- auto colour_conversion = glGetUniformLocation (program, "colour_conversion");
- check_gl_error ("glGetUniformLocation");
- glUniformMatrix4fv (colour_conversion, 1, GL_TRUE, gl_matrix);
+ {
+ auto conversion = dcp::ColourConversion::rec709_to_xyz();
+ boost::numeric::ublas::matrix<double> matrix = conversion.xyz_to_rgb ();
+ GLfloat gl_matrix[16];
+ ublas_to_gl(matrix, gl_matrix);
+
+ auto xyz_rec709_colour_conversion = glGetUniformLocation(program, "xyz_rec709_colour_conversion");
+ check_gl_error ("glGetUniformLocation");
+ glUniformMatrix4fv(xyz_rec709_colour_conversion, 1, GL_TRUE, gl_matrix);
+ }
+
+ {
+ auto xyz_rec709 = dcp::ColourConversion::rec709_to_xyz().xyz_to_rgb();
+ auto rec2020_xyz = dcp::ColourConversion::rec2020_to_xyz().rgb_to_xyz();
+ auto product = boost::numeric::ublas::prod(xyz_rec709, rec2020_xyz);
+
+ GLfloat gl_matrix[16];
+ ublas_to_gl(product, gl_matrix);
+
+ auto rec2020_rec709_colour_conversion = glGetUniformLocation(program, "rec2020_rec709_colour_conversion");
+ check_gl_error("glGetUniformLocation");
+ glUniformMatrix4fv(rec2020_rec709_colour_conversion, 1, GL_TRUE, gl_matrix);
+ }