Enum gdk4::MemoryFormat

#[non_exhaustive]
pub enum MemoryFormat {
    B8g8r8a8Premultiplied,
    A8r8g8b8Premultiplied,
    R8g8b8a8Premultiplied,
    B8g8r8a8,
    A8r8g8b8,
    R8g8b8a8,
    A8b8g8r8,
    R8g8b8,
    B8g8r8,
    NFormats,
    // some variants omitted
}

MemoryFormat describes a format that bytes can have in memory.

It describes formats by listing the contents of the memory passed to it. So GDK_MEMORY_A8R8G8B8 will be 1 byte (8 bits) of alpha, followed by a byte each of red, green and blue. It is not endian-dependent, so CAIRO_FORMAT_ARGB32 is represented by different GdkMemoryFormats on architectures with different endiannesses.

Its naming is modelled after VkFormat for details).

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

B8g8r8a8Premultiplied

4 bytes; for blue, green, red, alpha. The color values are premultiplied with the alpha value.

A8r8g8b8Premultiplied

4 bytes; for alpha, red, green, blue. The color values are premultiplied with the alpha value.

R8g8b8a8Premultiplied

4 bytes; for red, green, blue, alpha The color values are premultiplied with the alpha value.

B8g8r8a8

4 bytes; for blue, green, red, alpha.

A8r8g8b8

4 bytes; for alpha, red, green, blue.

R8g8b8a8

4 bytes; for red, green, blue, alpha.

A8b8g8r8

4 bytes; for alpha, blue, green, red.

R8g8b8

3 bytes; for red, green, blue. The data is opaque.

B8g8r8

3 bytes; for blue, green, red. The data is opaque.

NFormats

The number of formats. This value will change as more formats get added, so do not rely on its concrete integer.

Trait Implementations

impl Clone for MemoryFormat

fn clone(&self) -> MemoryFormat

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MemoryFormat

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for MemoryFormat

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> FromValue<'a> for MemoryFormat

type Checker = GenericValueTypeChecker<Self>

Value type checker.

unsafe fn from_value(value: &'a Value) -> Self

Get the contained value from a Value.

impl Hash for MemoryFormat

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl Ord for MemoryFormat

fn cmp(&self, other: &MemoryFormat) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl PartialEq<MemoryFormat> for MemoryFormat

fn eq(&self, other: &MemoryFormat) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &MemoryFormat) -> bool

This method tests for !=.

impl PartialOrd<MemoryFormat> for MemoryFormat

fn partial_cmp(&self, other: &MemoryFormat) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StaticType for MemoryFormat

fn static_type() -> Type

Returns the type identifier of Self.

impl ToValue for MemoryFormat

fn to_value(&self) -> Value

Convert a value to a Value.

fn value_type(&self) -> Type

Returns the type identifer of self.

impl ValueType for MemoryFormat

type Type = Self

Type to get the Type from.

impl Copy for MemoryFormat

impl Eq for MemoryFormat

impl StructuralEq for MemoryFormat

impl StructuralPartialEq for MemoryFormat