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Color¶

Represents an RGBA color. Can be de-/serialized from/to JSON.

Example¶

#include <bdn/Color.h>
#include <bdn/Json.h>

using namespace bdn;

int main() {
    Color color("royalblue");
    json j = color;

    return 0;
}

namespace bdn {
    class Color
}

Color()

Creates an opaque black color.
Color(std::string color)

Creates a color from a string. You can specify the color via a hex value: #RRGGBBAA or #RGBA. If you omit the alpha value it will default to opaque. You can also use up to CSS Level 4 color names including transparent.
constexpr Color(std::array array)

Initializes the color with the given array of floating point component values in range [0,1] (r,g,b,a).
constexpr Color(double r, double g, double b, double a = 1.0f)

Initializes the color with the given floating point component values in range [0,1].
constexpr Color(uint32_t color)

Initializes the color with the give uint32_t value. Red is stored in the highest 8 bits, alpha is stored in the lowest 8 bits.

static Color fromAny(std::any anyColor)

Converts an std::any to Color. Throws std::bad_any_cast if no conversion possible.

std::any type calls

Color Color(std::any_cast<Color>(any))

std::string Color(std::any_cast<std::string>(any))

json (Color)std::any_cast<json>(any)
static Color fromIntAlphaFirst(uint32_t color)

Same as Color(uint32_t) but takes the alpha value from the highest 8 bits.

std::any type	calls
Color	Color(std::any_cast<Color>(any))
std::string	Color(std::any_cast<std::string>(any))
json	(Color)std::any_cast<json>(any)

double red() const

Returns the red component as a floating point value in range [0,1].
double green() const

Returns the green component as a floating point value in range [0,1].
double blue() const

Returns the blue component as a floating point value in range [0,1].
double alpha() const

Returns the alpha component as a floating point value in range [0,1].

std::array asArray() const

Returns the components as an std::array of doubles.
template std::array asIntArray() const

Returns the components as an std::array<T> where T is the int type to convert to. The internal floating point values are scaled from 0 to std::numerical_limits<T>::max().

uint32_t asInt() const

Returns all components as one uint32_t in the form 0xRRGGBBAA.
uint32_t asIntAlphaFirst() const

Returns all components as one uint32_t in the form 0xAARRGGBB.

Color.h