returning opengl display callback in D
- by Max
I've written a simple hello world opengl program in D, using the converted gl headers here.
My code so far:
import std.string;
import c.gl.glut;
Display_callback display()
{
return Display_callback // line 7
{
return; // just display a blank window
};
} // line 10
void main(string[] args)
{
glutInit(args.length, args);
glutInitDisplayMode(GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE);
glutInitWindowSize(800,600);
glutCreateWindow("Hello World");
glutDisplayFunc(display);
glutMainLoop();
}
My problem is with the display() function. glutDisplayFunc() expects a function that returns a Display_callback, which is typedef'd as typedef GLvoid function() Display_callback;. When I try to compile, dmd says
line 7: found '{' when expecting ';' following return statement
line 10: unrecognized declaration
How do I properly return the Display_callback here? Also, how do I change D strings and string literals into char*? My calls to glutInit and glutCreateWindow don't like the D strings they're getting. Thanks for your help.
