Hello. I’m a freelance agile software developer. I develop intuitive Android applications, and build rock-solid Linux infrastructures. Read about my professional experience here.
Welcome to my Blog - { Jude Pereira }
Uncyclopedia App for Android – On GitHub
I’ve decided to open source the Uncyclopedia app for Android, which some of you may remember was available on the Play store during the first quarter this year. Browse the code on GitHub. The source code is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License.
Calculate the REAL scale factor and the angle of rotation from an Android Matrix
After performing transformations such as rotation of a bitmap about an arbitrary point, the scale is lost. Of course, this makes sense because the bitmap is rotated inside the same bounds. To get the real scale now, along with the most reliable degree of rotation, I had to follow this method. Hope it saves the…
Multi Touch in Android – Translate, Scale, and Rotate
Here’s a quick and easy implementation of Android’s multi touch feature – one finger to move, two to zoom, and three to rotate the image. Assuming you have a basic understanding of 2D matrix transformations, the Matrix class in Android uses a 3×3 matrix to achieve all of the 2D transformations. The source code and…
Notes on running the Crippled Turbo C/C++ from Dosbox, within a Linux Env
Notes on setting up Turbo C/C++ within DosBox 0.74, compiled from source: Install DosBox from source This is the dosbox_shared directory containing Turbo C/C++ This config file is tested and works, modify the last three commands, to set the correct path to where you’ve extracted the dosbox_shared.tar.bz2 Place the config file in /home/username/.dosbox/dosbox-0.74.conf
Rooted? Get the most of your Android phone | A power saving strategy
The smart-phones these days are power hungry devices, and often drain the battery within six to eight hours, or even less. However, if it’s running Android, there’s a good chance that that can change. The key is to find the right set of tools, and optimize your phone to be right on the edge, there…
The Unofficial Gentoo Linux x86 uClibC stage3s’
Following this Gentoo bug: https://bugs.gentoo.org/show_bug.cgi?id=441976 We have official experimental uClibC for x86 and amd64 stages. I will not be maintaining these unofficial ones any longer. The link to the official archives is: http://mirrors.rit.edu/gentoo/experimental/x86/uclibc/ and http://mirrors.rit.edu/gentoo/experimental/amd64/uclibc/ The uclibc experimental stages on the gentoo mirrors are all outdated(they go back to years), so here are my stage3s’,…
Use Ruby to Generate your Shadow Password
I was initially stumbled on creating the shadow compatible SHA-512 hash. After a little research, the answer was obvious: require ‘digest/sha2′ password = “pass@123″ salt = rand(36**8).to_s(36) shadow_hash = password.crypt(“$6$” + salt) And you now have a password hash which you can directly use in /etc/shadow
The Puppet Cyclic Dependency Nightmare
Want to see the wildest cyclic dependency graph ever? Well, here it is: After this was fixed finally, after a lot of frustration, the result was majestic:
Hacking your GoFlex Home, #3 Ideas
Well, first off the ability to just add one USB device is a little boring, I’ve been using a Belkin 4 port USB HUB, and the results are good. For cooling the GoFlex, you may want to remove the bottom cover and keep it on a laptop cooling fan or something similar, as the processor…
Hacking your GoFlex Home, #2 UART Serial Console
Serial console? That’s beautiful when it comes to debugging. The following images are specific to the Seagate GoFlex Home, however, you may be able to figure out the connections for other Marvell SoCs. On the board: Notice that according to the picture, the bottom right last three pins are used. The junction: I’ve used extra…
Hacking your GoFlex Home, #1 Build your KERNEL
It’s been quite sometime that I’ve got my GoFlex Home now, and it’s only recently that I’ve received my RS232 Serial USB UART Adapter. The pin connections are simple and easy, I’ll post that as well. As I’ve already got Gentoo Linux running on the Marvell SoC, I was still using the Archlinux ARM kernel,…
recursive get from an FTP server
As we all know, downloading a directory from an FTP server over FTP over the command line is not possible. Some, have found mget to be the holy grail, I certainly do not. I was restoring my music backup from my NAS, and I didn’t want to do it the GUI way, so CLI is…