simgear/scene/material/TextureBuilder.cxx

   1 // Copyright (C) 2009  Tim Moore timoore@redhat.com
   2 //
   3 // This library is free software; you can redistribute it and/or
   4 // modify it under the terms of the GNU Library General Public
   5 // License as published by the Free Software Foundation; either
   6 // version 2 of the License, or (at your option) any later version.
   7 //
   8 // This library is distributed in the hope that it will be useful,
   9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11 // Library General Public License for more details.
  12 //
  13 // You should have received a copy of the GNU General Public License
  14 // along with this program; if not, write to the Free Software
  15 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  16
  17 #ifdef HAVE_CONFIG_H
  18 #  include <simgear_config.h>
  19 #endif
  20
  21 #include "TextureBuilder.hxx"
  22 #include "mipmap.hxx"
  23
  24 #include "Pass.hxx"
  25
  26 #include <osg/TexEnv>
  27 #include <osg/TexEnvCombine>
  28 #include <osg/TexGen>
  29 #include <osg/Texture1D>
  30 #include <osg/Texture2D>
  31 #include <osg/Texture3D>
  32 #include <osg/TextureRectangle>
  33 #include <osg/TextureCubeMap>
  34 #include <osgDB/FileUtils>
  35 #include <osgDB/ReadFile>
  36
  37 #include <boost/lexical_cast.hpp>
  38 #include <boost/tuple/tuple.hpp>
  39 #include <boost/tuple/tuple_comparison.hpp>
  40
  41 #include <simgear/scene/util/OsgMath.hxx>
  42 #include <simgear/scene/util/SGReaderWriterOptions.hxx>
  43 #include <simgear/scene/util/SGSceneFeatures.hxx>
  44 #include <simgear/scene/util/StateAttributeFactory.hxx>
  45 #include <simgear/structure/OSGUtils.hxx>
  46 #include <simgear/props/vectorPropTemplates.hxx>
  47
  48 namespace simgear
  49 {
  50 using namespace std;
  51 using namespace osg;
  52
  53 using namespace effect;
  54
  55 TexEnvCombine* buildTexEnvCombine(Effect* effect,
  56                                   const SGPropertyNode* envProp,
  57                                   const SGReaderWriterOptions* options);
  58 TexGen* buildTexGen(Effect* Effect, const SGPropertyNode* tgenProp);
  59
  60 // Hack to force inclusion of TextureBuilder.cxx in library
  61 osg::Texture* TextureBuilder::buildFromType(Effect* effect, Pass* pass, const string& type,
  62                                             const SGPropertyNode*props,
  63                                             const SGReaderWriterOptions*
  64                                             options)
  65 {
  66     return EffectBuilder<Texture>::buildFromType(effect, pass, type, props, options);
  67 }
  68
  69 typedef boost::tuple<string, Texture::FilterMode, Texture::FilterMode,
  70                      Texture::WrapMode, Texture::WrapMode, Texture::WrapMode,
  71                      string, MipMapTuple> TexTuple;
  72
  73 EffectNameValue<TexEnv::Mode> texEnvModesInit[] =
  74 {
  75     {"add", TexEnv::ADD},
  76     {"blend", TexEnv::BLEND},
  77     {"decal", TexEnv::DECAL},
  78     {"modulate", TexEnv::MODULATE},
  79     {"replace", TexEnv::REPLACE}
  80 };
  81 EffectPropertyMap<TexEnv::Mode> texEnvModes(texEnvModesInit);
  82
  83 TexEnv* buildTexEnv(Effect* effect, const SGPropertyNode* prop)
  84 {
  85     const SGPropertyNode* modeProp = getEffectPropertyChild(effect, prop,
  86                                                             "mode");
  87     const SGPropertyNode* colorProp = getEffectPropertyChild(effect, prop,
  88                                                              "color");
  89     if (!modeProp)
  90         return 0;
  91     TexEnv::Mode mode = TexEnv::MODULATE;
  92     findAttr(texEnvModes, modeProp, mode);
  93     if (mode == TexEnv::MODULATE) {
  94         return StateAttributeFactory::instance()->getStandardTexEnv();
  95     }
  96     TexEnv* env = new TexEnv(mode);
  97     if (colorProp)
  98         env->setColor(toOsg(colorProp->getValue<SGVec4d>()));
  99     return env;
 100 }
 101
 102
 103 void TextureUnitBuilder::buildAttribute(Effect* effect, Pass* pass,
 104                                         const SGPropertyNode* prop,
 105                                         const SGReaderWriterOptions* options)
 106 {
 107     if (!isAttributeActive(effect, prop))
 108         return;
 109     // Decode the texture unit
 110     int unit = 0;
 111     const SGPropertyNode* pUnit = prop->getChild("unit");
 112     if (pUnit) {
 113         unit = pUnit->getValue<int>();
 114     } else {
 115         const SGPropertyNode* pName = prop->getChild("name");
 116         if (pName)
 117             try {
 118                 unit = boost::lexical_cast<int>(pName->getStringValue());
