Source/System/Window/Background/OSGFBOBackground.cpp

   1 /*---------------------------------------------------------------------------*\
   2  *                                OpenSG                                     *
   3  *                                                                           *
   4  *                                                                           *
   5  *             Copyright (C) 2000-2002 by the OpenSG Forum                   *
   6  *                                                                           *
   7  *                            www.opensg.org                                 *
   8  *                                                                           *
   9  *   contact: dirk@opensg.org, gerrit.voss@vossg.org, jbehr@zgdv.de          *
  10  *                                                                           *
  11 \*---------------------------------------------------------------------------*/
  12 /*---------------------------------------------------------------------------*\
  13  *                                License                                    *
  14  *                                                                           *
  15  * This library is free software; you can redistribute it and/or modify it   *
  16  * under the terms of the GNU Library General Public License as published    *
  17  * by the Free Software Foundation, version 2.                               *
  18  *                                                                           *
  19  * This library is distributed in the hope that it will be useful, but       *
  20  * WITHOUT ANY WARRANTY; without even the implied warranty of                *
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
  22  * Library General Public License for more details.                          *
  23  *                                                                           *
  24  * You should have received a copy of the GNU Library General Public         *
  25  * License along with this library; if not, write to the Free Software       *
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                 *
  27  *                                                                           *
  28 \*---------------------------------------------------------------------------*/
  29 /*---------------------------------------------------------------------------*\
  30  *                                Changes                                    *
  31  *                                                                           *
  32  *                                                                           *
  33  *                                                                           *
  34  *                                                                           *
  35  *                                                                           *
  36  *                                                                           *
  37 \*---------------------------------------------------------------------------*/
  38
  39 //---------------------------------------------------------------------------
  40 //  Includes
  41 //---------------------------------------------------------------------------
  42
  43 #include <stdlib.h>
  44 #include <stdio.h>
  45
  46 #include "OSGConfig.h"
  47
  48 #include "OSGGL.h"
  49 #include "OSGGLFuncProtos.h"
  50
  51 #include "OSGFieldContainer.h"
  52 #include "OSGNode.h"
  53 #include "OSGAction.h"
  54 #include "OSGViewport.h"
  55 #include "OSGCamera.h"
  56 #include "OSGWindow.h"
  57 #include "OSGBackground.h"
  58 #include "OSGFBOBackground.h"
  59 #include "OSGFrameBufferObject.h"
  60
  61 OSG_BEGIN_NAMESPACE
  62
  63 UInt32 FBOBackground::_uiFramebufferObjectExt  =
  64     Window::invalidExtensionID;
  65
  66 UInt32 FBOBackground::_uiFramebufferBlitExt    =
  67     Window::invalidExtensionID;
  68
  69 UInt32 FBOBackground::_uiFuncBindFramebuffer   =
  70     Window::invalidFunctionID;
  71
  72 UInt32 FBOBackground::_uiFuncBlitFramebuffer   =
  73     Window::invalidFunctionID;
  74
  75 /***************************************************************************\
  76  *                            Description                                  *
  77 \***************************************************************************/
  78
  79 /*! \class OSG::FBOBackground
  80     \ingroup GrpSystemWindowBackgrounds
  81
  82 A FBO background, see \ref PageSystemWindowBackgroundFBO for a
  83 description.
  84
  85 */
  86 /***************************************************************************\
  87  *                           Class methods                                 *
  88 \***************************************************************************/
  89
  90 /*-------------------------------------------------------------------------*\
  91  -  private                                                                -
  92 \*-------------------------------------------------------------------------*/
  93
  94 void FBOBackground::initMethod (InitPhase ePhase)
  95 {
  96     Inherited::initMethod(ePhase);
  97
  98     if(ePhase == TypeObject::SystemPost)
  99     {
 100         _uiFramebufferObjectExt   =
 101             Window::registerExtension("GL_EXT_framebuffer_object");
 102         _uiFramebufferBlitExt   =
 103             Window::registerExtension("GL_EXT_framebuffer_blit");
 104
 105         _uiFuncBindFramebuffer          =
 106             Window::registerFunction (
 107                  OSG_DLSYM_UNDERSCORE"glBindFramebufferEXT",
 108                 _uiFramebufferObjectExt);
 109
 110         _uiFuncBlitFramebuffer  =
 111             Window::registerFunction (
 112                  OSG_DLSYM_UNDERSCORE"glBlitFramebufferEXT",
 113                 _uiFramebufferBlitExt);
 114     }
 115 }
 116
 117 /***************************************************************************\
 118  *                           Instance methods                              *
 119 \***************************************************************************/
 120
 121 FBOBackground::FBOBackground(void) :
 122     Inherited()
 123 {
 124 }
 125
 126 FBOBackground::FBOBackground(const FBOBackground &source) :
 127     Inherited(source)
 128 {
 129 }
 130
 131 FBOBackground::~FBOBackground(void)
 132 {
 133 }
 134
 135 void FBOBackground::changed(ConstFieldMaskArg whichField,
 136                             UInt32            origin,
 137                             BitVector         details)
 138 {
 139     Inherited::changed(whichField, origin, details);
 140 }
 141
 142 /*-------------------------- your_category---------------------------------*/
 143
 144 void FBOBackground::clear(DrawEnv *pEnv)
 145 {
 146     if(_sfFrameBufferObject.getValue() != NULL)
 147     {
 148         Window *win = pEnv->getWindow();
 149
 150         OSGGETGLFUNCBYID_GL3_ES( glBindFramebuffer,
 151                                  osgGlBindFramebuffer,
 152                                 _uiFuncBindFramebuffer,
 153                                  win                  );
 154
 155         OSGGETGLFUNCBYID_GL3( glBlitFramebuffer,
 156                               osgGlBlitFramebuffer,
 157                              _uiFuncBlitFramebuffer,
 158                               win                  );
 159
 160         osgGlBindFramebuffer(
 161             GL_READ_FRAMEBUFFER_EXT,
 162             win->getGLObjectId(_sfFrameBufferObject.getValue()->getGLId()));
 163
 164         osgGlBlitFramebuffer(
 165              0,
 166              0,
 167             _sfFrameBufferObject.getValue()->getWidth (),
 168             _sfFrameBufferObject.getValue()->getHeight(),
 169
 170             pEnv->getPixelLeft  (),
 171             pEnv->getPixelBottom(),
 172             pEnv->getPixelRight () + 1,
 173             pEnv->getPixelTop   () + 1,
 174
 175             (GL_COLOR_BUFFER_BIT  |
 176              GL_DEPTH_BUFFER_BIT  |
 177              GL_STENCIL_BUFFER_BIT),
 178             GL_NEAREST);
 179
 180         if(pEnv->getActiveFBO() != 0)
 181         {
 182             osgGlBindFramebuffer(GL_READ_FRAMEBUFFER_EXT,
 183                                  win->getGLObjectId(pEnv->getActiveFBO()));
 184         }
 185         else
 186         {
 187             osgGlBindFramebuffer(GL_READ_FRAMEBUFFER_EXT,
 188                                  0                      );
 189         }
 190     }
 191 }
 192
 193 /*------------------------------- dump ----------------------------------*/
 194
 195 void FBOBackground::dump(      UInt32    OSG_CHECK_ARG(uiIndent),
 196                          const BitVector OSG_CHECK_ARG(bvFlags )) const
 197 {
 198     SLOG << "Dump FBOBackground NI" << std::endl;
 199 }
 200
 201 OSG_END_NAMESPACE