diff --git a/src/internal/HtmlColor.cpp b/src/internal/HtmlColor.cpp new file mode 100644 index 0000000..b744abd --- /dev/null +++ b/src/internal/HtmlColor.cpp @@ -0,0 +1,448 @@ +/*------------------------------------------------------------------------- +This file contains the HtmlColor implementation + +Written by Unai Uribarri + +I invest time and resources providing this open source code, +please support me by dontating (see https://github.com/Makuna/NeoPixelBus) + +------------------------------------------------------------------------- +This file is part of the Makuna/NeoPixelBus library. + +NeoPixelBus is free software: you can redistribute it and/or modify +it under the terms of the GNU Lesser General Public License as +published by the Free Software Foundation, either version 3 of +the License, or (at your option) any later version. + +NeoPixelBus is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU Lesser General Public License for more details. + +You should have received a copy of the GNU Lesser General Public +License along with NeoPixel. If not, see +. +-------------------------------------------------------------------------*/ +#include "HtmlColor.h" + +/* HTML4 color names */ +static const char name_aqua[] PROGMEM = "aqua"; +static const char name_black[] PROGMEM = "black"; +static const char name_blue[] PROGMEM = "blue"; +static const char name_fuchsia[] PROGMEM = "fuchsia"; +static const char name_gray[] PROGMEM = "gray"; +static const char name_green[] PROGMEM = "green"; +static const char name_lime[] PROGMEM = "lime"; +static const char name_maroon[] PROGMEM = "maroon"; +static const char name_navy[] PROGMEM = "navy"; +static const char name_olive[] PROGMEM = "olive"; +static const char name_orange[] PROGMEM = "orange"; +static const char name_purple[] PROGMEM = "purple"; +static const char name_red[] PROGMEM = "red"; +static const char name_silver[] PROGMEM = "silver"; +static const char name_teal[] PROGMEM = "teal"; +static const char name_white[] PROGMEM = "white"; +static const char name_yellow[] PROGMEM = "yellow"; + +#if defined(USE_CSS3_COLORS) +/* Additional CSS3 color names */ +static const char name_aliceblue[] PROGMEM = "aliceblue"; +static const char name_antiquewhite[] PROGMEM = "antiquewhite"; +static const char name_aquamarine[] PROGMEM = "aquamarine"; +static const char name_azure[] PROGMEM = "azure"; +static const char name_beige[] PROGMEM = "beige"; +static const char name_bisque[] PROGMEM = "bisque"; +static const char name_blanchedalmond[] PROGMEM = "blanchedalmond"; +static const char name_blueviolet[] PROGMEM = "blueviolet"; +static const char name_brown[] PROGMEM = "brown"; +static const char name_burlywood[] PROGMEM = "burlywood"; +static const char name_cadetblue[] PROGMEM = "cadetblue"; +static const char name_chartreuse[] PROGMEM = "chartreuse"; +static const char name_chocolate[] PROGMEM = "chocolate"; +static const char name_coral[] PROGMEM = "coral"; +static const char name_cornflowerblue[] PROGMEM = "cornflowerblue"; +static const char name_cornsilk[] PROGMEM = "cornsilk"; +static const char name_crimson[] PROGMEM = "crimson"; +static const char name_cyan[] PROGMEM = "cyan"; +static const char name_darkblue[] PROGMEM = "darkblue"; +static const char name_darkcyan[] PROGMEM = "darkcyan"; +static const char name_darkgoldenrod[] PROGMEM = "darkgoldenrod"; +static const char name_darkgray[] PROGMEM = "darkgray"; +static const char name_darkgreen[] PROGMEM = "darkgreen"; +static const char name_darkgrey[] PROGMEM = "darkgrey"; +static const char name_darkkhaki[] PROGMEM = "darkkhaki"; +static const char name_darkmagenta[] PROGMEM = "darkmagenta"; +static const char name_darkolivegreen[] PROGMEM = "darkolivegreen"; +static const char name_darkorange[] PROGMEM = "darkorange"; +static const char