cranpose-render-pixels 0.22.0

Software renderer for Cranpose scenes and RGBA framebuffers
Documentation 
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//! With little memory left, the room growth left past a raster scene's lists.
//! A screen keeps its scene, and a `Vec` that doubled to take one more item
//! keeps room for as many again, which the heap never gets back.

use cranpose_core::collections::growth_slack::GrowthSlack;

use crate::Picture;

// Gives back the room past the items of each list of `picture`'s scene and
// of the list of where each item reaches. Out of line: a frame with ample
// memory only tests the headroom it reads anyway.
#[inline(never)]
pub(crate) fn trim(picture: &mut Picture) {
    let Some(scene) = picture.raster.as_mut() else {
        return;
    };
    scene.shapes.trim_growth_slack();
    scene.images.trim_growth_slack();
    scene.texts.trim_growth_slack();
    scene.shadows.trim_growth_slack();
    scene.order.trim_growth_slack();
    scene.subtrees.trim_growth_slack();
    scene.passed_down.trim_growth_slack();
    picture.reach.trim_growth_slack();
}