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diff --git a/config.def.h b/config.def.h
index feec7e2..e373018 100644
--- a/config.def.h
+++ b/config.def.h
@@ -82,6 +82,9 @@ char *termname = "st-256color";
*/
unsigned int tabspaces = 8;
+/* bg opacity */
+unsigned int alpha = 0xcd;
+
/* Terminal colors (16 first used in escape sequence) */
static const char *colorname[] = {
/* 8 normal colors */
diff --git a/config.mk b/config.mk
index 039c42c..3b00d7e 100644
--- a/config.mk
+++ b/config.mk
@@ -14,7 +14,7 @@ X11LIB = /usr/X11R6/lib
INCS = -I$(X11INC) \
`pkg-config --cflags fontconfig` \
`pkg-config --cflags freetype2`
-LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft \
+LIBS = -L${X11LIB} -lm -lrt -lX11 -lutil -lXft -lXrender \
`pkg-config --libs fontconfig` \
`pkg-config --libs freetype2`
diff --git a/st.h b/st.h
index cdd25ae..850c5f0 100644
--- a/st.h
+++ b/st.h
@@ -134,6 +134,7 @@ extern char *worddelimiters;
extern int allowaltscreen;
extern char *termname;
extern unsigned int tabspaces;
+extern unsigned int alpha;
extern unsigned int defaultfg;
extern unsigned int defaultbg;
extern MouseKey mkeys[];
diff --git a/win.h b/win.h
index 31f327d..d277477 100644
--- a/win.h
+++ b/win.h
@@ -23,6 +23,10 @@ enum win_mode {
|MODE_MOUSEMANY,
};
+/* alpha */
+#define OPAQUE 0Xff
+#define USE_ARGB (alpha != OPAQUE && opt_embed == NULL)
+
void xbell(void);
void xclipcopy(void);
void xdrawcursor(int, int, Glyph, int, int, Glyph);
diff --git a/x.c b/x.c
index f4a6be7..840d2fa 100644
--- a/x.c
+++ b/x.c
@@ -99,6 +99,7 @@ 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;
@@ -698,7 +699,7 @@ 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);
@@ -758,6 +759,13 @@ xloadcols(void)
else
die("Could not allocate color %d\n", i);
}
+
+ /* set alpha value of bg color */
+ if (USE_ARGB) {
+ dc.col[defaultbg].color.alpha = (0xffff * alpha) / OPAQUE;
+ dc.col[defaultbg].pixel &= 0x00111111;
+ dc.col[defaultbg].pixel |= alpha << 24;
+ }
loaded = 1;
}
@@ -779,6 +787,17 @@ xsetcolorname(int x, const char *name)
return 0;
}
+void
+xtermclear(int col1, int row1, int col2, int row2)
+{
+ XftDrawRect(xw.draw,
+ &dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
+ borderpx + col1 * win.cw,
+ borderpx + row1 * win.ch,
+ (col2-col1+1) * win.cw,
+ (row2-row1+1) * win.ch);
+}
+
/*
* Absolute coordinates.
*/
@@ -1018,7 +1037,40 @@ xinit(int cols, int rows)
if (!(xw.dpy = XOpenDisplay(NULL)))
die("Can't open display\n");
xw.scr = XDefaultScreen(xw.dpy);
- xw.vis = XDefaultVisual(xw.dpy, xw.scr);
+ xw.depth = (USE_ARGB) ? 32: XDefaultDepth(xw.dpy, xw.scr);
+ if (!USE_ARGB)
+ xw.vis = XDefaultVisual(xw.dpy, xw.scr);
+ else {
+ XVisualInfo *vis;
+ XRenderPictFormat *fmt;
+ int nvi;
+ int i;
+
+ XVisualInfo tpl = {
+ .screen = xw.scr,
+ .depth = 32,
+ .class = TrueColor
+ };
+
+ vis = XGetVisualInfo(xw.dpy,
+ VisualScreenMask | VisualDepthMask | VisualClassMask,
+ &tpl, &nvi);
+ xw.vis = NULL;
+ for (i = 0; i < nvi; i++) {
+ fmt = XRenderFindVisualFormat(xw.dpy, vis[i].visual);
+ if (fmt->type == PictTypeDirect && fmt->direct.alphaMask) {
+ xw.vis = vis[i].visual;
+ break;
+ }
+ }
+
+ XFree(vis);
+
+ if (!xw.vis) {
+ fprintf(stderr, "Couldn't find ARGB visual.\n");
+ exit(1);
+ }
+ }
/* font */
if (!FcInit())
@@ -1028,7 +1080,11 @@ xinit(int cols, int rows)
xloadfonts(usedfont, 0);
/* colors */
- xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
+ if (!USE_ARGB)
+ xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
+ else
+ xw.cmap = XCreateColormap(xw.dpy, XRootWindow(xw.dpy, xw.scr),
+ xw.vis, None);
xloadcols();
/* adjust fixed window geometry */
@@ -1051,16 +1107,15 @@ xinit(int cols, int rows)
if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
parent = XRootWindow(xw.dpy, xw.scr);
xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
- win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
+ win.w, win.h, 0, xw.depth, InputOutput,
xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
| CWEventMask | CWColormap, &xw.attrs);
memset(&gcvalues, 0, sizeof(gcvalues));
gcvalues.graphics_exposures = False;
- dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
- &gcvalues);
- xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
- DefaultDepth(xw.dpy, xw.scr));
+ xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h, xw.depth);
+ dc.gc = XCreateGC(xw.dpy, (USE_ARGB) ? xw.buf: parent,
+ GCGraphicsExposures, &gcvalues);
XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
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