Struct PreviewSession 

pub struct PreviewSession { /* private fields */ }

A photograph held on the bench, ready to be printed at any setting.

Implementations

impl PreviewSession

pub fn open(request: PreviewRequest) -> Result<Self, Error>

Read the photograph and meter it, once.

The width is the bench’s: the model’s grain and blur belong to the sampling, so a session is opened at the size it will be looked at, just as a print is rendered at the size it will be exported.

pub fn frame( &self, minutes: f64, print_ev: f64, balance_from: Option<f64>, filters: &str, heat_glass: Option<&str>, ) -> Result<PreviewFrame, Error>

The frame this session would print at one setting.

balance_from is the strip’s one exposure: when set, the enlarger is borrowed from that development and only the negative is this frame’s.

Trait Implementations

impl Debug for PreviewSession

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

Formats the value using the given formatter.