forked from Makuna/NeoPixelBus
Merge pull request #107 from unaiur/namedcolors
Convert HtmlColor to or from an String
This commit is contained in:
Michael Miller
GitHub
448
src/internal/HtmlColor.cpp
Normal file
448
src/internal/HtmlColor.cpp
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@@ -0,0 +1,448 @@
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/*-------------------------------------------------------------------------
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This file contains the HtmlColor implementation
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Written by Unai Uribarri
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I invest time and resources providing this open source code,
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please support me by dontating (see https://github.com/Makuna/NeoPixelBus)
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-------------------------------------------------------------------------
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This file is part of the Makuna/NeoPixelBus library.
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NeoPixelBus is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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NeoPixelBus is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with NeoPixel. If not, see
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<http://www.gnu.org/licenses/>.
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-------------------------------------------------------------------------*/
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#include "HtmlColor.h"
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/* HTML4 color names */
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static const char name_aqua[] PROGMEM = "aqua";
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static const char name_black[] PROGMEM = "black";
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static const char name_blue[] PROGMEM = "blue";
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static const char name_fuchsia[] PROGMEM = "fuchsia";
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static const char name_gray[] PROGMEM = "gray";
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static const char name_green[] PROGMEM = "green";
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static const char name_lime[] PROGMEM = "lime";
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static const char name_maroon[] PROGMEM = "maroon";
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static const char name_navy[] PROGMEM = "navy";
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static const char name_olive[] PROGMEM = "olive";
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static const char name_orange[] PROGMEM = "orange";
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static const char name_purple[] PROGMEM = "purple";
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static const char name_red[] PROGMEM = "red";
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static const char name_silver[] PROGMEM = "silver";
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static const char name_teal[] PROGMEM = "teal";
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static const char name_white[] PROGMEM = "white";
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static const char name_yellow[] PROGMEM = "yellow";
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#if defined(USE_CSS3_COLORS)
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/* Additional CSS3 color names */
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static const char name_aliceblue[] PROGMEM = "aliceblue";
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static const char name_antiquewhite[] PROGMEM = "antiquewhite";
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static const char name_aquamarine[] PROGMEM = "aquamarine";
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static const char name_azure[] PROGMEM = "azure";
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static const char name_beige[] PROGMEM = "beige";
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static const char name_bisque[] PROGMEM = "bisque";
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static const char name_blanchedalmond[] PROGMEM = "blanchedalmond";
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static const char name_blueviolet[] PROGMEM = "blueviolet";
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static const char name_brown[] PROGMEM = "brown";
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static const char name_burlywood[] PROGMEM = "burlywood";
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static const char name_cadetblue[] PROGMEM = "cadetblue";
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static const char name_chartreuse[] PROGMEM = "chartreuse";
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static const char name_chocolate[] PROGMEM = "chocolate";
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static const char name_coral[] PROGMEM = "coral";
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static const char name_cornflowerblue[] PROGMEM = "cornflowerblue";
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static const char name_cornsilk[] PROGMEM = "cornsilk";
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static const char name_crimson[] PROGMEM = "crimson";
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static const char name_cyan[] PROGMEM = "cyan";
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static const char name_darkblue[] PROGMEM = "darkblue";
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static const char name_darkcyan[] PROGMEM = "darkcyan";
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static const char name_darkgoldenrod[] PROGMEM = "darkgoldenrod";
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static const char name_darkgray[] PROGMEM = "darkgray";
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static const char name_darkgreen[] PROGMEM = "darkgreen";
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static const char name_darkgrey[] PROGMEM = "darkgrey";
