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/>.
24 #if !X_DISPLAY_MISSING
25 # include <X11/Intrinsic.h>
26 # include <X11/Xatom.h>
30 static unsigned long scale16to8(unsigned x)
32 return x*0xfful / 0xffff;
35 static unsigned long wm_pixel(const XColor *c)
38 | scale16to8(c->red) << 16
39 | scale16to8(c->green) << 8
40 | scale16to8(c->blue);
44 * The 16x16 icon is drawn with 1px shadow, 6x6 tiles, with 1 pixel cropped off
47 void ewmh_tile16(unsigned long *icon, const XColor *c, int tile_x, int tile_y)
49 int out_x, out_y, out_w, x, y;
52 out_x = tile_x * 11 / 2;
53 out_y = tile_y * 11 / 2;
54 out_w = (5 + (tile_x == 1)) * sizeof row[0];
56 for (y = 0+(tile_y == 0); y < 6-(tile_y == 2); y++) {
57 for (x = 0+(tile_x == 0); x < 6-(tile_x==2); x++) {
59 row[x] = wm_pixel(&c[COLOUR_LIGHT]);
60 else if (x == 5 || y == 5)
61 row[x] = wm_pixel(&c[COLOUR_DARK]);
63 row[x] = wm_pixel(&c[COLOUR_PRIMARY]);
65 memcpy(&icon[16 * out_y++ + out_x], &row[tile_x == 0], out_w);
70 * The 24x24 icon is drawn with 1px shadow and 8x8 tiles.
72 void ewmh_tile24(unsigned long *icon, const XColor *c, int tile_x, int tile_y)
74 int out_x, out_y, x, y;
80 for (y = 0; y < 8; y++) {
81 for (x = 0; x < 8; x++) {
83 row[x] = wm_pixel(&c[COLOUR_LIGHT]);
84 else if (x == 7 || y == 7)
85 row[x] = wm_pixel(&c[COLOUR_DARK]);
87 row[x] = wm_pixel(&c[COLOUR_PRIMARY]);
89 memcpy(&icon[24 * out_y++ + out_x], row, sizeof row);
94 * The 32x32 icon is drawn with 1px shadow with slightly uneven tiles on
95 * an 11-10-11 pixel grid.
97 void ewmh_tile32(unsigned long *icon, const XColor *c, int tile_x, int tile_y)
99 int out_x, out_y, out_w, out_h, x, y;
100 unsigned long row[11];
102 out_x = 10*tile_x + (tile_x > 0);
103 out_y = 10*tile_y + (tile_y > 0);
104 out_w = 10 + (tile_x != 1);
105 out_h = 10 + (tile_y != 1);
107 for (y = 0; y < out_h; y++) {
108 for (x = 0; x < out_w; x++) {
109 if (x == 0 || y == 0)
110 row[x] = wm_pixel(&c[COLOUR_LIGHT]);
111 else if (x == out_w-1 || y == out_h-1)
112 row[x] = wm_pixel(&c[COLOUR_DARK]);
114 row[x] = wm_pixel(&c[COLOUR_PRIMARY]);
116 memcpy(&icon[32 * out_y++ + out_x], row, out_w * sizeof row[0]);
121 * The 48x48 icon is drawn with 2px shadow and 16x16 tiles.
123 void ewmh_tile48(unsigned long *icon, const XColor *c, int tile_x, int tile_y)
125 int out_x, out_y, x, y;
126 unsigned long row[16];
131 for (y = 0; y < 16; y++) {
132 for (x = 0; x < 16; x++) {
133 if (x == 0 || y == 0)
134 row[x] = wm_pixel(&c[COLOUR_LIGHT]);
135 else if (x == 15 || y == 15)
136 row[x] = wm_pixel(&c[COLOUR_DARK]);
137 else if (x == 1 || y == 1)
138 row[x] = wm_pixel(&c[COLOUR_LIGHT]);
139 else if (x == 14 || y == 14)
140 row[x] = wm_pixel(&c[COLOUR_DARK]);
142 row[x] = wm_pixel(&c[COLOUR_PRIMARY]);
144 memcpy(&icon[48 * out_y++ + out_x], row, sizeof row);
148 void *ewmh_icon_alloc(unsigned long **sizes)
152 buf = calloc(sizeof *buf, EWMH_ICON_NELEM);
154 sizes[ICON_16x16] = buf;
155 *sizes[ICON_16x16]++ = 16;
156 *sizes[ICON_16x16]++ = 16;
158 sizes[ICON_24x24] = sizes[ICON_16x16] + 16*16;
159 *sizes[ICON_24x24]++ = 24;
160 *sizes[ICON_24x24]++ = 24;
162 sizes[ICON_32x32] = sizes[ICON_24x24] + 24*24;
163 *sizes[ICON_32x32]++ = 32;
164 *sizes[ICON_32x32]++ = 32;
166 sizes[ICON_48x48] = sizes[ICON_32x32] + 32*32;
167 *sizes[ICON_48x48]++ = 48;
168 *sizes[ICON_48x48]++ = 48;
174 #if !X_DISPLAY_MISSING
177 * EWMH-supporting window managers that handle _NET_WM_ICON add this atom to
178 * the _NET_SUPPORTED list on the root window. Look for that and return 1
179 * if it is found, or 0 otherwise.
181 int ewmh_probe_wm_icon(Widget shell)
183 Display *display = XtDisplay(shell);
184 Screen *screen = XtScreen(shell);
185 Window root = RootWindowOfScreen(screen);
186 Atom net_supported, net_wm_icon, type;
188 unsigned long offset = 0, i, nitems, bytes_after, *props;
189 unsigned char *prop_return;
192 net_wm_icon = XInternAtom(display, "_NET_WM_ICON", 0);
193 net_supported = XInternAtom(display, "_NET_SUPPORTED", 0);
195 XGetWindowProperty(display, root, net_supported, offset, 10,
196 0, XA_ATOM, &type, &format,
197 &nitems, &bytes_after,
200 if (format != 32 || type != XA_ATOM)
204 props = (void *)prop_return;
205 for (i = 0; i < nitems; i++) {
206 if (props[i] == net_wm_icon) {
210 } while (nitems > 0 && bytes_after > 0);