826 lines
26 KiB
C++
826 lines
26 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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// initial FBO support written by Marco Jez, June 2005.
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#include <osg/FrameBufferObject>
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#include <osg/State>
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#include <osg/GLExtensions>
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#include <osg/Texture1D>
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#include <osg/Texture2D>
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#include <osg/Texture3D>
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#include <osg/Texture2DArray>
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#include <osg/TextureCubeMap>
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#include <osg/TextureRectangle>
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#include <osg/Notify>
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#include <osg/Timer>
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using namespace osg;
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static buffered_object< ref_ptr<FBOExtensions> > s_extensions;
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FBOExtensions* FBOExtensions::instance(unsigned contextID, bool createIfNotInitalized)
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{
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if (!s_extensions[contextID] && createIfNotInitalized) s_extensions[contextID] = new FBOExtensions(contextID);
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return s_extensions[contextID].get();
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}
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/**************************************************************************
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* FBOExtensions
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**************************************************************************/
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#define LOAD_FBO_EXT(name) setGLExtensionFuncPtr(name, (#name))
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FBOExtensions::FBOExtensions(unsigned int contextID)
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: _supported(false),
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glBindRenderbufferEXT(0),
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glGenRenderbuffersEXT(0),
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glDeleteRenderbuffersEXT(0),
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glRenderbufferStorageEXT(0),
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glRenderbufferStorageMultisampleEXT(0),
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glRenderbufferStorageMultisampleCoverageNV(0),
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glBindFramebufferEXT(0),
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glDeleteFramebuffersEXT(0),
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glGenFramebuffersEXT(0),
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glCheckFramebufferStatusEXT(0),
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glFramebufferTexture1DEXT(0),
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glFramebufferTexture2DEXT(0),
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glFramebufferTexture3DEXT(0),
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glFramebufferTextureLayerEXT(0),
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glFramebufferRenderbufferEXT(0),
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glGenerateMipmapEXT(0),
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glBlitFramebufferEXT(0)
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{
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if (!isGLExtensionSupported(contextID, "GL_EXT_framebuffer_object"))
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return;
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LOAD_FBO_EXT(glBindRenderbufferEXT);
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LOAD_FBO_EXT(glGenRenderbuffersEXT);
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LOAD_FBO_EXT(glDeleteRenderbuffersEXT);
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LOAD_FBO_EXT(glRenderbufferStorageEXT);
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LOAD_FBO_EXT(glBindFramebufferEXT);
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LOAD_FBO_EXT(glDeleteFramebuffersEXT);
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LOAD_FBO_EXT(glGenFramebuffersEXT);
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LOAD_FBO_EXT(glCheckFramebufferStatusEXT);
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LOAD_FBO_EXT(glFramebufferTexture1DEXT);
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LOAD_FBO_EXT(glFramebufferTexture2DEXT);
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LOAD_FBO_EXT(glFramebufferTexture3DEXT);
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LOAD_FBO_EXT(glFramebufferTextureLayerEXT);
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LOAD_FBO_EXT(glFramebufferRenderbufferEXT);
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LOAD_FBO_EXT(glGenerateMipmapEXT);
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_supported =
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glBindRenderbufferEXT != 0 &&
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glDeleteRenderbuffersEXT != 0 &&
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glGenRenderbuffersEXT != 0 &&
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glRenderbufferStorageEXT != 0 &&
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glBindFramebufferEXT != 0 &&
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glDeleteFramebuffersEXT != 0 &&
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glGenFramebuffersEXT != 0 &&
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glCheckFramebufferStatusEXT != 0 &&
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glFramebufferTexture1DEXT != 0 &&
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glFramebufferTexture2DEXT != 0 &&
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glFramebufferTexture3DEXT != 0 &&
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glFramebufferRenderbufferEXT != 0 &&
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glGenerateMipmapEXT != 0;
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if (!isGLExtensionSupported(contextID, "GL_EXT_framebuffer_blit"))
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return;
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LOAD_FBO_EXT(glBlitFramebufferEXT);
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if (isGLExtensionSupported(contextID, "GL_EXT_framebuffer_multisample"))
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{
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LOAD_FBO_EXT(glRenderbufferStorageMultisampleEXT);
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}
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if (isGLExtensionSupported(contextID, "GL_NV_framebuffer_multisample_coverage"))
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{
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LOAD_FBO_EXT(glRenderbufferStorageMultisampleCoverageNV);
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}
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}
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/**************************************************************************
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* RenderBuffer
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**************************************************************************/
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///////////////////////////////////////////////////////////////////////////
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// static cache of glRenderbuffers flagged for deletion, which will actually
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// be deleted in the correct GL context.
