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/SGReaderWriterOptions.hxx>
  42 #include <simgear/scene/util/SGSceneFeatures.hxx>
  43 #include <simgear/scene/util/StateAttributeFactory.hxx>
  44 #include <simgear/math/SGMath.hxx>
  45 #include <simgear/structure/OSGUtils.hxx>
  46
  47 #include "Noise.hxx"
  48
  49 namespace simgear
  50 {
  51 using namespace std;
  52 using namespace osg;
  53
  54 using namespace effect;
  55
  56 TexEnvCombine* buildTexEnvCombine(Effect* effect,
  57                                   const SGPropertyNode* envProp,
  58                                   const SGReaderWriterOptions* options);
  59 TexGen* buildTexGen(Effect* Effect, const SGPropertyNode* tgenProp);
  60
  61 // Hack to force inclusion of TextureBuilder.cxx in library
  62 osg::Texture* TextureBuilder::buildFromType(Effect* effect, const string& type,
  63                                             const SGPropertyNode*props,
  64                                             const SGReaderWriterOptions*
  65                                             options)
  66 {
  67     return EffectBuilder<Texture>::buildFromType(effect, type, props, options);
  68 }
  69
  70 typedef boost::tuple<string, Texture::FilterMode, Texture::FilterMode,
  71                      Texture::WrapMode, Texture::WrapMode, Texture::WrapMode,
  72                      string, MipMapTuple> TexTuple;
  73
  74 EffectNameValue<TexEnv::Mode> texEnvModesInit[] =
  75 {
  76     {"add", TexEnv::ADD},
  77     {"blend", TexEnv::BLEND},
  78     {"decal", TexEnv::DECAL},
  79     {"modulate", TexEnv::MODULATE},
  80     {"replace", TexEnv::REPLACE}
  81 };
  82 EffectPropertyMap<TexEnv::Mode> texEnvModes(texEnvModesInit);
  83
  84 TexEnv* buildTexEnv(Effect* effect, const SGPropertyNode* prop)
  85 {
  86     const SGPropertyNode* modeProp = getEffectPropertyChild(effect, prop,
  87                                                             "mode");
  88     const SGPropertyNode* colorProp = getEffectPropertyChild(effect, prop,
  89                                                              "color");
  90     if (!modeProp)
  91         return 0;
  92     TexEnv::Mode mode = TexEnv::MODULATE;
  93     findAttr(texEnvModes, modeProp, mode);
  94     if (mode == TexEnv::MODULATE) {
  95         return StateAttributeFactory::instance()->getStandardTexEnv();
  96     }
  97     TexEnv* env = new TexEnv(mode);
  98     if (colorProp)
  99         env->setColor(toOsg(colorProp->getValue<SGVec4d>()));
 100     return env;
 101 }
 102
 103
 104 void TextureUnitBuilder::buildAttribute(Effect* effect, Pass* pass,
 105                                         const SGPropertyNode* prop,
 106                                         const SGReaderWriterOptions* options)
 107 {
 108     if (!isAttributeActive(effect, prop))
 109         return;
 110     // Decode the texture unit
 111     int unit = 0;
 112     const SGPropertyNode* pUnit = prop->getChild("unit");
 113     if (pUnit) {
 114         unit = pUnit->getValue<int>();
 115     } else {
 116         const SGPropertyNode* pName = prop->getChild("name");
 117         if (pName)
 118             try {
 119                 unit = boost::lexical_cast<int>(pName->getStringValue());
 120             } catch (boost::bad_lexical_cast& lex) {
 121                 SG_LOG(SG_INPUT, SG_ALERT, "can't decode name as texture unit "
 122                        << lex.what());
 123             }
 124     }
 125     const SGPropertyNode* pType = getEffectPropertyChild(effect, prop, "type");
 126     string type;
 127     if (!pType)
 128         type = "2d";
 129     else
 130         type = pType->getStringValue();
