The rain was 40 live text labels; moving a label re-rasterizes its katakana glyphs every frame, reading the font from PSRAM and blending against the framebuffer. That per-frame load starved the DSI's framebuffer read and flashed the panel blue while a voice reply downloaded (confirmed: with the rain removed the flash vanished). Pre-render a small pool of streak sprites once into internal RAM and blit them; movement is now a cheap opaque copy that never touches the PSRAM bus. Also drain the rain during audio (listening/speaking) rather than freezing it. This clears the last of the load flicker while keeping the dense look. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LKPbR6DY2JygHbyLjxm7Uu
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Changelog
All notable, user-facing changes to DeskLock are documented in this file.
The format is based on Keep a Changelog. DeskLock is pre-release and unversioned; entries accumulate under Unreleased until the first tagged release.
[Unreleased]
Fixed
- Fixed the blue-screen flicker during voice activity — the matrix rain now renders as cheap pre-rendered sprites, and the DSI clocks/FIFO are tuned, so the display's memory reads are no longer starved by Wi-Fi and audio DMA.
Changed
- Matrix rain is drawn from a reused pool of pre-rendered streak sprites instead of live text labels, and eases off while the device is listening or speaking.