Andy Thomson andy-thomason

## make_arrow_tests.py
import numpy as np
import pyarrow as pa
import pyarrow.feather as pf
import pandas as pd

dtypes = ['i1', 'i2', 'i4', 'i8', 'u1', 'u2', 'u4', 'u8', 'f4', 'f8']
strings = ['a', 'bc', 'de', 'efgh', 'five']

cols = {d: np.ones(dtype=d, shape=(20)) for d in dtypes}

## Genomics_A_Programmers_Guide.md

      
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                andy-thomason
                / Genomics_A_Programmers_Guide.md
            
            
              Created May 14, 2019
            
              
                Genomics a programmers introduction
              
          
      View Genomics_A_Programmers_Guide.md
  
      
    Genomics - A programmer's guide.
Andy Thomason is a Senior Programmer at Genomics PLC.
He has been witing graphics systems, games and compilers since
the '70s and specialises in code performance.
https://www.genomicsplc.com


## exif.cpp
//////////////////////////////////////////////////////////////////////////////////////////
//
// Example Exif thumbnail extractor.
//

#include <iostream>
#include <fstream>
#include <vector>


## inverting_stb_image.cpp
////////////////////////////////////////////////////////////////////////////////
//
// Example of converting stb_image to a libjpeg-style background process.
// This enables you to stream JPEG files from the internet and interleave
// decoding time without frameout on the main thread.
//
// The example uses three parts of the C++11 threads API.
// 1) std::async   This is used to run the loader in its own thread.
// 2) std::mutex   This is used to protect the members of the class from race
//                 conditions.

## sdl_hello_triangle.cpp

#define GL_GLEXT_PROTOTYPES 1
#include <SDL2/SDL.h>
#include <SDL2/SDL_opengles2.h>

int main() {
  auto window = SDL_CreateWindow(
    "triangle", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
    512, 512, SDL_WINDOW_OPENGL | SDL_WINDOW_SHOWN
  );

## exif_example.cpp
#include <stdio.h>
#include <libexif/exif-loader.h>

// Note: no error handling and no cleanup for clarity.
int main()
{
  ExifLoader *loader = exif_loader_new();
  exif_loader_write_file(loader, "IMG_20170422_132409.jpg");
  ExifData *ed = exif_loader_get_data(loader);
  ed = exif_loader_get_data(loader);

## python_vr_triangle.py
import time
import sdl2
import openvr
import numpy

from OpenGL.GL import *
from OpenGL.GL.shaders import compileShader, compileProgram
from openvr.glframework import shader_string
from sdl2 import *

## webgl.html
<html>
  <head>
    <script>
      function main() {
        var canvas = document.getElementById("myGLCanvas");
        try {
          gl = canvas.getContext("webgl");
        } catch(e) {
          console.log(e);
        }
	import numpy as np
	import pyarrow as pa
	import pyarrow.feather as pf
	import pandas as pd

	dtypes = ['i1', 'i2', 'i4', 'i8', 'u1', 'u2', 'u4', 'u8', 'f4', 'f8']
	strings = ['a', 'bc', 'de', 'efgh', 'five']

	cols = {d: np.ones(dtype=d, shape=(20)) for d in dtypes}
	//////////////////////////////////////////////////////////////////////////////////////////
	//
	// Example Exif thumbnail extractor.
	//

	#include <iostream>
	#include <fstream>
	#include <vector>
	////////////////////////////////////////////////////////////////////////////////
	//
	// Example of converting stb_image to a libjpeg-style background process.
	// This enables you to stream JPEG files from the internet and interleave
	// decoding time without frameout on the main thread.
	//
	// The example uses three parts of the C++11 threads API.
	// 1) std::async This is used to run the loader in its own thread.
	// 2) std::mutex This is used to protect the members of the class from race
	// conditions.

	#define GL_GLEXT_PROTOTYPES 1
	#include <SDL2/SDL.h>
	#include <SDL2/SDL_opengles2.h>

	int main() {
	auto window = SDL_CreateWindow(
	"triangle", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
	512, 512, SDL_WINDOW_OPENGL \| SDL_WINDOW_SHOWN
	);
	#include <stdio.h>
	#include <libexif/exif-loader.h>

	// Note: no error handling and no cleanup for clarity.
	int main()
	{
	ExifLoader *loader = exif_loader_new();
	exif_loader_write_file(loader, "IMG_20170422_132409.jpg");
	ExifData *ed = exif_loader_get_data(loader);
	ed = exif_loader_get_data(loader);
	import time
	import sdl2
	import openvr
	import numpy

	from OpenGL.GL import *
	from OpenGL.GL.shaders import compileShader, compileProgram
	from openvr.glframework import shader_string
	from sdl2 import *
	<html>
	<head>
	<script>
	function main() {
	var canvas = document.getElementById("myGLCanvas");
	try {
	gl = canvas.getContext("webgl");
	} catch(e) {
	console.log(e);
	}