Crate cranpose_render_pixels 

Cranpose Pixels Renderer

cranpose-render-pixels draws Cranpose scenes into a caller-owned RGBA byte buffer. Renderer and host authors use PixelsRenderer when a software frame fits the target surface. App authors can select the renderer-pixels feature on cranpose.

PixelsRenderer::draw_scaled writes the current scene into a host-owned RGBA buffer at the requested device scale:

use cranpose_render_pixels::PixelsRenderer;

let renderer = PixelsRenderer::new();
let mut rgba = vec![0; 64 * 64 * 4];
renderer.draw_scaled(&mut rgba, 64, 64, 2.0);

AppShell supplies the scene before each frame. The host presents the image. The watchOS host shows the complete integration.

Default features are empty. The optional embedded-default-font feature supplies a fallback font. The renderer-pixels feature selects this backend through cranpose; the watchos feature selects the same backend.

See the PixelsRenderer API, the renderer architecture guide and the crate source.

Modules

scene

The retained scene and hit regions of the pixel renderer.

sprites

The scene as sprites for a GPU compositor other than wgpu: SpriteKit on watchOS, which gives an app no Metal of its own.

Structs

HitRegion

A hit target in window space: the node’s geometry, clips and pointer handlers.

Picture

The picture a host drew last. PixelsRenderer::update_picture moves it to the current scene and finds the pixels that change, and PixelsRenderer::draw_picture_area draws any part of it.

PixelRect

A rectangle of device pixels: columns x..x + width of rows y..y + height.

PixelsRenderer

A renderer that draws the scene into a caller-owned RGBA pixel buffer on the CPU.

Scene

The retained render graph of a window together with the hit targets built from it.

Functions

draw_scene

Draws scene into frame, an RGBA8 buffer of width by height pixels, at one device pixel per logical pixel and with the default font resources.