += c; \
 172   c -= b;  c ^= rot(b, 4);  b += a; \
 173 }
 174
 175 #define final(a,b,c) \
 176 { \
 177   c ^= b; c -= rot(b,14); \
 178   a ^= c; a -= rot(c,11); \
 179   b ^= a; b -= rot(a,25); \
 180   c ^= b; c -= rot(b,16); \
 181   a ^= c; a -= rot(c,4);  \
 182   b ^= a; b -= rot(a,14); \
 183   c ^= b; c -= rot(b,24); \
 184 }
 185
 186     /* hash the images */
 187     for (j = 0; j < image; ++j) {
 188         unsigned int w, h, length;
 189         guint32 a,b,c;
 190         guint32 initval = 0xf00d;
 191         const guint32 *k = (guint32*)i[j]->data;
 192
 193         w = i[j]->width;
 194         h = i[j]->height;
 195         length = w * h;
 196
 197         /* Set up the internal state */
 198         a = b = c = 0xdeadbeef + (((guint32)length)<<2) + initval;
 199
 200         /*---------------------------------------- handle most of the key */
 201         while (length > 3)
 202         {
 203             a += k[0];
 204             b += k[1];
 205             c += k[2];
 206             mix(a,b,c);
 207             length -= 3;
 208             k += 3;
 209         }
 210
 211         /*--------------------------------- handle the last 3 uint32_t's */
 212         switch(length)           /* all the case statements fall through */
 213         {
 214         case 3 : c+=k[2];
 215         case 2 : b+=k[1];
 216         case 1 : a+=k[0];
 217             final(a,b,c);
 218         case 0:     /* case 0: nothing left to add */
 219             break;
 220         }
 221         /*------------------------------------ report the result */
 222         printf("image[%d] %ux%u %lu\n", j, w, h, c);
 223     }
 224
 225     win = XCreateSimpleWindow(d, RootWindow(d, s), 0, 0, winw, winh,
 226                               0, 0, 0);
 227     assert(win);
 228     XMapWindow(d, win);
 229
 230     p = XCreatePixmap(d, win, winw, winh, DefaultDepth(d, s));
 231     XFillRectangle(d, p, DefaultGC(d, s), 0, 0, winw, winh);
 232
 233     for (j = 0; j < image; ++j) {
 234         static unsigned int x = 0;
 235
 236         XPutImage(d, p, DefaultGC(d, s), i[j], 0, 0, x, 0,
 237                   i[j]->width, i[j]->height);
 238         x += i[j]->width;
 239         XDestroyImage(i[j]);
 240     }
 241
 242     XSetWindowBackgroundPixmap(d, win, p);
 243     XClearWindow(d, win);
 244
 245     XFlush(d);
 246
 247     getchar();
 248
 249     XFreePixmap(d, p);
 250     XCloseDisplay(d);
 251 }