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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#ifndef OSG_TEXENV
#define OSG_TEXENV 1
#include <osg/GL>
#include <osg/StateAttribute>
#include <osg/Vec4>
#ifndef OSG_GL_FIXED_FUNCTION_AVAILABLE
#define GL_MODULATE 0x2100
#define GL_ADD 0x0104
#define GL_MODULATE 0x2100
#define GL_DECAL 0x2101
#endif
namespace osg {
/** TexEnv encapsulates the OpenGL glTexEnv (texture environment) state.
*/
class OSG_EXPORT TexEnv : public StateAttribute
{
public :
enum Mode {
DECAL = GL_DECAL,
MODULATE = GL_MODULATE,
BLEND = GL_BLEND,
REPLACE = GL_REPLACE,
ADD = GL_ADD
};
TexEnv(Mode mode=MODULATE);
/** Copy constructor using CopyOp to manage deep vs shallow copy. */
TexEnv(const TexEnv& texenv,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
StateAttribute(texenv,copyop),
_mode(texenv._mode),
_color(texenv._color) {}
META_StateAttribute(osg, TexEnv, TEXENV);
virtual bool isTextureAttribute() const { return true; }
/** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
virtual int compare(const StateAttribute& sa) const
{
// Check for equal types, then create the rhs variable
// used by the COMPARE_StateAttribute_Parameter macros below.
COMPARE_StateAttribute_Types(TexEnv,sa)
// Compare each parameter in turn against the rhs.
COMPARE_StateAttribute_Parameter(_mode)
COMPARE_StateAttribute_Parameter(_color)
return 0; // Passed all the above comparison macros, so must be equal.
}
void setMode( Mode mode ) { _mode = mode; }
Mode getMode() const { return _mode; }
void setColor( const Vec4& color ) { _color = color; }
Vec4& getColor() { return _color; }
const Vec4& getColor() const { return _color; }
virtual void apply(State& state) const;
protected :
virtual ~TexEnv( void );
Mode _mode;
osg::Vec4 _color;
};
}
#endif