Source/System/Window/Background/OSGPolygonBackground.cpp

   1 /*---------------------------------------------------------------------------*\
   2  *                                OpenSG                                     *
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   5  *               Copyright (C) 2000-2002 by the OpenSG Forum                 *
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  12 /*---------------------------------------------------------------------------*\
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  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.                               *
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  19  * This library is distributed in the hope that it will be useful, but       *
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  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
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  28 \*---------------------------------------------------------------------------*/
  29 /*---------------------------------------------------------------------------*\
  30  *                                Changes                                    *
  31  *                                                                           *
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  34  *                                                                           *
  35  *                                                                           *
  36  *                                                                           *
  37 \*---------------------------------------------------------------------------*/
  38
  39 //---------------------------------------------------------------------------
  40 //  Includes
  41 //---------------------------------------------------------------------------
  42
  43 #include <cstdlib>
  44 #include <cstdio>
  45
  46 #include "OSGConfig.h"
  47 #include "OSGMaterial.h"
  48 #include "OSGViewport.h"
  49
  50 #include "OSGPolygonBackground.h"
  51 #include "OSGTileCameraDecorator.h"
  52 #include "OSGDrawEnv.h"
  53 #include "OSGRenderActionBase.h"
  54 #include "OSGPrimeMaterial.h"
  55
  56 OSG_USING_NAMESPACE
  57
  58 // Documentation for this class is emited in the
  59 // OSGPolygonBackgroundBase.cpp file.
  60 // To modify it, please change the .fcd file (OSGPolygonBackground.fcd) and
  61 // regenerate the base file.
  62
  63 /***************************************************************************\
  64  *                           Class variables                               *
  65 \***************************************************************************/
  66
  67 /***************************************************************************\
  68  *                           Class methods                                 *
  69 \***************************************************************************/
  70
  71 void PolygonBackground::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 PolygonBackground::PolygonBackground(void) :
  88     Inherited()
  89 {
  90 }
  91
  92 PolygonBackground::PolygonBackground(const PolygonBackground &source) :
  93     Inherited(source)
  94 {
  95 }
  96
  97 PolygonBackground::~PolygonBackground(void)
  98 {
  99 }
 100
 101 /*----------------------------- class specific ----------------------------*/
 102
 103 void PolygonBackground::clear(DrawEnv *pEnv)
 104 {
 105 #if !defined(OSG_OGL_COREONLY) || defined(OSG_CHECK_COREONLY)
 106     if(pEnv->getPixelWidth()  == 0 ||
 107        pEnv->getPixelHeight() == 0 )
 108     {
 109         FWARNING(("Port has zero size: nothing to render to!\n"));
 110         return;
 111     }
 112
 113     if(getMFPositions()->size() == 0 ||
 114        getMFPositions()->size() != getMFTexCoords()->size())
 115     {
 116         FWARNING(("PolygonBackground::clear: positions and texcoords have "
 117                   "different/ invalid sizes (%" PRISize " vs. %" PRISize ")!\n",
 118                   getMFPositions()->size(), getMFTexCoords()->size()));
 119         return;
 120     }
 121
 122     Int32 bit = getClearStencilBit();      // 0x0
 123
 124     if(bit >= 0)
 125     {
 126         glClearStencil(bit);
 127
 128         glClear(GL_COLOR_BUFFER_BIT |
 129                 GL_DEPTH_BUFFER_BIT |
 130                 GL_STENCIL_BUFFER_BIT);
 131     }
 132     else
 133     {
 134         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 135     }
 136
 137     glPushAttrib(GL_ALL_ATTRIB_BITS);
 138
 139     glDisable(GL_DEPTH_TEST);
 140     glDepthFunc(GL_ALWAYS);
 141
 142     if(getCleanup())
 143         glDepthMask(GL_FALSE);
 144
 145     Real32 aspectX = 1.0f, aspectY = 1.0f;
 146
 147     if(getAspectHeight() != 0 && getAspectWidth() != 0)
 148     {
 149         aspectX = (Real32(pEnv->getPixelHeight()) / getAspectHeight()) /
 150                   (Real32(pEnv->getPixelWidth ()) / getAspectWidth ());
 151     }
 152
 153     Real32 sFac        = getScale() > 0 ? getScale() : 1.0f;
 154     UInt32 fullWidth;
 155     UInt32 fullHeight;
 156
 157     if(!getTile())
 158     {
 159         beginOrthoRender(pEnv, getNormalizedX(), getNormalizedY(),
 160                                fullWidth,        fullHeight       );
 161
 162         Real32 t = 0;
 163
 164         if(getAspectHeight() != 0 && getAspectWidth() != 0 &&
 165            fullHeight        != 0 && fullHeight       != 0   )
 166         {
 167             aspectX = (Real32(fullHeight) / getAspectHeight()) /
 168                       (Real32(fullWidth ) / getAspectWidth ());
 169
 170             t  = Real32(fullWidth) * (1.0f - aspectX) * 0.5f;
 171             t *= Real32(pEnv->getPixelWidth()) / fullWidth;
 172         }
 173
 174         glTranslatef(t,       0.0f,    0.0f);
 175         glScalef    (aspectX, aspectY, 1.0f);
 176
 177         Real32 tW = (1.0f - sFac) * 0.5f * Real32(pEnv->getPixelWidth ());
 178         Real32 tH = (1.0f - sFac) * 0.5f * Real32(pEnv->getPixelHeight());
 179
 180         glTranslatef(tW,   tH,   0.0f);
 181         glScalef    (sFac, sFac, 1.0f);
 182     }
 183     else
 184     {
 185         glScalef(sFac,    sFac,    1.0f);
 186         glScalef(aspectX, aspectY, 1.0f);
 187
 188         beginOrthoRender(pEnv, getNormalizedX(), getNormalizedY(),
 189                                fullWidth,        fullHeight       );
 190     }
 191
 192
 193     getMaterial()->getState()->activate(pEnv);
 194
 195     const Vec3f *tc  = &getMFTexCoords()->front();
 196     const Pnt2f *pos = &getMFPositions()->front();
 197
 198     glBegin(GL_POLYGON);
 199
 200     for (UInt16 i=0; i < getMFPositions()->size(); i++)
 201     {
 202         glTexCoord3fv( tc[i].getValues());
 203         glVertex2fv  (pos[i].getValues());
 204     }
 205
 206     glEnd();
 207
 208     getMaterial()->getState()->deactivate(pEnv);
 209
 210     glScalef(1, 1, 1);
 211
 212     if(getCleanup())
 213     {
 214         if(bit >= 0)
 215         {
 216             glClear(GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
 217         }
 218         else
 219         {
 220             glClear(GL_DEPTH_BUFFER_BIT);
 221         }
 222     }
 223
 224     endOrthoRender(pEnv);
 225
 226     glPopAttrib();
 227 #endif
 228 }
 229
 230 void PolygonBackground::changed(ConstFieldMaskArg whichField,
 231                                 UInt32            origin,
 232                                 BitVector         details)
 233 {
 234     Inherited::changed(whichField, origin, details);
 235 }
 236
 237 void PolygonBackground::dump(      UInt32    ,
 238                              const BitVector ) const
 239 {
 240     SLOG << "Dump PolygonBackground NI" << std::endl;
 241 }
 242