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 #include <X11/Intrinsic.h>
25 #include <X11/Xatom.h>
28 static unsigned long scale16to8(unsigned x)
30 return x*0xfful / 0xffff;
33 static unsigned long wm_pixel(const XColor *c)
36 | scale16to8(c->red) << 16
37 | scale16to8(c->green) << 8
38 | scale16to8(c->blue);
42 * The 16x16 icon is drawn with 1px shadow, 6x6 tiles, with 1 pixel cropped off
45 void ewmh_tile16(unsigned long *icon, const XColor *c, int tile_x, int tile_y)
47 int out_x, out_y, out_w, x, y;
50 out_x = tile_x * 11 / 2;
51 out_y = tile_y * 11 / 2;
52 out_w = (5 + (tile_x == 1)) * sizeof row[0];
54 for (y = 0+(tile_y == 0); y < 6-(tile_y == 2); y++) {
55 for (x = 0+(tile_x == 0); x < 6-(tile_x==2); x++) {
57 row[x] = wm_pixel(&c[COLOUR_LIGHT]);
58 else if (x == 5 || y == 5)
59 row[x] = wm_pixel(&c[COLOUR_DARK]);
61 row[x] = wm_pixel(&c[COLOUR_PRIMARY]);
63 memcpy(&icon[16 * out_y++ + out_x], &row[tile_x == 0], out_w);
68 * The 24x24 icon is drawn with 1px shadow and 8x8 tiles.
70 void ewmh_tile24(unsigned long *icon, const XColor *c, int tile_x, int tile_y)
72 int out_x, out_y, x, y;
78 for (y = 0; y < 8; y++) {
79 for (x = 0; x < 8; x++) {
81 row[x] = wm_pixel(&c[COLOUR_LIGHT]);
82 else if (x == 7 || y == 7)
83 row[x] = wm_pixel(&c[COLOUR_DARK]);
85 row[x] = wm_pixel(&c[COLOUR_PRIMARY]);
87 memcpy(&icon[24 * out_y++ + out_x], row, sizeof row);
92 * The 32x32 icon is drawn with 1px shadow with slightly uneven tiles on
93 * an 11-10-11 pixel grid.
95 void ewmh_tile32(unsigned long *icon, const XColor *c, int tile_x, int tile_y)
97 int out_x, out_y, out_w, out_h, x, y;
98 unsigned long row[11];
100 out_x = 10*tile_x + (tile_x > 0);
101 out_y = 10*tile_y + (tile_y > 0);
102 out_w = 10 + (tile_x != 1);
103 out_h = 10 + (tile_y != 1);
105 for (y = 0; y < out_h; y++) {
106 for (x = 0; x < out_w; x++) {
107 if (x == 0 || y == 0)
108 row[x] = wm_pixel(&c[COLOUR_LIGHT]);
109 else if (x == out_w-1 || y == out_h-1)
110 row[x] = wm_pixel(&c[COLOUR_DARK]);
112 row[x] = wm_pixel(&c[COLOUR_PRIMARY]);
114 memcpy(&icon[32 * out_y++ + out_x], row, out_w * sizeof row[0]);
119 * The 48x48 icon is drawn with 2px shadow and 16x16 tiles.
121 void ewmh_tile48(unsigned long *icon, const XColor *c, int tile_x, int tile_y)
123 int out_x, out_y, x, y;
124 unsigned long row[16];
129 for (y = 0; y < 16; y++) {
130 for (x = 0; x < 16; x++) {
131 if (x == 0 || y == 0)
132 row[x] = wm_pixel(&c[COLOUR_LIGHT]);
133 else if (x == 15 || y == 15)
134 row[x] = wm_pixel(&c[COLOUR_DARK]);
135 else if (x == 1 || y == 1)
136 row[x] = wm_pixel(&c[COLOUR_LIGHT]);
137 else if (x == 14 || y == 14)
138 row[x] = wm_pixel(&c[COLOUR_DARK]);
140 row[x] = wm_pixel(&c[COLOUR_PRIMARY]);
142 memcpy(&icon[48 * out_y++ + out_x], row, sizeof row);
146 int ewmh_probe_wm_icon(Widget shell)
148 Display *display = XtDisplay(shell);
149 Screen *screen = XtScreen(shell);
150 Window root = RootWindowOfScreen(screen);
151 Atom net_supported, net_wm_icon, type;
153 unsigned long offset = 0, i, nitems, bytes_after, *props;
154 unsigned char *prop_return;
157 net_wm_icon = XInternAtom(display, "_NET_WM_ICON", FALSE);
158 net_supported = XInternAtom(display, "_NET_SUPPORTED", FALSE);
160 XGetWindowProperty(display, root, net_supported, offset, 10,
161 FALSE, XA_ATOM, &type,
162 &format, &nitems, &bytes_after,
165 if (format != 32 || type != XA_ATOM)
169 props = (void *)prop_return;
170 for (i = 0; i < nitems; i++) {
171 if (props[i] == net_wm_icon) {
175 } while (nitems > 0 && bytes_after > 0);
180 void *ewmh_icon_alloc(unsigned long **sizes)
184 buf = calloc(sizeof *buf, EWMH_ICON_NELEM);
186 sizes[ICON_16x16] = buf;
187 *sizes[ICON_16x16]++ = 16;
188 *sizes[ICON_16x16]++ = 16;
190 sizes[ICON_24x24] = sizes[ICON_16x16] + 16*16;
191 *sizes[ICON_24x24]++ = 24;
192 *sizes[ICON_24x24]++ = 24;
194 sizes[ICON_32x32] = sizes[ICON_24x24] + 24*24;
195 *sizes[ICON_32x32]++ = 32;
196 *sizes[ICON_32x32]++ = 32;
198 sizes[ICON_48x48] = sizes[ICON_32x32] + 32*32;
199 *sizes[ICON_48x48]++ = 48;
200 *sizes[ICON_48x48]++ = 48;