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/*-----------------------------------------------------------------
LOG
GEM - Graphics Environment for Multimedia
handling of diverse openGL stacks
Copyright (c) 1997-2000 Mark Danks. mark@danks.org
Copyright (c) Günther Geiger. geiger@epy.co.at
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_GEM_GLSTACK_H_
#define _INCLUDE__GEM_GEM_GLSTACK_H_
#include "Gem/ExportDef.h"
#include <memory>
namespace gem
{
class GEM_EXTERN GLStack
{
public:
explicit GLStack(bool haveValidContext=false);
virtual ~GLStack(void);
enum GemStackId { MODELVIEW, COLOR, TEXTURE, PROJECTION };
/** push the given matrix to the stack if the maximum has not been reached
* returns true on success and false otherwise (stack overflow)
* NOTE: needs valid openGL context
* NOTE: might change the current matrix mode; you have to manually reset it
*/
bool push(enum GemStackId);
/** pushes all matrices possible
* NOTE: finishes in MODELVIEW matrix mode
*/
void push(void);
/** pop the given matrix from the stack if the maximum has not been reached
* returns true on success and false otherwise (stack underflow)
* NOTE: needs valid openGL context
* NOTE: might change the current matrix mode; you have to manually reset it
*/
bool pop(enum GemStackId);
/** pops all matrices possible
* NOTE: finishes in MODELVIEW matrix mode
*/
void pop(void);
/**
* reset the maximum stack depth of the given stack
* NOTE: needs valid openGL context
*/
void reset(void);
/**
* reset the maximum stack depth of all stacks
* returns the current stack depth (-1 on failure)
* NOTE: needs valid openGL context
*/
int reset(enum GemStackId);
void print(void);
private:
class Data;
// try using unique_ptr<> if it is supported
#if __cplusplus < 201103L
std::auto_ptr<Data>data;
#else
std::unique_ptr<Data>data;
#endif
};
} /* namespace gem */
#endif /* _INCLUDE__GEM_GEM_GLSTACK_H_ */
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