Struct AlphaUsage

pub struct AlphaUsage(/* private fields */);

This enum describes if the alpha channel is used or not. Sometimes the pixelformat will have a size for the alpha channel, but the pixel format does actually not use the alpha channel. For example RGB32 is such a format. The RGB channels are 8 bits each, and there is no alpha channel. But the complete size for each pixel is 32. Therefore the alpha channel size is 8, but the alpha channel is ignored. Its important to note that in such situations the position of the alpha channel is significant.

C++ enum: QPixelFormat::AlphaUsage.

C++ documentation:

This enum describes if the alpha channel is used or not. Sometimes the pixelformat will have a size for the alpha channel, but the pixel format does actually not use the alpha channel. For example RGB32 is such a format. The RGB channels are 8 bits each, and there is no alpha channel. But the complete size for each pixel is 32. Therefore the alpha channel size is 8, but the alpha channel is ignored. Its important to note that in such situations the position of the alpha channel is significant.

Implementations

impl AlphaUsage

pub fn to_int(&self) -> c_int

impl AlphaUsage

pub const UsesAlpha: AlphaUsage

The alpha channel is used. (C++ enum variant: UsesAlpha = 0)

pub const IgnoresAlpha: AlphaUsage

The alpha channel is not used. (C++ enum variant: IgnoresAlpha = 1)

Trait Implementations

impl Clone for AlphaUsage

fn clone(&self) -> AlphaUsage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AlphaUsage

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

Formats the value using the given formatter.

impl From<AlphaUsage> for c_int

fn from(value: AlphaUsage) -> Self

Converts to this type from the input type.

impl From<i32> for AlphaUsage

fn from(value: c_int) -> Self

Converts to this type from the input type.

impl PartialEq for AlphaUsage

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for AlphaUsage

impl Eq for AlphaUsage

impl StructuralPartialEq for AlphaUsage