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@yohhoy
yohhoy / yuvrgb.md
Last active March 29, 2024 00:19
RGB <=> YCbCr(YPbPr) color space conversion 
Y  = a * R + b * G + c * B
Cb = (B - Y) / d
Cr = (R - Y) / e
BT.601 BT.709 BT.2020
a 0.299 0.2126 0.2627
b 0.587 0.7152 0.6780
@panzi
panzi / portable_endian.h
Last active April 18, 2024 20:59
This provides the endian conversion functions form endian.h on Windows, Linux, *BSD, Mac OS X, and QNX. You still need to use -std=gnu99 instead of -std=c99 for gcc. The functions might actually be macros. Functions: htobe16, htole16, be16toh, le16toh, htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh. License: I hereby put …
// "License": Public Domain
// I, Mathias Panzenböck, place this file hereby into the public domain. Use it at your own risk for whatever you like.
// In case there are jurisdictions that don't support putting things in the public domain you can also consider it to
// be "dual licensed" under the BSD, MIT and Apache licenses, if you want to. This code is trivial anyway. Consider it
// an example on how to get the endian conversion functions on different platforms.
#ifndef PORTABLE_ENDIAN_H__
#define PORTABLE_ENDIAN_H__
#if (defined(_WIN16) || defined(_WIN32) || defined(_WIN64)) && !defined(__WINDOWS__)
@timo
timo / urxvt_panel.sh
Last active December 26, 2017 02:01
how to put an urxvt at the bottom of the screen to behave just like a panel.
#!/usr/bin/env zsh
killall -SIGSTOP i3
urxvt -geometry 100x2 -name "flub" -e tmux -L CNTR&
sleep 1
ID=0x`xwininfo -root -tree | grep "flub" | sed -e 's/.*0x//' -e 's/ .*//'`
SCRNWDT=`xrandr | grep \* | sed -e 's/x.*//' -e 's/^ *//'`
xprop -id $ID -f _NET_WM_STRUT_PARTIAL 32cccccccccccc -set _NET_WM_STRUT_PARTIAL "0, 0, 0, 42, 0, 0, 0, 0, 0, 0, 0, $SCRNWDT"
xprop -id $ID -f _NET_WM_WINDOW_TYPE 32a -set _NET_WM_WINDOW_TYPE _NET_WM_WINDOW_TYPE_DOCK
tmux -L CNTR send-keys 'countup-bin $COLUMNS 5' "Enter"
tmux -L CNTR set-option -g status off