1 files changed, 57 insertions, 0 deletions
diff --git a/src/Fl_Gl_Choice.H b/src/Fl_Gl_Choice.H
new file mode 100644
index 000000000..c112559a9
--- /dev/null
+++ b/src/Fl_Gl_Choice.H
@@ -0,0 +1,57 @@
+// Internal interface to set up OpenGL.
+
+// A "Fl_Gl_Choice" is used to cache results of calling the
+// OpenGL code for system-specific information needed to
+// implement a "mode".
+// For X this is a visual, and this must be called *before*
+// the X window is created.
+// For win32 this can be delayed to a more convienent time,
+// as it only returns information for modifying a device
+// context.
+// This is used by Fl_Gl_Window, gl_start(), and gl_visual()
+
+#ifndef Fl_Gl_Choice_H
+#define Fl_Gl_Choice_H
+
+#ifdef WIN32
+# include <windows.h>
+# include <FL/gl.h>
+# define GLXContext HGLRC
+# define GLX_BUFFER_SIZE      1
+# define GLX_RGBA	      2
+# define GLX_GREEN_SIZE	      3
+# define GLX_ALPHA_SIZE	      4
+# define GLX_ACCUM_GREEN_SIZE 5
+# define GLX_ACCUM_ALPHA_SIZE 6
+# define GLX_DOUBLEBUFFER     7
+# define GLX_DEPTH_SIZE	      8
+# define GLX_STENCIL_SIZE     9
+#else
+# include <GL/glx.h>
+#endif
+
+// one of these structures is returned:
+class Fl_Gl_Choice {
+  int mode;
+  const int *alist;
+  Fl_Gl_Choice *next;
+public:
+#ifdef WIN32
+  PIXELFORMATDESCRIPTOR pfd;
+#else
+  XVisualInfo *vis;	// the visual to use
+  Colormap colormap;	// a colormap to use
+#endif
+  uchar r,d,o;		// rgb mode, double buffered, overlay flags
+  // either use mode flags from gl_draw.H or a literal glX int list.
+  // one of the two arguments must be zero!
+  static Fl_Gl_Choice *find(int mode, const int *);
+};
+
+#ifdef WIN32
+// function to create and init the dc needed to draw OpenGL:
+class Fl_Window;
+HDC fl_private_dc(Fl_Window*, int, Fl_Gl_Choice **gp);
+#endif
+
+#endif