146 lines
4.6 KiB
Plaintext
146 lines
4.6 KiB
Plaintext
//C++ header - Open Scene Graph - Copyright (C) 1998-2001 Robert Osfield
|
|
//Distributed under the terms of the GNU Library General Public License (LGPL)
|
|
//as published by the Free Software Foundation.
|
|
|
|
#ifndef OSG_STENCIL
|
|
#define OSG_STENCIL 1
|
|
|
|
#include <osg/StateAttribute>
|
|
#include <osg/Types>
|
|
|
|
namespace osg {
|
|
|
|
/** Encapsulate OpenGL glStencilFunc/Op/Mask functions.
|
|
*/
|
|
class SG_EXPORT Stencil : public StateAttribute
|
|
{
|
|
public :
|
|
|
|
|
|
Stencil();
|
|
|
|
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
|
|
Stencil(const Stencil& stencil,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
|
|
StateAttribute(stencil,copyop),
|
|
_func(stencil._func),
|
|
_funcRef(stencil._funcRef),
|
|
_funcMask(stencil._funcMask),
|
|
_sfail(stencil._sfail),
|
|
_zfail(stencil._zfail),
|
|
_zpass(stencil._zpass),
|
|
_writeMask(stencil._writeMask) {}
|
|
|
|
|
|
META_StateAttribute(osg, Stencil, STENCIL);
|
|
|
|
/** return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs.*/
|
|
virtual int compare(const StateAttribute& sa) const
|
|
{
|
|
// check the types are equal and then create the rhs variable
|
|
// used by the COMPARE_StateAttribute_Paramter macro's below.
|
|
COMPARE_StateAttribute_Types(Stencil,sa)
|
|
|
|
// compare each paramter in turn against the rhs.
|
|
COMPARE_StateAttribute_Parameter(_func)
|
|
COMPARE_StateAttribute_Parameter(_funcRef)
|
|
COMPARE_StateAttribute_Parameter(_funcMask)
|
|
COMPARE_StateAttribute_Parameter(_sfail)
|
|
COMPARE_StateAttribute_Parameter(_zfail)
|
|
COMPARE_StateAttribute_Parameter(_zpass)
|
|
COMPARE_StateAttribute_Parameter(_writeMask)
|
|
|
|
return 0; // passed all the above comparison macro's, must be equal.
|
|
}
|
|
|
|
virtual void getAssociatedModes(std::vector<GLMode>& modes) const
|
|
{
|
|
modes.push_back(GL_STENCIL_TEST);
|
|
}
|
|
|
|
enum Function
|
|
{
|
|
NEVER = GL_NEVER,
|
|
LESS = GL_LESS,
|
|
EQUAL = GL_EQUAL,
|
|
LEQUAL = GL_LEQUAL,
|
|
GREATER = GL_GREATER,
|
|
NOTEQUAL = GL_NOTEQUAL,
|
|
GEQUAL = GL_GEQUAL,
|
|
ALWAYS = GL_ALWAYS
|
|
};
|
|
|
|
inline void setFunction(const Function func,int ref,uint mask)
|
|
{
|
|
_func = func;
|
|
_funcRef = ref;
|
|
_funcMask = mask;
|
|
}
|
|
|
|
inline const Function getFunction() const { return _func; }
|
|
|
|
inline const int getFunctionRef() const { return _funcRef; }
|
|
|
|
inline const uint getFunctionMask() const { return _funcMask; }
|
|
|
|
|
|
enum Operation
|
|
{
|
|
KEEP = GL_KEEP,
|
|
ZERO = GL_ZERO,
|
|
REPLACE = GL_REPLACE,
|
|
INCR = GL_INCR,
|
|
DECR = GL_DECR,
|
|
INVERT = GL_INVERT
|
|
};
|
|
|
|
/** set the operations to apply when the various stencil and depth
|
|
* tests fail or pass. First parameter is to control the operation
|
|
* when the stencil test fails. The second parameter is to control the
|
|
* operation when the stencil test passes, but depth test fails. The
|
|
* third parameter controls the operation when both the stencil test
|
|
* and depth pass. Ordering of parameter is the same as if using
|
|
* glStencilOp(,,).*/
|
|
inline void setOperation(const Operation sfail, const Operation zfail, const Operation zpass)
|
|
{
|
|
_sfail = sfail;
|
|
_zfail = zfail;
|
|
_zpass = zpass;
|
|
}
|
|
|
|
/** get the operation when the stencil test fails.*/
|
|
inline const Operation getStencilFailOperation() const { return _sfail; }
|
|
|
|
/** get the operation when the stencil test passes but the depth test fails*/
|
|
inline const Operation getStencilPassAndDepthFailOperation() const { return _zfail; }
|
|
|
|
/** get the operation when both the stencil test and the depth test pass*/
|
|
inline const Operation getStencilPassAndDepthPassOperation() const { return _zpass; }
|
|
|
|
|
|
inline void setWriteMask(uint mask) { _writeMask = mask; }
|
|
|
|
inline const uint getWriteMask() const { return _writeMask; }
|
|
|
|
|
|
virtual void apply(State& state) const;
|
|
|
|
protected:
|
|
|
|
virtual ~Stencil();
|
|
|
|
Function _func;
|
|
int _funcRef;
|
|
uint _funcMask;
|
|
|
|
Operation _sfail;
|
|
Operation _zfail;
|
|
Operation _zpass;
|
|
|
|
uint _writeMask;
|
|
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|