 119             } catch (boost::bad_lexical_cast& lex) {
 120                 SG_LOG(SG_INPUT, SG_ALERT, "can't decode name as texture unit "
 121                        << lex.what());
 122             }
 123     }
 124     const SGPropertyNode* pType = getEffectPropertyChild(effect, prop, "type");
 125     string type;
 126     if (!pType)
 127         type = "2d";
 128     else
 129         type = pType->getStringValue();
 130     Texture* texture = 0;
 131     try {
 132         texture = TextureBuilder::buildFromType(effect, pass, type, prop,
 133                                                 options);
 134     }
 135     catch (BuilderException& e) {
 136         SG_LOG(SG_INPUT, SG_DEBUG, e.getFormattedMessage() << ", "
 137             << "maybe the reader did not set the filename attribute, "
 138             << "using white for type '" << type << "' on '" << pass->getName() << "', in " << prop->getPath() );
 139         texture = StateAttributeFactory::instance()->getWhiteTexture();
 140     }
 141     pass->setTextureAttributeAndModes(unit, texture);
 142     const SGPropertyNode* envProp = prop->getChild("environment");
 143     if (envProp) {
 144         TexEnv* env = buildTexEnv(effect, envProp);
 145         if (env)
 146             pass->setTextureAttributeAndModes(unit, env);
 147     }
 148     const SGPropertyNode* combineProp = prop->getChild("texenv-combine");
 149     TexEnvCombine* combiner = 0;
 150     if (combineProp && ((combiner = buildTexEnvCombine(effect, combineProp,
 151                                                        options))))
 152         pass->setTextureAttributeAndModes(unit, combiner);
 153     const SGPropertyNode* tgenProp = prop->getChild("texgen");
 154     TexGen* tgen = 0;
 155     if (tgenProp && (tgen = buildTexGen(effect, tgenProp)))
 156         pass->setTextureAttributeAndModes(unit, tgen);
 157 }
 158
 159 // InstallAttributeBuilder call is in Effect.cxx to force this file to
 160 // be linked in.
 161
 162 namespace
 163 {
 164 EffectNameValue<Texture::FilterMode> filterModesInit[] =
 165 {
 166     { "linear", Texture::LINEAR },
 167     { "linear-mipmap-linear", Texture::LINEAR_MIPMAP_LINEAR},
 168     { "linear-mipmap-nearest", Texture::LINEAR_MIPMAP_NEAREST},
 169     { "nearest", Texture::NEAREST},
 170     { "nearest-mipmap-linear", Texture::NEAREST_MIPMAP_LINEAR},
 171     { "nearest-mipmap-nearest", Texture::NEAREST_MIPMAP_NEAREST}
 172 };
 173 EffectPropertyMap<Texture::FilterMode> filterModes(filterModesInit);
 174
 175 EffectNameValue<Texture::WrapMode> wrapModesInit[] =
 176 {
 177     {"clamp", Texture::CLAMP},
 178     {"clamp-to-border", Texture::CLAMP_TO_BORDER},
 179     {"clamp-to-edge", Texture::CLAMP_TO_EDGE},
 180     {"mirror", Texture::MIRROR},
 181     {"repeat", Texture::REPEAT}
 182 };
 183 EffectPropertyMap<Texture::WrapMode> wrapModes(wrapModesInit);
 184
 185 TexTuple makeTexTuple(Effect* effect, const SGPropertyNode* props,
 186                       const SGReaderWriterOptions* options,
 187                       const string& texType)
 188 {
 189     Texture::FilterMode minFilter = Texture::LINEAR_MIPMAP_LINEAR;
 190     const SGPropertyNode* ep = 0;
 191     if ((ep = getEffectPropertyChild(effect, props, "filter")))
 192         findAttr(filterModes, ep, minFilter);
 193     Texture::FilterMode magFilter = Texture::LINEAR;
 194     if ((ep = getEffectPropertyChild(effect, props, "mag-filter")))
 195         findAttr(filterModes, ep, magFilter);
 196     const SGPropertyNode* pWrapS
 197         = getEffectPropertyChild(effect, props, "wrap-s");
 198     Texture::WrapMode sWrap = Texture::CLAMP;
 199     if (pWrapS)
 200         findAttr(wrapModes, pWrapS, sWrap);
 201     const SGPropertyNode* pWrapT
 202         = getEffectPropertyChild(effect, props, "wrap-t");
 203     Texture::WrapMode tWrap = Texture::CLAMP;
 204     if (pWrapT)
 205         findAttr(wrapModes, pWrapT, tWrap);
 206     const SGPropertyNode* pWrapR
 207         = getEffectPropertyChild(effect, props, "wrap-r");
 208     Texture::WrapMode rWrap = Texture::CLAMP;
 209     if (pWrapR)
 210         findAttr(wrapModes, pWrapR, rWrap);
 211     const SGPropertyNode* pImage
 212         = getEffectPropertyChild(effect, props, "image");
 213     string imageName;
 214     string absFileName;
 215     if (pImage)
 216     {
 217         imageName = pImage->getStringValue();
 218         absFileName = SGModelLib::findDataFile(imageName, options);
 219         if (absFileName.empty())
 220         {
 221             SG_LOG(SG_INPUT, SG_ALERT, "Texture file not found: '"
 222                    << imageName << "'");
