1 files changed, 214 insertions, 0 deletions
diff --git a/src/Fl_Gl_Window_Driver.H b/src/Fl_Gl_Window_Driver.H
new file mode 100644
index 000000000..88d2c14dc
--- /dev/null
+++ b/src/Fl_Gl_Window_Driver.H
@@ -0,0 +1,214 @@
+//
+// "$Id$"
+//
+// Definition of class Fl_Gl_Window_Driver, and of its platform-specific derived classes
+// for the Fast Light Tool Kit (FLTK).
+//
+// Copyright 2016-2018 by Bill Spitzak and others.
+//
+// This library is free software. Distribution and use rights are outlined in
+// the file "COPYING" which should have been included with this file.  If this
+// file is missing or damaged, see the license at:
+//
+//     http://www.fltk.org/COPYING.php
+//
+// Please report all bugs and problems on the following page:
+//
+//     http://www.fltk.org/str.php
+//
+
+/**
+ \cond DriverDev
+ \addtogroup DriverDeveloper
+ \{
+ */
+
+#ifndef Fl_Gl_Window_Driver_H
+#define Fl_Gl_Window_Driver_H
+
+#include <FL/Fl_Gl_Window.H>
+
+class Fl_Gl_Choice;
+class Fl_Font_Descriptor;
+
+/* The constructor of each Fl_Gl_Window object creates also an object from a
+ platform-specific derived class from this class.
+ */
+class Fl_Gl_Window_Driver {
+protected:
+  Fl_Gl_Window *pWindow;
+public:
+  Fl_Gl_Choice* g() {return pWindow->g;}
+  void g(Fl_Gl_Choice *c) {pWindow->g = c;}
+  int mode() {return pWindow->mode_;}
+  void mode(int m) { pWindow->mode_ = m;}
+  const int *alist() {return pWindow->alist;}
+  void alist(const int *l) { pWindow->alist = l;}
+  void* overlay() {return pWindow->overlay;}
+  void draw_overlay() {pWindow->draw_overlay();}
+
+  Fl_Gl_Window_Driver(Fl_Gl_Window *win) : pWindow(win) {}
+  virtual ~Fl_Gl_Window_Driver() {}
+  static Fl_Gl_Window_Driver *newGlWindowDriver(Fl_Gl_Window *w);
+  static Fl_Gl_Window_Driver *global();
+  virtual float pixels_per_unit() {return 1;}
+  virtual void before_show(int& need_redraw) {}
+  virtual void after_show(int need_redraw) {}
+  virtual void invalidate();
+  virtual int mode_(int m, const int *a) {return 0;}
+  virtual void make_current_before() {}
+  virtual void make_current_after() {}
+  virtual void swap_buffers() {}
+  virtual void resize(int is_a_resize, int w, int h) {}
+  virtual char swap_type();
+  virtual int flush_begin(char& valid_f) {return 0;}
+  virtual void hide_overlay(void *& overlay) {}
+  static Fl_Gl_Choice *find_begin(int m, const int *alistp);
+  // Return one of these structures for a given gl mode.
+  // The second argument is a glX attribute list, and is used if mode is zero.
+  // This is not supported on Win32:
+  virtual Fl_Gl_Choice *find(int mode, const int *alistp) {return NULL;}
+  virtual GLContext create_gl_context(Fl_Window* window, const Fl_Gl_Choice* g, int layer = 0) {return 0;}
+  virtual void set_gl_context(Fl_Window* w, GLContext context) {}
+  virtual void delete_gl_context(GLContext) {}
+  virtual void make_overlay(void* &o);
+  virtual void hide_overlay() {}
+  virtual void make_overlay_current() {}
+  virtual void redraw_overlay() {}
+  virtual int can_do_overlay() {return 0;}
+  virtual void waitGL() {} // support for gl_finish() function
+  virtual void gl_visual(Fl_Gl_Choice*); // support for Fl::gl_visual() function
+  virtual void gl_start() {} // support for gl_start() function
+  virtual void* GetProcAddress(const char *procName); // support for glutGetProcAddress()
+  virtual void draw_string_legacy(const char* str, int n); // support for gl_draw()
+  void draw_string_legacy_get_list(const char* str, int n); // support for gl_draw()
+  static void draw_string_legacy_glut(const char* str, int n); // support for gl_draw()
+  virtual void get_list(Fl_Font_Descriptor* fd, int r) {} // support for gl_draw() without textures
+  virtual void gl_bitmap_font(Fl_Font_Descriptor *fl_fontsize) {} // support for gl_font() without textures
+  virtual int overlay_color(Fl_Color i) {return 0;} // support for gl_color() with HAVE_GL_OVERLAY
+  static void draw_string_with_texture(const char* str, int n); // cross-platform
+  // support for gl_draw(). The cross-platform version may be enough.
