/*
* _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 .
*/
#include
#include
#include
#include
#if !X_DISPLAY_MISSING
# include
# include
#endif
#include "ewmhicon.h"
#include "colour.h"
#include "icon.h"
enum { ICON_16x16, ICON_24x24, ICON_32x32, ICON_48x48, ICON_MAX };
/*
* 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.
*/
static void *ewmh_icon_alloc(unsigned long **sizes)
{
unsigned long *buf;
buf = calloc(sizeof *buf, EWMH_ICON_NELEM);
if (buf) {
sizes[ICON_16x16] = buf;
*sizes[ICON_16x16]++ = 16;
*sizes[ICON_16x16]++ = 16;
sizes[ICON_24x24] = sizes[ICON_16x16] + 16*16;
*sizes[ICON_24x24]++ = 24;
*sizes[ICON_24x24]++ = 24;
sizes[ICON_32x32] = sizes[ICON_24x24] + 24*24;
*sizes[ICON_32x32]++ = 32;
*sizes[ICON_32x32]++ = 32;
sizes[ICON_48x48] = sizes[ICON_32x32] + 32*32;
*sizes[ICON_48x48]++ = 48;
*sizes[ICON_48x48]++ = 48;
}
return buf;
}
static unsigned long scale16to8(unsigned x)
{
return x*0xfful / 0xffff;
}
static unsigned long wm_pixel(const XColor *c)
{
return 0xff000000
| scale16to8(c->red) << 16
| scale16to8(c->green) << 8
| scale16to8(c->blue);
}
static void do_remap(void *icon, unsigned size, const XColor *map)
{
unsigned char *index = icon;
unsigned long *argb = icon;
unsigned i, count = size*size;
for (i = 0; i < count; i++) {
argb[count-i-1] = wm_pixel(map + index[count-i-1]);
}
}
void *ewmh_icon_generate(const unsigned long *seq, const XColor *map)
{
unsigned long *buf, *sizes[ICON_MAX];
unsigned i, j;
buf = ewmh_icon_alloc(sizes);
if (!buf)
return NULL;
for (i = 0; i < 9; i++) {
unsigned x = i%3, y = i/3;
icon_tile16((void *)sizes[ICON_16x16], seq[i], x, y);
icon_tile24((void *)sizes[ICON_24x24], seq[i], x, y);
icon_tile32((void *)sizes[ICON_32x32], seq[i], x, y);
icon_tile48((void *)sizes[ICON_48x48], seq[i], x, y);
}
for (i = 0; i < ICON_MAX; i++) {
/* Produces the sequence 16, 24, 32, 48 */
unsigned size = 16 + (1u< 0 && bytes_after > 0);
return 0;
}
#endif