 223         }
 224     }
 225
 226     const SGPropertyNode* pMipmapControl
 227         = getEffectPropertyChild(effect, props, "mipmap-control");
 228     MipMapTuple mipmapFunctions( AUTOMATIC, AUTOMATIC, AUTOMATIC, AUTOMATIC );
 229     if ( pMipmapControl )
 230         mipmapFunctions = makeMipMapTuple(effect, pMipmapControl, options);
 231
 232     return TexTuple(absFileName, minFilter, magFilter, sWrap, tWrap, rWrap,
 233                     texType, mipmapFunctions);
 234 }
 235
 236 void setAttrs(const TexTuple& attrs, Texture* tex,
 237               const SGReaderWriterOptions* options)
 238 {
 239     const string& imageName = attrs.get<0>();
 240     if (imageName.empty()) {
 241         throw BuilderException("no image file");
 242     } else {
 243         osgDB::ReaderWriter::ReadResult result;
 244         result = osgDB::readImageFile(imageName, options);
 245         osg::ref_ptr<osg::Image> image;
 246         if (result.success())
 247             image = result.getImage();
 248         if (image.valid())
 249         {
 250             image = computeMipmap( image.get(), attrs.get<7>() );
 251             tex->setImage(GL_FRONT_AND_BACK, image.get());
 252             int s = image->s();
 253             int t = image->t();
 254             if (s <= t && 32 <= s) {
 255                 SGSceneFeatures::instance()->setTextureCompression(tex);
 256             } else if (t < s && 32 <= t) {
 257                 SGSceneFeatures::instance()->setTextureCompression(tex);
 258             }
 259             tex->setMaxAnisotropy(SGSceneFeatures::instance()
 260                                   ->getTextureFilter());
 261         } else {
 262             SG_LOG(SG_INPUT, SG_ALERT, "failed to load effect texture file "
 263                    << imageName);
 264         }
 265     }
 266     // texture->setDataVariance(osg::Object::STATIC);
 267     tex->setFilter(Texture::MIN_FILTER, attrs.get<1>());
 268     tex->setFilter(Texture::MAG_FILTER, attrs.get<2>());
 269     tex->setWrap(Texture::WRAP_S, attrs.get<3>());
 270     tex->setWrap(Texture::WRAP_T, attrs.get<4>());
 271     tex->setWrap(Texture::WRAP_R, attrs.get<5>());
 272 }
 273 }
 274
 275 template<typename T>
 276 class TexBuilder : public TextureBuilder
 277 {
 278 public:
 279     TexBuilder(const string& texType) : _type(texType) {}
 280     Texture* build(Effect* effect, Pass* pass, const SGPropertyNode*,
 281                    const SGReaderWriterOptions* options);
 282 protected:
 283     typedef map<TexTuple, observer_ptr<T> > TexMap;
 284     TexMap texMap;
 285     const string _type;
 286 };
 287
 288 template<typename T>
 289 Texture* TexBuilder<T>::build(Effect* effect, Pass* pass, const SGPropertyNode* props,
 290                               const SGReaderWriterOptions* options)
 291 {
 292     TexTuple attrs = makeTexTuple(effect, props, options, _type);
 293     typename TexMap::iterator itr = texMap.find(attrs);
 294
 295     ref_ptr<T> tex;
 296     if ((itr != texMap.end())&&
 297         (itr->second.lock(tex)))
 298     {
 299         return tex.release();
 300     }
 301
 302     tex = new T;
 303     setAttrs(attrs, tex, options);
 304     if (itr == texMap.end())
 305         texMap.insert(make_pair(attrs, tex));
 306     else
 307         itr->second = tex; // update existing, but empty observer
 308     return tex.release();
 309 }
 310
 311
 312 namespace
 313 {
 314 TextureBuilder::Registrar install1D("1d", new TexBuilder<Texture1D>("1d"));
 315 TextureBuilder::Registrar install2D("2d", new TexBuilder<Texture2D>("2d"));
 316 TextureBuilder::Registrar install3D("3d", new TexBuilder<Texture3D>("3d"));
 317 }
 318
 319 class WhiteTextureBuilder : public TextureBuilder
 320 {
 321 public:
 322     Texture* build(Effect* effect, Pass* pass, const SGPropertyNode*,
 323                    const SGReaderWriterOptions* options);
 324 };
 325
 326 Texture* WhiteTextureBuilder::build(Effect* effect, Pass* pass, const SGPropertyNode*,
 327                                     const SGReaderWriterOptions* options)
 328 {
 329     return StateAttributeFactory::instance()->getWhiteTexture();
 330 }
 331
 332 namespace
 333 {
 334 TextureBuilder::Registrar installWhite("white", new WhiteTextureBuilder);
 335 }
 336
 337 class TransparentTextureBuilder : public TextureBuilder
 338 {
 339 public:
 340     Texture* build(Effect* effect, Pass* pass, const SGPropertyNode*,
 341                    const SGReaderWriterOptions* options);
 342 };
 343
 344 Texture* TransparentTextureBuilder::build(Effect* effect, Pass* pass, const SGPropertyNode*,
 345                                     const SGReaderWriterOptions* options)
