#[repr(transparent)]pub struct RGBA { /* private fields */ }
Expand description
A RGBA
is used to represent a (possibly translucent)
color, in a way that is compatible with cairo’s notion of color.
Implementations
sourceimpl RGBA
impl RGBA
sourcepub fn to_str(&self) -> GString
pub fn to_str(&self) -> GString
Returns a textual specification of self
in the form
rgb(r,g,b)
or
rgba(r g,b,a)
,
where “r”, “g”, “b” and “a” represent the red, green,
blue and alpha values respectively. “r”, “g”, and “b” are
represented as integers in the range 0 to 255, and “a”
is represented as a floating point value in the range 0 to 1.
These string forms are string forms that are supported by
the CSS3 colors module, and can be parsed by parse()
.
Note that this string representation may lose some precision, since “r”, “g” and “b” are represented as 8-bit integers. If this is a concern, you should use a different representation.
Returns
A newly allocated text string
sourceimpl RGBA
impl RGBA
pub fn new(red: f64, green: f64, blue: f64, alpha: f64) -> RGBA
pub fn red(&self) -> f64
pub fn set_red(&mut self, red: f64)
pub fn green(&self) -> f64
pub fn set_green(&mut self, green: f64)
pub fn blue(&self) -> f64
pub fn set_blue(&mut self, blue: f64)
pub fn alpha(&self) -> f64
pub fn set_alpha(&mut self, alpha: f64)
sourcepub fn parse(s: &str) -> Result<Self, BoolError>
pub fn parse(s: &str) -> Result<Self, BoolError>
Parses a textual representation of a color, filling in
the red
, green
, blue
and alpha
fields of the self
RGBA
.
The string can be either one of:
- A standard name (Taken from the X11 rgb.txt file).
- A hexadecimal value in the form “`rgb
”, “\
rrggbb”, “\
rrrgggbbb” or ”\
rrrrggggbbbb`” - A RGB color in the form “rgb(r,g,b)” (In this case the color will have full opacity)
- A RGBA color in the form “rgba(r,g,b,a)”
Where “r”, “g”, “b” and “a” are respectively the red, green, blue and alpha color values. In the last two cases, “r”, “g”, and “b” are either integers in the range 0 to 255 or percentage values in the range 0% to 100%, and a is a floating point value in the range 0 to 1.
spec
the string specifying the color
Returns
true
if the parsing succeeded
pub const BLACK: RGBA = _
pub const BLUE: RGBA = _
pub const GREEN: RGBA = _
pub const RED: RGBA = _
pub const WHITE: RGBA = _
Trait Implementations
sourceimpl StaticType for RGBA
impl StaticType for RGBA
sourcefn static_type() -> Type
fn static_type() -> Type
Self
.impl Copy for RGBA
impl Eq for RGBA
Auto Trait Implementations
impl RefUnwindSafe for RGBA
impl Send for RGBA
impl Sync for RGBA
impl Unpin for RGBA
impl UnwindSafe for RGBA
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
sourceimpl<T> StaticTypeExt for Twhere
T: StaticType,
impl<T> StaticTypeExt for Twhere
T: StaticType,
sourcefn ensure_type()
fn ensure_type()
sourceimpl<T> ToClosureReturnValue for Twhere
T: ToValue,
impl<T> ToClosureReturnValue for Twhere
T: ToValue,
fn to_closure_return_value(&self) -> Option<Value>
sourceimpl<T> ToSendValue for Twhere
T: Send + ToValue + ?Sized,
impl<T> ToSendValue for Twhere
T: Send + ToValue + ?Sized,
sourcefn to_send_value(&self) -> SendValue
fn to_send_value(&self) -> SendValue
SendValue
clone of self
.