forked from Mirrorlandia_minetest/minetest
Added names colours and refactored parseColorString()
This commit is contained in:
Craig Robbins
kwolekr
parent
1cb6ea6346
commit
813c088c1c
@ -1265,6 +1265,12 @@ ColorString
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#RRGGBBAA
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^ defines a color in hexadecimal format and alpha channel
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Named colors are also supported and are equivalent to "CSS Color Module Level 4"
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(http://dev.w3.org/csswg/css-color/#named-colors). To specify the value of the
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alpha channel, append #AA to the end of the color name (e.g. colorname#08). For
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named colors the hexadecimal string representing the alpha value must (always)
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be two hexadecimal digits.
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Vector helpers
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---------------
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vector.new([x[, y, z]]) -> vector
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@ -24,12 +24,16 @@ with this program; if not, write to the Free Software Foundation, Inc.,
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#include <sstream>
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#include <iomanip>
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#include <map>
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#include "../sha1.h"
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#include "../base64.h"
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#include "../hex.h"
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#include "../porting.h"
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static bool parseHexColorString(const std::string &value, video::SColor &color);
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static bool parseNamedColorString(const std::string &value, video::SColor &color);
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#ifdef __ANDROID__
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const wchar_t* wide_chars =
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L" !\"#$%&'()*+,-./0123456789:;<=>?@"
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@ -307,62 +311,269 @@ u64 read_seed(const char *str)
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bool parseColorString(const std::string &value, video::SColor &color, bool quiet)
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{
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const char *hexpattern = NULL;
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video::SColor outcolor(255, 255, 255, 255);
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bool success;
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if (value[0] == '#') {
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if (value.size() == 9)
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hexpattern = "#RRGGBBAA";
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else if (value.size() == 7)
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hexpattern = "#RRGGBB";
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else if (value.size() == 5)
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hexpattern = "#RGBA";
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else if (value.size() == 4)
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hexpattern = "#RGB";
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}
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if (value[0] == '#')
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success = parseHexColorString(value, color);
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else
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success = parseNamedColorString(value, color);
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if (!hexpattern)
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goto fail;
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assert(strlen(hexpattern) == value.size());
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for (size_t pos = 0; pos < value.size(); ++pos) {
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// '#' in the pattern means skip that character
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if (hexpattern[pos] == '#')
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continue;
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// Else assume hexpattern[pos] is one of 'R' 'G' 'B' 'A'
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// Read one or two digits, depending on hexpattern
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unsigned char c1, c2;
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if (hexpattern[pos+1] == hexpattern[pos]) {
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// Two digits, e.g. hexpattern == "#RRGGBB"
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if (!hex_digit_decode(value[pos], c1) ||
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!hex_digit_decode(value[pos+1], c2))
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goto fail;
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++pos;
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} else {
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// One digit, e.g. hexpattern == "#RGB"
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if (!hex_digit_decode(value[pos], c1))
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goto fail;
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c2 = c1;
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}
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u32 colorpart = ((c1 & 0x0f) << 4) | (c2 & 0x0f);
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// Update outcolor with newly read color part
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if (hexpattern[pos] == 'R')
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outcolor.setRed(colorpart);
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else if (hexpattern[pos] == 'G')
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outcolor.setGreen(colorpart);
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else if (hexpattern[pos] == 'B')
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outcolor.setBlue(colorpart);
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else if (hexpattern[pos] == 'A')
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outcolor.setAlpha(colorpart);
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}
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color = outcolor;
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return true;
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fail:
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if (!quiet)
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if (!success && !quiet)
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errorstream << "Invalid color: \"" << value << "\"" << std::endl;
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return false;
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return success;
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}
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static bool parseHexColorString(const std::string &value, video::SColor &color)
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{
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unsigned char components[] = { 0x00, 0x00, 0x00, 0xff }; // R,G,B,A
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if (value[0] != '#')
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return false;
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size_t len = value.size();
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bool short_form;
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if (len == 9 || len == 7) // #RRGGBBAA or #RRGGBB
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short_form = false;
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else if (len == 5 || len == 4) // #RGBA or #RGB
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short_form = true;
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else
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return false;
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bool success = true;
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for (size_t pos = 1, cc = 0; pos < len; pos++, cc++) {
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assert(cc < sizeof components / sizeof components[0]);
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if (short_form) {
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unsigned char d;
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if (!hex_digit_decode(value[pos], d)) {
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success = false;
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break;
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}
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components[cc] = (d & 0xf) << 4 | (d & 0xf);
