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author | Konstantin Käfer <mail@kkaefer.com> | 2014-03-12 12:42:51 +0100 |
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committer | Konstantin Käfer <mail@kkaefer.com> | 2014-03-12 12:43:18 +0100 |
commit | 72ac0c9c317f3908a342e54f78c9edf270fbd6ce (patch) | |
tree | e0fe25c1de4fcf879ff2b3d09f4f1772e2f95d5d /src/csscolorparser | |
parent | b3e9a1b42c33a23d8951860db37648624cf88d6c (diff) | |
download | qtlocation-mapboxgl-72ac0c9c317f3908a342e54f78c9edf270fbd6ce.tar.gz |
use external library
Diffstat (limited to 'src/csscolorparser')
-rw-r--r-- | src/csscolorparser/csscolorparser.cpp | 286 |
1 files changed, 286 insertions, 0 deletions
diff --git a/src/csscolorparser/csscolorparser.cpp b/src/csscolorparser/csscolorparser.cpp new file mode 100644 index 0000000000..d16299c75d --- /dev/null +++ b/src/csscolorparser/csscolorparser.cpp @@ -0,0 +1,286 @@ +// (c) Dean McNamee <dean@gmail.com>, 2012. +// C++ port by Konstantin Käfer <mail@kkaefer.com>, 2014. +// +// https://github.com/deanm/css-color-parser-js +// https://github.com/kkaefer/css-color-parser-cpp +// +// Permission is hereby granted, free of charge, to any person obtaining a copy +// of this software and associated documentation files (the "Software"), to +// deal in the Software without restriction, including without limitation the +// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or +// sell copies of the Software, and to permit persons to whom the Software is +// furnished to do so, subject to the following conditions: +// +// The above copyright notice and this permission notice shall be included in +// all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING +// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS +// IN THE SOFTWARE. + +#include <csscolorparser/csscolorparser.hpp> + +#include <cstdint> +#include <vector> +#include <sstream> +#include <cmath> +#include <map> + +using namespace CSSColorParser; + +// http://www.w3.org/TR/css3-color/ +const std::map<std::string, Color> kCSSColorTable = { + { "transparent", { 0, 0, 0, 0 } }, { "aliceblue", { 240, 248, 255, 1 } }, + { "antiquewhite", { 250, 235, 215, 1 } }, { "aqua", { 0, 255, 255, 1 } }, + { "aquamarine", { 127, 255, 212, 1 } }, { "azure", { 240, 255, 255, 1 } }, + { "beige", { 245, 245, 220, 1 } }, { "bisque", { 255, 228, 196, 1 } }, + { "black", { 0, 0, 0, 1 } }, { "blanchedalmond", { 255, 235, 205, 1 } }, + { "blue", { 0, 0, 255, 1 } }, { "blueviolet", { 138, 43, 226, 1 } }, + { "brown", { 165, 42, 42, 1 } }, { "burlywood", { 222, 184, 135, 1 } }, + { "cadetblue", { 95, 158, 160, 1 } }, { "chartreuse", { 127, 255, 0, 1 } }, + { "chocolate", { 210, 105, 30, 1 } }, { "coral", { 255, 127, 80, 1 } }, + { "cornflowerblue", { 100, 149, 237, 1 } }, { "cornsilk", { 255, 248, 220, 1 } }, + { "crimson", { 220, 20, 60, 1 } }, { "cyan", { 0, 255, 255, 1 } }, + { "darkblue", { 0, 0, 139, 1 } }, { "darkcyan", { 0, 139, 139, 1 } }, + { "darkgoldenrod", { 184, 134, 11, 1 } }, { "darkgray", { 169, 169, 