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	st-background-image-0.8.4.diff (7073B)
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	1 From 2c984d74ca15806dcfa174b7e75f48c0d01a49bf Mon Sep 17 00:00:00 2001
	2 From: Matthias Schoth <[email protected]>
	3 Date: Thu, 17 Feb 2022 00:23:23 +0100
	4 Subject: [PATCH] Implements background image and pseudo transparancy sup…
	5
	6 ---
	7 config.def.h \| 8 +++
	8 x.c \| 141 +++++++++++++++++++++++++++++++++++++++++++++++----
	9 2 files changed, 139 insertions(+), 10 deletions(-)
	10
	11 diff --git a/config.def.h b/config.def.h
	12 index 6f05dce..3d352db 100644
	13 --- a/config.def.h
	14 +++ b/config.def.h
	15 @@ -8,6 +8,14 @@
	16 static char *font = "Liberation Mono:pixelsize=12:antialias=true:autohi…
	17 static int borderpx = 2;
	18
	19 +/*
	20 + * background image
	21 + * expects farbfeld format
	22 + * pseudo transparency fixes coordinates to the screen origin
	23 + */
	24 +static const char *bgfile = "/path/to/image.ff";
	25 +static const int pseudotransparency = 0;
	26 +
	27 /*
	28 * What program is execed by st depends of these precedence rules:
	29 * 1: program passed with -e
	30 diff --git a/x.c b/x.c
	31 index 210f184..5ecb8e5 100644
	32 --- a/x.c
	33 +++ b/x.c
	34 @@ -14,6 +14,7 @@
	35 #include <X11/keysym.h>
	36 #include <X11/Xft/Xft.h>
	37 #include <X11/XKBlib.h>
	38 +#include <arpa/inet.h>
	39
	40 char *argv0;
	41 #include "arg.h"
	42 @@ -81,6 +82,7 @@ typedef XftGlyphFontSpec GlyphFontSpec;
	43 typedef struct {
	44 int tw, th; /* tty width and height */
	45 int w, h; /* window width and height */
	46 + int x, y; /* window location */
	47 int ch; /* char height */
	48 int cw; /* char width */
	49 int mode; /* window state/mode flags */
	50 @@ -101,6 +103,7 @@ typedef struct {
	51 XVaNestedList spotlist;
	52 } ime;
	53 Draw draw;
	54 + GC bggc; /* Graphics Context for background */
	55 Visual *vis;
	56 XSetWindowAttributes attrs;
	57 int scr;
	58 @@ -151,6 +154,9 @@ static void ximinstantiate(Display *, XPointer, XPoi…
	59 static void ximdestroy(XIM, XPointer, XPointer);
	60 static int xicdestroy(XIC, XPointer, XPointer);
	61 static void xinit(int, int);
	62 +static void updatexy(void);
	63 +static XImage loadff(const char );
	64 +static void bginit();
	65 static void cresize(int, int);
	66 static void xresize(int, int);
	67 static void xhints(void);
	68 @@ -502,6 +508,12 @@ propnotify(XEvent *e)
	69 xpev->atom == clipboard)) {
	70 selnotify(e);
	71 }
	72 +
	73 + if (pseudotransparency &&
	74 + !strncmp(XGetAtomName(xw.dpy, e->xproperty.atom), "_NET_WM_…
	75 + updatexy();
	76 + redraw();
	77 + }
	78 }
	79
	80 void
	81 @@ -532,7 +544,8 @@ selnotify(XEvent *e)
	82 return;
	83 }
	84
	85 - if (e->type == PropertyNotify && nitems == 0 && rem == …
	86 + if (e->type == PropertyNotify && nitems == 0 && rem == …
	87 + !pseudotransparency) {
	88 /*
	89 * If there is some PropertyNotify with no data…
	90 * this is the signal of the selection owner th…
	91 @@ -550,9 +563,11 @@ selnotify(XEvent *e)
	92 * when the selection owner does send us the ne…
	93 * chunk of data.
