Source/System/Window/FrameBufferObjects/OSGLayeredTextureBuffer.cpp

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  37 \*---------------------------------------------------------------------------*/
  38
  39 //---------------------------------------------------------------------------
  40 //  Includes
  41 //---------------------------------------------------------------------------
  42
  43 #include <cstdlib>
  44 #include <cstdio>
  45
  46 #include "OSGConfig.h"
  47 #include "OSGGL.h"
  48 #include "OSGGLEXT.h"
  49 #include "OSGGLFuncProtos.h"
  50
  51 #include "OSGLayeredTextureBuffer.h"
  52 #include "OSGWindow.h"
  53 #include "OSGDrawEnv.h"
  54 #include "OSGTextureObjChunk.h"
  55 #include "OSGImage.h"
  56
  57 OSG_BEGIN_NAMESPACE
  58
  59 typedef void (OSG_APIENTRY *osgGlFramebufferTextureProc) (GLenum target,
  60                                                           GLenum attachment,
  61                                                           GLuint texture,
  62                                                           GLint  level     );
  63
  64
  65 UInt32 LayeredTextureBuffer::_uiGeoShader4_extension         =
  66     Window::invalidExtensionID;
  67
  68 UInt32 LayeredTextureBuffer::_uiFramebuffer_object_extension =
  69     Window::invalidExtensionID;
  70
  71 UInt32 LayeredTextureBuffer::_uiFuncFramebufferTexture       =
  72     Window::invalidFunctionID;
  73
  74 UInt32 LayeredTextureBuffer::_uiFuncGenerateMipmap           =
  75     Window::invalidFunctionID;
  76
  77 // Documentation for this class is emited in the
  78 // OSGLayeredTextureBufferBase.cpp file.
  79 // To modify it, please change the .fcd file (OSGLayeredTextureBuffer.fcd) and
  80 // regenerate the base file.
  81
  82 void LayeredTextureBuffer::bind(DrawEnv *pEnv, UInt32 index)
  83 {
  84     Window *pWindow = pEnv->getWindow();
  85
  86     if(_sfTexture.getValue() != NULL)
  87     {
  88         pWindow->validateGLObject(_sfTexture.getValue()->getGLId(), pEnv);
  89
  90         GLenum target;
  91
  92         if(getTexTarget() != GL_NONE)
  93         {
  94             target = getTexTarget();
  95         }
  96         else
  97         {
  98             target = _sfTexture.getValue()->determineTextureTarget(pWindow);
  99         }
 100
 101         switch(target)
 102         {
 103             case GL_TEXTURE_CUBE_MAP_ARRAY:
 104             case GL_TEXTURE_2D_ARRAY:
 105             case GL_TEXTURE_3D:
 106             {
 107                 OSGGETGLFUNCBYID_GL3( glFramebufferTexture,
 108                                       osgGlFramebufferTexture,
 109                                      _uiFuncFramebufferTexture,
 110                                       pWindow);
 111
 112                 osgGlFramebufferTexture(
 113                     GL_FRAMEBUFFER,
 114                     index,
 115                     pWindow->getGLObjectId(_sfTexture.getValue()->getGLId()),
 116                     0);
 117             }
 118             break;
 119         }
 120     }
 121 }
 122
 123 void LayeredTextureBuffer::validate(DrawEnv *pEnv)
 124 {
 125     Window *pWindow = pEnv->getWindow();
 126
 127     if(_sfTexture.getValue() != NULL)
 128     {
 129         pWindow->validateGLObject(_sfTexture.getValue()->getGLId(), pEnv);
 130     }
 131 }
 132
 133 void LayeredTextureBuffer::resizeBuffers(UInt32 uiWidth, UInt32 uiHeight)
 134 {
 135     TextureObjChunk *pTex = this->getTexture();
 136
 137     if(pTex == NULL)
 138         return;
 139
 140     Image *pImg = pTex->getImage();
 141
 142     if(pImg == NULL)
 143         return;
 144
 145     pImg->set(pImg->getPixelFormat(), //Image::OSG_RGB_PF,
 146               uiWidth,
 147               uiHeight,
 148               pImg->getDepth      (),
 149               pImg->getMipMapCount(),
 150               pImg->getFrameCount (),
 151               pImg->getFrameDelay (),
 152               NULL,
 153               pImg->getDataType   (), //Image::OSG_UINT8_IMAGEDATA,
 154               false,
 155               pImg->getSideCount  ());
 156 }
 157
 158 GLenum LayeredTextureBuffer::getBufferFormat(void) const
 159 {
 160     TextureObjChunk *pTex = this->getTexture();
 161
 162     if(pTex == NULL)
 163         return GL_NONE;
 164
 165     if(pTex->getInternalFormat() != GL_NONE)
 166         return pTex->getInternalFormat();
 167
 168     Image *pImg = pTex->getImage();
 169
 170     if(pImg == NULL)
 171         return GL_NONE;
 172
 173     return pImg->getPixelFormat();
 174 }
 175
 176
 177 void LayeredTextureBuffer::processPreDeactivate(DrawEnv *pEnv, UInt32 index)
 178 {
 179 #if 0
 180     if(_sfReadBack.getValue() == true)
 181     {
 182         TextureObjChunk *pTexObj = this->getTexture();
 183
 184         if(pTexObj == NULL)
 185             return;
 186
 187         Image *pTexImg = pTexObj->getImage();
 188
 189         if(pTexImg->getData() == NULL)
 190         {
 191             SINFO << "TextureBuffer::render: (Re)Allocating image "
 192                   << "for read-back."
