commit 10728a2edc1ba16eed0d59b9901e65494ef1ec3a
parent 015e3cb7627262b8783d900fe746dddfa0050785
Author: sin <sin@2f30.org>
Date: Wed, 10 Jun 2015 14:38:55 +0100
Update hex2col.c
Diffstat:
| M | bin/hex2col.c | | | 113 | ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--------- |
1 file changed, 101 insertions(+), 12 deletions(-)
diff --git a/bin/hex2col.c b/bin/hex2col.c
@@ -1,22 +1,111 @@
-/* only works in xterm, written by z3bra */
-
#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
#include <string.h>
+#include <math.h>
+
+/*
+ * X.org 256 colors palette
+ * http://www.calmar.ws/vim/256-xterm-24bit-rgb-color-chart.html
+ */
+int xcolor[256][3] = {
+ { 0, 0, 0}, {128, 0, 0}, { 0,128, 0}, {128,128, 0}, { 0, 0,128}, {128, 0,128}, { 0,128,128}, {192,192,192},
+ {128,128,128}, {255, 0, 0}, { 0,255, 0}, {255,255, 0}, { 0, 0,255}, {255, 0,255}, { 0,255,255}, {255,255,255},
+ { 0, 0, 0}, { 0, 0, 95}, { 0, 0,135}, { 0, 0,175}, { 0, 0,215}, { 0, 0,255}, { 0, 95, 0}, { 0, 95, 95},
+ { 0, 95,135}, { 0, 95,175}, { 0, 95,215}, { 0, 95,255}, { 0,135, 0}, { 0,135, 95}, { 0,135,135}, { 0,135,175},
+ { 0,135,215}, { 0,135,255}, { 0,175, 0}, { 0,175, 95}, { 0,175,135}, { 0,175,175}, { 0,175,215}, { 0,175,255},
+ { 0,215, 0}, { 0,215, 95}, { 0,215,135}, { 0,215,175}, { 0,215,215}, { 0,215,255}, { 0,255, 0}, { 0,255, 95},
+ { 0,255,135}, { 0,255,175}, { 0,255,215}, { 0,255,255}, { 95, 0, 0}, { 95, 0, 95}, { 95, 0,135}, { 95, 0,175},
+ { 95, 0,215}, { 95, 0,255}, { 95, 95, 0}, { 95, 95, 95}, { 95, 95,135}, { 95, 95,175}, { 95, 95,215}, { 95, 95,255},
+ { 95,135, 0}, { 95,135, 95}, { 95,135,135}, { 95,135,175}, { 95,135,215}, { 95,135,255}, { 95,175, 0}, { 95,175, 95},
+ { 95,175,135}, { 95,175,175}, { 95,175,215}, { 95,175,255}, { 95,215, 0}, { 95,215, 95}, { 95,215,135}, { 95,215,175},
+ { 95,215,215}, { 95,215,255}, { 95,255, 0}, { 95,255, 95}, { 95,255,135}, { 95,255,175}, { 95,255,215}, { 95,255,255},
+ {135, 0, 0}, {135, 0, 95}, {135, 0,135}, {135, 0,175}, {135, 0,215}, {135, 0,255}, {135, 95, 0}, {135, 95, 95},
+ {135, 95,135}, {135, 95,175}, {135, 95,215}, {135, 95,255}, {135,135, 0}, {135,135, 95}, {135,135,135}, {135,135,175},
+ {135,135,215}, {135,135,255}, {135,175, 0}, {135,175, 95}, {135,175,135}, {135,175,175}, {135,175,215}, {135,175,255},
+ {135,215, 0}, {135,215, 95}, {135,215,135}, {135,215,175}, {135,215,215}, {135,215,255}, {135,255, 0}, {135,255, 95},
+ {135,255,135}, {135,255,175}, {135,255,215}, {135,255,255}, {175, 0, 0}, {175, 0, 95}, {175, 0,135}, {175, 0,175},
+ {175, 0,215}, {175, 0,255}, {175, 95, 0}, {175, 95, 95}, {175, 95,135}, {175, 95,175}, {175, 95,215}, {175, 95,255},
+ {175,135, 0}, {175,135, 95}, {175,135,135}, {175,135,175}, {175,135,215}, {175,135,255}, {175,175, 0}, {175,175, 95},
+ {175,175,135}, {175,175,175}, {175,175,215}, {175,175,255}, {175,215, 0}, {175,215, 95}, {175,215,135}, {175,215,175},
+ {175,215,215}, {175,215,255}, {175,255, 0}, {175,255, 95}, {175,255,135}, {175,255,175}, {175,255,215}, {175,255,255},