name_darkorchid[] PROGMEM = "darkorchid"; +static const char name_darkred[] PROGMEM = "darkred"; +static const char name_darksalmon[] PROGMEM = "darksalmon"; +static const char name_darkseagreen[] PROGMEM = "darkseagreen"; +static const char name_darkslateblue[] PROGMEM = "darkslateblue"; +static const char name_darkslategray[] PROGMEM = "darkslategray"; +static const char name_darkslategrey[] PROGMEM = "darkslategrey"; +static const char name_darkturquoise[] PROGMEM = "darkturquoise"; +static const char name_darkviolet[] PROGMEM = "darkviolet"; +static const char name_deeppink[] PROGMEM = "deeppink"; +static const char name_deepskyblue[] PROGMEM = "deepskyblue"; +static const char name_dimgray[] PROGMEM = "dimgray"; +static const char name_dimgrey[] PROGMEM = "dimgrey"; +static const char name_dodgerblue[] PROGMEM = "dodgerblue"; +static const char name_firebrick[] PROGMEM = "firebrick"; +static const char name_floralwhite[] PROGMEM = "floralwhite"; +static const char name_forestgreen[] PROGMEM = "forestgreen"; +static const char name_gainsboro[] PROGMEM = "gainsboro"; +static const char name_ghostwhite[] PROGMEM = "ghostwhite"; +static const char name_gold[] PROGMEM = "gold"; +static const char name_goldenrod[] PROGMEM = "goldenrod"; +static const char name_greenyellow[] PROGMEM = "greenyellow"; +static const char name_grey[] PROGMEM = "grey"; +static const char name_honeydew[] PROGMEM = "honeydew"; +static const char name_hotpink[] PROGMEM = "hotpink"; +static const char name_indianred[] PROGMEM = "indianred"; +static const char name_indigo[] PROGMEM = "indigo"; +static const char name_ivory[] PROGMEM = "ivory"; +static const char name_khaki[] PROGMEM = "khaki"; +static const char name_lavender[] PROGMEM = "lavender"; +static const char name_lavenderblush[] PROGMEM = "lavenderblush"; +static const char name_lawngreen[] PROGMEM = "lawngreen"; +static const char name_lemonchiffon[] PROGMEM = "lemonchiffon"; +static const char name_lightblue[] PROGMEM = "lightblue"; +static const char name_lightcoral[] PROGMEM = "lightcoral"; +static const char name_lightcyan[] PROGMEM = "lightcyan"; +static const char name_lightgoldenrodyellow[] PROGMEM = "lightgoldenrodyellow"; +static const char name_lightgray[] PROGMEM = "lightgray"; +static const char name_lightgreen[] PROGMEM = "lightgreen"; +static const char name_lightgrey[] PROGMEM = "lightgrey"; +static const char name_lightpink[] PROGMEM = "lightpink"; +static const char name_lightsalmon[] PROGMEM = "lightsalmon"; +static const char name_lightseagreen[] PROGMEM = "lightseagreen"; +static const char name_lightskyblue[] PROGMEM = "lightskyblue"; +static const char name_lightslategray[] PROGMEM = "lightslategray"; +static const char name_lightslategrey[] PROGMEM = "lightslategrey"; +static const char name_lightsteelblue[] PROGMEM = "lightsteelblue"; +static const char name_lightyellow[] PROGMEM = "lightyellow"; +static const char name_limegreen[] PROGMEM = "limegreen"; +static const char name_linen[] PROGMEM = "linen"; +static const char name_magenta[] PROGMEM = "magenta"; +static const char name_mediumaquamarine[] PROGMEM = "mediumaquamarine"; +static const char name_mediumblue[] PROGMEM = "mediumblue"; +static const char name_mediumorchid[] PROGMEM = "mediumorchid"; +static const char name_mediumpurple[] PROGMEM = "mediumpurple"; +static const char name_mediumseagreen[] PROGMEM = "mediumseagreen"; +static const char name_mediumslateblue[] PROGMEM = "mediumslateblue"; +static const char name_mediumspringgreen[] PROGMEM = "mediumspringgreen"; +static const char name_mediumturquoise[] PROGMEM = "mediumturquoise"; +static const char name_mediumvioletred[] PROGMEM = "mediumvioletred"; +static const char name_midnightblue[] PROGMEM = "midnightblue"; +static const char name_mintcream[] PROGMEM = "mintcream"; +static const