169, 1 } }, + { "darkgreen", { 0, 100, 0, 1 } }, { "darkgrey", { 169, 169, 169, 1 } }, + { "darkkhaki", { 189, 183, 107, 1 } }, { "darkmagenta", { 139, 0, 139, 1 } }, + { "darkolivegreen", { 85, 107, 47, 1 } }, { "darkorange", { 255, 140, 0, 1 } }, + { "darkorchid", { 153, 50, 204, 1 } }, { "darkred", { 139, 0, 0, 1 } }, + { "darksalmon", { 233, 150, 122, 1 } }, { "darkseagreen", { 143, 188, 143, 1 } }, + { "darkslateblue", { 72, 61, 139, 1 } }, { "darkslategray", { 47, 79, 79, 1 } }, + { "darkslategrey", { 47, 79, 79, 1 } }, { "darkturquoise", { 0, 206, 209, 1 } }, + { "darkviolet", { 148, 0, 211, 1 } }, { "deeppink", { 255, 20, 147, 1 } }, + { "deepskyblue", { 0, 191, 255, 1 } }, { "dimgray", { 105, 105, 105, 1 } }, + { "dimgrey", { 105, 105, 105, 1 } }, { "dodgerblue", { 30, 144, 255, 1 } }, + { "firebrick", { 178, 34, 34, 1 } }, { "floralwhite", { 255, 250, 240, 1 } }, + { "forestgreen", { 34, 139, 34, 1 } }, { "fuchsia", { 255, 0, 255, 1 } }, + { "gainsboro", { 220, 220, 220, 1 } }, { "ghostwhite", { 248, 248, 255, 1 } }, + { "gold", { 255, 215, 0, 1 } }, { "goldenrod", { 218, 165, 32, 1 } }, + { "gray", { 128, 128, 128, 1 } }, { "green", { 0, 128, 0, 1 } }, + { "greenyellow", { 173, 255, 47, 1 } }, { "grey", { 128, 128, 128, 1 } }, + { "honeydew", { 240, 255, 240, 1 } }, { "hotpink", { 255, 105, 180, 1 } }, + { "indianred", { 205, 92, 92, 1 } }, { "indigo", { 75, 0, 130, 1 } }, + { "ivory", { 255, 255, 240, 1 } }, { "khaki", { 240, 230, 140, 1 } }, + { "lavender", { 230, 230, 250, 1 } }, { "lavenderblush", { 255, 240, 245, 1 } }, + { "lawngreen", { 124, 252, 0, 1 } }, { "lemonchiffon", { 255, 250, 205, 1 } }, + { "lightblue", { 173, 216, 230, 1 } }, { "lightcoral", { 240, 128, 128, 1 } }, + { "lightcyan", { 224, 255, 255, 1 } }, { "lightgoldenrodyellow", { 250, 250, 210, 1 } }, + { "lightgray", { 211, 211, 211, 1 } }, { "lightgreen", { 144, 238, 144, 1 } }, + { "lightgrey", { 211, 211, 211, 1 } }, { "lightpink", { 255, 182, 193, 1 } }, + { "lightsalmon", { 255, 160, 122, 1 } }, { "lightseagreen", { 32, 178, 170, 1 } }, + { "lightskyblue", { 135, 206, 250, 1 } }, { "lightslategray", { 119, 136, 153, 1 } }, + { "lightslategrey", { 119, 136, 153, 1 } }, { "lightsteelblue", { 176, 196, 222, 1 } }, + { "lightyellow", { 255, 255, 224, 1 } }, { "lime", { 0, 255, 0, 1 } }, + { "limegreen", { 50, 205, 50, 1 } }, { "linen", { 250, 240, 230, 1 } }, + { "magenta", { 255, 0, 255, 1 } }, { "maroon", { 128, 0, 0, 1 } }, + { "mediumaquamarine", { 102, 205, 170, 1 } }, { "mediumblue", { 0, 0, 205, 1 } }, + { "mediumorchid", { 186, 85, 211, 1 } }, { "mediumpurple", { 147, 112, 219, 1 } }, + { "mediumseagreen", { 60, 179, 113, 1 } }, { "mediumslateblue", { 123, 104, 238, 1 } }, + { "mediumspringgreen", { 0, 250, 154, 1 } }, { "mediumturquoise", { 72, 209, 204, 1 } }, + { "mediumvioletred", { 199, 21, 133, 1 } }, { "midnightblue", { 25, 25, 112, 1 } }, + { "mintcream", { 245, 255, 250, 1 } }, { "mistyrose", { 255, 228, 225, 1 } }, + { "moccasin", { 255, 228, 181, 1 } }, { "navajowhite", { 255, 222, 