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static const char name_darkkhaki[] PROGMEM = "darkkhaki";
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static const char name_darkmagenta[] PROGMEM = "darkmagenta";
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static const char name_darkolivegreen[] PROGMEM = "darkolivegreen";
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static const char name_darkorange[] PROGMEM = "darkorange";
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static const char name_darkorchid[] PROGMEM = "darkorchid";
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static const char name_darkred[] PROGMEM = "darkred";
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static const char name_darksalmon[] PROGMEM = "darksalmon";
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static const char name_darkseagreen[] PROGMEM = "darkseagreen";
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static const char name_darkslateblue[] PROGMEM = "darkslateblue";
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static const char name_darkslategray[] PROGMEM = "darkslategray";
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static const char name_darkslategrey[] PROGMEM = "darkslategrey";
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static const char name_darkturquoise[] PROGMEM = "darkturquoise";
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static const char name_darkviolet[] PROGMEM = "darkviolet";
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static const char name_deeppink[] PROGMEM = "deeppink";
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static const char name_deepskyblue[] PROGMEM = "deepskyblue";
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static const char name_dimgray[] PROGMEM = "dimgray";
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static const char name_dimgrey[] PROGMEM = "dimgrey";
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static const char name_dodgerblue[] PROGMEM = "dodgerblue";
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static const char name_firebrick[] PROGMEM = "firebrick";
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static const char name_floralwhite[] PROGMEM = "floralwhite";
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static const char name_forestgreen[] PROGMEM = "forestgreen";
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static const char name_gainsboro[] PROGMEM = "gainsboro";
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static const char name_ghostwhite[] PROGMEM = "ghostwhite";
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static const char name_gold[] PROGMEM = "gold";
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static const char name_goldenrod[] PROGMEM = "goldenrod";
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static const char name_greenyellow[] PROGMEM = "greenyellow";
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static const char name_grey[] PROGMEM = "grey";
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static const char name_honeydew[] PROGMEM = "honeydew";
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static const char name_hotpink[] PROGMEM = "hotpink";
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static const char name_indianred[] PROGMEM = "indianred";
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static const char name_indigo[] PROGMEM = "indigo";
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static const char name_ivory[] PROGMEM = "ivory";
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static const char name_khaki[] PROGMEM = "khaki";
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static const char name_lavender[] PROGMEM = "lavender";
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static const char name_lavenderblush[] PROGMEM = "lavenderblush";
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static const char name_lawngreen[] PROGMEM = "lawngreen";
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static const char name_lemonchiffon[] PROGMEM = "lemonchiffon";
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static const char name_lightblue[] PROGMEM = "lightblue";
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static const char name_lightcoral[] PROGMEM = "lightcoral";
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static const char name_lightcyan[] PROGMEM = "lightcyan";
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static const char name_lightgoldenrodyellow[] PROGMEM = "lightgoldenrodyellow";
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static const char name_lightgray[] PROGMEM = "lightgray";
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static const char name_lightgreen[] PROGMEM = "lightgreen";
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static const char name_lightgrey[] PROGMEM = "lightgrey";
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static const char name_lightpink[] PROGMEM = "lightpink";
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static const char name_lightsalmon[] PROGMEM = "lightsalmon";
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static const char name_lightseagreen[] PROGMEM = "lightseagreen";
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static const char name_lightskyblue[] PROGMEM = "lightskyblue";
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static const char name_lightslategray[] PROGMEM = "lightslategray";
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static const char name_lightslategrey[] PROGMEM = "lightslategrey";
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static const char name_lightsteelblue[] PROGMEM = "lightsteelblue";
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static const char name_lightyellow[] PROGMEM = "lightyellow";
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static const char name_limegreen[] PROGMEM = "limegreen";
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static const char name_linen[] PROGMEM = "linen";
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static const char name_magenta[] PROGMEM = "magenta";
