Module density 

Integral layout, the way Compose does it.

Cranpose’s layout is continuous: Constraints is four f32, a child is placed at an f32 offset, and nothing in cranpose-ui-layout rounds. Compose’s is integral — Dp.roundToPx() turns every padding, minimum size and spacing into an Int before anything is measured, and Placeable.placeAt takes an IntOffset.

That difference is not cosmetic. Half a pixel of drift moves a line of text’s antialiasing onto the next row, and it puts a soft edge everywhere the Compose build draws a crisp one. A widget that must draw a crisp edge therefore rounds its own sizes and offsets through Density rather than trusting the ambient float arithmetic. The Wear widgets do this throughout; the rest of the library does not, which is where a soft edge still comes from.

One length unit runs through all of it: a Cranpose layout point is a dp. Density converts to and from device pixels and does the rounding on the pixel side, which is the only side where rounding means anything.

Structs

Density

The device pixel grid a layout measures against: how many device pixels a layout point is worth, and how the platform converts a text size.

DensityMeasureScope

The production cranpose_ui_layout::MeasureScope: a grid captured at composition time, carried through measurement.

Functions

ProvideDensity

Runs content on density.

density

The device pixel grid in force here.

local_density

The CompositionLocal carrying the device pixel grid.