Module layout 

Layout constraint computation and pipeline planning for resize operations.

This module re-exports types from zenlayout. See that crate for full documentation.

Example

use zenresize::layout::{Constraint, ConstraintMode, Size};

let layout = Constraint::new(ConstraintMode::FitCrop, 400, 300)
    .compute(1000, 500)
    .unwrap();

// Source cropped to 4:3 aspect ratio, then resized to 400×300
assert_eq!(layout.resize_to, Size::new(400, 300));
assert!(layout.source_crop.is_some());

Modules

constraint

Layout constraint computation for resize operations.

orientation

Orientation (D4 dihedral group), EXIF mapping, and coordinate transforms.

plan

Command pipeline and decoder negotiation.

Structs

CodecLayout

Codec-ready geometry for a YCbCr image.

Constraint

Layout constraint specification.

DecoderOffer

What the decoder actually did.

DecoderRequest

What the layout engine wants the decoder to do.

IdealLayout

Result of the first phase of layout planning.

Layout

Computed layout from applying a Constraint to source dimensions.

LayoutPlan

Final layout plan after decoder negotiation.

OutputLimits

Post-computation safety limits applied after all layout computation.

Padding

Explicit padding specification.

Pipeline

Builder for image processing pipelines.

PlaneLayout

Geometry for a single image plane (luma or chroma).

Rect

Axis-aligned rectangle in pixel coordinates.

Region

A viewport rectangle in source coordinates defining a window into an infinite canvas.

RegionCoord

A coordinate in the region viewport, expressed as a percentage of the source dimension plus a pixel offset.

Size

Width × height dimensions in pixels.

Enums

Align

How to align output dimensions to codec-required multiples.

CanvasColor

Canvas background color for pad modes.

Command

A single image processing command.

ConstraintMode

How to fit a source image into target dimensions.

FlipAxis

Axis for manual flip commands.

Gravity

Where to position the image when cropping or padding.

LayoutError

Layout computation error.

Orientation

Image orientation as an element of the D4 dihedral group.

Rotation

Rotation amount for manual rotation commands.

SourceCrop

Region of source image to use before applying the constraint.

Subsampling

Chroma subsampling scheme.

Functions

compute_layout

Compute ideal layout from commands and source image dimensions.

compute_layout_sequential

Compute layout from command sequence with sequential evaluation.