+  virtual char *alpha_mask_for_string(const char *str, int n, int w, int h);
+  virtual int genlistsize() { return 0; } // support for gl_draw()
+  virtual Fl_Font_Descriptor** fontnum_to_fontdescriptor(int fnum);
+};
+
+#ifdef FL_CFG_GFX_QUARTZ
+#ifdef __OBJC__
+@class NSOpenGLPixelFormat;
+#else
+class NSOpenGLPixelFormat;
+#endif // __OBJC__
+
+class Fl_Cocoa_Gl_Window_Driver : public Fl_Gl_Window_Driver {
+  friend class Fl_Gl_Window_Driver;
+  friend class Fl_OpenGL_Display_Device;
+  Fl_Cocoa_Gl_Window_Driver(Fl_Gl_Window *win) : Fl_Gl_Window_Driver(win) {}
+  virtual float pixels_per_unit();
+  virtual void before_show(int& need_redraw);
+  virtual void after_show(int need_redraw);
+  virtual int mode_(int m, const int *a);
+  virtual void make_current_before();
+  virtual void swap_buffers();
+  virtual void resize(int is_a_resize, int w, int h);
+  virtual char swap_type();
+  void flush_context();
+  virtual Fl_Gl_Choice *find(int m, const int *alistp);
+  virtual GLContext create_gl_context(Fl_Window* window, const Fl_Gl_Choice* g, int layer = 0);
+  virtual void set_gl_context(Fl_Window* w, GLContext context);
+  virtual void delete_gl_context(GLContext);
+  virtual void make_overlay_current();
+  virtual void redraw_overlay();
+  virtual void gl_start();
+  static NSOpenGLContext* create_GLcontext_for_window(NSOpenGLPixelFormat *pixelformat, NSOpenGLContext *shared_ctx, Fl_Window *window);
+  static NSOpenGLPixelFormat *mode_to_NSOpenGLPixelFormat(int mode, const int*); // uses Objective-c
+  static void GLcontext_update(NSOpenGLContext*); // uses Objective-c
+  static void GLcontext_release(NSOpenGLContext*); // uses Objective-c
+  static void GLcontext_makecurrent(NSOpenGLContext*); // uses Objective-c
+  static void GL_cleardrawable(void); // uses Objective-c
+  virtual char *alpha_mask_for_string(const char *str, int n, int w, int h);
+};
+#endif // FL_CFG_GFX_QUARTZ
+
+
+#ifdef FL_CFG_GFX_GDI
+
+class Fl_WinAPI_Gl_Window_Driver : public Fl_Gl_Window_Driver {
+  friend class Fl_Gl_Window_Driver;
+  Fl_WinAPI_Gl_Window_Driver(Fl_Gl_Window *win) : Fl_Gl_Window_Driver(win) {}
+  virtual float pixels_per_unit();
+  virtual int mode_(int m, const int *a);
+  virtual void make_current_after();
+  virtual void swap_buffers();
+  virtual void invalidate() {}
+  virtual int flush_begin(char& valid_f);
+  virtual void hide_overlay(void *& overlay);
+  virtual Fl_Gl_Choice *find(int m, const int *alistp);
+  virtual GLContext create_gl_context(Fl_Window* window, const Fl_Gl_Choice* g, int layer = 0);
+  virtual void set_gl_context(Fl_Window* w, GLContext context);
+  virtual void delete_gl_context(GLContext);
+  virtual void make_overlay_current();
+  virtual void redraw_overlay();
+  virtual void* GetProcAddress(const char *procName);
+  virtual void draw_string_legacy(const char* str, int n);
+  virtual void gl_bitmap_font(Fl_Font_Descriptor *fl_fontsize);
+  virtual void get_list(Fl_Font_Descriptor *fd, int r);
+  virtual int genlistsize();
+#if HAVE_GL_OVERLAY
+  virtual int can_do_overlay();
+  virtual int overlay_color(Fl_Color i);
+#endif
+};
+
+#endif // FL_CFG_GFX_GDI
+
+
+#ifdef FL_CFG_GFX_XLIB
+#include <X11/Xutil.h> // for XVisualInfo
+class Fl_X11_Gl_Window_Driver : public Fl_Gl_Window_Driver {
+  friend class Fl_Gl_Window_Driver;
+  Fl_X11_Gl_Window_Driver(Fl_Gl_Window *win) : Fl_Gl_Window_Driver(win) {}
+  virtual float pixels_per_unit();
+  virtual void before_show(int& need_redraw);
+  virtual int mode_(int m, const int *a);
+  virtual void swap_buffers();
+  virtual void resize(int is_a_resize, int w, int h);
+  virtual char swap_type();
+  virtual Fl_Gl_Choice *find(int m, const int *alistp);
+  virtual GLContext create_gl_context(Fl_Window* window, const Fl_Gl_Choice* g, int layer = 0);
+  virtual void set_gl_context(Fl_Window* w, GLContext context);
+  virtual void delete_gl_context(GLContext);
+#if HAVE_GL_OVERLAY
+  virtual void make_overlay(void *&o);
+  virtual int can_do_overlay();
+  virtual void hide_overlay();
+  virtual int overlay_color(Fl_Color i);
+#endif
+  virtual void make_overlay_current();
+  virtual void redraw_overlay();
+  virtual void waitGL();
+  virtual void gl_visual(Fl_Gl_Choice*); // support for Fl::gl_visual()
+  virtual void gl_start();
+  virtual void draw_string_legacy(const char* str, int n);
+  virtual void gl_bitmap_font(Fl_Font_Descriptor *fl_fontsize);
+  virtual void get_list(Fl_Font_Descriptor *fd, int r);
+  virtual int genlistsize();
+#if !USE_XFT
+  virtual Fl_Font_Descriptor** fontnum_to_fontdescriptor(int fnum);
+#endif
+  public:
+  static GLContext create_gl_context(XVisualInfo* vis);
+};
+
+#endif // FL_CFG_GFX_XLIB
+
+#endif /* Fl_Gl_Window_Driver_H */
+
+/**
+ \}
+ \endcond
+ */
+
+//
+// End of "$Id$".
+//