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} else {
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unsigned char d1, d2;
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if (!hex_digit_decode(value[pos], d1) ||
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!hex_digit_decode(value[pos+1], d2)) {
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success = false;
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break;
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}
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components[cc] = (d1 & 0xf) << 4 | (d2 & 0xf);
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pos++; // skip the second digit -- it's already used
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}
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}
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if (success) {
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color.setRed(components[0]);
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color.setGreen(components[1]);
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color.setBlue(components[2]);
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color.setAlpha(components[3]);
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}
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return success;
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}
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struct ColorContainer {
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ColorContainer();
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std::map<const std::string, u32> colors;
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};
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ColorContainer::ColorContainer()
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{
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colors["aliceblue"] = 0xf0f8ff;
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colors["antiquewhite"] = 0xfaebd7;
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colors["aqua"] = 0x00ffff;
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colors["aquamarine"] = 0x7fffd4;
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colors["azure"] = 0xf0ffff;
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colors["beige"] = 0xf5f5dc;
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colors["bisque"] = 0xffe4c4;
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colors["black"] = 00000000;
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colors["blanchedalmond"] = 0xffebcd;
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colors["blue"] = 0x0000ff;
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colors["blueviolet"] = 0x8a2be2;
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colors["brown"] = 0xa52a2a;
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colors["burlywood"] = 0xdeb887;
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colors["cadetblue"] = 0x5f9ea0;
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colors["chartreuse"] = 0x7fff00;
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colors["chocolate"] = 0xd2691e;
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colors["coral"] = 0xff7f50;
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colors["cornflowerblue"] = 0x6495ed;
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colors["cornsilk"] = 0xfff8dc;
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colors["crimson"] = 0xdc143c;
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colors["cyan"] = 0x00ffff;
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colors["darkblue"] = 0x00008b;
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colors["darkcyan"] = 0x008b8b;
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colors["darkgoldenrod"] = 0xb8860b;
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colors["darkgray"] = 0xa9a9a9;
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colors["darkgreen"] = 0x006400;
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colors["darkkhaki"] = 0xbdb76b;
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colors["darkmagenta"] = 0x8b008b;
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colors["darkolivegreen"] = 0x556b2f;
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colors["darkorange"] = 0xff8c00;
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colors["darkorchid"] = 0x9932cc;
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colors["darkred"] = 0x8b0000;
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colors["darksalmon"] = 0xe9967a;
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colors["darkseagreen"] = 0x8fbc8f;
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colors["darkslateblue"] = 0x483d8b;
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colors["darkslategray"] = 0x2f4f4f;
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colors["darkturquoise"] = 0x00ced1;
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colors["darkviolet"] = 0x9400d3;
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colors["deeppink"] = 0xff1493;
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colors["deepskyblue"] = 0x00bfff;
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colors["dimgray"] = 0x696969;
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colors["dodgerblue"] = 0x1e90ff;
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colors["firebrick"] = 0xb22222;
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colors["floralwhite"] = 0xfffaf0;
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colors["forestgreen"] = 0x228b22;
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colors["fuchsia"] = 0xff00ff;
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colors["gainsboro"] = 0xdcdcdc;
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colors["ghostwhite"] = 0xf8f8ff;
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colors["gold"] = 0xffd700;
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colors["goldenrod"] = 0xdaa520;
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colors["gray"] = 0x808080;
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colors["green"] = 0x008000;
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colors["greenyellow"] = 0xadff2f;
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colors["honeydew"] = 0xf0fff0;
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colors["hotpink"] = 0xff69b4;
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colors["indianred "] = 0xcd5c5c;
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colors["indigo "] = 0x4b0082;
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colors["ivory"] = 0xfffff0;
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colors["khaki"] = 0xf0e68c;
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colors["lavender"] = 0xe6e6fa;
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colors["lavenderblush"] = 0xfff0f5;
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colors["lawngreen"] = 0x7cfc00;
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colors["lemonchiffon"] = 0xfffacd;
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colors["lightblue"] = 0xadd8e6;
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colors["lightcoral"] = 0xf08080;
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colors["lightcyan"] = 0xe0ffff;
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colors["lightgoldenrodyellow"] = 0xfafad2;
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colors["lightgray"] = 0xd3d3d3;
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colors["lightgreen"] = 0x90ee90;
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colors["lightpink"] = 0xffb6c1;
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colors["lightsalmon"] = 0xffa07a;
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colors["lightseagreen"] = 0x20b2aa;
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colors["lightskyblue"] = 0x87cefa;
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colors["lightslategray"] = 0x778899;
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colors["lightsteelblue"] = 0xb0c4de;
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colors["lightyellow"] = 0xffffe0;
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colors["lime"] = 0x00ff00;
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colors["limegreen"] = 0x32cd32;
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colors["linen"] = 0xfaf0e6;
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colors["magenta"] = 0xff00ff;
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colors["maroon"] = 0x800000;
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colors["mediumaquamarine"] = 0x66cdaa;
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colors["mediumblue"] = 0x0000cd;
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colors["mediumorchid"] = 0xba55d3;
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colors["mediumpurple"] = 0x9370db;
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colors["mediumseagreen"] = 0x3cb371;
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colors["mediumslateblue"] = 0x7b68ee;