 346 {
 347     return StateAttributeFactory::instance()->getTransparentTexture();
 348 }
 349
 350 namespace
 351 {
 352 TextureBuilder::Registrar installTransparent("transparent",
 353                                              new TransparentTextureBuilder);
 354 }
 355
 356 class NoiseBuilder : public TextureBuilder
 357 {
 358 public:
 359     Texture* build(Effect* effect, Pass* pass, const SGPropertyNode*,
 360                    const SGReaderWriterOptions* options);
 361 protected:
 362     typedef map<int, ref_ptr<Texture3D> > NoiseMap;
 363     NoiseMap _noises;
 364 };
 365
 366 Texture* NoiseBuilder::build(Effect* effect, Pass* pass, const SGPropertyNode* props,
 367                              const SGReaderWriterOptions* options)
 368 {
 369     int texSize = 64;
 370     const SGPropertyNode* sizeProp = getEffectPropertyChild(effect, props,
 371                                                             "size");
 372     if (sizeProp)
 373         texSize = sizeProp->getValue<int>();
 374
 375     return StateAttributeFactory::instance()->getNoiseTexture(texSize);
 376 }
 377
 378 namespace
 379 {
 380 TextureBuilder::Registrar installNoise("noise", new NoiseBuilder);
 381 }
 382
 383
 384
 385 // Image names for all sides
 386 typedef boost::tuple<string, string, string, string, string, string> CubeMapTuple;
 387
 388 CubeMapTuple makeCubeMapTuple(Effect* effect, const SGPropertyNode* props)
 389 {
 390     const SGPropertyNode* ep = 0;
 391
 392     string positive_x;
 393     if ((ep = getEffectPropertyChild(effect, props, "positive-x")))
 394         positive_x = ep->getStringValue();
 395     string negative_x;
 396     if ((ep = getEffectPropertyChild(effect, props, "negative-x")))
 397         negative_x = ep->getStringValue();
 398     string positive_y;
 399     if ((ep = getEffectPropertyChild(effect, props, "positive-y")))
 400         positive_y = ep->getStringValue();
 401     string negative_y;
 402     if ((ep = getEffectPropertyChild(effect, props, "negative-y")))
 403         negative_y = ep->getStringValue();
 404     string positive_z;
 405     if ((ep = getEffectPropertyChild(effect, props, "positive-z")))
 406         positive_z = ep->getStringValue();
 407     string negative_z;
 408     if ((ep = getEffectPropertyChild(effect, props, "negative-z")))
 409         negative_z = ep->getStringValue();
 410     return CubeMapTuple(positive_x, negative_x, positive_y, negative_y, positive_z, negative_z);
 411 }
 412
 413
 414 class CubeMapBuilder : public TextureBuilder
 415 {
 416 public:
 417     Texture* build(Effect* effect, Pass* pass, const SGPropertyNode*,
 418                    const SGReaderWriterOptions* options);
 419 protected:
 420     typedef map<CubeMapTuple, ref_ptr<TextureCubeMap> > CubeMap;
 421     typedef map<string, ref_ptr<TextureCubeMap> > CrossCubeMap;
 422     CubeMap _cubemaps;
 423     CrossCubeMap _crossmaps;
 424 };
 425
 426 // I use this until osg::CopyImage is fixed
 427 // This one assumes images are the same format and sizes are correct
 428 void copySubImage(const osg::Image* srcImage, int src_s, int src_t, int width, int height,
 429                  osg::Image* destImage, int dest_s, int dest_t)
 430 {
 431     for(int row = 0; row<height; ++row)
 432     {
 433         const unsigned char* srcData = srcImage->data(src_s, src_t+row, 0);
 434         unsigned char* destData = destImage->data(dest_s, dest_t+row, 0);
 435         memcpy(destData, srcData, (width*destImage->getPixelSizeInBits())/8);
 436     }
 437 }
 438
 439
 440 Texture* CubeMapBuilder::build(Effect* effect, Pass* pass, const SGPropertyNode* props,
 441                                const SGReaderWriterOptions* options)
 442 {
 443     // First check that there is a <images> tag
 444     const SGPropertyNode* texturesProp = getEffectPropertyChild(effect, props, "images");
 445     const SGPropertyNode* crossProp = getEffectPropertyChild(effect, props, "image");
 446     if (!texturesProp && !crossProp) {
 447         throw BuilderException("no images defined for cube map");
 448         return NULL; // This is redundant
 449     }
 450
 451     // Using 6 separate images
 452     if(texturesProp) {
 453
 454         SG_LOG(SG_INPUT, SG_DEBUG, "try 6 images ");
 455
 456         CubeMapTuple _tuple = makeCubeMapTuple(effect, texturesProp);
 457
 458         CubeMap::iterator itr = _cubemaps.find(_tuple);
 459         if (itr != _cubemaps.end())
 460             return itr->second.get();
 461
 462         TextureCubeMap* cubeTexture = new osg::TextureCubeMap;
 463
 464         // TODO: Read these from effect file? Maybe these are sane for all cuebmaps?