 131     Texture* texture = 0;
 132     try {
 133         texture = TextureBuilder::buildFromType(effect, type, prop,
 134                                                 options);
 135     }
 136     catch (BuilderException& e) {
 137         SG_LOG(SG_INPUT, SG_ALERT, e.getFormattedMessage() << ", "
 138             << "maybe the reader did not set the filename attribute, "
 139             << "using white for type '" << type << "' on '" << pass->getName() << "', in " << prop->getPath() );
 140         texture = StateAttributeFactory::instance()->getWhiteTexture();
 141     }
 142     pass->setTextureAttributeAndModes(unit, texture);
 143     const SGPropertyNode* envProp = prop->getChild("environment");
 144     if (envProp) {
 145         TexEnv* env = buildTexEnv(effect, envProp);
 146         if (env)
 147             pass->setTextureAttributeAndModes(unit, env);
 148     }
 149     const SGPropertyNode* combineProp = prop->getChild("texenv-combine");
 150     TexEnvCombine* combiner = 0;
 151     if (combineProp && ((combiner = buildTexEnvCombine(effect, combineProp,
 152                                                        options))))
 153         pass->setTextureAttributeAndModes(unit, combiner);
 154     const SGPropertyNode* tgenProp = prop->getChild("texgen");
 155     TexGen* tgen = 0;
 156     if (tgenProp && (tgen = buildTexGen(effect, tgenProp)))
 157         pass->setTextureAttributeAndModes(unit, tgen);
 158 }
 159
 160 // InstallAttributeBuilder call is in Effect.cxx to force this file to
 161 // be linked in.
 162
 163 namespace
 164 {
 165 EffectNameValue<Texture::FilterMode> filterModesInit[] =
 166 {
 167     { "linear", Texture::LINEAR },
 168     { "linear-mipmap-linear", Texture::LINEAR_MIPMAP_LINEAR},
 169     { "linear-mipmap-nearest", Texture::LINEAR_MIPMAP_NEAREST},
 170     { "nearest", Texture::NEAREST},
 171     { "nearest-mipmap-linear", Texture::NEAREST_MIPMAP_LINEAR},
 172     { "nearest-mipmap-nearest", Texture::NEAREST_MIPMAP_NEAREST}
 173 };
 174 EffectPropertyMap<Texture::FilterMode> filterModes(filterModesInit);
 175
 176 EffectNameValue<Texture::WrapMode> wrapModesInit[] =
 177 {
 178     {"clamp", Texture::CLAMP},
 179     {"clamp-to-border", Texture::CLAMP_TO_BORDER},
 180     {"clamp-to-edge", Texture::CLAMP_TO_EDGE},
 181     {"mirror", Texture::MIRROR},
 182     {"repeat", Texture::REPEAT}
 183 };
 184 EffectPropertyMap<Texture::WrapMode> wrapModes(wrapModesInit);
 185
 186 TexTuple makeTexTuple(Effect* effect, const SGPropertyNode* props,
 187                       const SGReaderWriterOptions* options,
 188                       const string& texType)
 189 {
 190     Texture::FilterMode minFilter = Texture::LINEAR_MIPMAP_LINEAR;
 191     const SGPropertyNode* ep = 0;
 192     if ((ep = getEffectPropertyChild(effect, props, "filter")))
 193         findAttr(filterModes, ep, minFilter);
 194     Texture::FilterMode magFilter = Texture::LINEAR;
 195     if ((ep = getEffectPropertyChild(effect, props, "mag-filter")))
 196         findAttr(filterModes, ep, magFilter);
 197     const SGPropertyNode* pWrapS
 198         = getEffectPropertyChild(effect, props, "wrap-s");
 199     Texture::WrapMode sWrap = Texture::CLAMP;
 200     if (pWrapS)
 201         findAttr(wrapModes, pWrapS, sWrap);
 202     const SGPropertyNode* pWrapT
 203         = getEffectPropertyChild(effect, props, "wrap-t");
 204     Texture::WrapMode tWrap = Texture::CLAMP;
 205     if (pWrapT)
 206         findAttr(wrapModes, pWrapT, tWrap);
 207     const SGPropertyNode* pWrapR
 208         = getEffectPropertyChild(effect, props, "wrap-r");
 209     Texture::WrapMode rWrap = Texture::CLAMP;
 210     if (pWrapR)
 211         findAttr(wrapModes, pWrapR, rWrap);