char name_mistyrose[] PROGMEM = "mistyrose"; +static const char name_moccasin[] PROGMEM = "moccasin"; +static const char name_navajowhite[] PROGMEM = "navajowhite"; +static const char name_oldlace[] PROGMEM = "oldlace"; +static const char name_olivedrab[] PROGMEM = "olivedrab"; +static const char name_orangered[] PROGMEM = "orangered"; +static const char name_orchid[] PROGMEM = "orchid"; +static const char name_palegoldenrod[] PROGMEM = "palegoldenrod"; +static const char name_palegreen[] PROGMEM = "palegreen"; +static const char name_paleturquoise[] PROGMEM = "paleturquoise"; +static const char name_palevioletred[] PROGMEM = "palevioletred"; +static const char name_papayawhip[] PROGMEM = "papayawhip"; +static const char name_peachpuff[] PROGMEM = "peachpuff"; +static const char name_peru[] PROGMEM = "peru"; +static const char name_pink[] PROGMEM = "pink"; +static const char name_plum[] PROGMEM = "plum"; +static const char name_powderblue[] PROGMEM = "powderblue"; +static const char name_rosybrown[] PROGMEM = "rosybrown"; +static const char name_royalblue[] PROGMEM = "royalblue"; +static const char name_saddlebrown[] PROGMEM = "saddlebrown"; +static const char name_salmon[] PROGMEM = "salmon"; +static const char name_sandybrown[] PROGMEM = "sandybrown"; +static const char name_seagreen[] PROGMEM = "seagreen"; +static const char name_seashell[] PROGMEM = "seashell"; +static const char name_sienna[] PROGMEM = "sienna"; +static const char name_skyblue[] PROGMEM = "skyblue"; +static const char name_slateblue[] PROGMEM = "slateblue"; +static const char name_slategray[] PROGMEM = "slategray"; +static const char name_slategrey[] PROGMEM = "slategrey"; +static const char name_snow[] PROGMEM = "snow"; +static const char name_springgreen[] PROGMEM = "springgreen"; +static const char name_steelblue[] PROGMEM = "steelblue"; +static const char name_tan[] PROGMEM = "tan"; +static const char name_thistle[] PROGMEM = "thistle"; +static const char name_tomato[] PROGMEM = "tomato"; +static const char name_turquoise[] PROGMEM = "turquoise"; +static const char name_violet[] PROGMEM = "violet"; +static const char name_wheat[] PROGMEM = "wheat"; +static const char name_whitesmoke[] PROGMEM = "whitesmoke"; +static const char name_yellowgreen[] PROGMEM = "yellowgreen"; +#endif + +const HtmlColorName HtmlColor::ColorNames[] PROGMEM = { +#if defined(USE_CSS3_COLORS) + { name_aliceblue, 0xf0f8ff}, + { name_antiquewhite, 0xfaebd7}, + { name_aqua, 0xffff}, + { name_aquamarine, 0x7fffd4}, + { name_azure, 0xf0ffff}, + { name_beige, 0xf5f5dc}, + { name_bisque, 0xffe4c4}, + { name_black, 0x0}, + { name_blanchedalmond, 0xffebcd}, + { name_blue, 0xff}, + { name_blueviolet, 0x8a2be2}, + { name_brown, 0xa52a2a}, + { name_burlywood, 0xdeb887}, + { name_cadetblue, 0x5f9ea0}, + { name_chartreuse, 0x7fff00}, + { name_chocolate, 0xd2691e}, + { name_coral, 0xff7f50}, + { name_cornflowerblue, 0x6495ed}, + { name_cornsilk, 0xfff8dc}, + { name_crimson, 0xdc143c}, + { name_cyan, 0xffff}, + { name_darkblue, 0x8b}, + { name_darkcyan, 0x8b8b}, + { name_darkgoldenrod, 0xb8860b}, + { name_darkgray, 0xa9a9a9}, + { name_darkgreen, 0x6400}, + { name_darkgrey, 0xa9a9a9}, + { name_darkkhaki, 0xbdb76b}, + { name_darkmagenta, 0x8b008b}, + { name_darkolivegreen, 0x556b2f}, + { name_darkorange, 0xff8c00}, + { name_darkorchid, 0x9932cc}, + { name_darkred, 0x8b0000}, + { name_darksalmon, 0xe9967a}, + { name_darkseagreen, 0x8fbc8f}, + { name_darkslateblue, 0x483d8b}, + { name_darkslategray, 0x2f4f4f}, + { name_darkslategrey, 0x2f4f4f}, + { name_darkturquoise, 0xced1}, + { name_darkviolet, 0x9400d3}, + { name_deeppink, 0xff1493}, + { name_deepskyblue, 0xbfff}, + { name_dimgray, 0x696969}, + { name_dimgrey, 0x696969}, + { name_dodgerblue, 0x1e90ff}, + { name_firebrick, 0xb22222}, + { name_floralwhite, 