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static const char name_mediumaquamarine[] PROGMEM = "mediumaquamarine";
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static const char name_mediumblue[] PROGMEM = "mediumblue";
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static const char name_mediumorchid[] PROGMEM = "mediumorchid";
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static const char name_mediumpurple[] PROGMEM = "mediumpurple";
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static const char name_mediumseagreen[] PROGMEM = "mediumseagreen";
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static const char name_mediumslateblue[] PROGMEM = "mediumslateblue";
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static const char name_mediumspringgreen[] PROGMEM = "mediumspringgreen";
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static const char name_mediumturquoise[] PROGMEM = "mediumturquoise";
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static const char name_mediumvioletred[] PROGMEM = "mediumvioletred";
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static const char name_midnightblue[] PROGMEM = "midnightblue";
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static const char name_mintcream[] PROGMEM = "mintcream";
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static const char name_mistyrose[] PROGMEM = "mistyrose";
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static const char name_moccasin[] PROGMEM = "moccasin";
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static const char name_navajowhite[] PROGMEM = "navajowhite";
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static const char name_oldlace[] PROGMEM = "oldlace";
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static const char name_olivedrab[] PROGMEM = "olivedrab";
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static const char name_orangered[] PROGMEM = "orangered";
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static const char name_orchid[] PROGMEM = "orchid";
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static const char name_palegoldenrod[] PROGMEM = "palegoldenrod";
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static const char name_palegreen[] PROGMEM = "palegreen";
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static const char name_paleturquoise[] PROGMEM = "paleturquoise";
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static const char name_palevioletred[] PROGMEM = "palevioletred";
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static const char name_papayawhip[] PROGMEM = "papayawhip";
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static const char name_peachpuff[] PROGMEM = "peachpuff";
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static const char name_peru[] PROGMEM = "peru";
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static const char name_pink[] PROGMEM = "pink";
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static const char name_plum[] PROGMEM = "plum";
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static const char name_powderblue[] PROGMEM = "powderblue";
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static const char name_rosybrown[] PROGMEM = "rosybrown";
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static const char name_royalblue[] PROGMEM = "royalblue";
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static const char name_saddlebrown[] PROGMEM = "saddlebrown";
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static const char name_salmon[] PROGMEM = "salmon";
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static const char name_sandybrown[] PROGMEM = "sandybrown";
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static const char name_seagreen[] PROGMEM = "seagreen";
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static const char name_seashell[] PROGMEM = "seashell";
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static const char name_sienna[] PROGMEM = "sienna";
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static const char name_skyblue[] PROGMEM = "skyblue";
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static const char name_slateblue[] PROGMEM = "slateblue";
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static const char name_slategray[] PROGMEM = "slategray";
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static const char name_slategrey[] PROGMEM = "slategrey";
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static const char name_snow[] PROGMEM = "snow";
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static const char name_springgreen[] PROGMEM = "springgreen";
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static const char name_steelblue[] PROGMEM = "steelblue";
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static const char name_tan[] PROGMEM = "tan";
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static const char name_thistle[] PROGMEM = "thistle";
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static const char name_tomato[] PROGMEM = "tomato";
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static const char name_turquoise[] PROGMEM = "turquoise";
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static const char name_violet[] PROGMEM = "violet";
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static const char name_wheat[] PROGMEM = "wheat";
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static const char name_whitesmoke[] PROGMEM = "whitesmoke";
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static const char name_yellowgreen[] PROGMEM = "yellowgreen";
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#endif
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const HtmlColorName HtmlColor::ColorNames[] PROGMEM = {
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#if defined(USE_CSS3_COLORS)
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{ name_aliceblue, 0xf0f8ff},
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{ name_antiquewhite, 0xfaebd7},
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{ name_aqua, 0xffff},
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{ name_aquamarine, 0x7fffd4},