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typedef std::list<GLuint> RenderBufferHandleList;
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typedef osg::buffered_object<RenderBufferHandleList> DeletedRenderBufferCache;
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static OpenThreads::Mutex s_mutex_deletedRenderBufferCache;
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static DeletedRenderBufferCache s_deletedRenderBufferCache;
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void RenderBuffer::deleteRenderBuffer(unsigned int contextID, GLuint rb)
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{
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if( rb )
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_mutex_deletedRenderBufferCache);
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// add glProgram to the cache for the appropriate context.
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s_deletedRenderBufferCache[contextID].push_back(rb);
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}
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}
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void RenderBuffer::flushDeletedRenderBuffers(unsigned int contextID,double /*currentTime*/, double& availableTime)
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{
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// if no time available don't try to flush objects.
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if (availableTime<=0.0) return;
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const FBOExtensions* extensions = FBOExtensions::instance(contextID,true);
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if(!extensions || !extensions->isSupported() ) return;
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const osg::Timer& timer = *osg::Timer::instance();
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osg::Timer_t start_tick = timer.tick();
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double elapsedTime = 0.0;
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_mutex_deletedRenderBufferCache);
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RenderBufferHandleList& pList = s_deletedRenderBufferCache[contextID];
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for(RenderBufferHandleList::iterator titr=pList.begin();
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titr!=pList.end() && elapsedTime<availableTime;
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)
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{
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extensions->glDeleteRenderbuffersEXT(1, &(*titr) );
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titr = pList.erase( titr );
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elapsedTime = timer.delta_s(start_tick,timer.tick());
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}
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}
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availableTime -= elapsedTime;
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}
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void RenderBuffer::discardDeletedRenderBuffers(unsigned int contextID)
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{
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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_mutex_deletedRenderBufferCache);
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RenderBufferHandleList& pList = s_deletedRenderBufferCache[contextID];
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pList.clear();
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}
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RenderBuffer::RenderBuffer()
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: Object(),
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_internalFormat(GL_DEPTH_COMPONENT24),
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_width(512),
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_height(512),
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_samples(0),
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_colorSamples(0)
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{
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}
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RenderBuffer::RenderBuffer(int width, int height, GLenum internalFormat, int samples, int colorSamples)
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: Object(),
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_internalFormat(internalFormat),
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_width(width),
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_height(height),
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_samples(samples),
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_colorSamples(colorSamples)
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{
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}
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RenderBuffer::RenderBuffer(const RenderBuffer ©, const CopyOp ©op)
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: Object(copy, copyop),
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_internalFormat(copy._internalFormat),
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_width(copy._width),
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_height(copy._height),
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_samples(copy._samples),
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_colorSamples(copy._colorSamples)
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{
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}
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RenderBuffer::~RenderBuffer()
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{
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for(unsigned i=0; i<_objectID.size(); ++i)
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{
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if (_objectID[i]) deleteRenderBuffer(i, _objectID[i]);
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}
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}
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int RenderBuffer::getMaxSamples(unsigned int contextID, const FBOExtensions *ext)
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{
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static osg::buffered_value<GLint> maxSamplesList;
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GLint& maxSamples = maxSamplesList[contextID];
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if (!maxSamples && ext->isMultisampleSupported())
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{
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glGetIntegerv(GL_MAX_SAMPLES_EXT, &maxSamples);
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}
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return maxSamples;
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}
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GLuint RenderBuffer::getObjectID(unsigned int contextID, const FBOExtensions *ext) const
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{
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GLuint &objectID = _objectID[contextID];
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int &dirty = _dirty[contextID];
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if (objectID == 0)
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{
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ext->glGenRenderbuffersEXT(1, &objectID);
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if (objectID == 0)
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return 0;
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dirty = 1;
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}
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if (dirty)
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{
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// bind and configure
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ext->glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, objectID);
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// framebuffer_multisample_coverage specification requires that coverage
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// samples must be >= color samples.