 212     const SGPropertyNode* pImage
 213         = getEffectPropertyChild(effect, props, "image");
 214     string imageName;
 215     string absFileName;
 216     if (pImage)
 217     {
 218         imageName = pImage->getStringValue();
 219         absFileName = SGModelLib::findDataFile(imageName, options);
 220         if (absFileName.empty())
 221         {
 222             SG_LOG(SG_INPUT, SG_ALERT, "Texture file not found: '"
 223                    << imageName << "'");
 224         }
 225     }
 226
 227     const SGPropertyNode* pMipmapControl
 228         = getEffectPropertyChild(effect, props, "mipmap-control");
 229     MipMapTuple mipmapFunctions( AUTOMATIC, AUTOMATIC, AUTOMATIC, AUTOMATIC );
 230     if ( pMipmapControl )
 231         mipmapFunctions = makeMipMapTuple(effect, pMipmapControl, options);
 232
 233     return TexTuple(absFileName, minFilter, magFilter, sWrap, tWrap, rWrap,
 234                     texType, mipmapFunctions);
 235 }
 236
 237 void setAttrs(const TexTuple& attrs, Texture* tex,
 238               const SGReaderWriterOptions* options)
 239 {
 240     const string& imageName = attrs.get<0>();
 241     if (imageName.empty()) {
 242         throw BuilderException("no image file");
 243     } else {
 244         osgDB::ReaderWriter::ReadResult result;
 245         result = osgDB::readImageFile(imageName, options);
 246         if (result.success()) {
 247             osg::ref_ptr<osg::Image> image = result.getImage();
 248             image = computeMipmap( image.get(), attrs.get<7>() );
 249             tex->setImage(GL_FRONT_AND_BACK, image.get());
 250             int s = image->s();
 251             int t = image->t();
 252             if (s <= t && 32 <= s) {
 253                 SGSceneFeatures::instance()->setTextureCompression(tex);
 254             } else if (t < s && 32 <= t) {
 255                 SGSceneFeatures::instance()->setTextureCompression(tex);
 256             }
 257             tex->setMaxAnisotropy(SGSceneFeatures::instance()
 258                                   ->getTextureFilter());
 259         } else {
 260             SG_LOG(SG_INPUT, SG_ALERT, "failed to load effect texture file "
 261                    << imageName);
 262         }
 263     }
 264     // texture->setDataVariance(osg::Object::STATIC);
 265     tex->setFilter(Texture::MIN_FILTER, attrs.get<1>());
 266     tex->setFilter(Texture::MAG_FILTER, attrs.get<2>());
 267     tex->setWrap(Texture::WRAP_S, attrs.get<3>());
 268     tex->setWrap(Texture::WRAP_T, attrs.get<4>());
 269     tex->setWrap(Texture::WRAP_R, attrs.get<5>());
 270 }
 271 }
 272
 273 template<typename T>
 274 class TexBuilder : public TextureBuilder
 275 {
 276 public:
 277     TexBuilder(const string& texType) : _type(texType) {}
 278     Texture* build(Effect* effect, const SGPropertyNode*,
 279                    const SGReaderWriterOptions* options);
 280 protected:
 281     typedef map<TexTuple, ref_ptr<T> > TexMap;
 282     TexMap texMap;
 283     const string _type;
 284 };
 285
 286 template<typename T>
 287 Texture* TexBuilder<T>::build(Effect* effect, const SGPropertyNode* props,
 288                               const SGReaderWriterOptions* options)
 289 {
 290     TexTuple attrs = makeTexTuple(effect, props, options, _type);
 291     typename TexMap::iterator itr = texMap.find(attrs);
 292     if (itr != texMap.end())
 293         return itr->second.get();
 294     T* tex = new T;
 295     setAttrs(attrs, tex, options);
 296     texMap.insert(make_pair(attrs, tex));
 297     return tex;
 298 }
 299
 300
 301 namespace
 302 {
 303 TextureBuilder::Registrar install1D("1d", new TexBuilder<Texture1D>("1d"));
