Source/System/State/Base/OSGDepthChunk.cpp

   1 /*---------------------------------------------------------------------------*\
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  29 /*---------------------------------------------------------------------------*\
  30  *                                Changes                                    *
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  37 \*---------------------------------------------------------------------------*/
  38
  39 //---------------------------------------------------------------------------
  40 //  Includes
  41 //---------------------------------------------------------------------------
  42
  43 #include <cstdlib>
  44 #include <cstdio>
  45
  46 #include "OSGConfig.h"
  47
  48 #include "OSGGL.h"
  49
  50 #include "OSGWindow.h"
  51
  52 #include "OSGDepthChunk.h"
  53
  54 OSG_USING_NAMESPACE
  55
  56 // Documentation for this class is emited in the
  57 // OSGDepthChunkBase.cpp file.
  58 // To modify it, please change the .fcd file (OSGDepthChunk.fcd) and
  59 // regenerate the base file.
  60
  61 /***************************************************************************\
  62  *                           Class variables                               *
  63 \***************************************************************************/
  64
  65 StateChunkClass DepthChunk::_class("Depth", 1, 50);
  66
  67 /***************************************************************************\
  68  *                           Class methods                                 *
  69 \***************************************************************************/
  70
  71 void DepthChunk::initMethod(InitPhase ePhase)
  72 {
  73     Inherited::initMethod(ePhase);
  74 }
  75
  76
  77 /***************************************************************************\
  78  *                           Instance methods                              *
  79 \***************************************************************************/
  80
  81 /*-------------------------------------------------------------------------*\
  82  -  private                                                                 -
  83 \*-------------------------------------------------------------------------*/
  84
  85 /*----------------------- constructors & destructors ----------------------*/
  86
  87 DepthChunk::DepthChunk(void) :
  88     Inherited()
  89 {
  90 }
  91
  92 DepthChunk::DepthChunk(const DepthChunk &source) :
  93     Inherited(source)
  94 {
  95 }
  96
  97 DepthChunk::~DepthChunk(void)
  98 {
  99 }
 100
 101 /*------------------------- Chunk Class Access ---------------------------*/
 102
 103 const StateChunkClass *DepthChunk::getClass(void) const
 104 {
 105     return &_class;
 106 }
 107
 108 /*----------------------------- class specific ----------------------------*/
 109
 110 void DepthChunk::changed(ConstFieldMaskArg whichField,
 111                          UInt32            origin,
 112                          BitVector         details)
 113 {
 114     Inherited::changed(whichField, origin, details);
 115 }
 116
 117 void DepthChunk::dump(      UInt32    ,
 118                       const BitVector ) const
 119 {
 120     SLOG << "Dump DepthChunk NI" << std::endl;
 121 }
 122
 123
 124 /*------------------------------ State ------------------------------------*/
 125
 126 void DepthChunk::activate(DrawEnv *pEnv, UInt32)
 127 {
 128     pEnv->incNumChunkChanges();
 129
 130     if(_sfFunc.getValue() != GL_NONE)
 131     {
 132         glDepthFunc(_sfFunc.getValue());
 133     }
 134
 135 #ifndef OSG_OGL_ES2
 136     if(getNear() >= 0 && getFar() >= 0)
 137     {
 138         glDepthRange(getNear(), getFar());
 139     }
 140 #endif
 141
 142     if(getEnable())
 143     {
 144         glEnable(GL_DEPTH_TEST);
 145     }
 146     else
 147     {
 148         glDisable(GL_DEPTH_TEST);
 149     }
 150
 151     glDepthMask(!getReadOnly());
 152 }
 153
 154 void DepthChunk::changeFrom(DrawEnv    *pEnv,
 155                             StateChunk *old_chunk,
 156                             UInt32      index    )
 157 {
 158     old_chunk->deactivate(pEnv, index);
 159
 160     activate(pEnv, index);
 161 }
 162
 163 void DepthChunk::deactivate(DrawEnv *, UInt32)
 164 {
 165     if(_sfFunc.getValue() != GL_NONE)
 166     {
 167         glDepthFunc(GL_LEQUAL);
 168     }
 169
 170 #ifndef OSG_OGL_ES2
 171     if(getNear() >= 0 && getFar() >= 0)
 172     {
 173         glDepthRange(0, 1);
 174     }
 175 #endif
 176
 177     if(!getEnable())
 178     {
 179         glEnable(GL_DEPTH_TEST);
 180     }
 181
 182     glDepthMask(GL_TRUE);
 183 }
 184
 185 /*-------------------------- Comparison -----------------------------------*/
 186
 187 Real32 DepthChunk::switchCost(StateChunk *)
 188 {
 189     return 0;
 190 }
 191
 192 /** \brief assignment
 193  */
 194
 195 bool DepthChunk::operator < (const StateChunk &other) const
 196 {
 197     return this < &other;
 198 }
 199
 200 /** \brief equal
 201  */
 202
 203 bool DepthChunk::operator == (const StateChunk &other) const
 204 {
 205     DepthChunk const *tother = dynamic_cast<DepthChunk const*>(&other);
 206
 207     if(!tother)
 208         return false;
 209
 210     if(tother == this)
 211         return true;
 212
 213     if(getEnable()          != tother->getEnable()  ||
 214        getFunc()            != tother->getFunc()    ||
 215        getFar()             != tother->getFar()     ||
 216        getNear()            != tother->getNear()    ||
 217        getReadOnly()        != tother->getReadOnly() )
 218     {
 219         return false;
 220     }
 221
 222     return true;
 223 }
 224
 225 /** \brief unequal
 226  */
 227
 228 bool DepthChunk::operator != (const StateChunk &other) const
 229 {
 230     return ! (*this == other);
 231 }