https://www.youtube.com/watch?v=kc1TuY8kIj0

##Dependencies: Imagemagick, bash, etc1tool from android sdk

##Command line tools:

1. png2etc1 converts PNG files to ETC1 format compressed (PKM) files
2. png2stitch will convert a large png (greater than 1024x1024px) to a set of tiles, to be passed into SpriteStitcher Cocos2dx class.
3. png2etc1_a converts PNG files to ETC1 format but with their alpha channel encoded into a seperate file.
4. png2stitch_a will convert a large png into tiles, but each tile has its own alpha map

##Command line tool usage:

1. png2etc1 file1.png file2.png file3.png ... outputs a .pkm for every infile
2. png2etc1_a file1.png file2.png file3.png ... outputs a .pkm & _alpha.pkm for every infile
3. png2stitch image_name.png outputs folder image_name, containing a number of .pkm tiles <= 1024x1024 depending on image size
4. png2stitch_a image_name.png same as png_stitch but each tile also comes with an alpha map

##Download Cocos2d-x project files:

1. shaders/ folder, place this in your Cocos2d-x project's Resources/ directory
2. SpriteStitch.cpp and SpriteStitch.h, use this class inside your Cocos2d-x project to obtain a SpriteStitch node
3. To add a class this class into your Windows or Linux build, edit CMakeLists.txt at the root of your project directory to add the files, then run cmake -G "Unix Makefiles" (or appropriate generator-name) in your proj.linux/ or proj.win32/ folder

##SpriteStitch class usage:

1. Initialize a SpriteStitch object from the output of png2stitch: node = SpriteStitch::createFromFolder("level1", true); First argument is the folder outputted from png2stitch, second argument is if it has an alpha mask, true/false

2. Create ETC1 compressed sprite with alpha: sprite = SpriteStitch::createETCASprite("Sprite.pkm", "Sprite_alpha.pkm"); First argument is the sprite's pkm image file, the second is the sprite's alpha mask (created with png2etc_a)