Struct png::common::ContentLightLevelInfo

pub struct ContentLightLevelInfo {
    pub max_content_light_level: u32,
    pub max_frame_average_light_level: u32,
}

Content light level information of HDR content.

See https://www.w3.org/TR/png-3/#cLLI-chunk for more details.

Fields

max_content_light_level: u32

Maximum Content Light Level indicates the maximum light level of any single pixel (in cd/m^2, also known as nits) of the entire playback sequence.

The value is expressed in units of 0.0001 cd/m^2 - for example if this field is set to 10000000 then it indicates 1000 cd/m^2.

A value of zero means that the value is unknown or not currently calculable.

max_frame_average_light_level: u32

Maximum Frame Average Light Level indicates the maximum value of the frame average light level (in cd/m^2, also known as nits) of the entire playback sequence. It is calculated by first averaging the decoded luminance values of all the pixels in each frame, and then using the value for the frame with the highest value.

The value is expressed in units of 0.0001 cd/m^2 - for example if this field is set to 10000000 then it indicates 1000 cd/m^2.

A value of zero means that the value is unknown or not currently calculable.

Trait Implementations

impl Clone for ContentLightLevelInfo

fn clone(&self) -> ContentLightLevelInfo

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ContentLightLevelInfo

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

Formats the value using the given formatter.

impl PartialEq for ContentLightLevelInfo

fn eq(&self, other: &ContentLightLevelInfo) -> 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 ContentLightLevelInfo

impl Eq for ContentLightLevelInfo

impl StructuralPartialEq for ContentLightLevelInfo