145 lines
4.8 KiB
C++
145 lines
4.8 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2005 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_CLAMPCOLOR
|
|
#define OSG_CLAMPCOLOR 1
|
|
|
|
#include <osg/StateAttribute>
|
|
|
|
#ifndef GL_ARB_color_buffer_float
|
|
#define GL_RGBA_FLOAT_MODE_ARB 0x8820
|
|
#define GL_CLAMP_VERTEX_COLOR_ARB 0x891A
|
|
#define GL_CLAMP_FRAGMENT_COLOR_ARB 0x891B
|
|
#define GL_CLAMP_READ_COLOR_ARB 0x891C
|
|
#define GL_FIXED_ONLY_ARB 0x891D
|
|
#endif
|
|
|
|
namespace osg {
|
|
|
|
/** Encapsulates OpenGL ClampColor state. */
|
|
class OSG_EXPORT ClampColor : public StateAttribute
|
|
{
|
|
public :
|
|
|
|
enum Target {
|
|
CLAMP_VERTEX_COLOR = GL_CLAMP_VERTEX_COLOR_ARB,
|
|
CLAMP_FRAGMENT_COLOR = GL_CLAMP_FRAGMENT_COLOR_ARB,
|
|
CLAMP_READ_COLOR = GL_CLAMP_READ_COLOR_ARB
|
|
};
|
|
|
|
enum Mode {
|
|
FIXED_ONLY = GL_FIXED_ONLY_ARB,
|
|
FALSE = GL_FALSE,
|
|
TRUE = GL_TRUE
|
|
};
|
|
|
|
|
|
ClampColor();
|
|
|
|
ClampColor(Target target, Mode mode);
|
|
|
|
/** Copy constructor using CopyOp to manage deep vs shallow copy. */
|
|
ClampColor(const ClampColor& trans,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
|
|
StateAttribute(trans,copyop),
|
|
_target(trans._target),
|
|
_mode(trans._mode) {}
|
|
|
|
META_StateAttribute(osg, ClampColor,CLAMPCOLOR);
|
|
|
|
/** 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_Paramter macros below.
|
|
COMPARE_StateAttribute_Types(ClampColor,sa)
|
|
|
|
// Compare each parameter in turn against the rhs.
|
|
COMPARE_StateAttribute_Parameter(_target)
|
|
COMPARE_StateAttribute_Parameter(_mode)
|
|
|
|
return 0; // Passed all the above comparison macros, so must be equal.
|
|
}
|
|
|
|
inline void setTarget(Target target)
|
|
{
|
|
_target = target;
|
|
}
|
|
|
|
inline Target getTarget() const { return _target; }
|
|
|
|
|
|
inline void setMode(Mode mode)
|
|
{
|
|
_mode = mode;
|
|
}
|
|
|
|
inline Mode getMode() const { return _mode; }
|
|
|
|
|
|
virtual void apply(State& state) const;
|
|
/** Encapsulates queries of extension availability, obtains extension
|
|
* function pointers, and provides convinience wrappers for
|
|
* calling extension functions. */
|
|
class OSG_EXPORT Extensions : public osg::Referenced
|
|
{
|
|
public:
|
|
Extensions(unsigned int contextID);
|
|
|
|
Extensions(const Extensions& rhs);
|
|
|
|
void lowestCommonDenominator(const Extensions& rhs);
|
|
|
|
void setupGLExtenions(unsigned int contextID);
|
|
|
|
void setClampColorSupported(bool flag) { _isClampColorSupported=flag; }
|
|
bool isClampColorSupported() const { return _isClampColorSupported; }
|
|
|
|
void setClampColorProc(void* ptr) { _glClampColor = ptr; }
|
|
void glClampColor(GLenum target, GLenum mode) const;
|
|
|
|
protected:
|
|
|
|
~Extensions() {}
|
|
|
|
bool _isClampColorSupported;
|
|
|
|
void* _glClampColor;
|
|
|
|
};
|
|
|
|
/** Returns the Extensions object for the given context.
|
|
* If createIfNotInitalized is true and the Exentsions object doesn't
|
|
* exist, getExtensions() creates it on the given context.
|
|
* Returns NULL if createIfNotInitalized is false and the Extensions
|
|
* object doesn't exist. */
|
|
static Extensions* getExtensions(unsigned int contextID,bool createIfNotInitalized);
|
|
|
|
/** setExtensions() allows users to override the extensions across graphics contexts.
|
|
* Typically used when you have different extensions supported across graphics pipes,
|
|
* but need to ensure that they all use the same low common denominator extensions. */
|
|
static void setExtensions(unsigned int contextID,Extensions* extensions);
|
|
|
|
|
|
protected :
|
|
|
|
virtual ~ClampColor();
|
|
|
|
|
|
Target _target;
|
|
Mode _mode;
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|