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{ name_azure, 0xf0ffff},
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{ name_beige, 0xf5f5dc},
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{ name_bisque, 0xffe4c4},
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{ name_black, 0x0},
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{ name_blanchedalmond, 0xffebcd},
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{ name_blue, 0xff},
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{ name_blueviolet, 0x8a2be2},
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{ name_brown, 0xa52a2a},
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{ name_burlywood, 0xdeb887},
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{ name_cadetblue, 0x5f9ea0},
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{ name_chartreuse, 0x7fff00},
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{ name_chocolate, 0xd2691e},
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{ name_coral, 0xff7f50},
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{ name_cornflowerblue, 0x6495ed},
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{ name_cornsilk, 0xfff8dc},
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{ name_crimson, 0xdc143c},
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{ name_cyan, 0xffff},
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{ name_darkblue, 0x8b},
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{ name_darkcyan, 0x8b8b},
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{ name_darkgoldenrod, 0xb8860b},
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{ name_darkgray, 0xa9a9a9},
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{ name_darkgreen, 0x6400},
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{ name_darkgrey, 0xa9a9a9},
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{ name_darkkhaki, 0xbdb76b},
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{ name_darkmagenta, 0x8b008b},
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{ name_darkolivegreen, 0x556b2f},
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{ name_darkorange, 0xff8c00},
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{ name_darkorchid, 0x9932cc},
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{ name_darkred, 0x8b0000},
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{ name_darksalmon, 0xe9967a},
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{ name_darkseagreen, 0x8fbc8f},
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{ name_darkslateblue, 0x483d8b},
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{ name_darkslategray, 0x2f4f4f},
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{ name_darkslategrey, 0x2f4f4f},
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{ name_darkturquoise, 0xced1},
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{ name_darkviolet, 0x9400d3},
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{ name_deeppink, 0xff1493},
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{ name_deepskyblue, 0xbfff},
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{ name_dimgray, 0x696969},
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{ name_dimgrey, 0x696969},
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{ name_dodgerblue, 0x1e90ff},
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{ name_firebrick, 0xb22222},
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{ name_floralwhite, 0xfffaf0},
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{ name_forestgreen, 0x228b22},
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{ name_fuchsia, 0xff00ff},
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{ name_gainsboro, 0xdcdcdc},
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{ name_ghostwhite, 0xf8f8ff},
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{ name_gold, 0xffd700},
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{ name_goldenrod, 0xdaa520},
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{ name_gray, 0x808080},
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{ name_green, 0x8000},
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{ name_greenyellow, 0xadff2f},
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{ name_grey, 0x808080},
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{ name_honeydew, 0xf0fff0},
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{ name_hotpink, 0xff69b4},
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{ name_indianred, 0xcd5c5c},
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{ name_indigo, 0x4b0082},
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{ name_ivory, 0xfffff0},
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{ name_khaki, 0xf0e68c},
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{ name_lavender, 0xe6e6fa},
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{ name_lavenderblush, 0xfff0f5},
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{ name_lawngreen, 0x7cfc00},
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{ name_lemonchiffon, 0xfffacd},
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{ name_lightblue, 0xadd8e6},
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{ name_lightcoral, 0xf08080},
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{ name_lightcyan, 0xe0ffff},
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{ name_lightgoldenrodyellow, 0xfafad2},
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{ name_lightgray, 0xd3d3d3},
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{ name_lightgreen, 0x90ee90},
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{ name_lightgrey, 0xd3d3d3},
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{ name_lightpink, 0xffb6c1},
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{ name_lightsalmon, 0xffa07a},
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{ name_lightseagreen, 0x20b2aa},
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{ name_lightskyblue, 0x87cefa},
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{ name_lightslategray, 0x778899},
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{ name_lightslategrey, 0x778899},
