Luke McCarthy ljmccarthy

## bash_strict_mode.md

      
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                mohanpedala
                / bash_strict_mode.md
            
            
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                set -e, -u, -o, -x pipefail explanation
              
          
    Table of Contents


set -e, -u, -x, -o pipefail
set -e
set -x
set -u
set -o pipefail
Setting IFS
Original Reference

set -e, -u, -x, -o pipefail


## repo-rinse.sh
git clean -xfd
git submodule foreach --recursive git clean -xfd
git reset --hard
git submodule foreach --recursive git reset --hard
git submodule update --init --recursive

## octal_x86.txt
# source:http://geocities.com/SiliconValley/heights/7052/opcode.txt
From: mark@omnifest.uwm.edu (Mark Hopkins)
Newsgroups: alt.lang.asm
Subject: A Summary of the 80486 Opcodes and Instructions

(1) The 80x86 is an Octal Machine
   This is a follow-up and revision of an article posted in alt.lang.asm on
7-5-92 concerning the 80x86 instruction encoding.

   The only proper way to understand 80x86 coding is to realize that ALL 80x86

## .readme.md

      
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                Minimal D3D11 sprite renderer
              
          
    Minimal D3D11 sprite renderer

Minimal D3D11 sprite renderer: basic back-to-front sprite rendering reference code with example sprite sheet animation logic. As usual: Complete, runnable single-function app. No modern C++ / OOP / obscuring cruft.

Swap out the sprite sheet with a font atlas for a lightweight GUI / text renderer. Clip individual sprites and glyphs by offsetting screenPos and atlasPos to top left corner of visible area and adjusting size accordingly (all values in pixels):
sprite.screenPos.x += 17;
sprite.screenPos.y += 10;

  
## gcc compiler optimization for arm systems.md

      
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                fm4dd
                / gcc compiler optimization for arm systems.md
            
            
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                GCC compiler optimization for ARM-based systems
              
          
    GCC compiler optimization for ARM-based systems

2017-03-03 fm4dd
The gcc compiler can optimize code by taking advantage of CPU specific features. Especially for ARM CPU's, this can have impact on application performance. ARM CPU's, even under the same architecture, could be implemented with different versions of floating point units (FPU). Utilizing full FPU potential improves performance of heavier operating systems such as full Linux distributions.
-mcpu, -march: Defining the CPU type and architecture

These flags can both be used to set the CPU type. Setting one or the other is sufficient.

  
## upgrade-debian-wsl.md

      
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                bramtechs
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                Upgrade Debian 9, (current WSL) to Debian 12 (bookworm testing)
              
          
    Upgrade Debian 9 (current WSL) to Debian 12 (bookworm testing)


Note: I do not maintain this gist anymore, but people report that it still works. Please check the comments for any revisions or extra things you should take into consideration.

As of writing, the Debian distro for WSL (Windows Subsystem for Linux) is quite old.
You can get more up-to-date package managers, text-editors and compilers by upgrading WSL to Debian 12 (current testing).


Root required
Use at your own risk, preferably on a fresh installation.


## FullScreenCanvas.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8">
    <title>Full-screen Canvas</title>
  </head>
  <body style="background:black">
    <canvas id="canvas" style="position:fixed;background:green;">
      Sorry, your browser does not appear to support HTML5 Canvas element.
    </canvas>

## tls_client.c
#define WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#include <windows.h>
#define SECURITY_WIN32
#include <security.h>
#include <schannel.h>
#include <shlwapi.h>
#include <assert.h>
#include <stdio.h>

## .readme.md

      
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                Minimal D3D11 pt3
              
          
    Minimal D3D11 pt3

An elaboration on Minimal D3D11 pt2, adding shadowmapping and incorporating various improvements and alternative approaches to the rendering setup, such as manual vertex fetching, samplerless texture lookup, null shader depth map rendering and procedurally generated texture and instance data.
As before, this is intended to be an an "API familiarizer" - an uncluttered Direct3D 11 setup & basic rendering reference implementation, in the form of a complete, runnable Windows application contained in a single function and laid out in a linear, step-by-step fashion. No modern C++ / OOP / obscuring cruft, only ~190 LOC. View on YouTube


## init.c
#define _XOPEN_SOURCE 700
#include <signal.h>
#include <unistd.h>

int main()
{
	sigset_t set;
	int status;

	if (getpid() != 1) return 1;
	git clean -xfd
	git submodule foreach --recursive git clean -xfd
	git reset --hard
	git submodule foreach --recursive git reset --hard
	git submodule update --init --recursive
	# source:http://geocities.com/SiliconValley/heights/7052/opcode.txt
	From: mark@omnifest.uwm.edu (Mark Hopkins)
	Newsgroups: alt.lang.asm
	Subject: A Summary of the 80486 Opcodes and Instructions

	(1) The 80x86 is an Octal Machine
	This is a follow-up and revision of an article posted in alt.lang.asm on
	7-5-92 concerning the 80x86 instruction encoding.

	The only proper way to understand 80x86 coding is to realize that ALL 80x86
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<title>Full-screen Canvas</title>
	</head>
	<body style="background:black">
	<canvas id="canvas" style="position:fixed;background:green;">
	Sorry, your browser does not appear to support HTML5 Canvas element.
	</canvas>
	#define WIN32_LEAN_AND_MEAN
	#include <winsock2.h>
	#include <windows.h>
	#define SECURITY_WIN32
	#include <security.h>
	#include <schannel.h>
	#include <shlwapi.h>
	#include <assert.h>
	#include <stdio.h>
	#define _XOPEN_SOURCE 700
	#include <signal.h>
	#include <unistd.h>

	int main()
	{
	sigset_t set;
	int status;

	if (getpid() != 1) return 1;