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Add option to change alpha

Browse Source 
https://st.suckless.org/patches/changealpha/
This commit is contained in:
Przemek Grondek 2023-10-14 02:15:43 +02:00
parent 693e5b5ae0
commit a32f6523c2
5 changed files with 225 additions and 0 deletions
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4
config.def.h
View File

@ -107,6 +107,7 @@ unsigned int tabspaces = 8;
/* bg opacity */
float alpha = 0.8;
float alpha_def;
/* Terminal colors (16 first used in escape sequence) */
static const char *colorname[] = {
@ -218,6 +219,9 @@ static Shortcut shortcuts[] = {
{ ShiftMask, XK_Page_Down, kscrolldown, {.i = -1} },
{ ShiftMask, XK_Insert, selpaste, {.i = 0} },
{ TERMMOD, XK_Num_Lock, numlock, {.i = 0} },
{ MODKEY, XK_bracketleft, chgalpha, {.f = -1} }, /* Decrease opacity */
{ MODKEY|ShiftMask, XK_braceright, chgalpha, {.f = +1} }, /* Increase opacity */
{ MODKEY, XK_bracketright,chgalpha, {.f = 0} }, /* Reset opacity */
};
/*

4
config.h
View File

@ -112,6 +112,7 @@ unsigned int tabspaces = 8;
/* bg opacity */
float alpha = 0.85;
float alpha_def;
/* Terminal colors (16 first used in escape sequence) */
static const char *colorname[] = {
@ -221,6 +222,9 @@ static Shortcut shortcuts[] = {
{ ShiftMask, XK_Page_Down, kscrolldown, {.i = -1} },
{ ShiftMask, XK_Insert, selpaste, {.i = 0} },
{ TERMMOD, XK_Num_Lock, numlock, {.i = 0} },
{ MODKEY, XK_bracketleft, chgalpha, {.f = -1} }, /* Decrease opacity */
{ MODKEY|ShiftMask, XK_braceright, chgalpha, {.f = +1} }, /* Increase opacity */
{ MODKEY, XK_bracketright,chgalpha, {.f = 0} }, /* Reset opacity */
};
/*

