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annotate bin/256colors2.pl @ 712:c1ad9cc00624

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author nanaya <me@nanaya.net>
date Thu, 19 Oct 2023 05:51:50 +0900
parents 5bafb912837e
children
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1 #!/usr/bin/perl
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2 # Author: Todd Larason <jtl@molehill.org>
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3 # $XFree86: xc/programs/xterm/vttests/256colors2.pl,v 1.2 2002/03/26 01:46:43 dickey Exp $
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4
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5 # use the resources for colors 0-15 - usually more-or-less a
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6 # reproduction of the standard ANSI colors, but possibly more
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7 # pleasing shades
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8
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9 # colors 16-231 are a 6x6x6 color cube
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10 for ($red = 0; $red < 6; $red++) {
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11 for ($green = 0; $green < 6; $green++) {
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12 for ($blue = 0; $blue < 6; $blue++) {
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13 printf("\x1b]4;%d;rgb:%2.2x/%2.2x/%2.2x\x1b\\",
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14 16 + ($red * 36) + ($green * 6) + $blue,
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15 ($red ? ($red * 40 + 55) : 0),
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16 ($green ? ($green * 40 + 55) : 0),
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17 ($blue ? ($blue * 40 + 55) : 0));
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18 }
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19 }
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20 }
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21
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22 # colors 232-255 are a grayscale ramp, intentionally leaving out
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23 # black and white
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24 for ($gray = 0; $gray < 24; $gray++) {
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25 $level = ($gray * 10) + 8;
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26 printf("\x1b]4;%d;rgb:%2.2x/%2.2x/%2.2x\x1b\\",
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27 232 + $gray, $level, $level, $level);
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28 }
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29
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30
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31 # display the colors
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32
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33 # first the system ones:
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34 print "System colors:\n";
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35 for ($color = 0; $color < 8; $color++) {
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36 print "\x1b[48;5;${color}m ";
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37 }
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38 print "\x1b[0m\n";
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39 for ($color = 8; $color < 16; $color++) {
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40 print "\x1b[48;5;${color}m ";
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41 }
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42 print "\x1b[0m\n\n";
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43
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44 # now the color cube
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45 print "Color cube, 6x6x6:\n";
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46 for ($green = 0; $green < 6; $green++) {
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47 for ($red = 0; $red < 6; $red++) {
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48 for ($blue = 0; $blue < 6; $blue++) {
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49 $color = 16 + ($red * 36) + ($green * 6) + $blue;
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50 print "\x1b[48;5;${color}m ";
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51 }
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52 print "\x1b[0m ";
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53 }
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54 print "\n";
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55 }
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56
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57
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58 # now the grayscale ramp
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59 print "Grayscale ramp:\n";
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60 for ($color = 232; $color < 256; $color++) {
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61 print "\x1b[48;5;${color}m ";
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62 }
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63 print "\x1b[0m\n";