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@mieki256
mieki256 / yliluoma_ordered_dither.py
Last active January 29, 2023 08:28
Yliluoma's ordered dithering algorithm 1, 2, 3. Python version.
#!python
# -*- mode: python; Encoding: utf-8; coding: utf-8 -*-
# Last updated: <2022/07/13 01:32:08 +0900>
"""
Yliluoma's ordered dithering algorithm 1, 2, 3 and adobe like
Arbitrary-palette positional dithering algorithm
https://bisqwit.iki.fi/story/howto/dither/jy/
Usage:
##[
Fixed point arithmetic
A fixed point number is an alternative representation for a real number.
IEEE floats, `f32` and `f64`, being the standard format in processors with
Floating Point Units (FPU). You should consider using fixed numbers on
systems where there's no FPU and performance is critical as fixed point
arithmetic is faster than software emulated IEEE float arithmetic. Do note
that fixed point numbers tend to be more prone to overflows as they operate
in ranges much smaller than floats.
@Brainiarc7
Brainiarc7 / ffmpeg-livestream-to-streaming-sites-vaapi-nvenc.md
Last active April 21, 2024 04:22
ffmpeg livestreaming to youtube via Nvidia's NVENC and Intel's VAAPI on supported hardware

Streaming your Linux desktop to Youtube and Twitch via Nvidia's NVENC and VAAPI:

Considerations to take when live streaming:

The following best practice observations apply when using a hardware-based encoder for live streaming to any platform:

  1. Set the buffer size (-bufsize:v) equal to the target bitrate (-b:v). You want to ensure that you're encoding in CBR mode.

  2. Set up the encoders as shown:

#!/bin/bash
# export DBUS_SESSION_BUS_ADDRESS environment variable because cron hates me
PID=$(pgrep -u USER gnome-session-b)
export DBUS_SESSION_BUS_ADDRESS=$(grep -z DBUS_SESSION_BUS_ADDRESS /proc/$PID/environ|cut -d= -f2-)
/usr/bin/gsettings set org.gnome.shell.extensions.user-theme name 'Flat-Plat'
/usr/bin/gsettings set org.gnome.desktop.interface gtk-theme 'Flat-Plat'
/usr/bin/gsettings set org.gnome.desktop.background picture-uri 'file://WALLPAPER-PATH'
/usr/bin/gsettings --schemadir ~/.local/share/gnome-shell/extensions/drop-down-terminal@gs-extensions.zzrough.org set org.zzrough.gs-extensions.drop-down-terminal background-color 'rgb(69,90,100)'
@undefinedbehavior
undefinedbehavior / rpi3_rust_led.rs
Last active January 17, 2017 06:47
Rust demo for Pi 3 bare metal
#![feature(asm)]
#![feature(lang_items)]
#![crate_type = "staticlib"]
#![no_std]
const GPIO_BASE: u32 = 0x3F200000; // base address for Pi 2 and Pi 3
fn sleep(value: u32){
for _ in 1..value {
unsafe { asm!("");}
@ianmetcalf
ianmetcalf / mithril-debounce.js
Last active February 4, 2016 19:54
Delay redraw for debounced events,based on https://www.npmjs.com/package/debounce
import m from 'mithril';
import now from 'date-now';
export default function debounce(func, wait = 100, immediate = false) {
let context, args, timestamp, timeout, result;
function debounced() {
context = this;
args = arguments;
timestamp = now();
@vittorioromeo
vittorioromeo / hello_triangle.cpp
Created October 10, 2015 11:07
SDL2 + OpenGL ES 2.0 - "Hello triangle" example that works both on X11 and Emscripten
#include <exception>
#include <functional>
#ifdef __EMSCRIPTEN__
#include <emscripten.h>
#include <SDL.h>
#include <SDL_image.h>
#include <SDL_ttf.h>
@ynsta
ynsta / blur.sh
Last active September 28, 2022 18:26
Blur konsole and yakuake instead of simple transparency
# add to zshrc
function blur-konsoles() {
windows=($(qdbus org.kde.konsole 2>/dev/null | egrep '^\/konsole\/MainWindow_[0-9]+$'))
for win in ${windows}; do
winId=$(qdbus org.kde.konsole $win winId 2>/dev/null)
[ ! -z "${winId}" ] && xprop -f _KDE_NET_WM_BLUR_BEHIND_REGION 32c -set _KDE_NET_WM_BLUR_BEHIND_REGION 0 -id "${winId}"
done
qdbus org.kde.yakuake &>/dev/null && xprop -f _KDE_NET_WM_BLUR_BEHIND_REGION 32c -set _KDE_NET_WM_BLUR_BEHIND_REGION 0 -name Yakuake
}
[ ! -z "$KONSOLE_DBUS_WINDOW" ] && blur-konsoles
@danielgtaylor
danielgtaylor / gist:0b60c2ed1f069f118562
Last active April 2, 2024 20:18
Moving to ES6 from CoffeeScript

Moving to ES6 from CoffeeScript

I fell in love with CoffeeScript a couple of years ago. Javascript has always seemed something of an interesting curiosity to me and I was happy to see the meteoric rise of Node.js, but coming from a background of Python I really preferred a cleaner syntax.

In any fast moving community it is inevitable that things will change, and so today we see a big shift toward ES6, the new version of Javascript. It incorporates a handful of the nicer features from CoffeeScript and is usable today through tools like Babel. Here are some of my thoughts and issues on moving away from CoffeeScript in favor of ES6.

While reading I suggest keeping open a tab to Babel's learning ES6 page. The examples there are great.

Punctuation

Holy punctuation, Batman! Say goodbye to your whitespace and hello to parenthesis, curly braces, and semicolons again. Even with the advanced ES6 syntax you'll find yourself writing a lot more punctuatio