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if (_samples < _colorSamples)
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{
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notify(WARN) << "Coverage samples must be greater than or equal to color samples."
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" Setting coverage samples equal to color samples." << std::endl;
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const_cast<RenderBuffer*>(this)->setSamples(_colorSamples);
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}
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if (_samples > 0 && ext->isMultisampleCoverageSupported())
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{
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int samples = minimum(_samples, getMaxSamples(contextID, ext));
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int colorSamples = minimum(_colorSamples, samples);
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ext->glRenderbufferStorageMultisampleCoverageNV(GL_RENDERBUFFER_EXT,
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samples, colorSamples, _internalFormat, _width, _height);
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}
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else if (_samples > 0 && ext->isMultisampleSupported())
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{
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int samples = minimum(_samples, getMaxSamples(contextID, ext));
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ext->glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT,
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samples, _internalFormat, _width, _height);
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}
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else
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{
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ext->glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, _internalFormat, _width, _height);
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}
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dirty = 0;
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}
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return objectID;
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}
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/**************************************************************************
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* FrameBufferAttachment
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**************************************************************************/
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#ifndef GL_TEXTURE_CUBE_MAP_POSITIVE_X
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#define GL_TEXTURE_CUBE_MAP_POSITIVE_X 0x8515
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#endif
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struct FrameBufferAttachment::Pimpl
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{
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enum TargetType
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{
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RENDERBUFFER,
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TEXTURE1D,
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TEXTURE2D,
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TEXTURE3D,
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TEXTURECUBE,
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TEXTURERECT,
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TEXTURE2DARRAY
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};
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TargetType targetType;
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ref_ptr<RenderBuffer> renderbufferTarget;
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ref_ptr<Texture> textureTarget;
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int cubeMapFace;
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int level;
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int zoffset;
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explicit Pimpl(TargetType ttype = RENDERBUFFER, int lev = 0)
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: targetType(ttype),
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cubeMapFace(0),
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level(lev),
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zoffset(0)
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{
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}
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Pimpl(const Pimpl ©)
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: targetType(copy.targetType),
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renderbufferTarget(copy.renderbufferTarget),
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textureTarget(copy.textureTarget),
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cubeMapFace(copy.cubeMapFace),
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level(copy.level),
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zoffset(copy.zoffset)
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{
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}
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};
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FrameBufferAttachment::FrameBufferAttachment()
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{
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_ximpl = new Pimpl;
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}
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FrameBufferAttachment::FrameBufferAttachment(const FrameBufferAttachment ©)
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{