173, 1 } }, + { "navy", { 0, 0, 128, 1 } }, { "oldlace", { 253, 245, 230, 1 } }, + { "olive", { 128, 128, 0, 1 } }, { "olivedrab", { 107, 142, 35, 1 } }, + { "orange", { 255, 165, 0, 1 } }, { "orangered", { 255, 69, 0, 1 } }, + { "orchid", { 218, 112, 214, 1 } }, { "palegoldenrod", { 238, 232, 170, 1 } }, + { "palegreen", { 152, 251, 152, 1 } }, { "paleturquoise", { 175, 238, 238, 1 } }, + { "palevioletred", { 219, 112, 147, 1 } }, { "papayawhip", { 255, 239, 213, 1 } }, + { "peachpuff", { 255, 218, 185, 1 } }, { "peru", { 205, 133, 63, 1 } }, + { "pink", { 255, 192, 203, 1 } }, { "plum", { 221, 160, 221, 1 } }, + { "powderblue", { 176, 224, 230, 1 } }, { "purple", { 128, 0, 128, 1 } }, + { "red", { 255, 0, 0, 1 } }, { "rosybrown", { 188, 143, 143, 1 } }, + { "royalblue", { 65, 105, 225, 1 } }, { "saddlebrown", { 139, 69, 19, 1 } }, + { "salmon", { 250, 128, 114, 1 } }, { "sandybrown", { 244, 164, 96, 1 } }, + { "seagreen", { 46, 139, 87, 1 } }, { "seashell", { 255, 245, 238, 1 } }, + { "sienna", { 160, 82, 45, 1 } }, { "silver", { 192, 192, 192, 1 } }, + { "skyblue", { 135, 206, 235, 1 } }, { "slateblue", { 106, 90, 205, 1 } }, + { "slategray", { 112, 128, 144, 1 } }, { "slategrey", { 112, 128, 144, 1 } }, + { "snow", { 255, 250, 250, 1 } }, { "springgreen", { 0, 255, 127, 1 } }, + { "steelblue", { 70, 130, 180, 1 } }, { "tan", { 210, 180, 140, 1 } }, + { "teal", { 0, 128, 128, 1 } }, { "thistle", { 216, 191, 216, 1 } }, + { "tomato", { 255, 99, 71, 1 } }, { "turquoise", { 64, 224, 208, 1 } }, + { "violet", { 238, 130, 238, 1 } }, { "wheat", { 245, 222, 179, 1 } }, + { "white", { 255, 255, 255, 1 } }, { "whitesmoke", { 245, 245, 245, 1 } }, + { "yellow", { 255, 255, 0, 1 } }, { "yellowgreen", { 154, 205, 50, 1 } } +}; + + +template <typename T> +uint8_t clamp_css_byte(T i) { // Clamp to integer 0 .. 255. + i = round(i); // Seems to be what Chrome does (vs truncation). + return i < 0 ? 0 : i > 255 ? 255 : i; +} + +template <typename T> +float clamp_css_float(T f) { // Clamp to float 0.0 .. 1.0. + return f < 0 ? 0 : f > 1 ? 1 : f; +} + +float parseFloat(const std::string& str) { + return strtof(str.c_str(), nullptr); +} + +int64_t parseInt(const std::string& str, uint8_t base = 10) { + return strtoll(str.c_str(), nullptr, base); +} + +uint8_t parse_css_int(const std::string& str) { // int or percentage. + if (str.length() && str.back() == '%') { + return clamp_css_byte(parseFloat(str) / 100.0f * 255.0f); + } else { + return clamp_css_byte(parseInt(str)); + } +} + +float parse_css_float(const std::string& str) { // float or percentage. + if (str.length() && str.back() == '%') { + return clamp_css_float(parseFloat(str) / 100.0f); + } else { + return clamp_css_float(parseFloat(str)); + } +} + +float css_hue_to_rgb(float m1, float m2, float h) { + if (h < 0.0f) { + h += 1.0f; + } else if (h > 1.0f) { + h -= 1.0f; + } + + if (h * 6.0f < 1.0f) { + return m1 + (m2 - m1) * h * 6.0f; + } + if (h * 2.0f < 1.0f) { + return m2; + } + if (h * 3.0f < 2.0f) { + return m1 + (m2 - m1) * (2.0 / 3.0 - h) * 6.0f; + } + return m1; +} + + + +std::vector<std::string> split(const std::string& s, char delim) { + std::vector<std::string> elems; + std::stringstream ss(s); + std::string item; + while (std::getline(ss, item, delim)) { + elems.push_back(item); + } + return elems; +} + +Color CSSColorParser::parse(const std::string& css_str) { + std::string str = css_str; + + // Remove all whitespace, not compliant, but should just be more accepting. + str.erase(std::remove(str.begin(), str.end(), ' '), str.end()); + + // Convert to lowercase. + std::transform(str.begin(), str.end(), str.begin(), ::tolower); + + // Color keywords (and transparent) lookup. + auto it = kCSSColorTable.find(str); + if (it != kCSSColorTable.end()) { + return it->second; + } + + // #abc and #abc123 syntax. + if (str.length() && str.front() == '#') { + if (str.length() == 4) { + int64_t iv = parseInt(str.substr(1), 16); // TODO(deanm): Stricter parsing. + if (!(iv >= 0 && iv <= 0xfff)) { + return {}; + } else { + return { + static_cast<uint8_t>(((iv & 0xf00) >> 4) | ((iv & 0xf00) >> 8)), + static_cast<uint8_t>((iv & 0xf0) | ((iv & 0xf0) >> 4)), + static_cast<uint8_t>((iv & 0xf) | ((iv & 0xf) << 4)), + 1 + }; + } + } else if (str.length() == 7) { + int64_t iv = parseInt(str.substr(1), 16); // TODO(deanm): Stricter parsing. + if (!(iv >= 0 && iv <= 0xffffff)) { + return {}; // Covers NaN. + } else { + return { + static_cast<uint8_t>((iv & 0xff0000) >> 16), + static_cast<uint8_t>((iv & 0xff00) >> 8), + static_cast<uint8_t>(iv & 0xff), + 1 + }; + } + } + + return {}; + } + + size_t op = str.find_first_of('('), ep = str.find_first_of(')'); + if (op != std::string::npos && ep + 1 == str.length()) { + const std::string fname = str.substr(0, op); + const std::vector<std::string> params = split(str.substr(op + 1, ep - (op + 1)), ','); + + float alpha = 1.0f; + + if (fname == "rgba" || fname == "rgb") { + if (fname == "rgba") { + if (params.size() != 4) { + return {}; + } + alpha = parse_css_float(params.back()); + } else { + if (params.size() != 3) { + return {}; + } + } + + return { + parse_css_int(params[0]), + parse_css_int(params[1]), + parse_css_int(params[2]), + alpha + }; + + } else if (fname == "hsla" || fname == "hsl") { + if (fname == "hsla") { + if (params.size() != 4) { + return {}; + } + alpha = parse_css_float(params.back()); + } else { + if (params.size() != 3) { + return {}; + } + } + + float h = parseFloat(params[0]) / 360.0f; + while (h < 0.0f) h++; + while (h > 1.0f) h--; + + // NOTE(deanm): According to the CSS spec s/l should only be + // percentages, but we don't bother and let float or percentage. + float s = parse_css_float(params[1]); + float l = parse_css_float(params[2]); + + float m2 = l <= 0.5f ? l * (s + 1.0f) : l + s - l * s; + float m1 = l * 2.0f - m2; + + return { + clamp_css_byte(css_hue_to_rgb(m1, m2, h + 1.0f / 3.0f) * 255.0f), + clamp_css_byte(css_hue_to_rgb(m1, m2, h) * 255.0f), + clamp_css_byte(css_hue_to_rgb(m1, m2, h - 1.0f / 3.0f) * 255.0f), + alpha + }; + } + } + + return {}; +} |