 465         cubeTexture->setFilter(osg::Texture3D::MIN_FILTER, osg::Texture::LINEAR_MIPMAP_LINEAR);
 466         cubeTexture->setFilter(osg::Texture3D::MAG_FILTER, osg::Texture::LINEAR);
 467         cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 468         cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 469         cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 470
 471         osgDB::ReaderWriter::ReadResult result;
 472         result = osgDB::readImageFile(_tuple.get<0>(), options);
 473         if(result.success()) {
 474             osg::Image* image = result.getImage();
 475             cubeTexture->setImage(TextureCubeMap::POSITIVE_X, image);
 476         }
 477         result = osgDB::readImageFile(_tuple.get<1>(), options);
 478         if(result.success()) {
 479             osg::Image* image = result.getImage();
 480             cubeTexture->setImage(TextureCubeMap::NEGATIVE_X, image);
 481         }
 482         result = osgDB::readImageFile(_tuple.get<2>(), options);
 483         if(result.success()) {
 484             osg::Image* image = result.getImage();
 485             cubeTexture->setImage(TextureCubeMap::POSITIVE_Y, image);
 486         }
 487         result = osgDB::readImageFile(_tuple.get<3>(), options);
 488         if(result.success()) {
 489             osg::Image* image = result.getImage();
 490             cubeTexture->setImage(TextureCubeMap::NEGATIVE_Y, image);
 491         }
 492         result = osgDB::readImageFile(_tuple.get<4>(), options);
 493         if(result.success()) {
 494             osg::Image* image = result.getImage();
 495             cubeTexture->setImage(TextureCubeMap::POSITIVE_Z, image);
 496         }
 497         result = osgDB::readImageFile(_tuple.get<5>(), options);
 498         if(result.success()) {
 499             osg::Image* image = result.getImage();
 500             cubeTexture->setImage(TextureCubeMap::NEGATIVE_Z, image);
 501         }
 502
 503         _cubemaps[_tuple] = cubeTexture;
 504
 505         return cubeTexture;
 506     }
 507
 508
 509     // Using 1 cross image
 510     else if(crossProp) {
 511         SG_LOG(SG_INPUT, SG_DEBUG, "try cross map ");
 512
 513         std::string texname = crossProp->getStringValue();
 514
 515         // Try to find existing cube map
 516         CrossCubeMap::iterator itr = _crossmaps.find(texname);
 517         if (itr != _crossmaps.end())
 518             return itr->second.get();
 519
 520         osgDB::ReaderWriter::ReadResult result;
 521         result = osgDB::readImageFile(texname, options);
 522         if(result.success()) {
 523             osg::Image* image = result.getImage();
 524             image->flipVertical();   // Seems like the image coordinates are somewhat funny, flip to get better ones
 525
 526             //cubeTexture->setResizeNonPowerOfTwoHint(false);
 527
 528             // Size of a single image, 4 rows and 3 columns
 529             int width = image->s() / 3;
 530             int height = image->t() / 4;
 531             int depth = image->r();
 532
 533             TextureCubeMap* cubeTexture = new osg::TextureCubeMap;
 534
 535             // Copy the 6 sub-images and push them
 536             for(int n=0; n<6; n++) {
 537
 538                 SG_LOG(SG_INPUT, SG_DEBUG, "Copying the " << n << "th sub-images and pushing it" );
 539
 540                 osg::ref_ptr<osg::Image> subimg = new osg::Image();
 541                 subimg->allocateImage(width, height, depth, image->getPixelFormat(), image->getDataType());  // Copy attributes
 542
 543                 // Choose correct image
 544                 switch(n) {
 545                 case 0:  // Front
 546                     copySubImage(image, width, 0, width, height, subimg.get(), 0, 0);
 547                     cubeTexture->setImage(TextureCubeMap::POSITIVE_Y, subimg.get());
 548                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 549                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 550                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 551                     break;
 552                 case 1:  // Left
 553                     copySubImage(image, 0, height, width, height, subimg.get(), 0, 0);
 554                     cubeTexture->setImage(TextureCubeMap::NEGATIVE_X, subimg.get());
 555                     cubeTexture->setWrap(osg::Texture2D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 556                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 557                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 558                     break;
 559                 case 2:  // Top
 560                     copySubImage(image, width, height, width, height, subimg.get(), 0, 0);
 561                     cubeTexture->setImage(TextureCubeMap::POSITIVE_Z, subimg.get());
