diff options
Diffstat (limited to 'src/Fl_Gl_Choice.H')
| -rw-r--r-- | src/Fl_Gl_Choice.H | 76 |
1 files changed, 45 insertions, 31 deletions
diff --git a/src/Fl_Gl_Choice.H b/src/Fl_Gl_Choice.H index 986ee5d65..2fd10c967 100644 --- a/src/Fl_Gl_Choice.H +++ b/src/Fl_Gl_Choice.H @@ -1,5 +1,5 @@ // -// "$Id: Fl_Gl_Choice.H,v 1.4.2.5 2001/01/22 15:13:39 easysw Exp $" +// "$Id: Fl_Gl_Choice.H,v 1.4.2.6 2001/03/14 17:20:01 spitzak Exp $" // // OpenGL definitions for the Fast Light Tool Kit (FLTK). // @@ -20,42 +20,49 @@ // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 // USA. // -// Please report all bugs and problems to "fltk-bugs@fltk.org". +// Please report all bugs and problems to "fltk-bugs@easysw.com". // // 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() +// A "Fl_Gl_Choice" is created from an OpenGL mode and holds information +// necessary to create a window (on X) and to create an OpenGL "context" +// (on both X and Win32). +// +// fl_create_gl_context takes a window (necessary only on Win32) and an +// Fl_Gl_Choice and returns a new OpenGL context. All contexts share +// display lists with each other. +// +// On X another fl_create_gl_context is provided to create it for any +// X visual. +// +// fl_set_gl_context makes the given OpenGL context current and makes +// it draw into the passed window. It tracks the current one context +// to avoid calling the context switching code when the same context +// is used, though it is a mystery to me why the GLX/WGL libraries +// don't do this themselves... +// +// fl_no_gl_context clears that cache so the next fl_set_gl_context is +// guaranteed to work. +// +// fl_delete_gl_context destroys the context. +// +// This code is used by Fl_Gl_Window, gl_start(), and gl_visual() #ifndef Fl_Gl_Choice_H #define Fl_Gl_Choice_H +// Warning: whatever GLContext is defined to must take exactly the same +// space in a structure as a void*!!! #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 +# define GLContext HGLRC #else # include <GL/glx.h> +# define GLContext GLXContext #endif -// one of these structures is returned: +// Describes crap needed to create a GLContext. class Fl_Gl_Choice { int mode; const int *alist; @@ -68,28 +75,35 @@ public: XVisualInfo *vis; // the visual to use Colormap colormap; // a colormap for that visual #endif - uchar r,d,o; // rgb mode, double buffered, overlay flags // 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: static Fl_Gl_Choice *find(int mode, const int *); }; -extern GLXContext fl_first_context; // used to make all contexts share -extern GLXContext fl_current_context; - class Fl_Window; #ifdef WIN32 -// This must be called before fl_set_gl_context works: -HDC fl_private_dc(Fl_Window*, int, Fl_Gl_Choice **gp); + +GLContext fl_create_gl_context(Fl_Window*, const Fl_Gl_Choice*, int layer=0); + +#else + +GLContext fl_create_gl_context(XVisualInfo* vis); + +static inline +GLContext fl_create_gl_context(Fl_Window*, const Fl_Gl_Choice* g) { + return fl_create_gl_context(g->vis); +} + #endif -void fl_set_gl_context(Fl_Window*, GLXContext); +void fl_set_gl_context(Fl_Window*, GLContext); void fl_no_gl_context(); +void fl_delete_gl_context(GLContext); #endif // -// End of "$Id: Fl_Gl_Choice.H,v 1.4.2.5 2001/01/22 15:13:39 easysw Exp $". +// End of "$Id: Fl_Gl_Choice.H,v 1.4.2.6 2001/03/14 17:20:01 spitzak Exp $". // |