+ auto conversion = dcp::ColourConversion::rec709_to_xyz();
+ boost::numeric::ublas::matrix<double> matrix = conversion.xyz_to_rgb ();
+ GLfloat gl_matrix[] = {
+ static_cast<float>(matrix(0, 0)), static_cast<float>(matrix(0, 1)), static_cast<float>(matrix(0, 2)), 0.0f,
+ static_cast<float>(matrix(1, 0)), static_cast<float>(matrix(1, 1)), static_cast<float>(matrix(1, 2)), 0.0f,
+ static_cast<float>(matrix(2, 0)), static_cast<float>(matrix(2, 1)), static_cast<float>(matrix(2, 2)), 0.0f,
+ 0.0f, 0.0f, 0.0f, 1.0f
+ };
+
+ auto colour_conversion = glGetUniformLocation (program, "colour_conversion");
+ check_gl_error ("glGetUniformLocation");
+ glUniformMatrix4fv (colour_conversion, 1, GL_TRUE, gl_matrix);
+