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