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_ximpl = new Pimpl(*copy._ximpl);
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}
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FrameBufferAttachment::FrameBufferAttachment(RenderBuffer* target)
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{
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_ximpl = new Pimpl(Pimpl::RENDERBUFFER);
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_ximpl->renderbufferTarget = target;
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}
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FrameBufferAttachment::FrameBufferAttachment(Texture1D* target, int level)
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{
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_ximpl = new Pimpl(Pimpl::TEXTURE1D, level);
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_ximpl->textureTarget = target;
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}
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FrameBufferAttachment::FrameBufferAttachment(Texture2D* target, int level)
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{
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_ximpl = new Pimpl(Pimpl::TEXTURE2D, level);
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_ximpl->textureTarget = target;
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}
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FrameBufferAttachment::FrameBufferAttachment(Texture3D* target, int zoffset, int level)
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{
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_ximpl = new Pimpl(Pimpl::TEXTURE3D, level);
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_ximpl->textureTarget = target;
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_ximpl->zoffset = zoffset;
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}
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FrameBufferAttachment::FrameBufferAttachment(Texture2DArray* target, int layer, int level)
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{
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_ximpl = new Pimpl(Pimpl::TEXTURE2DARRAY, level);
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_ximpl->textureTarget = target;
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_ximpl->zoffset = layer;
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}
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FrameBufferAttachment::FrameBufferAttachment(TextureCubeMap* target, int face, int level)
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{
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_ximpl = new Pimpl(Pimpl::TEXTURECUBE, level);
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_ximpl->textureTarget = target;
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_ximpl->cubeMapFace = face;
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}
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FrameBufferAttachment::FrameBufferAttachment(TextureRectangle* target)
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{
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_ximpl = new Pimpl(Pimpl::TEXTURERECT);
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_ximpl->textureTarget = target;
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}
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FrameBufferAttachment::FrameBufferAttachment(Camera::Attachment& attachment)
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{
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osg::Texture* texture = attachment._texture.get();
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if (texture)
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{
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osg::Texture1D* texture1D = dynamic_cast<osg::Texture1D*>(texture);
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if (texture1D)
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{
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_ximpl = new Pimpl(Pimpl::TEXTURE1D, attachment._level);
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_ximpl->textureTarget = texture1D;
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return;
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}
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osg::Texture2D* texture2D = dynamic_cast<osg::Texture2D*>(texture);
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if (texture2D)
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{
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_ximpl = new Pimpl(Pimpl::TEXTURE2D, attachment._level);
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_ximpl->textureTarget = texture2D;
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return;
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}
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osg::Texture3D* texture3D = dynamic_cast<osg::Texture3D*>(texture);
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if (texture3D)
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{
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_ximpl = new Pimpl(Pimpl::TEXTURE3D, attachment._level);
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_ximpl->textureTarget = texture3D;
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_ximpl->zoffset = attachment._face;
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return;
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}
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osg::Texture2DArray* texture2DArray = dynamic_cast<osg::Texture2DArray*>(texture);
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if (texture2DArray)
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{
