Charlie charliesbot

Viwoods AiPaper — Fast Ink API Guide

Overview

The Viwoods AiPaper uses a WritingSurface overlay composited by SurfaceFlinger to render pen strokes at ~81Hz on the e-ink display. Your app draws into an offscreen Bitmap, then pushes dirty rectangles to the overlay via renderWriting(). The e-ink controller receives these updates directly, bypassing the normal Android View rendering pipeline.

This works from any third-party app — no root, no system signing, no special permissions required.

Requirements

AGENTS.md

Persona

Address the user as Cam.
Optimize for correctness and long-term leverage, not agreement.
Be direct, critical, and constructive — say when an idea is suboptimal and propose better options.
When writing work summeries or replying to user questions be sure to explain things in a clear and easy to understand language, don't be over-technical unless user asks for it, give code examples to help explain what you're refering to and provide context.

Quality

Inspect project config (package.json, etc.) for available scripts.

Arch Linux installation notes

LUKS2 encrypted BTRFS system partition with Limine/Snapper integration and hybernate to swapfile

Install Android SDK on macOS

Install homebrew https://brew.sh/

brew cask install homebrew/cask-versions/adoptopenjdk8
brew cask install android-sdk

Operator Mono w/ Italics on OSX Vim

#Why Functional Programming Matters (to me)

This is my response to being asked not to use functional programming techniques.

###What I mean by "Functional Programming" Different people mean different things by "Functional Programming". Here's what it means to me:

Functions are first class, fundamental atoms of software, and proper functional programming languages allows passing functions as arguments, assigning them to variables, and composing them together to form new functions.
Strong Static Typing prevents many common programming errors automatically.
Null pointer dereferences can by virtually eliminated using Optional/Option/Maybe/Either data types to explicitly represent empty or error conditions.
Together with sum types, strongly typed languages can automatically perform local totality checking, informing the programmer when a logical branch is not handled.

The issue:

..mobile browsers will wait approximately 300ms from the time that you tap the button to fire the click event. The reason for this is that the browser is waiting to see if you are actually performing a double tap.

(from a new defunct https://developers.google.com/mobile/articles/fast_buttons article)

touch-action CSS property can be used to disable this behaviour.

touch-action: manipulation The user agent may consider touches that begin on the element only for the purposes of scrolling and continuous zooming. Any additional behaviors supported by auto are out of scope for this specification.

	#!/bin/bash
	# Set up a Raspberry Pi 4 as a USB-C Ethernet Gadget
	# Based on:
	# - https://www.hardill.me.uk/wordpress/2019/11/02/pi4-usb-c-gadget/
	# - https://pastebin.com/VtAusEmf

	if ! $(grep -q dtoverlay=dwc2 /boot/config.txt) ; then
	echo "Add the line dtoverlay=dwc2 to /boot/config.txt"
	exit
	fi

	import { ApolloServer, gql } from 'apollo-server-micro';

	const typeDefs = gql`
	type Query {
	sayHello: String
	}
	`;

	const resolvers = {
	Query: {

	// @flow

	import React, { Component } from 'react'
	import type { Node } from 'react'
	import { StyleSheet, Text, View } from 'react-native'

	import { default as Modal } from 'react-native-modal'
	import { styles } from './styles.js'

	// CONTAINER /////////////////////////////////////////////////////////////////////////////