 562                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 563                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 564                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 565                     break;
 566                 case 3:  // Right
 567                     copySubImage(image, width*2, height, width, height, subimg.get(), 0, 0);
 568                     cubeTexture->setImage(TextureCubeMap::POSITIVE_X, subimg.get());
 569                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 570                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 571                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 572                     break;
 573                 case 4:  // Back
 574                     copySubImage(image, width, height*2, width, height, subimg.get(), 0, 0);
 575                     cubeTexture->setImage(TextureCubeMap::NEGATIVE_Y, subimg.get());
 576                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 577                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 578                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 579                     break;
 580                 case 5:  // Bottom
 581                     copySubImage(image, width, height*3, width, height, subimg.get(), 0, 0);
 582                     cubeTexture->setImage(TextureCubeMap::NEGATIVE_Z, subimg.get());
 583                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 584                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 585                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 586                     break;
 587                 };
 588
 589             }
 590
 591             _crossmaps[texname] = cubeTexture;
 592
 593             return cubeTexture;
 594
 595         } else {
 596             throw BuilderException("Could not load cube cross");
 597         }
 598     }
 599
 600     return NULL;
 601 }
 602
 603 namespace {
 604 TextureBuilder::Registrar installCubeMap("cubemap", new CubeMapBuilder);
 605 }
 606
 607 EffectNameValue<TexEnvCombine::CombineParam> combineParamInit[] =
 608 {
 609     {"replace", TexEnvCombine::REPLACE},
 610     {"modulate", TexEnvCombine::MODULATE},
 611     {"add", TexEnvCombine::ADD},
 612     {"add-signed", TexEnvCombine::ADD_SIGNED},
 613     {"interpolate", TexEnvCombine::INTERPOLATE},
 614     {"subtract", TexEnvCombine::SUBTRACT},
 615     {"dot3-rgb", TexEnvCombine::DOT3_RGB},
 616     {"dot3-rgba", TexEnvCombine::DOT3_RGBA}
 617 };
 618
 619 EffectPropertyMap<TexEnvCombine::CombineParam> combineParams(combineParamInit);
 620
 621 EffectNameValue<TexEnvCombine::SourceParam> sourceParamInit[] =
 622 {
 623     {"constant", TexEnvCombine::CONSTANT},
 624     {"primary_color", TexEnvCombine::PRIMARY_COLOR},
 625     {"previous", TexEnvCombine::PREVIOUS},
 626     {"texture", TexEnvCombine::TEXTURE},
 627     {"texture0", TexEnvCombine::TEXTURE0},
 628     {"texture1", TexEnvCombine::TEXTURE1},
 629     {"texture2", TexEnvCombine::TEXTURE2},
 630     {"texture3", TexEnvCombine::TEXTURE3},
 631     {"texture4", TexEnvCombine::TEXTURE4},
 632     {"texture5", TexEnvCombine::TEXTURE5},
 633     {"texture6", TexEnvCombine::TEXTURE6},
 634     {"texture7", TexEnvCombine::TEXTURE7}
 635 };
 636
 637 EffectPropertyMap<TexEnvCombine::SourceParam> sourceParams(sourceParamInit);
 638
 639 EffectNameValue<TexEnvCombine::OperandParam> opParamInit[] =
 640 {
 641     {"src-color", TexEnvCombine::SRC_COLOR},
 642     {"one-minus-src-color", TexEnvCombine::ONE_MINUS_SRC_COLOR},
 643     {"src-alpha", TexEnvCombine::SRC_ALPHA},
 644     {"one-minus-src-alpha", TexEnvCombine::ONE_MINUS_SRC_ALPHA}
 645 };
 646
 647 EffectPropertyMap<TexEnvCombine::OperandParam> operandParams(opParamInit);
 648
 649 TexEnvCombine* buildTexEnvCombine(Effect* effect, const SGPropertyNode* envProp,
 650                                   const SGReaderWriterOptions* options)
 651 {
 652     if (!isAttributeActive(effect, envProp))
 653         return 0;
 654     TexEnvCombine* result = new TexEnvCombine;
 655     const SGPropertyNode* p = 0;
 656     if ((p = getEffectPropertyChild(effect, envProp, "combine-rgb"))) {
 657         TexEnvCombine::CombineParam crgb = TexEnvCombine::MODULATE;
 658         findAttr(combineParams, p, crgb);
 659         result->setCombine_RGB(crgb);
 660     }
 661     if ((p = getEffectPropertyChild(effect, envProp, "combine-alpha"))) {
 662         TexEnvCombine::CombineParam calpha = TexEnvCombine::MODULATE;
 663         findAttr(combineParams, p, calpha);
 664         result->setCombine_Alpha(calpha);
 665     }
 666     if ((p = getEffectPropertyChild(effect, envProp, "source0-rgb"))) {
 667         TexEnvCombine::SourceParam source = TexEnvCombine::TEXTURE;
 668         findAttr(sourceParams, p, source);
 669         result->setSource0_RGB(source);
 670     }
 671     if ((p = getEffectPropertyChild(effect, envProp, "source1-rgb"))) {
