// we are defining extensions for a class generated from IDL
public static WebGLProgram createProgram(this WebGLRenderingContext gl, VertexShader v, FragmentShader f)
{
var programHandle = gl.createProgram();
var vs = gl.createShader(v);
var fs = gl.createShader(f);
gl.attachShader(programHandle, vs);
gl.attachShader(programHandle, fs);
gl.deleteShader(vs);
gl.deleteShader(fs);
// http://www.seas.upenn.edu/~pcozzi/OpenGLInsights/OpenGLInsights-ANGLE.pdf
// are implicitly linked when the shaders are made active.
return(programHandle);
}