app/src/androidTest/resources/Shaders/FragmentShaderRaster.glsl
// Fragment Shader: for the rasterized scene (preview feature)
// OpenGL ES 2.0 version
#version 100
// High precision is not necessary
precision lowp float;
// Interpolated variable from the vertex shader
varying vec4 fragmentColor;
// Main to calculate the color for each pixel in gl_FragColor
void main () {
// Output the color for this pixel
gl_FragColor = fragmentColor;
}