2 * _NET_WM_ICON helpers for slide puzzle game
3 * Copyright © 2022 Nick Bowler
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <https://www.gnu.org/licenses/>.
23 * Define X_DISPLAY_MISSING to allow building without X11 (for test purposes)
25 #if !X_DISPLAY_MISSING
26 # include <X11/Intrinsic.h>
29 /* Stub types to allow compilation */
32 unsigned short red, green, blue;
35 typedef struct stub_widget *Widget;
40 * Helpers for drawing window icons in various sizes. The tileXX functions
41 * draw one (out of 9) tiles at a particular size using a particular colour
42 * set. Call for each tile position to draw a complete icon.
44 enum { ICON_16x16, ICON_24x24, ICON_32x32, ICON_48x48, ICON_MAX };
45 #define EWMH_ICON_NELEM (2+16*16 + 2+24*24 + 2+32*32 + 2+48*48)
47 void ewmh_tile16(unsigned long *icon, const XColor *c, int tile_x, int tile_y);
48 void ewmh_tile24(unsigned long *icon, const XColor *c, int tile_x, int tile_y);
49 void ewmh_tile32(unsigned long *icon, const XColor *c, int tile_x, int tile_y);
50 void ewmh_tile48(unsigned long *icon, const XColor *c, int tile_x, int tile_y);
53 * Allocate storage for the EWMH _NET_WM_ICON array. The sizes array is
54 * populated with pointers to the beginning of each icon's pixel data. For
55 * example, sizes[ICON_24x24] points to the first pixel of the 24x24 image.
57 * The returned value can then be passed to XChangeProperty to set the icon,
58 * (use EWMH_ICON_NELEM for the number of elements) and must be freed by the
61 void *ewmh_icon_alloc(unsigned long **sizes);
64 * Check if the root window indicates support for EWMH icons. Returns 1 if
65 * supported, or 0 otherwise.
67 int ewmh_probe_wm_icon(Widget shell);