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patch: alpha

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This commit is contained in:
Sam Hoffman
2026-01-05 21:51:28 -05:00
parent 2900f20078
commit aecf3959eb
2 changed files with 38 additions and 9 deletions
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3
config.def.h
View File

@@ -99,6 +99,9 @@ char *termname = "st-256color";
*/
unsigned int tabspaces = 8;
/* bg opacity */
float alpha = 0.8;
/* Terminal colors (16 first used in escape sequence) */
static const char *colorname[] = {
/* 8 normal colors */

44
x.c
View File

@@ -111,6 +111,7 @@ typedef struct {
XSetWindowAttributes attrs;
int scr;
int isfixed; /* is fixed geometry? */
int depth; /* bit depth */
int l, t; /* left and top offset */
int gm; /* geometry mask */
} XWindow;
@@ -774,7 +775,7 @@ xresize(int col, int row)
XFreePixmap(xw.dpy, xw.buf);
xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
DefaultDepth(xw.dpy, xw.scr));
xw.depth);
XftDrawChange(xw.draw, xw.buf);
xclear(0, 0, win.w, win.h);
@@ -834,6 +835,10 @@ xloadcols(void)
else
die("could not allocate color %d\n", i);
}
dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * alpha);
dc.col[defaultbg].pixel &= 0x00FFFFFF;
dc.col[defaultbg].pixel |= (unsigned char)(0xff * alpha) << 24;
loaded = 1;
}
@@ -864,6 +869,12 @@ xsetcolorname(int x, const char *name)
XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
dc.col[x] = ncolor;
if (x == defaultbg) {
dc.col[defaultbg].color.alpha = (unsigned short)(0xffff * alpha);
dc.col[defaultbg].pixel &= 0x00FFFFFF;
dc.col[defaultbg].pixel |= (unsigned char)(0xff * alpha) << 24;
}
return 0;
}
@@ -1159,11 +1170,25 @@ xinit(int cols, int rows)
Window parent, root;
pid_t thispid = getpid();
XColor xmousefg, xmousebg;
XWindowAttributes attr;
XVisualInfo vis;
if (!(xw.dpy = XOpenDisplay(NULL)))
die("can't open display\n");
xw.scr = XDefaultScreen(xw.dpy);
xw.vis = XDefaultVisual(xw.dpy, xw.scr);
root = XRootWindow(xw.dpy, xw.scr);
if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
parent = root;
if (XMatchVisualInfo(xw.dpy, xw.scr, 32, TrueColor, &vis) != 0) {
xw.vis = vis.visual;
xw.depth = vis.depth;
} else {
XGetWindowAttributes(xw.dpy, parent, &attr);
xw.vis = attr.visual;
xw.depth = attr.depth;
}
/* font */
if (!FcInit())
@@ -1173,7 +1198,7 @@ xinit(int cols, int rows)
xloadfonts(usedfont, 0);
/* colors */
xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
xw.cmap = XCreateColormap(xw.dpy, parent, xw.vis, None);
xloadcols();
/* adjust fixed window geometry */
@@ -1193,11 +1218,8 @@ xinit(int cols, int rows)
| ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
xw.attrs.colormap = xw.cmap;
root = XRootWindow(xw.dpy, xw.scr);
if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
parent = root;
xw.win = XCreateWindow(xw.dpy, root, xw.l, xw.t,
win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
win.w, win.h, 0, xw.depth, InputOutput,
xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
| CWEventMask | CWColormap, &xw.attrs);
if (parent != root)
@@ -1208,7 +1230,7 @@ xinit(int cols, int rows)
dc.gc = XCreateGC(xw.dpy, xw.win, GCGraphicsExposures,
&gcvalues);
xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
DefaultDepth(xw.dpy, xw.scr));
xw.depth);
XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
@@ -2098,6 +2120,10 @@ main(int argc, char *argv[])
case 'a':
allowaltscreen = 0;
break;
case 'A':
alpha = strtof(EARGF(usage()), NULL);
LIMIT(alpha, 0.0, 1.0);
break;
case 'c':
opt_class = EARGF(usage());
break;