dwm/patch/bar_winicon.c

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static uint32_t prealpha(uint32_t p) {
uint8_t a = p >> 24u;
uint32_t rb = (a * (p & 0xFF00FFu)) >> 8u;
uint32_t g = (a * (p & 0x00FF00u)) >> 8u;
return (rb & 0xFF00FFu) | (g & 0x00FF00u) | (a << 24u);
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}
Picture
geticonprop(Window win, unsigned int *picw, unsigned int *pich)
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{
int format;
unsigned long n, extra, *p = NULL;
Atom real;
if (XGetWindowProperty(dpy, win, netatom[NetWMIcon], 0L, LONG_MAX, False, AnyPropertyType,
&real, &format, &n, &extra, (unsigned char **)&p) != Success)
return None;
if (n == 0 || format != 32) { XFree(p); return None; }
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unsigned long *bstp = NULL;
uint32_t w, h, sz;
{
unsigned long *i; const unsigned long *end = p + n;
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uint32_t bstd = UINT32_MAX, d, m;
for (i = p; i < end - 1; i += sz) {
if ((w = *i++) >= 16384 || (h = *i++) >= 16384) { XFree(p); return None; }
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if ((sz = w * h) > end - i) break;
if ((m = w > h ? w : h) >= ICONSIZE && (d = m - ICONSIZE) < bstd) { bstd = d; bstp = i; }
}
if (!bstp) {
for (i = p; i < end - 1; i += sz) {
if ((w = *i++) >= 16384 || (h = *i++) >= 16384) { XFree(p); return None; }
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if ((sz = w * h) > end - i) break;
if ((d = ICONSIZE - (w > h ? w : h)) < bstd) { bstd = d; bstp = i; }
}
}
if (!bstp) { XFree(p); return None; }
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}
if ((w = *(bstp - 2)) == 0 || (h = *(bstp - 1)) == 0) { XFree(p); return None; }
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uint32_t icw, ich;
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if (w <= h) {
ich = ICONSIZE; icw = w * ICONSIZE / h;
if (icw == 0) icw = 1;
}
else {
icw = ICONSIZE; ich = h * ICONSIZE / w;
if (ich == 0) ich = 1;
}
*picw = icw; *pich = ich;
uint32_t i, *bstp32 = (uint32_t *)bstp;
for (sz = w * h, i = 0; i < sz; ++i) bstp32[i] = prealpha(bstp[i]);
Picture ret = drw_picture_create_resized(drw, (char *)bstp, w, h, icw, ich);
XFree(p);
return ret;
}
Picture
drw_picture_create_resized(Drw *drw, char *src, unsigned int srcw, unsigned int srch, unsigned int dstw, unsigned int dsth) {
Pixmap pm;
Picture pic;
GC gc;
if (srcw <= (dstw << 1u) && srch <= (dsth << 1u)) {
XImage img = {
srcw, srch, 0, ZPixmap, src,
ImageByteOrder(drw->dpy), BitmapUnit(drw->dpy), BitmapBitOrder(drw->dpy), 32,
32, 0, 32,
0, 0, 0
};
XInitImage(&img);
pm = XCreatePixmap(drw->dpy, drw->root, srcw, srch, 32);
gc = XCreateGC(drw->dpy, pm, 0, NULL);
XPutImage(drw->dpy, pm, gc, &img, 0, 0, 0, 0, srcw, srch);
XFreeGC(drw->dpy, gc);
pic = XRenderCreatePicture(drw->dpy, pm, XRenderFindStandardFormat(drw->dpy, PictStandardARGB32), 0, NULL);
XFreePixmap(drw->dpy, pm);
XRenderSetPictureFilter(drw->dpy, pic, FilterBilinear, NULL, 0);
XTransform xf;
xf.matrix[0][0] = (srcw << 16u) / dstw; xf.matrix[0][1] = 0; xf.matrix[0][2] = 0;
xf.matrix[1][0] = 0; xf.matrix[1][1] = (srch << 16u) / dsth; xf.matrix[1][2] = 0;
xf.matrix[2][0] = 0; xf.matrix[2][1] = 0; xf.matrix[2][2] = 65536;
XRenderSetPictureTransform(drw->dpy, pic, &xf);
} else {
Imlib_Image origin = imlib_create_image_using_data(srcw, srch, (DATA32 *)src);
if (!origin) return None;
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imlib_context_set_image(origin);
imlib_image_set_has_alpha(1);
Imlib_Image scaled = imlib_create_cropped_scaled_image(0, 0, srcw, srch, dstw, dsth);
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imlib_free_image_and_decache();
if (!scaled) return None;
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imlib_context_set_image(scaled);
imlib_image_set_has_alpha(1);
XImage img = {
dstw, dsth, 0, ZPixmap, (char *)imlib_image_get_data_for_reading_only(),
ImageByteOrder(drw->dpy), BitmapUnit(drw->dpy), BitmapBitOrder(drw->dpy), 32,
32, 0, 32,
0, 0, 0
};
XInitImage(&img);
pm = XCreatePixmap(drw->dpy, drw->root, dstw, dsth, 32);
gc = XCreateGC(drw->dpy, pm, 0, NULL);
XPutImage(drw->dpy, pm, gc, &img, 0, 0, 0, 0, dstw, dsth);
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imlib_free_image_and_decache();
XFreeGC(drw->dpy, gc);
pic = XRenderCreatePicture(drw->dpy, pm, XRenderFindStandardFormat(drw->dpy, PictStandardARGB32), 0, NULL);
XFreePixmap(drw->dpy, pm);
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}
return pic;
}
void
drw_pic(Drw *drw, int x, int y, unsigned int w, unsigned int h, Picture pic)
{
if (!drw)
return;
XRenderComposite(drw->dpy, PictOpOver, pic, None, drw->picture, 0, 0, 0, 0, x, y, w, h);
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}
void
freeicon(Client *c)
{
if (c->icon) {
XRenderFreePicture(dpy, c->icon);
c->icon = None;
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}
}
void
updateicon(Client *c)
{
freeicon(c);
c->icon = geticonprop(c->win, &c->icw, &c->ich);
}