v0.1.5

Summary

Runtime-agnostic async present APIs and optional Embassy integration for overlapping CPU render with DMA transfer.

crates.io: https://crates.io/crates/embedded-gui/0.1.5

Highlights

Async present stack (no executor required)

• CompletionSlot — ISR-safe DMA completion flag with waker support
• WaitTransfer / WaitTransferFuture — wire display DMA tokens to async wait
• SwapChain — present_async, present_region_async, wait_for_vsync_async, and non-blocking try_present
• DisplayBackend / AsyncDmaTransfer — backend trait extensions for async DMA
• GUI helpers — try_present_dirty, present_dirty_async, try_present_frame for dirty-region present

Optional Embassy feature

• Enable with embassy feature (pulls in embassy-time + embassy-sync)
• EmbassyWaitTransfer and FrameClock for Embassy-based frame loops
• Examples: completion_swapchain_sim, embassy_gui_frame

Other changes since 0.1.4

• Gate full widget catalog behind rich-widgets feature; keep essential widgets always on
• Sweeping-arc perf: skip trig at cardinal angles; cross-product sector test
• Context module refactor and expanded test coverage

Features

Feature	Default	Description
embassy	off	Embassy wakers + FrameClock
embassy-time	off	Time types for Embassy integration
triple-buffering	off	Triple-buffered swapchain APIs

Upgrade

embedded-gui = "0.1.5"

Rasterization stays synchronous; async is for present/wait/DMA overlap only — see README for RTIC/Embassy patterns.