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_ximpl = new Pimpl(Pimpl::TEXTURE2DARRAY, attachment._level);
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_ximpl->textureTarget = texture2DArray;
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_ximpl->zoffset = attachment._face;
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return;
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}
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osg::TextureCubeMap* textureCubeMap = dynamic_cast<osg::TextureCubeMap*>(texture);
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if (textureCubeMap)
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{
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_ximpl = new Pimpl(Pimpl::TEXTURECUBE, attachment._level);
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_ximpl->textureTarget = textureCubeMap;
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_ximpl->cubeMapFace = attachment._face;
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return;
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}
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osg::TextureRectangle* textureRectangle = dynamic_cast<osg::TextureRectangle*>(texture);
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if (textureRectangle)
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{
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_ximpl = new Pimpl(Pimpl::TEXTURERECT);
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_ximpl->textureTarget = textureRectangle;
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return;
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}
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}
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osg::Image* image = attachment._image.get();
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if (image)
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{
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if (image->s()>0 && image->t()>0)
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{
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GLenum format = attachment._image->getInternalTextureFormat();
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if (format == 0)
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format = attachment._internalFormat;
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_ximpl = new Pimpl(Pimpl::RENDERBUFFER);
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_ximpl->renderbufferTarget = new osg::RenderBuffer(image->s(), image->t(), format);
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}
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else
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{
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osg::notify(osg::WARN)<<"Error: FrameBufferAttachment::FrameBufferAttachment(Camera::Attachment&) passed an empty osg::Image, image must be allocated first."<<std::endl;
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}
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return;
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}
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osg::notify(osg::WARN)<<"Error: FrameBufferAttachment::FrameBufferAttachment(Camera::Attachment&) passed an unrecognised Texture type."<<std::endl;
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}
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FrameBufferAttachment::~FrameBufferAttachment()
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{
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delete _ximpl;
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}
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FrameBufferAttachment &FrameBufferAttachment::operator = (const FrameBufferAttachment ©)
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{
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delete _ximpl;
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_ximpl = new Pimpl(*copy._ximpl);
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return *this;
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}
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bool FrameBufferAttachment::isMultisample() const
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{
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if (_ximpl->renderbufferTarget.valid())
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{
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return _ximpl->renderbufferTarget->getSamples() > 0;
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}
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return false;
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}
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void FrameBufferAttachment::createRequiredTexturesAndApplyGenerateMipMap(State &state, const FBOExtensions* ext) const
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{
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unsigned int contextID = state.getContextID();
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// force compile texture if necessary
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Texture::TextureObject *tobj = 0;
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if (_ximpl->textureTarget.valid())
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{
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tobj = _ximpl->textureTarget->getTextureObject(contextID);
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if (!tobj || tobj->_id == 0)
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{
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_ximpl->textureTarget->compileGLObjects(state);
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tobj = _ximpl->textureTarget->getTextureObject(contextID);
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}
