eac3dc1963
of these are public APIs and therefore will break linkage to existing shared libraries." Note from Robert Osfield, updated wrappers.
116 lines
3.5 KiB
C++
116 lines
3.5 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <osg/ClampColor>
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#include <osg/GLExtensions>
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#include <osg/State>
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#include <osg/Notify>
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#include <osg/buffered_value>
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using namespace osg;
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ClampColor::ClampColor():
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_clampVertexColor(GL_FIXED_ONLY),
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_clampFragmentColor(GL_FIXED_ONLY),
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_clampReadColor(GL_FIXED_ONLY)
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{
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}
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ClampColor::ClampColor(GLenum vertexMode, GLenum fragmentMode, GLenum readMode):
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_clampVertexColor(vertexMode),
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_clampFragmentColor(fragmentMode),
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_clampReadColor(readMode)
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{
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}
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ClampColor::~ClampColor()
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{
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}
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void ClampColor::apply(State& state) const
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{
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// get the contextID (user defined ID of 0 upwards) for the
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// current OpenGL context.
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const unsigned int contextID = state.getContextID();
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const Extensions* extensions = getExtensions(contextID,true);
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if (!extensions->isClampColorSupported())
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{
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notify(WARN)<<"Warning: ClampColor::apply(..) failed, ClampColor is not support by OpenGL driver."<<std::endl;
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return;
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}
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extensions->glClampColor(GL_CLAMP_VERTEX_COLOR, _clampVertexColor);
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extensions->glClampColor(GL_CLAMP_FRAGMENT_COLOR, _clampFragmentColor);
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extensions->glClampColor(GL_CLAMP_READ_COLOR, _clampReadColor);
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}
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typedef buffered_value< ref_ptr<ClampColor::Extensions> > BufferedExtensions;
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static BufferedExtensions s_extensions;
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ClampColor::Extensions* ClampColor::getExtensions(unsigned int contextID,bool createIfNotInitalized)
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{
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if (!s_extensions[contextID] && createIfNotInitalized) s_extensions[contextID] = new Extensions(contextID);
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return s_extensions[contextID].get();
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}
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void ClampColor::setExtensions(unsigned int contextID,Extensions* extensions)
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{
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s_extensions[contextID] = extensions;
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}
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ClampColor::Extensions::Extensions(unsigned int contextID)
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{
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setupGLExtensions(contextID);
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}
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ClampColor::Extensions::Extensions(const Extensions& rhs):
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Referenced()
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{
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_isClampColorSupported = rhs._isClampColorSupported;
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_glClampColor = rhs._glClampColor;
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}
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void ClampColor::Extensions::lowestCommonDenominator(const Extensions& rhs)
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{
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if (!rhs._isClampColorSupported) _isClampColorSupported = false;
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if (!rhs._glClampColor) _glClampColor = 0;
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}
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void ClampColor::Extensions::setupGLExtensions(unsigned int contextID)
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{
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_isClampColorSupported = isGLExtensionSupported(contextID,"GL_ARB_color_buffer_float") ||
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strncmp((const char*)glGetString(GL_VERSION),"2.0",3)>=0;
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_glClampColor = getGLExtensionFuncPtr("glClampColor", "glClampColorARB");
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}
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void ClampColor::Extensions::glClampColor(GLenum target, GLenum mode) const
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{
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if (_glClampColor)
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{
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typedef void (APIENTRY * GLClampColorProc) (GLenum target, GLenum mode);
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((GLClampColorProc)_glClampColor)(target,mode);
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}
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else
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{
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notify(WARN)<<"Error: glClampColor not supported by OpenGL driver"<<std::endl;
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}
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}
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