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/*-----------------------------------------------------------------
LOG
GEM - Graphics Environment for Multimedia
The base class for all of the gem objects
Copyright (c) 1997-1999 Mark Danks. mark@danks.org
Copyright (c) Günther Geiger.
Copyright (c) 2001-2011 IOhannes m zmölnig. forum::für::umläute. IEM. zmoelnig@iem.at
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "GEM.LICENSE.TERMS" in this distribution.
-----------------------------------------------------------------*/
#ifndef _INCLUDE__GEM_BASE_GEMBASE_H_
#define _INCLUDE__GEM_BASE_GEMBASE_H_
#include "Gem/GemGL.h"
#include "Gem/ContextData.h"
#include "Base/CPPExtern.h"
class GemCache;
class GemState;
/*-----------------------------------------------------------------
-------------------------------------------------------------------
CLASS
GemBase
Base class for gem objects
DESCRIPTION
-----------------------------------------------------------------*/
class GEM_EXTERN GemBase : public CPPExtern
{
protected:
//////////
// Constructor
GemBase();
//////////
// Destructor
virtual ~GemBase();
//////////
virtual void render(GemState *state) = 0;
//////////
void continueRender(GemState *state);
//////////
// After objects below you in the chain have finished.
// You should reset all GEM/OpenGL states here.
virtual void postrender(GemState *) { ; }
//////////
// Called when rendering stops
#if 1/*(jmz) this seems to be for gem2pdp*/
virtual void stoprender()
{
realStopRendering();
}
#endif
//////////
// If you care about the start of rendering
virtual void startRendering() { ; }
//////////
// If you care about the stop of rendering
virtual void stopRendering() { ; }
//////////
// has rendering started ?
// deprecated, use 'getState()==RENDERING' instead
bool gem_amRendering;
//////////
// If anything in the object has changed
virtual void setModified();
//////////
// Don't mess with this unless you know what you are doing.
GemCache *m_cache;
//////////
// check whether this object has changed
bool m_modified;
//////////
// The outlet
t_outlet *m_out1;
//////////
// this gets called in the before the startRendering() routine
// if it returns TRUE, the object's startRendering(), render() and stopRendering() functions will be called
// it it returns FALSE, the object will be disabled
// when rendering is restarted, this function get's called again
// the default is to enable rendering
// this function is important if you want to disable an object because it cannot be used (e.g. missing driver support)
virtual bool isRunnable(void);
//////////
// creation callback
static void real_obj_setupCallback(t_class *classPtr)
{
CPPExtern::real_obj_setupCallback(classPtr);
GemBase::obj_setupCallback(classPtr);
}
enum RenderState {INIT, ENABLED, DISABLED, RENDERING, MODIFIED};
private:
void realStopRendering();
void gem_startstopMess(int state);
void gem_renderMess(GemCache* cache, GemState* state);
static inline GemBase *GetMyClass(void *data)
{
return((GemBase *)((Obj_header *)data)->data);
}
friend class gemhead;
static void obj_setupCallback(t_class *classPtr);
static void gem_MessCallback(void *, t_symbol *,int, t_atom*);
/* whether the object is internally disabled or not
* objects are to be disabled, if the system cannot make use of them, e.g. because of unsupported openGL features
*/
gem::ContextData<bool>m_enabled;
gem::ContextData<enum RenderState>m_state;
protected:
enum RenderState getState(void);
virtual void beforeDeletion(void);
};
#endif // for header file
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