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if (!tobj || tobj->_id == 0)
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return;
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Texture::FilterMode minFilter = _ximpl->textureTarget->getFilter(Texture::MIN_FILTER);
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if (minFilter==Texture::LINEAR_MIPMAP_LINEAR ||
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minFilter==Texture::LINEAR_MIPMAP_NEAREST ||
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minFilter==Texture::NEAREST_MIPMAP_LINEAR ||
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minFilter==Texture::NEAREST_MIPMAP_NEAREST)
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{
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state.setActiveTextureUnit(0);
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state.applyTextureAttribute(0, _ximpl->textureTarget.get());
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ext->glGenerateMipmapEXT(_ximpl->textureTarget->getTextureTarget());
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}
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}
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}
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void FrameBufferAttachment::attach(State &state, GLenum target, GLenum attachment_point, const FBOExtensions* ext) const
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{
|
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unsigned int contextID = state.getContextID();
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Texture::TextureObject *tobj = 0;
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if (_ximpl->textureTarget.valid())
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{
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tobj = _ximpl->textureTarget->getTextureObject(contextID);
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if (!tobj || tobj->_id == 0)
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{
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_ximpl->textureTarget->compileGLObjects(state);
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tobj = _ximpl->textureTarget->getTextureObject(contextID);
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}
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if (!tobj || tobj->_id == 0)
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return;
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}
|
|
|
|
switch (_ximpl->targetType)
|
|
{
|
|
default:
|
|
case Pimpl::RENDERBUFFER:
|
|
ext->glFramebufferRenderbufferEXT(target, attachment_point, GL_RENDERBUFFER_EXT, _ximpl->renderbufferTarget->getObjectID(contextID, ext));
|
|
break;
|
|
case Pimpl::TEXTURE1D:
|
|
ext->glFramebufferTexture1DEXT(target, attachment_point, GL_TEXTURE_1D, tobj->_id, _ximpl->level);
|
|
break;
|
|
case Pimpl::TEXTURE2D:
|
|
ext->glFramebufferTexture2DEXT(target, attachment_point, GL_TEXTURE_2D, tobj->_id, _ximpl->level);
|
|
break;
|
|
case Pimpl::TEXTURE3D:
|
|
ext->glFramebufferTexture3DEXT(target, attachment_point, GL_TEXTURE_3D, tobj->_id, _ximpl->level, _ximpl->zoffset);
|
|
break;
|
|
case Pimpl::TEXTURE2DARRAY:
|
|
ext->glFramebufferTextureLayerEXT(target, attachment_point, tobj->_id, _ximpl->level, _ximpl->zoffset);
|
|
break;
|
|
case Pimpl::TEXTURERECT:
|
|
ext->glFramebufferTexture2DEXT(target, attachment_point, GL_TEXTURE_RECTANGLE, tobj->_id, 0);
|
|
break;
|
|
case Pimpl::TEXTURECUBE:
|
|
ext->glFramebufferTexture2DEXT(target, attachment_point, GL_TEXTURE_CUBE_MAP_POSITIVE_X + _ximpl->cubeMapFace, tobj->_id, _ximpl->level);
|
|
break;
|
|
}
|
|
}
|
|
|
|
int FrameBufferAttachment::compare(const FrameBufferAttachment &fa) const
|
|
{
|
|
if (&fa == this) return 0;
|
|
if (_ximpl->targetType < fa._ximpl->targetType) return -1;
|
|
if (_ximpl->targetType > fa._ximpl->targetType) return 1;
|
|
if (_ximpl->renderbufferTarget.get() < fa._ximpl->renderbufferTarget.get()) return -1;
|
|
if (_ximpl->renderbufferTarget.get() > fa._ximpl->renderbufferTarget.get()) return 1;
|
|
if (_ximpl->textureTarget.get() < fa._ximpl->textureTarget.get()) return -1;
|
|
if (_ximpl->textureTarget.get() > fa._ximpl->textureTarget.get()) return 1;
|
|
if (_ximpl->cubeMapFace < fa._ximpl->cubeMapFace) return -1;
|
|
if (_ximpl->cubeMapFace > fa._ximpl->cubeMapFace) return 1;
|
|
if (_ximpl->level < fa._ximpl->level) return -1;
|
|
if (_ximpl->level > fa._ximpl->level) return 1;
|
|
if (_ximpl->zoffset < fa._ximpl->zoffset) return -1;
|
|
if (_ximpl->zoffset > fa._ximpl->zoffset) return 1;
|
|
return 0;
|
|
}
|
|
|
|
/**************************************************************************
|
|
* FrameBufferObject
|
|
**************************************************************************/
|
|
|
|
///////////////////////////////////////////////////////////////////////////
|
|
// static cache of glRenderbuffers flagged for deletion, which will actually
|
|
// be deleted in the correct GL context.
|
|
|
|
typedef std::list<GLuint> FrameBufferObjectHandleList;
|
|
typedef osg::buffered_object<FrameBufferObjectHandleList> DeletedFrameBufferObjectCache;
|
|
|
|
static OpenThreads::Mutex s_mutex_deletedFrameBufferObjectCache;
|
|
static DeletedFrameBufferObjectCache s_deletedFrameBufferObjectCache;
|
|
|
|
void FrameBufferObject::deleteFrameBufferObject(unsigned int contextID, GLuint rb)
|
|
{
|
|
if( rb )
|
|
{
|
|
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_mutex_deletedFrameBufferObjectCache);
|
|
|
|
// add glProgram to the cache for the appropriate context.
|
|
s_deletedFrameBufferObjectCache[contextID].push_back(rb);
|
|
}
|
|
}
|
|
|
|
void FrameBufferObject::flushDeletedFrameBufferObjects(unsigned int contextID,double /*currentTime*/, double& availableTime)
|
|
{
|
|
// if no time available don't try to flush objects.