194
patches/st-alpha-changealpha-20230519-b44f2ad.diff Normal file
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@ -0,0 +1,194 @@
diff --git a/st/config.def.h b/st_patched/config.def.h
index 91ab8ca..59fc2a9 100644
--- a/config.def.h
+++ b/config.def.h
@@ -93,6 +93,10 @@ char *termname = "st-256color";
*/
unsigned int tabspaces = 8;
+/* bg opacity */
+float alpha = 0.8;
+float alpha_def;
+
/* Terminal colors (16 first used in escape sequence) */
static const char *colorname[] = {
/* 8 normal colors */
@@ -201,6 +205,9 @@ static Shortcut shortcuts[] = {
{ TERMMOD, XK_Y, selpaste, {.i = 0} },
{ ShiftMask, XK_Insert, selpaste, {.i = 0} },
{ TERMMOD, XK_Num_Lock, numlock, {.i = 0} },
+ { MODKEY, XK_bracketleft, chgalpha, {.f = -1} }, /* Decrease opacity */
+ { MODKEY|ShiftMask, XK_braceright, chgalpha, {.f = +1} }, /* Increase opacity */
+ { MODKEY, XK_bracketright,chgalpha, {.f = 0} }, /* Reset opacity */
};
/*
diff --git a/st/st.h b/st_patched/st.h
index fd3b0d8..cda8c13 100644
--- a/st.h
+++ b/st.h
@@ -124,3 +124,4 @@ extern unsigned int tabspaces;
extern unsigned int defaultfg;
extern unsigned int defaultbg;
extern unsigned int defaultcs;
+extern float alpha, alpha_def;
diff --git a/st/config.mk b/st_patched/config.mk
index 1e306f8..47c615e 100644
--- a/config.mk
+++ b/config.mk
@@ -16,7 +16,7 @@ PKG_CONFIG = pkg-config
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/x.c b/st_patched/x.c
index aa09997..3b05a55 100644
--- a/x.c
+++ b/x.c
@@ -59,6 +59,7 @@ static void zoom(const Arg *);
static void zoomabs(const Arg *);
static void zoomreset(const Arg *);
static void ttysend(const Arg *);
+static void chgalpha(const Arg *);
/* config.h for applying patches and the configuration. */
#include "config.h"
@@ -105,6 +106,7 @@ 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;
@@ -243,6 +245,7 @@ static char *usedfont = NULL;
static double usedfontsize = 0;
static double defaultfontsize = 0;
+static char *opt_alpha = NULL;
static char *opt_class = NULL;
static char **opt_cmd = NULL;
static char *opt_embed = NULL;
@@ -752,7 +755,7 @@ 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);
@@ -812,6 +815,13 @@ xloadcols(void)
else
die("could not allocate color %d\n", i);
}
+
+ /* set alpha value of bg color */
+ if (opt_alpha)
+ alpha = strtof(opt_alpha, NULL);
+ 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;
}
@@ -1134,11 +1144,23 @@ xinit(int cols, int rows)
Window parent;
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);
+
+ if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0)))) {
+ parent = XRootWindow(xw.dpy, xw.scr);
+ xw.depth = 32;
+ } else {
+ XGetWindowAttributes(xw.dpy, parent, &attr);
+ xw.depth = attr.depth;
+ }
+
+ XMatchVisualInfo(xw.dpy, xw.scr, xw.depth, TrueColor, &vis);
+ xw.vis = vis.visual;
/* font */
if (!FcInit())
@@ -1147,8 +1169,11 @@ xinit(int cols, int rows)
usedfont = (opt_font == NULL)? font : opt_font;
xloadfonts(usedfont, 0);
+ /* Backup default alpha value */
+ alpha_def = alpha;
+
/* colors */
- xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
+ xw.cmap = XCreateColormap(xw.dpy, parent, xw.vis, None);
xloadcols();
/* adjust fixed window geometry */
@@ -1168,19 +1193,15 @@ xinit(int cols, int rows)
| ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
xw.attrs.colormap = xw.cmap;
- 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, xw.buf, GCGraphicsExposures, &gcvalues);
XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
@@ -1371,6 +1392,24 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x
return numspecs;
}
+void
+chgalpha(const Arg *arg)
+{
+ if (arg->f == -1.0f && alpha >= 0.1f)
+ alpha -= 0.1f;
+ else if (arg->f == 1.0f && alpha < 1.0f)
+ alpha += 0.1f;
+ else if (arg->f == 0.0f)
+ alpha = alpha_def;
+ else
+ return;
+
+ dc.col[defaultbg].color.alpha = (unsigned short)(0xFFFF * alpha);
+ /* Required to remove artifacting from borderpx */
+ cresize(0, 0);
+ redraw();
+}
+
void
xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
{
@@ -2038,6 +2077,9 @@ main(int argc, char *argv[])
case 'a':
allowaltscreen = 0;
break;
+ case 'A':
+ opt_alpha = EARGF(usage());
+ break;
case 'c':
opt_class = EARGF(usage());
break;

1
st.h
View File

@ -137,5 +137,6 @@ extern unsigned int tabspaces;
extern unsigned int defaultfg;
extern unsigned int defaultbg;
extern unsigned int defaultcs;
extern float alpha, alpha_def;
extern const int boxdraw, boxdraw_bold, boxdraw_braille;
extern float alpha;

22
x.c
View File

@ -60,6 +60,7 @@ static void zoom(const Arg *);
static void zoomabs(const Arg *);
static void zoomreset(const Arg *);
static void ttysend(const Arg *);
static void chgalpha(const Arg *);
/* config.h for applying patches and the configuration. */
#include "config.h"
@ -1176,6 +1177,9 @@ xinit(int cols, int rows)
usedfont = (opt_font == NULL)? font : opt_font;
xloadfonts(usedfont, 0);
/* Backup default alpha value */
alpha_def = alpha;
/* colors */
xw.cmap = XCreateColormap(xw.dpy, parent, xw.vis, None);
xloadcols();
@ -1406,6 +1410,24 @@ xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x
return numspecs;
}
void
chgalpha(const Arg *arg)
{
if (arg->f == -1.0f && alpha >= 0.1f)
alpha -= 0.1f;
else if (arg->f == 1.0f && alpha < 1.0f)
alpha += 0.1f;
else if (arg->f == 0.0f)
alpha = alpha_def;
else
return;
dc.col[defaultbg].color.alpha = (unsigned short)(0xFFFF * alpha);
/* Required to remove artifacting from borderpx */
cresize(0, 0);
redraw();
}
void
xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
{