0xfffaf0}, + { name_forestgreen, 0x228b22}, + { name_fuchsia, 0xff00ff}, + { name_gainsboro, 0xdcdcdc}, + { name_ghostwhite, 0xf8f8ff}, + { name_gold, 0xffd700}, + { name_goldenrod, 0xdaa520}, + { name_gray, 0x808080}, + { name_green, 0x8000}, + { name_greenyellow, 0xadff2f}, + { name_grey, 0x808080}, + { name_honeydew, 0xf0fff0}, + { name_hotpink, 0xff69b4}, + { name_indianred, 0xcd5c5c}, + { name_indigo, 0x4b0082}, + { name_ivory, 0xfffff0}, + { name_khaki, 0xf0e68c}, + { name_lavender, 0xe6e6fa}, + { name_lavenderblush, 0xfff0f5}, + { name_lawngreen, 0x7cfc00}, + { name_lemonchiffon, 0xfffacd}, + { name_lightblue, 0xadd8e6}, + { name_lightcoral, 0xf08080}, + { name_lightcyan, 0xe0ffff}, + { name_lightgoldenrodyellow, 0xfafad2}, + { name_lightgray, 0xd3d3d3}, + { name_lightgreen, 0x90ee90}, + { name_lightgrey, 0xd3d3d3}, + { name_lightpink, 0xffb6c1}, + { name_lightsalmon, 0xffa07a}, + { name_lightseagreen, 0x20b2aa}, + { name_lightskyblue, 0x87cefa}, + { name_lightslategray, 0x778899}, + { name_lightslategrey, 0x778899}, + { name_lightsteelblue, 0xb0c4de}, + { name_lightyellow, 0xffffe0}, + { name_lime, 0xff00}, + { name_limegreen, 0x32cd32}, + { name_linen, 0xfaf0e6}, + { name_magenta, 0xff00ff}, + { name_maroon, 0x800000}, + { name_mediumaquamarine, 0x66cdaa}, + { name_mediumblue, 0xcd}, + { name_mediumorchid, 0xba55d3}, + { name_mediumpurple, 0x9370d8}, + { name_mediumseagreen, 0x3cb371}, + { name_mediumslateblue, 0x7b68ee}, + { name_mediumspringgreen, 0xfa9a}, + { name_mediumturquoise, 0x48d1cc}, + { name_mediumvioletred, 0xc71585}, + { name_midnightblue, 0x191970}, + { name_mintcream, 0xf5fffa}, + { name_mistyrose, 0xffe4e1}, + { name_moccasin, 0xffe4b5}, + { name_navajowhite, 0xffdead}, + { name_navy, 0x80}, + { name_oldlace, 0xfdf5e6}, + { name_olive, 0x808000}, + { name_olivedrab, 0x6b8e23}, + { name_orange, 0xffa500}, + { name_orangered, 0xff4500}, + { name_orchid, 0xda70d6}, + { name_palegoldenrod, 0xeee8aa}, + { name_palegreen, 0x98fb98}, + { name_paleturquoise, 0xafeeee}, + { name_palevioletred, 0xd87093}, + { name_papayawhip, 0xffefd5}, + { name_peachpuff, 0xffdab9}, + { name_peru, 0xcd853f}, + { name_pink, 0xffc0cb}, + { name_plum, 0xdda0dd}, + { name_powderblue, 0xb0e0e6}, + { name_purple, 0x800080}, + { name_red, 0xff0000}, + { name_rosybrown, 0xbc8f8f}, + { name_royalblue, 0x4169e1}, + { name_saddlebrown, 0x8b4513}, + { name_salmon, 0xfa8072}, + { name_sandybrown, 0xf4a460}, + { name_seagreen, 0x2e8b57}, + { name_seashell, 0xfff5ee}, + { name_sienna, 0xa0522d}, + { name_silver, 0xc0c0c0}, + { name_skyblue, 0x87ceeb}, + { name_slateblue, 0x6a5acd}, + { name_slategray, 0x708090}, + { name_slategrey, 0x708090}, + { name_snow, 0xfffafa}, + { name_springgreen, 0xff7f}, + { name_steelblue, 0x4682b4}, + { name_tan, 0xd2b48c}, + { name_teal, 0x8080}, + { name_thistle, 0xd8bfd8}, + { name_tomato, 0xff6347}, + { name_turquoise, 0x40e0d0}, + { name_violet, 0xee82ee}, + { name_wheat, 0xf5deb3}, + { name_white, 0xffffff}, + { name_whitesmoke, 0xf5f5f5}, + { name_yellow, 0xffff00}, + { name_yellowgreen, 0x9acd32}, +#else + { name_aqua, 0xffff}, + { name_black, 0x0}, + { name_blue, 0xff}, + { name_fuchsia, 0xff00ff}, + { name_gray, 0x808080}, + { name_green, 0x8000}, + { name_lime, 0xff00}, + { name_maroon, 0x800000}, + { name_navy, 0x80}, + { name_olive, 0x808000}, + { name_orange, 0xffa500}, + { name_purple, 0x800080}, + { name_red, 0xff0000}, + { name_silver, 0xc0c0c0}, + { name_teal, 0x8080}, + { name_white, 0xffffff}, + { 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; +} diff --git a/src/internal/HtmlColor.h b/src/internal/HtmlColor.h index d20de52..2bf743f 100644 --- a/src/internal/HtmlColor.h +++ b/src/internal/HtmlColor.h @@ -28,6 +28,20 @@ License along with NeoPixel. If not, see #include #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; };