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commit 4060b0312c8894bfa8c2ce8ef66e5bbca01d995e
parent 97f46c3bad8b08cd8ae8a803cd16f54684c14c3b
Author: Àlex Ramírez <aramirez@posteo.net>
Date:   Sat, 16 Jun 2018 19:27:58 +0200

Fixed st/alpha patch for colors other than pure black.

alpha patch for st 0.8.1 did not work well for background colors other than pure black. For white it didn't work at all (background was always opaque, regardless of alpha setting).

This patch is based on the 0.8.1 patch, with only 3 or 4 lines changed.

Had to give my patch file a non-standard name because the standard nomenclature does not allow more than one patch per release and didn't want to overwrite the original.

Diffstat:
st.suckless.org/patches/alpha/index.md | 2++
st.suckless.org/patches/alpha/st-alpha-20180616-0.8.1.diff | 200+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 202 insertions(+), 0 deletions(-)

diff --git a/st.suckless.org/patches/alpha/index.md b/st.suckless.org/patches/alpha/index.md @@ -28,6 +28,7 @@ Download * [st-alpha-20170509-5a10aca.diff](st-alpha-20170509-5a10aca.diff) * [st-alpha-20171221-0ac685f.diff](st-alpha-20171221-0ac685f.diff) * [st-alpha-0.8.1.diff](st-alpha-0.8.1.diff) + * [st-alpha-20180616-0.8.1.diff](st-alpha-20180616-0.8.1.diff) Authors ------- @@ -38,3 +39,4 @@ Authors * Ivan J. - <parazyd@dyne.org> (git port) * Matthew Parnell - <matt@parnmatt.co.uk> (0.7 port) * Johannes Mayrhofer - <jm.spam@gmx.net> (0.8.1 port) + * Àlex Ramírez <aramirez@posteo.net> (0.8.1 pre-multiplication fix). diff --git a/st.suckless.org/patches/alpha/st-alpha-20180616-0.8.1.diff b/st.suckless.org/patches/alpha/st-alpha-20180616-0.8.1.diff @@ -0,0 +1,200 @@ +diff --git a/config.def.h b/config.def.h +index 82b1b09..2c721e8 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 = 0xcc; ++ + /* Terminal colors (16 first used in escape sequence) */ + static const char *colorname[] = { + /* 8 normal colors */ +@@ -109,6 +112,7 @@ static const char *colorname[] = { + /* more colors can be added after 255 to use with DefaultXX */ + "#cccccc", + "#555555", ++ "black", + }; + + +@@ -117,7 +121,7 @@ static const char *colorname[] = { + * foreground, background, cursor, reverse cursor + */ + unsigned int defaultfg = 7; +-unsigned int defaultbg = 0; ++unsigned int defaultbg = 257; + static unsigned int defaultcs = 256; + static unsigned int defaultrcs = 257; + +diff --git a/config.mk b/config.mk +index 039c42c..b1fa717 100644 +--- a/config.mk ++++ b/config.mk +@@ -11,10 +11,10 @@ X11INC = /usr/X11R6/include + X11LIB = /usr/X11R6/lib + + # includes and libs +-INCS = -I$(X11INC) \ ++INCS = -I. -I/usr/include -I${X11INC} \ + `pkg-config --cflags fontconfig` \ + `pkg-config --cflags freetype2` +-LIBS = -L$(X11LIB) -lm -lrt -lX11 -lutil -lXft \ ++LIBS = -L/usr/lib -lc -L${X11LIB} -lm -lrt -lX11 -lutil -lXft -lXrender\ + `pkg-config --libs fontconfig` \ + `pkg-config --libs freetype2` + +diff --git a/st.h b/st.h +index dac64d8..433c74f 100644 +--- a/st.h ++++ b/st.h +@@ -119,5 +119,6 @@ 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; +diff --git a/x.c b/x.c +index c343ba2..1d38efd 100644 +--- a/x.c ++++ b/x.c +@@ -48,6 +48,10 @@ typedef struct { + #define XK_NO_MOD 0 + #define XK_SWITCH_MOD (1<<13) + ++/* alpha */ ++#define OPAQUE 0Xff ++#define USE_ARGB (alpha != OPAQUE && opt_embed == NULL) ++ + /* function definitions used in config.h */ + static void clipcopy(const Arg *); + static void clippaste(const Arg *); +@@ -98,6 +102,7 @@ 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; +@@ -686,7 +691,7 @@ 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); + +@@ -746,6 +751,14 @@ 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 = alpha << 8; ++ dc.col[defaultbg].color.red = ((dc.col[defaultbg].color.red >> 8) * alpha / 255) << 8; ++ dc.col[defaultbg].color.green = ((dc.col[defaultbg].color.green >> 8) * alpha / 255) << 8; ++ dc.col[defaultbg].color.blue = ((dc.col[defaultbg].color.blue >> 8) * alpha / 255) << 8; ++ } + loaded = 1; + } + +@@ -767,6 +780,17 @@ 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. + */ +@@ -1005,7 +1029,40 @@ 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()) +@@ -1015,7 +1072,11 @@ 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 */ +@@ -1038,16 +1099,15 @@ 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); +