slint::Color Class
class Color;#include <slint.h>Color represents a color in the Slint run-time, represented using 8-bit channels for red, green, blue and the alpha (opacity).
Friends
Section titled “Friends” operator==
Section titled “ operator==”bool operator==(const Color &lhs, const Color &rhs)=defaultReturns true if lhs has the same values for the individual color channels as rhs; false otherwise.
operator<<
Section titled “ operator<<”std::ostream & operator<<(std::ostream &stream, const Color &color)Writes the color to the specified stream and returns a reference to the stream.
Public Functions
Section titled “Public Functions”slint::Color::Color()Default constructs a new color that is entirely transparent.
slint::Color::Color(const RgbaColor< uint8_t > &col)Constructs a new color from the given RgbaColor<uint8_t> col.
slint::Color::Color(const RgbaColor< float > &col)Constructs a new color from the given RgbaColor<float> col.
as_argb_encoded
Section titled “ as_argb_encoded”uint32_t slint::Color::as_argb_encoded() constReturns (alpha, red, green, blue) encoded as uint32_t.
to_argb_uint
Section titled “ to_argb_uint”RgbaColor< uint8_t > slint::Color::to_argb_uint() constConverts this color to an RgbaColor struct for easy destructuring.
to_argb_float
Section titled “ to_argb_float”RgbaColor< float > slint::Color::to_argb_float() constConverts this color to an RgbaColor struct for easy destructuring.
to_hsva
Section titled “ to_hsva”HsvaColor slint::Color::to_hsva() constConvert this color to the HSV color space.
Returns: a new HsvaColor.
to_oklch
Section titled “ to_oklch”OklchColor slint::Color::to_oklch() constConvert this color to the Oklch color space.
Returns: a new OklchColor.
uint8_t slint::Color::red() constReturns the red channel of the color as u8 in the range 0..255.
uint8_t slint::Color::green() constReturns the green channel of the color as u8 in the range 0..255.
uint8_t slint::Color::blue() constReturns the blue channel of the color as u8 in the range 0..255.
uint8_t slint::Color::alpha() constReturns the alpha channel of the color as u8 in the range 0..255.
brighter
Section titled “ brighter”Color slint::Color::brighter(float factor) constReturns a new version of this color that has the brightness increased by the specified factor. This is done by converting the color to the HSV color space and multiplying the brightness (value) with (1 + factor). The result is converted back to RGB and the alpha channel is unchanged. So for example brighter(0.2) will increase the brightness by 20%, and calling brighter(-0.5) will return a color that’s 50% darker.
darker
Section titled “ darker”Color slint::Color::darker(float factor) constReturns a new version of this color that has the brightness decreased by the specified factor. This is done by converting the color to the HSV color space and dividing the brightness (value) by (1 + factor). The result is converted back to RGB and the alpha channel is unchanged. So for example darker(0.3) will decrease the brightness by 30%.
transparentize
Section titled “ transparentize”Color slint::Color::transparentize(float factor) constReturns a new version of this color with the opacity decreased by factor.
The transparency is obtained by multiplying the alpha channel by (1 - factor).
Color slint::Color::mix(const Color &other, float factor) constReturns a new color that is a mix of this color and other. The specified factor is clamped to be between 0.0 and 1.0 and then applied to this color, while 1.0 - factor is applied to other.
with_alpha
Section titled “ with_alpha”Color slint::Color::with_alpha(float alpha) constReturns a new version of this color with the opacity set to alpha.
Public Static Functions
Section titled “Public Static Functions” from_argb_encoded
Section titled “ from_argb_encoded”static Color slint::Color::from_argb_encoded(uint32_t argb_encoded)Construct a color from an integer encoded as 0xAARRGGBB
from_argb_uint8
Section titled “ from_argb_uint8”static Color slint::Color::from_argb_uint8(uint8_t alpha, uint8_t red, uint8_t green, uint8_t blue)Construct a color from the alpha, red, green and blue color channel parameters.
from_rgb_uint8
Section titled “ from_rgb_uint8”static Color slint::Color::from_rgb_uint8(uint8_t red, uint8_t green, uint8_t blue)Construct a color from the red, green and blue color channel parameters. The alpha channel will have the value 255.
from_argb_float
Section titled “ from_argb_float”static Color slint::Color::from_argb_float(float alpha, float red, float green, float blue)Construct a color from the alpha, red, green and blue color channel parameters.
from_rgb_float
Section titled “ from_rgb_float”static Color slint::Color::from_rgb_float(float red, float green, float blue)Construct a color from the red, green and blue color channel parameters. The alpha channel will have the value 255.
from_hsva
Section titled “ from_hsva”static Color slint::Color::from_hsva(float h, float s, float v, float a)Construct a color from the HSV color space components. The hue is expected to be in the range between 0 and 360, and the other parameters between 0 and 1.
from_oklch
Section titled “ from_oklch”static Color slint::Color::from_oklch(float l, float c, float h, float a)Construct a color from the Oklch color space components. Oklch is a perceptually uniform color space. The lightness is expected to be in the range between 0 and 1, chroma typically between 0 and 0.4, hue between 0 and 360, and alpha between 0 and 1.
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