58 lines
1.5 KiB
C++
58 lines
1.5 KiB
C++
#include <mbgl/util/color.hpp>
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#include <mbgl/util/string.hpp>
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#include <csscolorparser/csscolorparser.hpp>
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namespace mbgl {
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std::optional<Color> Color::parse(const std::string& s) {
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auto css_color = CSSColorParser::parse(s);
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// Premultiply the color.
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if (css_color) {
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const float factor = css_color->a / 255;
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return {{css_color->r * factor, css_color->g * factor, css_color->b * factor, css_color->a}};
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} else {
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return {};
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}
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}
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std::string Color::stringify() const {
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std::array<double, 4> array = toArray();
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return "rgba(" + util::toString(array[0]) + "," + util::toString(array[1]) + "," + util::toString(array[2]) + "," +
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util::toString(array[3]) + ")";
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}
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std::array<double, 4> Color::toArray() const {
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if (a == 0) {
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return {{0, 0, 0, 0}};
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} else {
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return {{
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r * 255 / a,
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g * 255 / a,
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b * 255 / a,
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floor(a * 100 + .5) / 100 // round to 2 decimal places
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}};
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}
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}
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mbgl::Value Color::toObject() const {
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return mapbox::base::ValueObject{{"r", static_cast<double>(r)},
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{"g", static_cast<double>(g)},
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{"b", static_cast<double>(b)},
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{"a", static_cast<double>(a)}};
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}
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mbgl::Value Color::serialize() const {
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std::array<double, 4> array = toArray();
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return std::vector<mbgl::Value>{
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std::string("rgba"),
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array[0],
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array[1],
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array[2],
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array[3],
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};
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}
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} // namespace mbgl
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