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colors["mediumspringgreen"] = 0x00fa9a;
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colors["mediumturquoise"] = 0x48d1cc;
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colors["mediumvioletred"] = 0xc71585;
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colors["midnightblue"] = 0x191970;
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colors["mintcream"] = 0xf5fffa;
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colors["mistyrose"] = 0xffe4e1;
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colors["moccasin"] = 0xffe4b5;
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colors["navajowhite"] = 0xffdead;
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colors["navy"] = 0x000080;
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colors["oldlace"] = 0xfdf5e6;
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colors["olive"] = 0x808000;
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colors["olivedrab"] = 0x6b8e23;
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colors["orange"] = 0xffa500;
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colors["orangered"] = 0xff4500;
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colors["orchid"] = 0xda70d6;
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colors["palegoldenrod"] = 0xeee8aa;
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colors["palegreen"] = 0x98fb98;
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colors["paleturquoise"] = 0xafeeee;
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colors["palevioletred"] = 0xdb7093;
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colors["papayawhip"] = 0xffefd5;
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colors["peachpuff"] = 0xffdab9;
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colors["peru"] = 0xcd853f;
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colors["pink"] = 0xffc0cb;
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colors["plum"] = 0xdda0dd;
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colors["powderblue"] = 0xb0e0e6;
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colors["purple"] = 0x800080;
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colors["red"] = 0xff0000;
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colors["rosybrown"] = 0xbc8f8f;
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colors["royalblue"] = 0x4169e1;
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colors["saddlebrown"] = 0x8b4513;
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colors["salmon"] = 0xfa8072;
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colors["sandybrown"] = 0xf4a460;
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colors["seagreen"] = 0x2e8b57;
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colors["seashell"] = 0xfff5ee;
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colors["sienna"] = 0xa0522d;
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colors["silver"] = 0xc0c0c0;
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colors["skyblue"] = 0x87ceeb;
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colors["slateblue"] = 0x6a5acd;
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colors["slategray"] = 0x708090;
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colors["snow"] = 0xfffafa;
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colors["springgreen"] = 0x00ff7f;
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colors["steelblue"] = 0x4682b4;
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colors["tan"] = 0xd2b48c;
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colors["teal"] = 0x008080;
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colors["thistle"] = 0xd8bfd8;
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colors["tomato"] = 0xff6347;
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colors["turquoise"] = 0x40e0d0;
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colors["violet"] = 0xee82ee;
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colors["wheat"] = 0xf5deb3;
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colors["white"] = 0xffffff;
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colors["whitesmoke"] = 0xf5f5f5;
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colors["yellow"] = 0xffff00;
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colors["yellowgreen"] = 0x9acd32;
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}
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static const ColorContainer named_colors;
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static bool parseNamedColorString(const std::string &value, video::SColor &color)
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{
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std::string color_name;
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std::string alpha_string;
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/* If the string has a # in it, assume this is the start of a specified
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* alpha value (if it isn't the string is invalid and the error will be
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* caught later on, either because the color name won't be found or the
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* alpha value will fail conversion)
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*/
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size_t alpha_pos = value.find('#');
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if (alpha_pos != std::string::npos) {
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color_name = value.substr(0, alpha_pos);
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alpha_string = value.substr(alpha_pos + 1);
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} else {
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color_name = value;
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}
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color_name = lowercase(value);
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std::map<const std::string, unsigned>::const_iterator it;
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it = named_colors.colors.find(color_name);
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if (it == named_colors.colors.end())
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return false;
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u32 color_temp = it->second;
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/* An empty string for alpha is ok (none of the color table entries
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* have an alpha value either). Color strings without an alpha specified
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* are interpreted as fully opaque
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*
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* For named colors the supplied alpha string (representing a hex value)
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* must be exactly two digits. For example: colorname#08
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*/
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if (!alpha_string.empty()) {
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if (alpha_string.length() != 2)
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return false;
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unsigned char d1, d2;
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if (!hex_digit_decode(alpha_string.at(0), d1)
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|| !hex_digit_decode(alpha_string.at(1), d2))
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return false;
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color_temp |= ((d1 & 0xf) << 4 | (d2 & 0xf)) << 24;
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} else {
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color_temp |= 0xff << 24; // Fully opaque
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}
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color = video::SColor(color_temp);
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return true;
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}
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@ -127,12 +127,7 @@ inline std::string lowercase(const std::string &s)
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{
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std::string s2;
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for(size_t i = 0; i < s.size(); i++)
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{
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char c = s[i];
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if(c >= 'A' && c <= 'Z')
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c -= 'A' - 'a';
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s2 += c;
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}
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s2[i] = tolower(s.at(i));
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return s2;
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}
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