485709f708
Moved the #defines into new include/osg/GLDefines Converted all GL2Extensions usage to GLExtensions usage git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14593 16af8721-9629-0410-8352-f15c8da7e697
159 lines
6.1 KiB
C++
159 lines
6.1 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/StencilTwoSided>
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#include <osg/State>
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#include <osg/GLExtensions>
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#include <osg/Notify>
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using namespace osg;
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StencilTwoSided::StencilTwoSided()
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{
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// set up same defaults as glStencilFunc.
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_func[FRONT] = _func[BACK] = ALWAYS;
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_funcRef[FRONT] = _funcRef[BACK] = 0;
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_funcMask[FRONT] = _funcMask[BACK] = ~0u;
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// set up same defaults as glStencilOp.
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_sfail[FRONT] = _sfail[BACK] = KEEP;
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_zfail[FRONT] = _zfail[BACK] = KEEP;
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_zpass[FRONT] = _zpass[BACK] = KEEP;
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_writeMask[FRONT] = _writeMask[BACK] = ~0u;
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}
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StencilTwoSided::StencilTwoSided(const StencilTwoSided& stencil,const CopyOp& copyop):
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StateAttribute(stencil,copyop)
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{
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_func[FRONT] = stencil._func[FRONT];
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_funcRef[FRONT] = stencil._funcRef[FRONT];
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_funcMask[FRONT] = stencil._funcMask[FRONT];
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_sfail[FRONT] = stencil._sfail[FRONT];
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_zfail[FRONT] = stencil._zfail[FRONT];
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_zpass[FRONT] = stencil._zpass[FRONT];
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_writeMask[FRONT] = stencil._writeMask[FRONT];
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_func[BACK] = stencil._func[BACK];
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_funcRef[BACK] = stencil._funcRef[BACK];
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_funcMask[BACK] = stencil._funcMask[BACK];
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_sfail[BACK] = stencil._sfail[BACK];
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_zfail[BACK] = stencil._zfail[BACK];
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_zpass[BACK] = stencil._zpass[BACK];
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_writeMask[BACK] = stencil._writeMask[BACK];
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}
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StencilTwoSided::~StencilTwoSided()
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{
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}
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int StencilTwoSided::compare(const StateAttribute& sa) const
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{
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// check the types are equal and then create the rhs variable
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// used by the COMPARE_StateAttribute_Parameter macros below.
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COMPARE_StateAttribute_Types(StencilTwoSided,sa)
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// compare each parameter in turn against the rhs.
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COMPARE_StateAttribute_Parameter(_func[FRONT])
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COMPARE_StateAttribute_Parameter(_funcRef[FRONT])
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COMPARE_StateAttribute_Parameter(_funcMask[FRONT])
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COMPARE_StateAttribute_Parameter(_sfail[FRONT])
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COMPARE_StateAttribute_Parameter(_zfail[FRONT])
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COMPARE_StateAttribute_Parameter(_zpass[FRONT])
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COMPARE_StateAttribute_Parameter(_writeMask[FRONT])
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COMPARE_StateAttribute_Parameter(_func[BACK])
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COMPARE_StateAttribute_Parameter(_funcRef[BACK])
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COMPARE_StateAttribute_Parameter(_funcMask[BACK])
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COMPARE_StateAttribute_Parameter(_sfail[BACK])
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COMPARE_StateAttribute_Parameter(_zfail[BACK])
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COMPARE_StateAttribute_Parameter(_zpass[BACK])
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COMPARE_StateAttribute_Parameter(_writeMask[BACK])
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return 0; // passed all the above comparison macros, must be equal.
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}
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void StencilTwoSided::apply(State& state) const
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{
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// get "per-context" extensions
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const unsigned int contextID = state.getContextID();
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const GLExtensions* extensions = state.get<GLExtensions>();
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// use OpenGL 2.0 functions if available
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if (extensions->isOpenGL20Supported)
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{
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// front face
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extensions->glStencilOpSeparate(GL_FRONT, (GLenum)_sfail[FRONT],(GLenum)_zfail[FRONT],(GLenum)_zpass[FRONT]);
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extensions->glStencilMaskSeparate(GL_FRONT, _writeMask[FRONT]);
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extensions->glStencilFuncSeparate(GL_FRONT, (GLenum)_func[FRONT],_funcRef[FRONT],_funcMask[FRONT]);
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// back face
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extensions->glStencilOpSeparate(GL_BACK, (GLenum)_sfail[BACK],(GLenum)_zfail[BACK],(GLenum)_zpass[BACK]);
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extensions->glStencilMaskSeparate(GL_BACK, _writeMask[BACK]);
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extensions->glStencilFuncSeparate(GL_BACK, (GLenum)_func[BACK],_funcRef[BACK],_funcMask[BACK]);
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return;
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}
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// try to use GL_EXT_stencil_two_side extension
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if (extensions->isStencilTwoSidedSupported)
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{
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// enable two sided stenciling
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glEnable(GL_STENCIL_TEST_TWO_SIDE);
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// back face
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extensions->glActiveStencilFace(GL_BACK);
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glStencilOp((GLenum)_sfail[BACK],(GLenum)_zfail[BACK],(GLenum)_zpass[BACK]);
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glStencilMask(_writeMask[BACK]);
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glStencilFunc((GLenum)_func[BACK],_funcRef[BACK],_funcMask[BACK]);
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// front face
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extensions->glActiveStencilFace(GL_FRONT);
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glStencilOp((GLenum)_sfail[FRONT],(GLenum)_zfail[FRONT],(GLenum)_zpass[FRONT]);
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glStencilMask(_writeMask[FRONT]);
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glStencilFunc((GLenum)_func[FRONT],_funcRef[FRONT],_funcMask[FRONT]);
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return;
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}
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// try to use GL_ATI_separate_stencil extension
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if (extensions->isSeparateStencilSupported)
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{
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if( _writeMask[FRONT] != _writeMask[BACK] ||
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_funcRef[FRONT] != _funcRef[BACK] ||
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_funcMask[FRONT] != _funcMask[BACK] )
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{
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OSG_WARN << "StencilTwoSided uses GL_ATI_separate_stencil and there are different\n"
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" write mask, functionRef or functionMask values for the front and back\n"
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" faces. This is not supported by the extension. Using front values only." << std::endl;
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}
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glStencilMask(_writeMask[FRONT]);
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// front face
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extensions->glStencilOpSeparate(GL_FRONT, (GLenum)_sfail[FRONT], (GLenum)_zfail[FRONT], (GLenum)_zpass[FRONT]);
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extensions->glStencilFuncSeparateATI((GLenum)_func[FRONT], (GLenum)_func[BACK], _funcRef[FRONT], _funcMask[FRONT]);
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// back face
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extensions->glStencilOpSeparate(GL_BACK, (GLenum)_sfail[BACK], (GLenum)_zfail[BACK], (GLenum)_zpass[BACK]);
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extensions->glStencilFuncSeparateATI((GLenum)_func[FRONT], (GLenum)_func[BACK], _funcRef[FRONT], _funcMask[FRONT]);
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return;
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}
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OSG_WARN << "StencilTwoSided failed as the required graphics capabilities were\n"
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" not found (contextID " << contextID << "). OpenGL 2.0 or one of extensions\n"
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" GL_EXT_stencil_two_side or GL_ATI_separate_stencil is required." << std::endl;
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}
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