getShaderParameter method
Implementation
bool getShaderParameter(WebGLShader shader, int pname){
startCheck('getShaderParameter');
var _pointer = calloc<Int32>();
gl.glGetShaderiv(shader.id, pname, _pointer);
checkError('getShaderParameter');
final _v = _pointer.value;
calloc.free(_pointer);
return _v == 0?false:true;
}