101 lines
3.9 KiB
C++
101 lines
3.9 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2014 Robert Osfield
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* Copyright (C) 2014 Pawel Ksiezopolski
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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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*/
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#ifndef OSG_DRAWINDIRECTPRIMITIVESET
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#define OSG_DRAWINDIRECTPRIMITIVESET 1
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#include <osg/PrimitiveSet>
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#include <osg/BufferObject>
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#include <osg/TextureBuffer>
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#ifndef GL_ARB_draw_indirect
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#define GL_DRAW_INDIRECT_BUFFER 0x8F3F
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#define GL_DRAW_INDIRECT_BUFFER_BINDING 0x8F43
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#endif
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#ifndef GL_SHADER_IMAGE_ACCESS_BARRIER_BIT
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#define GL_SHADER_IMAGE_ACCESS_BARRIER_BIT 0x00000020
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#endif
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class DrawArraysIndirect : public osg::DrawArrays
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{
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public:
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DrawArraysIndirect(GLenum mode=0, osg::TextureBuffer* buffer=NULL, unsigned int indirect=0)
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: osg::DrawArrays(mode), _buffer(buffer), _indirect(indirect)
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{
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}
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virtual osg::Object* cloneType() const { return new DrawArraysIndirect(); }
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virtual osg::Object* clone(const osg::CopyOp& /*copyop*/) const { return NULL; }
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virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const DrawArraysIndirect*>(obj)!=NULL; }
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virtual const char* libraryName() const { return "osg"; }
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virtual const char* className() const { return "DrawArraysIndirect"; }
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virtual void draw(osg::State& state, bool useVertexBufferObjects) const;
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protected:
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osg::ref_ptr<osg::TextureBuffer> _buffer;
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unsigned int _indirect;
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};
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class MultiDrawArraysIndirect : public osg::DrawArrays
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{
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public:
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MultiDrawArraysIndirect(GLenum mode=0, osg::TextureBuffer* buffer=NULL, unsigned int indirect=0, GLsizei drawcount=0, GLsizei stride=0)
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: osg::DrawArrays(mode), _buffer(buffer), _indirect(indirect), _drawcount(drawcount), _stride(stride)
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{
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}
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virtual osg::Object* cloneType() const { return new MultiDrawArraysIndirect(); }
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virtual osg::Object* clone(const osg::CopyOp& /*copyop*/) const { return NULL; }
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virtual bool isSameKindAs(const osg::Object* obj) const { return dynamic_cast<const MultiDrawArraysIndirect*>(obj)!=NULL; }
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virtual const char* libraryName() const { return "osg"; }
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virtual const char* className() const { return "MultiDrawArraysIndirect"; }
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virtual void draw(osg::State& state, bool useVertexBufferObjects) const;
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protected:
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osg::ref_ptr<osg::TextureBuffer> _buffer;
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unsigned int _indirect;
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GLsizei _drawcount;
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GLsizei _stride;
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};
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class DrawIndirectGLExtensions : public osg::Referenced
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{
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public:
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DrawIndirectGLExtensions( unsigned int contextID );
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DrawIndirectGLExtensions( const DrawIndirectGLExtensions &rhs );
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void lowestCommonDenominator( const DrawIndirectGLExtensions &rhs );
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void setupGLExtensions( unsigned int contextID );
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void glDrawArraysIndirect(GLenum mode, const void * indirect) const;
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void glMultiDrawArraysIndirect(GLenum mode, const void *indirect, GLsizei drawcount, GLsizei stride);
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void glMemoryBarrier(GLbitfield barriers);
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static DrawIndirectGLExtensions* getExtensions( unsigned int contextID,bool createIfNotInitalized );
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protected:
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typedef void ( GL_APIENTRY *DrawArraysIndirectProc ) (GLenum mode, const void * indirect);
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typedef void ( GL_APIENTRY *MultiDrawArraysIndirectProc ) (GLenum mode, const void *indirect, GLsizei drawcount, GLsizei stride);
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typedef void ( GL_APIENTRY *MemoryBarrierProc ) (GLbitfield barriers);
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DrawArraysIndirectProc _glDrawArraysIndirect;
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MultiDrawArraysIndirectProc _glMultiDrawArraysIndirect;
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MemoryBarrierProc _glMemoryBarrier;
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};
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#endif
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