add recent minilibx linux as submodule

libs/minilibx_opengl_20191021/mlx_opengl.m

@@ -0,0 +1,57 @@
+// mlx_opengl.m
+
+#import <Cocoa/Cocoa.h>
+#import <OpenGL/gl3.h>
+#import <AppKit/NSOpenGLView.h>
+
+#include <stdio.h>
+
+#include "mlx_int.h"
+#include "mlx_new_window.h"
+
+
+
+
+
+NSOpenGLPixelFormatAttribute pfa_attrs_opengl[] =
+  {
+    NSOpenGLPFADepthSize, 32,
+    NSOpenGLPFADoubleBuffer,
+    NSOpenGLPFAOpenGLProfile, NSOpenGLProfileVersion4_1Core,
+    0
+  };
+
+
+
+void	*mlx_new_opengl_window(mlx_ptr_t *mlx_ptr, int size_x, int size_y, char *title)
+{
+  mlx_win_list_t	*newwin;
+  NSString		*str;
+
+  if ((newwin = malloc(sizeof(*newwin))) == NULL)
+    return ((void *)0);
+  newwin->img_list = NULL;
+  newwin->next = mlx_ptr->win_list;
+  newwin->nb_flush = 0;
+  newwin->pixmgt = 0;
+  mlx_ptr->win_list = newwin;
+
+  NSRect windowRect = NSMakeRect(100, 100, size_x, size_y);
+  str = [NSString stringWithCString:title encoding:NSASCIIStringEncoding];
+  newwin->winid = [[MlxWin alloc] initWithRect:windowRect andTitle:str pfaAttrs:pfa_attrs_opengl];
+
+  return ((void *)newwin);
+}
+
+
+int	mlx_opengl_swap_buffers(mlx_win_list_t *win_ptr)
+{
+  [(id)(win_ptr->winid) flushGLContext];
+  return (0);
+}
+
+int	mlx_opengl_window_set_context(mlx_win_list_t *win_ptr)
+{
+  [(id)(win_ptr->winid) selectGLContext];
+  return (0);
+}