 193                   << endLog;
 194
 195             pTexImg->set(pTexImg->getPixelFormat(),
 196                          pTexImg->getWidth      (),
 197                          pTexImg->getHeight     (),
 198                          pTexImg->getDepth      (),
 199                          pTexImg->getMipMapCount(),
 200                          pTexImg->getFrameCount (),
 201                          pTexImg->getFrameDelay (),
 202                          NULL,
 203                          pTexImg->getDataType   (),
 204                          true,
 205                          pTexImg->getSideCount  () );
 206         }
 207
 208         UInt32  mipMapLevel = _sfLevel.getValue();
 209         UInt32  frame       = 0;
 210         UInt32  side        = 0;
 211         GLenum  target;
 212         Window *pWindow = pEnv->getWindow();
 213
 214         if(_sfTexTarget.getValue() != GL_NONE)
 215         {
 216             target = _sfTexTarget.getValue();
 217         }
 218         else
 219         {
 220             target = _sfTexture.getValue()->determineTextureTarget(pWindow);
 221         }
 222
 223         switch(target)
 224         {
 225             case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
 226                 side = 0;
 227                 break;
 228             case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
 229                 side = 1;
 230                 break;
 231             case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
 232                 side = 2;
 233                 break;
 234             case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
 235                 side = 3;
 236                 break;
 237             case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
 238                 side = 4;
 239                 break;
 240             case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
 241                 side = 5;
 242                 break;
 243         }
 244
 245         // select GL_COLORATTACHMENTn and read data into image
 246 #ifndef OSG_OGL_ES2
 247         glReadBuffer(index);
 248 #endif
 249         glReadPixels(0, 0,
 250                      pTexImg->getWidth      (),
 251                      pTexImg->getHeight     (),
 252                      pTexImg->getPixelFormat(),
 253                      pTexImg->getDataType   (),
 254                      pTexImg->editData      (mipMapLevel, frame, side));
 255
 256 #ifndef OSG_OGL_ES2
 257         glReadBuffer(GL_NONE);
 258 #endif
 259     }
 260 #endif
 261 }
 262
 263 void LayeredTextureBuffer::processPostDeactivate(DrawEnv *pEnv)
 264 {
 265     Window *win = pEnv->getWindow();
 266
 267     // If there are TextureBuffers with mipmap filters attached,
 268     // the mipmaps need to be regenerated
 269     TextureObjChunk *pTexObj = this->getTexture();
 270
 271     if(pTexObj == NULL)
 272         return;
 273
 274     GLenum target = pTexObj->determineTextureTarget(win);
 275     if((target                  == GL_TEXTURE_CUBE_MAP_ARRAY ||
 276         target                  == GL_TEXTURE_2D_ARRAY       ||
 277         target                  == GL_TEXTURE_3D               )   &&
 278        (pTexObj->getMinFilter() == GL_NEAREST_MIPMAP_NEAREST ||
 279         pTexObj->getMinFilter() == GL_LINEAR_MIPMAP_NEAREST  ||
 280         pTexObj->getMinFilter() == GL_NEAREST_MIPMAP_LINEAR  ||
 281         pTexObj->getMinFilter() == GL_LINEAR_MIPMAP_LINEAR     )   )
 282     {
 283         OSGGETGLFUNCBYID_GL3_ES( glGenerateMipmap,
 284                                  osgGlGenerateMipmap,
 285                                 _uiFuncGenerateMipmap,
 286                                  win);
 287
 288         glBindTexture(target, win->getGLObjectId(pTexObj->getGLId()));
 289
 290         osgGlGenerateMipmap(target);
 291     }
 292 }
 293
 294 /*----------------------- constructors & destructors ----------------------*/
 295
 296 LayeredTextureBuffer::LayeredTextureBuffer(void) :
 297     Inherited()
 298 {
 299 }
 300
 301 LayeredTextureBuffer::LayeredTextureBuffer(const LayeredTextureBuffer &source) :
 302     Inherited(source)
 303 {
 304 }
 305
 306 LayeredTextureBuffer::~LayeredTextureBuffer(void)
 307 {
 308 }
 309
 310 /*----------------------------- class specific ----------------------------*/
 311
 312 void LayeredTextureBuffer::initMethod(InitPhase ePhase)
 313 {
 314     Inherited::initMethod(ePhase);
 315
 316     if(ePhase == TypeObject::SystemPost)
 317     {
 318         _uiGeoShader4_extension =
 319             Window::registerExtension("GL_ARB_geometry_shader4");
 320
 321         _uiFramebuffer_object_extension =
 322             Window::registerExtension("GL_ARB_framebuffer_object");
 323
 324         _uiFuncFramebufferTexture =
 325             Window::registerFunction (
 326                  OSG_DLSYM_UNDERSCORE"glFramebufferTexture",
 327                 _uiGeoShader4_extension);
 328
 329         _uiFuncGenerateMipmap =
 330             Window::registerFunction (
 331                  OSG_DLSYM_UNDERSCORE"glGenerateMipmap",
 332                 _uiFramebuffer_object_extension);
 333     }
 334
 335 }
 336
 337 void LayeredTextureBuffer::changed(ConstFieldMaskArg whichField,
 338                                    UInt32            origin,
 339                                    BitVector         details)
 340 {
 341     Inherited::changed(whichField, origin, details);
 342 }
 343
 344 void LayeredTextureBuffer::dump(      UInt32    ,
 345                                 const BitVector ) const
 346 {
 347     SLOG << "Dump TextureBuffer NI" << std::endl;
 348 }
 349
 350 OSG_END_NAMESPACE