README.md

pishadertoy

by dff180

Simple console tool to test OpenGL ES 2.0 fragment shaders on the Raspberry Pi.

Fragment shader and optional texture are specified on command-line.

Sample video: https://www.youtube.com/watch?v=F0mfntGDmxg

Credits

• EGL class code by Jon Macey

• Sample shaders from ShaderToy by Inigo 'iq' Quilez. Explore the ShaderToy website for additional shader and texture usage examples.

• Sample textures from http://elout.home.xs4all.nl/texl/tex/index.html

Installation

Note: The following instructions are for Raspbian Wheezy Raspberry Pi installs (2013-05-25-wheezy-raspbian). They assume that you already have set up a working development environment where you can compile the hello_pi examples.

1. Get sources with git clone https://github.com/dff180/pishadertoy.git
2. Install dependencies with sudo apt-get install libsoil-dev
3. cd pishadertoy
4. make

Running

• Make sure to use latest firmware and 192/64 memory split

  • sudo rpi-update 192

• Start from Raspberry Pi console or via SSH client

• Exit program with CTRL-C

Examples

• Using default fragment shader

  ./pishadertoy

• Using fragment shader which doesn't need texture

  ./pishadertoy shaders/flower.f.glsl

• Using fragment shader with texture

  ./pishadertoy shaders/relieftunnel.f.glsl textures/texl2.jpg