	94 */
	95 - MODBIT(xw.attrs.event_mask, 1, PropertyChangeMa…
	96 - XChangeWindowAttributes(xw.dpy, xw.win, CWEvent…
	97 + if (!pseudotransparency) {
	98 + MODBIT(xw.attrs.event_mask, 1, Property…
	99 + XChangeWindowAttributes(xw.dpy, xw.win,…
	100 &xw.attrs);
	101 + }
	102
	103 /*
	104 * Deleting the property is the transfer start …
	105 @@ -820,9 +835,9 @@ xsetcolorname(int x, const char *name)
	106 void
	107 xclear(int x1, int y1, int x2, int y2)
	108 {
	109 - XftDrawRect(xw.draw,
	110 - &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defau…
	111 - x1, y1, x2-x1, y2-y1);
	112 + if (pseudotransparency)
	113 + XSetTSOrigin(xw.dpy, xw.bggc, -win.x, -win.y);
	114 + XFillRectangle(xw.dpy, xw.buf, xw.bggc, x1, y1, x2-x1, y2-y1);
	115 }
	116
	117 void
	118 @@ -1207,6 +1222,100 @@ xinit(int cols, int rows)
	119 xsel.xtarget = XA_STRING;
	120 }
	121
	122 +void
	123 +updatexy()
	124 +{
	125 + Window child;
	126 + XTranslateCoordinates(xw.dpy, xw.win, DefaultRootWindow(xw.dpy)…
	127 + &win.x, &win.y, &child);
	128 +}
	129 +
	130 +/*
	131 + * load farbfeld file to XImage
	132 + */
	133 +XImage*
	134 +loadff(const char *filename)
	135 +{
	136 + uint32_t i, hdr[4], w, h, size;
	137 + uint64_t *data;
	138 + FILE *f = fopen(filename, "rb");
	139 +
	140 + if (f == NULL) {
	141 + fprintf(stderr, "could not load background image.\n");
	142 + return NULL;
	143 + }
	144 +
	145 + if (fread(hdr, sizeof(*hdr), LEN(hdr), f) != LEN(hdr))
	146 + if (ferror(f)) {
	147 + fprintf(stderr, "fread:");
	148 + return NULL;
	149 + }
	150 + else {
	151 + fprintf(stderr, "fread: Unexpected end of file\…
	152 + return NULL;
	153 + }
	154 +
	155 + if (memcmp("farbfeld", hdr, sizeof("farbfeld") - 1)) {
	156 + fprintf(stderr, "Invalid magic value");
	157 + return NULL;
	158 + }
	159 +
	160 + w = ntohl(hdr[2]);
	161 + h = ntohl(hdr[3]);
	162 + size = w * h;
	163 + data = malloc(size * sizeof(uint64_t));
	164 +
	165 + if (fread(data, sizeof(uint64_t), size, f) != size)
	166 + if (ferror(f)) {
	167 + fprintf(stderr, "fread:");
	168 + return NULL;
	169 + }
	170 + else {
	171 + fprintf(stderr, "fread: Unexpected end of file"…
	172 + return NULL;
	173 + }
	174 +
	175 + fclose(f);
	176 +
	177 + for (i = 0; i < size; i++)
	178 + data[i] = (data[i] & 0x00000000000000FF) << 16 \|
	179 + (data[i] & 0x0000000000FF0000) >> 8 \|
	180 + (data[i] & 0x000000FF00000000) >> 32;
	181 +
	182 + XImage *xi = XCreateImage(xw.dpy, DefaultVisual(xw.dpy, xw.scr),
	183 + DefaultDepth(xw.dpy, xw.scr), ZPixm…
	184 + (char )data, w, h, 32, w 8);
	185 + xi->bits_per_pixel = 64;
	186 + return xi;
	187 +}
	188 +
	189 +/*
	190 + * initialize background image
	191 + */
	192 +void
	193 +bginit()
	194 +{
	195 + XGCValues gcvalues;
	196 + Drawable bgimg;
	197 + XImage *bgxi = loadff(bgfile);
	198 +
	199 + memset(&gcvalues, 0, sizeof(gcvalues));
	200 + xw.bggc = XCreateGC(xw.dpy, xw.win, 0, &gcvalues);
	201 + if (!bgxi) return;
	202 + bgimg = XCreatePixmap(xw.dpy, xw.win, bgxi->width, bgxi->height,
	203 + DefaultDepth(xw.dpy, xw.scr));
	204 + XPutImage(xw.dpy, bgimg, dc.gc, bgxi, 0, 0, 0, 0, bgxi->width,
	205 + bgxi->height);
	206 + XDestroyImage(bgxi);
	207 + XSetTile(xw.dpy, xw.bggc, bgimg);
	208 + XSetFillStyle(xw.dpy, xw.bggc, FillTiled);
	209 + if (pseudotransparency) {
	210 + updatexy();
	211 + MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
	212 + XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &x…
	213 + }
	214 +}
	215 +
	216 int
	217 xmakeglyphfontspecs(XftGlyphFontSpec specs, const Glyph glyphs, int l…
	218 {
	219 @@ -1447,7 +1556,10 @@ xdrawglyphfontspecs(const XftGlyphFontSpec *specs…
	220 xclear(winx, winy + win.ch, winx + width, win.h);
	221
	222 /* Clean up the region we want to draw to. */
	223 - XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
	224 + if (bg == &dc.col[defaultbg])
	225 + xclear(winx, winy, winx + width, winy + win.ch);
	226 + else
	227 + XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
	228
	229 /* Set the clip region because Xft is sometimes dirty. */
	230 r.x = 0;
	231 @@ -1855,9 +1967,17 @@ cmessage(XEvent *e)
	232 void
	233 resize(XEvent *e)
	234 {
	235 - if (e->xconfigure.width == win.w && e->xconfigure.height == win…
	236 - return;
	237 -
	238 + if (pseudotransparency) {
	239 + if (e->xconfigure.width == win.w &&
	240 + e->xconfigure.height == win.h &&
	241 + e->xconfigure.x == win.x && e->xconfigure.y == win.…
	242 + return;
	243 + updatexy();
	244 + } else {
	245 + if (e->xconfigure.width == win.w &&
	246 + e->xconfigure.height == win.h)
	247 + return;
	248 + }
	249 cresize(e->xconfigure.width, e->xconfigure.height);
	250 }
	251
	252 @@ -2041,6 +2161,7 @@ run:
	253 rows = MAX(rows, 1);
	254 tnew(cols, rows);
	255 xinit(cols, rows);
	256 + bginit();
	257 xsetenv();
	258 selinit();
	259 run();
	260 --
	261 2.35.1
	262