 672         TexEnvCombine::SourceParam source = TexEnvCombine::PREVIOUS;
 673         findAttr(sourceParams, p, source);
 674         result->setSource1_RGB(source);
 675     }
 676     if ((p = getEffectPropertyChild(effect, envProp, "source2-rgb"))) {
 677         TexEnvCombine::SourceParam source = TexEnvCombine::CONSTANT;
 678         findAttr(sourceParams, p, source);
 679         result->setSource2_RGB(source);
 680     }
 681     if ((p = getEffectPropertyChild(effect, envProp, "source0-alpha"))) {
 682         TexEnvCombine::SourceParam source = TexEnvCombine::TEXTURE;
 683         findAttr(sourceParams, p, source);
 684         result->setSource0_Alpha(source);
 685     }
 686     if ((p = getEffectPropertyChild(effect, envProp, "source1-alpha"))) {
 687         TexEnvCombine::SourceParam source = TexEnvCombine::PREVIOUS;
 688         findAttr(sourceParams, p, source);
 689         result->setSource1_Alpha(source);
 690     }
 691     if ((p = getEffectPropertyChild(effect, envProp, "source2-alpha"))) {
 692         TexEnvCombine::SourceParam source = TexEnvCombine::CONSTANT;
 693         findAttr(sourceParams, p, source);
 694         result->setSource2_Alpha(source);
 695     }
 696     if ((p = getEffectPropertyChild(effect, envProp, "operand0-rgb"))) {
 697         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_COLOR;
 698         findAttr(operandParams, p, op);
 699         result->setOperand0_RGB(op);
 700     }
 701     if ((p = getEffectPropertyChild(effect, envProp, "operand1-rgb"))) {
 702         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_COLOR;
 703         findAttr(operandParams, p, op);
 704         result->setOperand1_RGB(op);
 705     }
 706     if ((p = getEffectPropertyChild(effect, envProp, "operand2-rgb"))) {
 707         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 708         findAttr(operandParams, p, op);
 709         result->setOperand2_RGB(op);
 710     }
 711     if ((p = getEffectPropertyChild(effect, envProp, "operand0-alpha"))) {
 712         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 713         findAttr(operandParams, p, op);
 714         result->setOperand0_Alpha(op);
 715     }
 716     if ((p = getEffectPropertyChild(effect, envProp, "operand1-alpha"))) {
 717         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 718         findAttr(operandParams, p, op);
 719         result->setOperand1_Alpha(op);
 720     }
 721     if ((p = getEffectPropertyChild(effect, envProp, "operand2-alpha"))) {
 722         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 723         findAttr(operandParams, p, op);
 724         result->setOperand2_Alpha(op);
 725     }
 726     if ((p = getEffectPropertyChild(effect, envProp, "scale-rgb"))) {
 727         result->setScale_RGB(p->getValue<float>());
 728     }
 729     if ((p = getEffectPropertyChild(effect, envProp, "scale-alpha"))) {
 730         result->setScale_Alpha(p->getValue<float>());
 731     }
 732 #if 0
 733     if ((p = getEffectPropertyChild(effect, envProp, "constant-color"))) {
 734         SGVec4d color = p->getValue<SGVec4d>();
 735         result->setConstantColor(toOsg(color));
 736     } else if ((p = getEffectPropertyChild(effect, envProp,
 737                                            "light-direction"))) {
 738         SGVec3d direction = p->getValue<SGVec3d>();
 739         result->setConstantColorAsLightDirection(toOsg(direction));
 740     }
 741 #endif
 742     const SGPropertyNode* colorNode = envProp->getChild("constant-color");
 743     if (colorNode)
 744         initFromParameters(effect, colorNode, result,
 745                            &TexEnvCombine::setConstantColor, colorFields,
 746                            options);
 747     return result;
 748 }
 749
 750 EffectNameValue<TexGen::Mode> tgenModeInit[] =
 751 {
 752     { "object-linear", TexGen::OBJECT_LINEAR},
 753     { "eye-linear", TexGen::EYE_LINEAR},
 754     { "sphere-map", TexGen::SPHERE_MAP},
 755     { "normal-map", TexGen::NORMAL_MAP},
 756     { "reflection-map", TexGen::REFLECTION_MAP}
 757 };
 758
 759 EffectPropertyMap<TexGen::Mode> tgenModes(tgenModeInit);
 760
 761 EffectNameValue<TexGen::Coord> tgenCoordInit[] =
 762 {
 763     {"s", TexGen::S},
 764     {"t", TexGen::T},
 765     {"r", TexGen::R},
 766     {"q", TexGen::Q}
 767 };
 768
 769 EffectPropertyMap<TexGen::Coord> tgenCoords(tgenCoordInit);
 770
 771 TexGen* buildTexGen(Effect* effect, const SGPropertyNode* tgenProp)
 772 {
 773     if (!isAttributeActive(effect, tgenProp))
 774         return 0;
 775     TexGen* result = new TexGen;
 776     TexGen::Mode mode = TexGen::OBJECT_LINEAR;
 777     findAttr(tgenModes, getEffectPropertyChild(effect, tgenProp, "mode"), mode);
 778     result->setMode(mode);
 779     const SGPropertyNode* planesNode = tgenProp->getChild("planes");
 780     if (planesNode) {
 781         for (int i = 0; i < planesNode->nChildren(); ++i) {
