b199a334d9
Removed EXT postfix of FrameBufferObject functions, and added support for checking non EXT versions frame buffer object GL functions. Introduced usage of OSG_GL*_FEATURES to avoid some #if #else #endif code blocks. Using a submissions from Paul Martz as a guide added perliminary GL3 support to a range of OSG classes
94 lines
2.8 KiB
C++
94 lines
2.8 KiB
C++
/* -*-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.
|
|
*/
|
|
|
|
#include <osg/GLExtensions>
|
|
#include <osg/GL>
|
|
#include <osg/PointSprite>
|
|
#include <osg/Point>
|
|
#include <osg/State>
|
|
#include <osg/buffered_value>
|
|
#include <osg/Notify>
|
|
|
|
using namespace osg;
|
|
|
|
PointSprite::PointSprite()
|
|
: _coordOriginMode(UPPER_LEFT)
|
|
{
|
|
}
|
|
|
|
PointSprite::~PointSprite()
|
|
{
|
|
}
|
|
|
|
int PointSprite::compare(const StateAttribute& sa) const
|
|
{
|
|
COMPARE_StateAttribute_Types(PointSprite,sa)
|
|
|
|
COMPARE_StateAttribute_Parameter(_coordOriginMode)
|
|
|
|
return 0; // passed all the above comparison macro's, must be equal.
|
|
}
|
|
|
|
|
|
bool PointSprite::checkValidityOfAssociatedModes(osg::State& state) const
|
|
{
|
|
|
|
bool modeValid = isPointSpriteSupported(state.getContextID());
|
|
state.setModeValidity(GL_POINT_SPRITE_ARB, modeValid);
|
|
|
|
return modeValid;
|
|
}
|
|
|
|
void PointSprite::apply(osg::State& state) const
|
|
{
|
|
#if defined( OSG_GL3_AVAILABLE )
|
|
const Point::Extensions* extensions = Point::getExtensions(state.getContextID(),true);
|
|
extensions->glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN,_coordOriginMode);
|
|
#elif defined( OSG_GL_FIXED_FUNCTION_AVAILABLE )
|
|
if(!isPointSpriteSupported(state.getContextID())) return;
|
|
|
|
glTexEnvi(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, 1);
|
|
|
|
const Point::Extensions* extensions = Point::getExtensions(state.getContextID(),true);
|
|
|
|
if (extensions->isPointSpriteCoordOriginSupported())
|
|
extensions->glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN,_coordOriginMode);
|
|
#else
|
|
osg::notify(osg::NOTICE)<<"Warning: PointSprite::apply(State&) - not supported."<<std::endl;
|
|
#endif
|
|
}
|
|
|
|
struct IntializedSupportedPair
|
|
{
|
|
IntializedSupportedPair():
|
|
initialized(false),
|
|
supported(false) {}
|
|
|
|
bool initialized;
|
|
bool supported;
|
|
};
|
|
|
|
typedef osg::buffered_object< IntializedSupportedPair > BufferedExtensions;
|
|
static BufferedExtensions s_extensions;
|
|
|
|
bool PointSprite::isPointSpriteSupported(unsigned int contextID)
|
|
{
|
|
if (!s_extensions[contextID].initialized)
|
|
{
|
|
s_extensions[contextID].initialized = true;
|
|
s_extensions[contextID].supported = OSG_GL3_FEATURES || isGLExtensionSupported(contextID, "GL_ARB_point_sprite") || isGLExtensionSupported(contextID, "GL_NV_point_sprite");
|
|
}
|
|
|
|
return s_extensions[contextID].supported;
|
|
}
|