+ {215, 0, 0}, {215, 0, 95}, {215, 0,135}, {215, 0,175}, {215, 0,215}, {215, 0,255}, {215, 95, 0}, {215, 95, 95},
+ {215, 95,135}, {215, 95,175}, {215, 95,215}, {215, 95,255}, {215,135, 0}, {215,135, 95}, {215,135,135}, {215,135,175},
+ {215,135,215}, {215,135,255}, {215,175, 0}, {215,175, 95}, {215,175,135}, {215,175,175}, {215,175,215}, {215,175,255},
+ {215,215, 0}, {215,215, 95}, {215,215,135}, {215,215,175}, {215,215,215}, {215,215,255}, {215,255, 0}, {215,255, 95},
+ {215,255,135}, {215,255,175}, {215,255,215}, {215,255,255}, {255, 0, 0}, {255, 0, 95}, {255, 0,135}, {255, 0,175},
+ {255, 0,215}, {255, 0,255}, {255, 95, 0}, {255, 95, 95}, {255, 95,135}, {255, 95,175}, {255, 95,215}, {255, 95,255},
+ {255,135, 0}, {255,135, 95}, {255,135,135}, {255,135,175}, {255,135,215}, {255,135,255}, {255,175, 0}, {255,175, 95},
+ {255,175,135}, {255,175,175}, {255,175,215}, {255,175,255}, {255,215, 0}, {255,215, 95}, {255,215,135}, {255,215,175},
+ {255,215,215}, {255,215,255}, {255,255, 0}, {255,255, 95}, {255,255,135}, {255,255,175}, {255,255,215}, {255,255,255},
+ { 8, 8, 8}, { 18, 18, 18}, { 28, 28, 28}, { 38, 38, 38}, { 48, 48, 48}, { 58, 58, 58}, { 68, 68, 68}, { 78, 78, 78},
+ { 88, 88, 88}, { 96, 96, 96}, {102,102,102}, {118,118,118}, {128,128,128}, {138,138,138}, {148,148,148}, {158,158,158}
+};
+
+/*
+ * takes a 24 bits colors as an argument, and return the nearest color from our
+ * 256 X colors palette using the color quantization method.
+ * check https://en.wikipedia.org/wiki/Color_quantization for more infos
+ */
+int
+quantization(int rgb[3])
+{
+ int i, tmp, index;
+ int distance = 442;
+
+ for (i=0, tmp=0; i<256; i++) {
+ tmp = sqrt(pow(rgb[0] - xcolor[i][0],2) +
+ pow(rgb[1] - xcolor[i][1],2) +
+ pow(rgb[2] - xcolor[i][2],2));
+ if (tmp < distance) {
+ distance = tmp;
+ index = i;
+ }
+ }
+ return index;
+}
+
+/*
+ * converts an hexadecimal representation of a color into a 3 dimensionnal
+ * array (RGB decomposition)
+ */
+void
+hex2rgb(char *hex, int *rgb)
+{
+ int i;
+ char tmp[2];
+ for (i=0; i<3; i++) {
+ strncpy(tmp, hex + 1 + 2*i, 2);
+ rgb[i] = strtol(tmp, NULL, 16);
+ }
+}
int
main (int argc, char **argv)
{
- char hexcode[8], shortcode[2];
- int i, rgb[3];
-
- while (read(0, hexcode, 8) > 0) {
- hexcode[7] = 0;
- for (i=0; i<3; i++) {
- strncpy(shortcode, hexcode + 1 + 2*i, 2);
- rgb[i] = strtol(shortcode, NULL, 16);
+ char hex[8];
+ int rgb[3],
+ color = 0,
+ truemod = 0;
+
+ /* either use the "true-colors" ANSI escape (works only with X term) */
+ if (argc > 1 && strncmp(argv[1], "-t", 2) == 0)
+ truemod = 1;
+
+ while (fgets(hex, 8, stdin)) {
+ if (hex[0] == '#') {
+ hex2rgb(hex, rgb);
+ color = quantization(rgb);
+
+ if (truemod) {
+ printf("[48;2;%d;%d;%dm%8s[0m ", rgb[0],rgb[1],rgb[2], "");
+ printf("[38;2;%d;%d;%dm%s [0m", rgb[0],rgb[1],rgb[2], hex);
+ } else {
+ printf("[48;5;%dm%8s[0m ", color, "");
+ printf("[38;5;%dm%s[0m", color, hex);
+ }
+ printf("\n");
}
- printf("[48;2;%d;%d;%dm%8s[0m ", rgb[0],rgb[1],rgb[2], "");
- printf("[38;2;%d;%d;%dm%s[0m\n", rgb[0],rgb[1],rgb[2], hexcode);
}
printf("[0m");
