t* A cli color picker
URI git clone git://git.codevoid.de/xpick.git
DIR Log
DIR Files
DIR Refs
DIR README
DIR LICENSE
---
DIR commit a2e06d1f05eb33bf8e8ebafe70da6321c2c374cc
DIR parent 7a9376b9529b913ed458d8e559d5a47551a5df3a
URI Author: c0dev0id <sh+github[at]codevoid[dot]de>
Date: Thu, 3 Dec 2020 20:45:51 +0100
Add -rhx options for rgb,hex,x11 notation
Diffstat:
M xpick.c | 77 ++++++++++++++++++++++++++++---
1 file changed, 71 insertions(+), 6 deletions(-)
---
DIR diff --git a/xpick.c b/xpick.c
t@@ -1,10 +1,57 @@
-#include <X11/Xlib.h>
+/* Copyright (c) 2020 Stefan Hagen <sh+ports[at]codevoid[dot]de>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
+
+#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/cursorfont.h>
#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+// original implementation in tmux colour.c
+static int rgb_to_x256(uint8_t r, uint8_t g, uint8_t b)
+{
+ // Calculate the nearest 0-based color index at 16 .. 231
+ #define v2ci(v) (v < 48 ? 0 : v < 115 ? 1 : (v - 35) / 40)
+ int ir = v2ci(r), ig = v2ci(g), ib = v2ci(b); // 0..5 each
+ #define color_index() (36 * ir + 6 * ig + ib) /* 0..215, lazy evaluation */
+
+ // Calculate the nearest 0-based gray index at 232 .. 255
+ int average = (r + g + b) / 3;
+ int gray_index = average > 238 ? 23 : (average - 3) / 10; // 0..23
+
+ // Calculate the represented colors back from the index
+ static const int i2cv[6] = {0, 0x5f, 0x87, 0xaf, 0xd7, 0xff};
+ int cr = i2cv[ir], cg = i2cv[ig], cb = i2cv[ib]; // r/g/b, 0..255 each
+ int gv = 8 + 10 * gray_index; // same value for r/g/b, 0..255
+ // Return the one which is nearer to the original input rgb value
+ #define dist_square(A,B,C, a,b,c) ((A-a)*(A-a) + (B-b)*(B-b) + (C-c)*(C-c))
+ int color_err = dist_square(cr, cg, cb, r, g, b);
+ int gray_err = dist_square(gv, gv, gv, r, g, b);
+ return color_err <= gray_err ? 16 + color_index() : 232 + gray_index;
+}
+
+int main(int argc, char *argv[]) {
-int main() {
+ if(argc <= 1) {
+ printf("Usage: xpick [-rhx]\n");
+ printf(" -r RGB notation RR/GG/BB\n");
+ printf(" -h HEX notation #RRGGBB\n");
+ printf(" -x XTerm nearest terminal color\n");
+ return 2;
+ }
Display *dpy = XOpenDisplay(NULL);
Window root = RootWindow(dpy, DefaultScreen(dpy));
t@@ -15,7 +62,7 @@ int main() {
bgc.red = -1; bgc.green = -1; bgc.blue = -1;
XRecolorCursor(dpy, cursor, &fgc, &bgc);
- XGrabPointer(dpy, root, 0, ButtonReleaseMask, GrabModeAsync, GrabModeAsync,
+ XGrabPointer(dpy, root, 0, ButtonReleaseMask, GrabModeAsync, GrabModeAsync,
None, cursor, CurrentTime);
XEvent event;
t@@ -26,10 +73,28 @@ int main() {
unsigned long p = XGetPixel(ximage, 0, 0);
XDestroyImage(ximage);
-
XColor result; result.pixel = p;
XQueryColor(dpy, DefaultColormap(dpy, DefaultScreen(dpy)), &result);
- printf("#%02x%02x%02x\n",
- result.red/256, result.green/256, result.blue/256);
+
+ int opt;
+ while((opt = getopt(argc, argv, ":hrx")) != -1){
+ switch(opt){
+ case 'h':
+ printf("#%02x%02x%02x\n",
+ result.red/256, result.green/256, result.blue/256);
+ break;
+ case 'r':
+ printf("%03d/%03d/%03d\n",
+ result.red/256, result.green/256, result.blue/256);
+ break;
+ case 'x':
+ printf("%d\n", rgb_to_x256(result.red/256, result.green/256,
+ result.blue/256));
+ break;
+ case '?': //used for some unknown opts
+ printf("Unknown option: %c\n", optopt);
+ break;
+ }
+ }
return 0;
}