|
|
if (availableTime<=0.0) return;
|
|
|
|
const FBOExtensions* extensions = FBOExtensions::instance(contextID,true);
|
|
if(!extensions || !extensions->isSupported() ) return;
|
|
|
|
const osg::Timer& timer = *osg::Timer::instance();
|
|
osg::Timer_t start_tick = timer.tick();
|
|
double elapsedTime = 0.0;
|
|
|
|
{
|
|
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_mutex_deletedFrameBufferObjectCache);
|
|
|
|
FrameBufferObjectHandleList& pList = s_deletedFrameBufferObjectCache[contextID];
|
|
for(FrameBufferObjectHandleList::iterator titr=pList.begin();
|
|
titr!=pList.end() && elapsedTime<availableTime;
|
|
)
|
|
{
|
|
extensions->glDeleteFramebuffersEXT(1, &(*titr) );
|
|
titr = pList.erase( titr );
|
|
elapsedTime = timer.delta_s(start_tick,timer.tick());
|
|
}
|
|
}
|
|
|
|
availableTime -= elapsedTime;
|
|
}
|
|
|
|
void FrameBufferObject::discardDeletedFrameBufferObjects(unsigned int contextID)
|
|
{
|
|
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_mutex_deletedFrameBufferObjectCache);
|
|
FrameBufferObjectHandleList& pList = s_deletedFrameBufferObjectCache[contextID];
|
|
|
|
pList.clear();
|
|
}
|
|
|
|
|
|
|
|
FrameBufferObject::FrameBufferObject()
|
|
: StateAttribute()
|
|
{
|
|
}
|
|
|
|
FrameBufferObject::FrameBufferObject(const FrameBufferObject ©, const CopyOp ©op)
|
|
: StateAttribute(copy, copyop),
|
|
_attachments(copy._attachments),
|
|
_drawBuffers(copy._drawBuffers)
|
|
{
|
|
}
|
|
|
|
FrameBufferObject::~FrameBufferObject()
|
|
{
|
|
for(unsigned i=0; i<_fboID.size(); ++i)
|
|
{
|
|
if (_fboID[i]) deleteFrameBufferObject(i, _fboID[i]);
|
|
}
|
|
}
|
|
|
|
void FrameBufferObject::setAttachment(GLenum attachment_point, const FrameBufferAttachment &attachment)
|
|
{
|
|
setAttachment(convertGLenumToBufferComponent(attachment_point),attachment);
|
|
}
|
|
|
|
void FrameBufferObject::setAttachment(BufferComponent attachment_point, const FrameBufferAttachment &attachment)
|
|
{
|
|
GLenum gl_attachment = convertBufferComponentToGLenum(attachment_point);
|
|
_attachments[attachment_point] = attachment;
|
|
|
|
updateDrawBuffers();
|
|
dirtyAll();
|
|
}
|
|
|
|
|
|
GLenum FrameBufferObject::convertBufferComponentToGLenum(BufferComponent attachment_point) const
|
|
{
|
|
switch(attachment_point)
|
|
{
|
|
case(Camera::DEPTH_BUFFER): return GL_DEPTH_ATTACHMENT_EXT;
|
|
case(Camera::STENCIL_BUFFER): return GL_STENCIL_ATTACHMENT_EXT;
|
|
case(Camera::COLOR_BUFFER): return GL_COLOR_ATTACHMENT0_EXT;
|
|
default: return GLenum(GL_COLOR_ATTACHMENT0_EXT + (attachment_point-Camera::COLOR_BUFFER0));
|
|
}
|
|
}
|
|
|
|
FrameBufferObject::BufferComponent FrameBufferObject::convertGLenumToBufferComponent(GLenum attachment_point) const
|
|
{
|
|
switch(attachment_point)
|
|
{
|
|
case(GL_DEPTH_ATTACHMENT_EXT): return Camera::DEPTH_BUFFER;
|
|
case(GL_STENCIL_ATTACHMENT_EXT): return Camera::STENCIL_BUFFER;
|
|
case(GL_COLOR_ATTACHMENT0_EXT): return Camera::COLOR_BUFFER;
|
|
default: return BufferComponent(Camera::COLOR_BUFFER0+(attachment_point-GL_COLOR_ATTACHMENT0_EXT));
|
|
}
|
|
}
|
|
|
|
void FrameBufferObject::updateDrawBuffers()
|
|
{
|
|
_drawBuffers.clear();
|
|
|
|
// create textures and mipmaps before we bind the frame buffer object
|
|
for (AttachmentMap::const_iterator i=_attachments.begin(); i!=_attachments.end(); ++i)
|
|
{
|
|
const FrameBufferAttachment &fa = i->second;
|
|
|
|
// setup draw buffers based on the attachment definition
