Source/System/Window/Foreground/OSGTextureGrabForeground.cpp

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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 #include "OSGGLU.h"
  50
  51 #include "OSGViewport.h"
  52 #include "OSGImage.h"
  53 #include "OSGTextureObjChunk.h"
  54 #include "OSGDrawEnv.h"
  55
  56 #include "OSGTextureGrabForeground.h"
  57
  58 OSG_USING_NAMESPACE
  59
  60 // Documentation for this class is emited in the
  61 // OSGTextureGrabForegroundBase.cpp file.
  62 // To modify it, please change the .fcd file (OSGTextureGrabForeground.fcd) and
  63 // regenerate the base file.
  64
  65 /***************************************************************************\
  66  *                           Class variables                               *
  67 \***************************************************************************/
  68
  69 /***************************************************************************\
  70  *                           Class methods                                 *
  71 \***************************************************************************/
  72
  73 void TextureGrabForeground::initMethod(InitPhase ePhase)
  74 {
  75     Inherited::initMethod(ePhase);
  76 }
  77
  78
  79 /***************************************************************************\
  80  *                           Instance methods                              *
  81 \***************************************************************************/
  82
  83 /*-------------------------------------------------------------------------*\
  84  -  private                                                                 -
  85 \*-------------------------------------------------------------------------*/
  86
  87 /*----------------------- constructors & destructors ----------------------*/
  88
  89 TextureGrabForeground::TextureGrabForeground(void) :
  90     Inherited()
  91 {
  92 }
  93
  94 TextureGrabForeground::TextureGrabForeground(
  95     const TextureGrabForeground &source) :
  96
  97     Inherited(source)
  98 {
  99 }
 100
 101 TextureGrabForeground::~TextureGrabForeground(void)
 102 {
 103 }
 104
 105 /*----------------------------- class specific ----------------------------*/
 106
 107 void TextureGrabForeground::changed(ConstFieldMaskArg whichField,
 108                                     UInt32            origin,
 109                                     BitVector         details)
 110 {
 111     Inherited::changed(whichField, origin, details);
 112 }
 113
 114 void TextureGrabForeground::dump(      UInt32    ,
 115                                  const BitVector ) const
 116 {
 117     SLOG << "Dump TextureGrabForeground NI" << std::endl;
 118 }
 119
 120
 121 /*! Grab the image to the texture.
 122 */
 123 void TextureGrabForeground::draw(DrawEnv  *pEnv)
 124 {
 125     if(getActive() == false)
 126         return;
 127
 128     TextureObjChunk *t = getTexture();
 129
 130     if(t == NULL)       // No texture, no grab.
 131         return;
 132
 133     Int32  pw = pEnv->getPixelWidth (),
 134            ph = pEnv->getPixelHeight();
 135
 136     // Ignore empty viewports
 137     if(pw < 1 || ph < 1)
 138         return;
 139
 140     Image *i = t->getImage();
 141
 142     // If image is smaller than 2x2, resize it to vp size
 143     // the 2x2 is because you can't create 0x0 images
 144
 145     if((i->getWidth() <= 1 && i->getHeight() <= 1) ||
 146        (getAutoResize() && (osgAbs(i->getWidth () - pw) > 1 ||
 147                             osgAbs(i->getHeight() - ph) > 1 ) ) )
 148     {
 149         i->set(i->getPixelFormat(), pw, ph);
 150     }
 151
 152     UInt32 w = osgMin(Int32(i->getWidth ()), pw);
 153     UInt32 h = osgMin(Int32(i->getHeight()), ph);
 154
 155     glErr("TextureGrabForeground::activate precheck");
 156
 157     pEnv->getWindow()->validateGLObject(t->getGLId(), pEnv);
 158
 159     glErr("TextureGrabForeground::bind precheck");
 160
 161     GLenum bindTarget = getBindTarget(), copyTarget = getCopyTarget();
 162
 163     if(bindTarget == GL_NONE)
 164     {
 165        if(i->getDepth() > 1)
 166        {
 167             FWARNING(("TextureGrabBackground:: 3D textures not "
 168                         "supported for this window!\n"));
 169             return;
 170        }
 171        else if(h > 1)
 172        {
 173            bindTarget = GL_TEXTURE_2D;
 174        }
 175        else
 176        {
 177 #ifndef OSG_OGL_ES2
 178            bindTarget = GL_TEXTURE_1D;
 179 #else
 180            return;
 181 #endif
 182        }
 183     }
 184
 185     if(copyTarget == GL_NONE)
 186         copyTarget = bindTarget;
 187
 188     glBindTexture(bindTarget,
 189                   pEnv->getWindow()->getGLObjectId(t->getGLId()));
 190
 191     glErr("TextureGrabForeground::copy precheck");
 192
 193     if(copyTarget == GL_TEXTURE_3D)
 194     {
 195         FWARNING(("TextureGrabForeground:: grabbing to 3D textures not "
 196                   "supported yet!\n"));
 197     }
 198 #ifndef OSG_OGL_ES2
 199     else if(copyTarget == GL_TEXTURE_1D)
 200     {
 201         glCopyTexSubImage1D(copyTarget, 0, 0,
 202                             pEnv->getPixelLeft(), pEnv->getPixelBottom(),
 203                             w);
 204     }
 205 #endif
 206     else
 207     {
 208         glCopyTexSubImage2D(copyTarget, 0, 0, 0,
 209                             pEnv->getPixelLeft(), pEnv->getPixelBottom(),
 210                             w, h);
 211     }
 212
 213     glErr("TextureGrabForeground::copy postcheck");
 214
 215     glBindTexture(bindTarget, 0);
 216 }
 217