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{ name_lightsteelblue, 0xb0c4de},
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{ name_lightyellow, 0xffffe0},
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{ name_lime, 0xff00},
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{ name_limegreen, 0x32cd32},
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{ name_linen, 0xfaf0e6},
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{ name_magenta, 0xff00ff},
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{ name_maroon, 0x800000},
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{ name_mediumaquamarine, 0x66cdaa},
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{ name_mediumblue, 0xcd},
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{ name_mediumorchid, 0xba55d3},
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{ name_mediumpurple, 0x9370d8},
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{ name_mediumseagreen, 0x3cb371},
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{ name_mediumslateblue, 0x7b68ee},
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{ name_mediumspringgreen, 0xfa9a},
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{ name_mediumturquoise, 0x48d1cc},
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{ name_mediumvioletred, 0xc71585},
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{ name_midnightblue, 0x191970},
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{ name_mintcream, 0xf5fffa},
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{ name_mistyrose, 0xffe4e1},
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{ name_moccasin, 0xffe4b5},
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{ name_navajowhite, 0xffdead},
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{ name_navy, 0x80},
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{ name_oldlace, 0xfdf5e6},
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{ name_olive, 0x808000},
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{ name_olivedrab, 0x6b8e23},
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{ name_orange, 0xffa500},
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{ name_orangered, 0xff4500},
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{ name_orchid, 0xda70d6},
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{ name_palegoldenrod, 0xeee8aa},
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{ name_palegreen, 0x98fb98},
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{ name_paleturquoise, 0xafeeee},
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{ name_palevioletred, 0xd87093},
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{ name_papayawhip, 0xffefd5},
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{ name_peachpuff, 0xffdab9},
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{ name_peru, 0xcd853f},
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{ name_pink, 0xffc0cb},
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{ name_plum, 0xdda0dd},
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{ name_powderblue, 0xb0e0e6},
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{ name_purple, 0x800080},
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{ name_red, 0xff0000},
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{ name_rosybrown, 0xbc8f8f},
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{ name_royalblue, 0x4169e1},
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{ name_saddlebrown, 0x8b4513},
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{ name_salmon, 0xfa8072},
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{ name_sandybrown, 0xf4a460},
|
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{ name_seagreen, 0x2e8b57},
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{ name_seashell, 0xfff5ee},
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{ name_sienna, 0xa0522d},
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{ name_silver, 0xc0c0c0},
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{ name_skyblue, 0x87ceeb},
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{ name_slateblue, 0x6a5acd},
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{ name_slategray, 0x708090},
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{ name_slategrey, 0x708090},
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{ name_snow, 0xfffafa},
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{ name_springgreen, 0xff7f},
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{ name_steelblue, 0x4682b4},
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{ name_tan, 0xd2b48c},
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{ name_teal, 0x8080},
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{ name_thistle, 0xd8bfd8},
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{ name_tomato, 0xff6347},
|
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{ name_turquoise, 0x40e0d0},
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{ name_violet, 0xee82ee},
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{ name_wheat, 0xf5deb3},
|
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{ name_white, 0xffffff},
|
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{ name_whitesmoke, 0xf5f5f5},
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{ name_yellow, 0xffff00},
|
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{ name_yellowgreen, 0x9acd32},
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#else
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{ name_aqua, 0xffff},
|
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{ name_black, 0x0},
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{ name_blue, 0xff},
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{ name_fuchsia, 0xff00ff},
|
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{ name_gray, 0x808080},
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{ name_green, 0x8000},
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{ name_lime, 0xff00},
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{ name_maroon, 0x800000},
|
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{ name_navy, 0x80},
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{ name_olive, 0x808000},
