minimum-necessary-change

//convert RGB565 to RGB888

byte src[] = loadBytes("ui.bin");
byte dst[] = new byte[src.length/2*3];

for (int i=0, j=0; i<src.length; i+=2) {
  int c = src[i] + (src[i+1]<<8);
  byte r = byte(((c & 0xF800) >> 11) << 3);
  byte g = byte(((c & 0x7E0) >> 5) << 2);
  byte b = byte(((c & 0x1F)) << 3);

minimum-necessary-change

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.

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/* 

Example of Skip List source code for C:

Skip Lists are a probabilistic alternative to balanced trees, as
described in the June 1990 issue of CACM and were invented by 
William Pugh in 1987. 

This file contains source code to implement a dictionary using 
skip lists and a test driver to test the routines.

minimum-necessary-change

Setup LibreOffice Online (Log/Guide) [WIP]

About

This guide/log is based off my experience attempting to build and install LibreOffice Online and it's dependencies on my system.

The end goal is to get LibreOffice Online integrated with Karoshi Server.

LibreOffice Online is still in development (17/06/16).

minimum-necessary-change

#include <iostream>
#include <fstream>
#include <vector>
#include <cstdint>
#include <memory>

#include <jpeglib.h>

using namespace std;