|
|
if (i->first >= Camera::COLOR_BUFFER0 && i->first <= Camera::COLOR_BUFFER15)
|
|
_drawBuffers.push_back(convertBufferComponentToGLenum(i->first));
|
|
}
|
|
}
|
|
|
|
void FrameBufferObject::apply(State &state) const
|
|
{
|
|
apply(state, READ_DRAW_FRAMEBUFFER);
|
|
}
|
|
|
|
void FrameBufferObject::apply(State &state, BindTarget target) const
|
|
{
|
|
unsigned int contextID = state.getContextID();
|
|
|
|
if (_unsupported[contextID])
|
|
return;
|
|
|
|
|
|
FBOExtensions* ext = FBOExtensions::instance(contextID,true);
|
|
if (!ext->isSupported())
|
|
{
|
|
_unsupported[contextID] = 1;
|
|
notify(WARN) << "Warning: EXT_framebuffer_object is not supported" << std::endl;
|
|
return;
|
|
}
|
|
|
|
if (_attachments.empty())
|
|
{
|
|
ext->glBindFramebufferEXT(target, 0);
|
|
return;
|
|
}
|
|
|
|
int &dirtyAttachmentList = _dirtyAttachmentList[contextID];
|
|
|
|
GLuint &fboID = _fboID[contextID];
|
|
if (fboID == 0)
|
|
{
|
|
ext->glGenFramebuffersEXT(1, &fboID);
|
|
if (fboID == 0)
|
|
{
|
|
notify(WARN) << "Warning: FrameBufferObject: could not create the FBO" << std::endl;
|
|
return;
|
|
}
|
|
|
|
dirtyAttachmentList = 1;
|
|
|
|
}
|
|
|
|
if (dirtyAttachmentList)
|
|
{
|
|
// the set of of attachments appears to be thread sensitive, it shouldn't be because
|
|
// OpenGL FBO handles osg::FrameBufferObject has are multi-buffered...
|
|
// so as a temporary fix will stick in a mutex to ensure that only one thread passes through here
|
|
// at one time.
|
|
static OpenThreads::Mutex s_mutex;
|
|
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(s_mutex);
|
|
|
|
// create textures and mipmaps before we bind the frame buffer object
|
|
for (AttachmentMap::const_iterator i=_attachments.begin(); i!=_attachments.end(); ++i)
|
|
{
|
|
const FrameBufferAttachment &fa = i->second;
|
|
fa.createRequiredTexturesAndApplyGenerateMipMap(state, ext);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
ext->glBindFramebufferEXT(target, fboID);
|
|
|
|
// enable drawing buffers to render the result to fbo
|
|
if (_drawBuffers.size() > 0)
|
|
{
|
|
GL2Extensions *gl2e = GL2Extensions::Get(state.getContextID(), true );
|
|
if (gl2e)
|
|
{
|
|
gl2e->glDrawBuffers(_drawBuffers.size(), &(_drawBuffers[0]));
|
|
}
|
|
}
|
|
|
|
if (dirtyAttachmentList)
|
|
{
|
|
for (AttachmentMap::const_iterator i=_attachments.begin(); i!=_attachments.end(); ++i)
|
|
{
|
|
const FrameBufferAttachment &fa = i->second;
|
|
fa.attach(state, target, convertBufferComponentToGLenum(i->first), ext);
|
|
}
|
|
dirtyAttachmentList = 0;
|
|
}
|
|
|
|
}
|
|
|
|
bool FrameBufferObject::isMultisample() const
|
|
{
|
|
if (_attachments.size())
|
|
{
|
|
// If the FBO is correctly set up then all attachments will be either
|
|
// multisampled or single sampled. Therefore we can just return the
|
|
// result of the first attachment.
|
|
return _attachments.begin()->second.isMultisample();
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
int FrameBufferObject::compare(const StateAttribute &sa) const
|
|
{
|
|
COMPARE_StateAttribute_Types(FrameBufferObject, sa);
|
|
COMPARE_StateAttribute_Parameter(_attachments.size());
|
|
AttachmentMap::const_iterator i = _attachments.begin();
|
|
AttachmentMap::const_iterator j = rhs._attachments.begin();
|
|
for (; i!=_attachments.end(); ++i, ++j)
|
|
{
|
|
int cmp = i->second.compare(j->second);
|
|
if (cmp != 0) return cmp;
|
|
}
|
|
return 0;
|
|
}
|