|
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{ name_orange, 0xffa500},
|
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{ name_purple, 0x800080},
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{ name_red, 0xff0000},
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{ name_silver, 0xc0c0c0},
|
||||
{ name_teal, 0x8080},
|
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{ name_white, 0xffffff},
|
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{ name_yellow, 0xffff00},
|
||||
#endif
|
||||
};
|
||||
|
||||
bool HtmlColor::Parse(const char* name, size_t namelen)
|
||||
{
|
||||
if (name[0] == '#')
|
||||
{
|
||||
// Parse an hexadecimal notation "#rrbbgg" or "#rgb"
|
||||
if (namelen != 4 && namelen != 7)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
uint32_t color = 0;
|
||||
for (uint8_t i = 1; i < namelen; ++i)
|
||||
{
|
||||
char c = name[i];
|
||||
if (c >= '0' && c <= '9')
|
||||
{
|
||||
c -= '0';
|
||||
}
|
||||
else
|
||||
{
|
||||
// Convert a letter to lower case (only for ASCII letters)
|
||||
// It's faster & smaller than tolower()
|
||||
c |= 32;
|
||||
if (c >= 'a' && c <= 'f')
|
||||
{
|
||||
c = c - 'a' + 10;
|
||||
}
|
||||
else
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
color = color * 16 + c;
|
||||
if (namelen == 4)
|
||||
{
|
||||
// 3 digit hexadecimal notation can be supported easily
|
||||
// duplicating digits.
|
||||
color = color * 16 + c;
|
||||
}
|
||||
}
|
||||
Color = color;
|
||||
return true;
|
||||
}
|
||||
|
||||
for (uint8_t i = 0; i < sizeof(ColorNames)/sizeof(ColorNames[0]); ++i)
|
||||
{
|
||||
const HtmlColorName* cn = &ColorNames[i];
|
||||
if (strncasecmp_P(name, cn->Name, namelen) == 0 && strlen_P(cn->Name) == namelen)
|
||||
{
|
||||
Color = cn->Color;
|
||||
return true;
|
||||
}
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
static inline char hexdigit(uint8_t v)
|
||||
{
|
||||
return v + (v < 10 ? '0' : 'a' - 10);
|
||||
}
|
||||
|
||||
size_t HtmlColor::ToString(char* buf, size_t buflen) const
|
||||
{
|
||||
for (uint8_t i = 0; i < sizeof(ColorNames) / sizeof(ColorNames[0]); ++i)
|
||||
{
|
||||
const HtmlColorName* cn = &ColorNames[i];
|
||||
if (cn->Color == Color)
|
||||
{
|
||||
size_t namelen = strlen_P(cn->Name);
|
||||
if (buflen-- > 0)
|
||||
{
|
||||
buflen = min(buflen, namelen);
|
||||
memcpy_P(buf, cn->Name, buflen);
|
||||
buf[buflen] = 0;
|
||||
}
|
||||
return namelen;
|
||||
}
|
||||
}
|
||||
|
||||
if (buflen-- > 0)
|
||||
{
|
||||
if (buflen > 0)
|
||||
{
|
||||
buf[0] = '#';
|
||||
}
|
||||
uint32_t color = Color;
|
||||
for (uint8_t i = 6; i > 0; i--)
|
||||
{
|
||||
if (buflen > i)
|
||||
{
|
||||
buf[i] = hexdigit(color & 0x0000000f);
|
||||
}
|
||||
color >>= 4;
|
||||
}
|
||||
buf[min(buflen, 7)] = 0;
|
||||
}
|
||||
return 7;
|
||||
}
|
||||
@@ -28,6 +28,20 @@ License along with NeoPixel. If not, see
|
||||
#include <Arduino.h>
|
||||
#include "RgbColor.h"
|
||||
|
||||
#if defined(USE_CSS3_COLORS)
|
||||
#define MAX_HTML_COLOR_NAME_LEN 21
|
||||
#else
|
||||
#define MAX_HTML_COLOR_NAME_LEN 8
|
||||
#endif
|
||||
|
||||
// ------------------------------------------------------------------------
|
||||
// HtmlColor represents an association between a name and a HTML color code
|
||||
// ------------------------------------------------------------------------
|
||||
struct HtmlColorName
|
||||
{
|
||||
PGM_P Name;
|
||||
uint32_t Color;
|
||||
};
|
||||
|
||||
// ------------------------------------------------------------------------
|
||||
// HtmlColor represents a color object that is represented by a single uint32
|
||||
@@ -75,6 +89,42 @@ struct HtmlColor
|
||||
return !(*this == other);
|
||||
};
|
||||
|
||||
// ------------------------------------------------------------------------
|
||||
// Parse a HTML4/CSS3 color name
|
||||
//
|
||||
// name - the color name
|
||||
// namelen - length of the name string
|
||||
//
|
||||
// It accepts all standard HTML4 names and, if USE_CSS3_COLORS macro is
|
||||
// defined, the extended color names defined in CSS3 standard also.
|
||||
//
|
||||
// It also accepts 3 or 6 digit hexadecimal notation (#rgb or #rrggbb),
|
||||
// but it doesn't accept RGB, RGBA nor HSL values.
|
||||
//
|
||||
// See https://www.w3.org/TR/css3-color/#SRGB
|
||||
//
|
||||
// Name MUST be stripped of any leading or tailing whitespace.
|
||||
//
|
||||
// Name MUST NOT be a PROGMEM pointer
|
||||
// ------------------------------------------------------------------------
|
||||
bool Parse(const char* name, size_t namelen);
|
||||
bool Parse(const char* name) { return Parse(name, strlen(name)); }
|
||||
bool Parse(String const &name) { return Parse(name.c_str(), name.length()); }
|
||||
|
||||
// ------------------------------------------------------------------------
|
||||
// Converts this color code to its HTML4/CSS3 name
|
||||
//
|
||||
// buf - array of at least MAX_HTML_COLOR_NAME_LEN chars to store the name
|
||||
// len - actual length of buf array
|
||||
//
|
||||
// It returns the space needed to write the color name not including the
|
||||
// final NUL char.
|
||||
//
|
||||
// If there is not enough space in the buffer, it will write as many
|
||||
// characters as allowed and will always finish the buffer with a NUL char
|
||||
// ------------------------------------------------------------------------
|
||||
size_t ToString(char *buf, size_t len) const;
|
||||
|
||||
// ------------------------------------------------------------------------
|
||||
// BilinearBlend between four colors by the amount defined by 2d variable
|
||||
// c00 - upper left quadrant color
|
||||
@@ -101,5 +151,12 @@ struct HtmlColor
|
||||
// 0x0000ff is blue
|
||||
// ------------------------------------------------------------------------
|
||||
uint32_t Color;
|
||||
|
||||
private:
|
||||
// ------------------------------------------------------------------------
|
||||
// Array with all color names and its corresponding color codes
|
||||
// The array ends with a NULL color name.
|
||||
// ------------------------------------------------------------------------
|
||||
static const HtmlColorName ColorNames[] PROGMEM;
|
||||
};
|
||||
|
||||
|
||||
Reference in New Issue
Block a user