 782             const SGPropertyNode* planeNode = planesNode->getChild(i);
 783             TexGen::Coord coord;
 784             findAttr(tgenCoords, planeNode->getName(), coord);
 785             const SGPropertyNode* realNode
 786                 = getEffectPropertyNode(effect, planeNode);
 787             SGVec4d plane = realNode->getValue<SGVec4d>();
 788             result->setPlane(coord, toOsg(plane));
 789         }
 790     }
 791     return result;
 792 }
 793
 794 bool makeTextureParameters(SGPropertyNode* paramRoot, const StateSet* ss)
 795 {
 796     SGPropertyNode* texUnit = makeChild(paramRoot, "texture");
 797     const Texture* tex = getStateAttribute<Texture>(0, ss);
 798     const Texture2D* texture = dynamic_cast<const Texture2D*>(tex);
 799     makeChild(texUnit, "unit")->setValue(0);
 800     if (!tex) {
 801         // The default shader-based technique ignores active
 802         makeChild(texUnit, "active")->setValue(false);
 803         return false;
 804     }
 805     const Image* image = texture->getImage();
 806     string imageName;
 807     if (image) {
 808         imageName = image->getFileName();
 809     } else {
 810         makeChild(texUnit, "active")->setValue(false);
 811         makeChild(texUnit, "type")->setValue("white");
 812         return false;
 813     }
 814     makeChild(texUnit, "active")->setValue(true);
 815     makeChild(texUnit, "type")->setValue("2d");
 816     string filter = findName(filterModes,
 817                              texture->getFilter(Texture::MIN_FILTER));
 818     string magFilter = findName(filterModes,
 819                              texture->getFilter(Texture::MAG_FILTER));
 820     string wrapS = findName(wrapModes, texture->getWrap(Texture::WRAP_S));
 821     string wrapT = findName(wrapModes, texture->getWrap(Texture::WRAP_T));
 822     string wrapR = findName(wrapModes, texture->getWrap(Texture::WRAP_R));
 823     makeChild(texUnit, "image")->setStringValue(imageName);
 824     makeChild(texUnit, "filter")->setStringValue(filter);
 825     makeChild(texUnit, "mag-filter")->setStringValue(magFilter);
 826     makeChild(texUnit, "wrap-s")->setStringValue(wrapS);
 827     makeChild(texUnit, "wrap-t")->setStringValue(wrapT);
 828     makeChild(texUnit, "wrap-r")->setStringValue(wrapR);
 829     return true;
 830 }
 831
 832 class GBufferBuilder : public TextureBuilder
 833 {
 834 public:
 835     GBufferBuilder() {}
 836     Texture* build(Effect* effect, Pass* pass, const SGPropertyNode*,
 837                    const SGReaderWriterOptions* options);
 838 private:
 839     string buffer;
 840 };
 841
 842 class BufferNameChangeListener : public SGPropertyChangeListener, public InitializeWhenAdded,
 843       public Effect::Updater {
 844 public:
 845     BufferNameChangeListener(Pass* p, int u, const std::string& pn) : pass(p), unit(u)
 846     {
 847         propName = new std::string(pn);
 848     }
 849     ~BufferNameChangeListener()
 850     {
 851         delete propName;
 852         propName = 0;
 853     }
 854     void valueChanged(SGPropertyNode* node)
 855     {
 856         const char* buffer = node->getStringValue();
 857         pass->setBufferUnit(unit, buffer);
 858     }
 859     void initOnAddImpl(Effect* effect, SGPropertyNode* propRoot)
 860     {
 861         SGPropertyNode* listenProp = makeNode(propRoot, *propName);
 862         delete propName;
 863         propName = 0;
 864         if (listenProp)
 865             listenProp->addChangeListener(this, true);
 866     }
 867
 868 private:
 869     ref_ptr<Pass> pass;
 870     int unit;
 871     std::string* propName;
 872 };
 873
 874 Texture* GBufferBuilder::build(Effect* effect, Pass* pass, const SGPropertyNode* prop,
 875                                     const SGReaderWriterOptions* options)
 876 {
 877     int unit = 0;
 878     const SGPropertyNode* pUnit = prop->getChild("unit");
 879     if (pUnit) {
 880         unit = pUnit->getValue<int>();
 881     } else {
 882         SG_LOG(SG_INPUT, SG_ALERT, "no texture unit");
 883     }
 884     const SGPropertyNode* nameProp = getEffectPropertyChild(effect, prop,
 885                                                             "name");
 886     if (!nameProp)
 887         return 0;
 888
 889     if (nameProp->nChildren() == 0) {
 890         buffer = nameProp->getStringValue();
 891         pass->setBufferUnit( unit, buffer );
 892     } else {
 893         std::string propName = getGlobalProperty(nameProp, options);
 894         BufferNameChangeListener* listener = new BufferNameChangeListener(pass, unit, propName);
 895         effect->addUpdater(listener);
 896     }
 897
 898     // Return white for now. Would be overridden in Technique::ProcessDrawable
 899     return StateAttributeFactory::instance()->getWhiteTexture();
 900 }
 901
 902 namespace
 903 {
 904     TextureBuilder::Registrar installBuffer("buffer", new GBufferBuilder);
 905 }
 906
 907 }