 304 TextureBuilder::Registrar install2D("2d", new TexBuilder<Texture2D>("2d"));
 305 TextureBuilder::Registrar install3D("3d", new TexBuilder<Texture3D>("3d"));
 306 }
 307
 308 class WhiteTextureBuilder : public TextureBuilder
 309 {
 310 public:
 311     Texture* build(Effect* effect, const SGPropertyNode*,
 312                    const SGReaderWriterOptions* options);
 313 };
 314
 315 Texture* WhiteTextureBuilder::build(Effect* effect, const SGPropertyNode*,
 316                                     const SGReaderWriterOptions* options)
 317 {
 318     return StateAttributeFactory::instance()->getWhiteTexture();
 319 }
 320
 321 namespace
 322 {
 323 TextureBuilder::Registrar installWhite("white", new WhiteTextureBuilder);
 324 }
 325
 326 class TransparentTextureBuilder : public TextureBuilder
 327 {
 328 public:
 329     Texture* build(Effect* effect, const SGPropertyNode*,
 330                    const SGReaderWriterOptions* options);
 331 };
 332
 333 Texture* TransparentTextureBuilder::build(Effect* effect, const SGPropertyNode*,
 334                                     const SGReaderWriterOptions* options)
 335 {
 336     return StateAttributeFactory::instance()->getTransparentTexture();
 337 }
 338
 339 namespace
 340 {
 341 TextureBuilder::Registrar installTransparent("transparent",
 342                                              new TransparentTextureBuilder);
 343 }
 344
 345 osg::Image* make3DNoiseImage(int texSize)
 346 {
 347     osg::Image* image = new osg::Image;
 348     image->setImage(texSize, texSize, texSize,
 349                     4, GL_RGBA, GL_UNSIGNED_BYTE,
 350                     new unsigned char[4 * texSize * texSize * texSize],
 351                     osg::Image::USE_NEW_DELETE);
 352
 353     const int startFrequency = 4;
 354     const int numOctaves = 4;
 355
 356     int f, i, j, k, inc;
 357     double ni[3];
 358     double inci, incj, inck;
 359     int frequency = startFrequency;
 360     GLubyte *ptr;
 361     double amp = 0.5;
 362
 363     osg::notify(osg::WARN) << "creating 3D noise texture... ";
 364
 365     for (f = 0, inc = 0; f < numOctaves; ++f, frequency *= 2, ++inc, amp *= 0.5)
 366     {
 367         SetNoiseFrequency(frequency);
 368         ptr = image->data();
 369         ni[0] = ni[1] = ni[2] = 0;
 370
 371         inci = 1.0 / (texSize / frequency);
 372         for (i = 0; i < texSize; ++i, ni[0] += inci)
 373         {
 374             incj = 1.0 / (texSize / frequency);
 375             for (j = 0; j < texSize; ++j, ni[1] += incj)
 376             {
 377                 inck = 1.0 / (texSize / frequency);
 378                 for (k = 0; k < texSize; ++k, ni[2] += inck, ptr += 4)
 379                 {
 380                     *(ptr+inc) = (GLubyte) (((noise3(ni) + 1.0) * amp) * 128.0);
 381                 }
 382             }
 383         }
 384     }
 385
 386     osg::notify(osg::WARN) << "DONE" << std::endl;
 387     return image;
 388 }
 389
 390 class NoiseBuilder : public TextureBuilder
 391 {
 392 public:
 393     Texture* build(Effect* effect, const SGPropertyNode*,
 394                    const SGReaderWriterOptions* options);
 395 protected:
 396     typedef map<int, ref_ptr<Texture3D> > NoiseMap;
 397     NoiseMap _noises;
 398 };
 399
 400 Texture* NoiseBuilder::build(Effect* effect, const SGPropertyNode* props,
 401                              const SGReaderWriterOptions* options)
 402 {
 403     int texSize = 64;
 404     const SGPropertyNode* sizeProp = getEffectPropertyChild(effect, props,
 405                                                             "size");
 406     if (sizeProp)
 407         texSize = sizeProp->getValue<int>();
 408     NoiseMap::iterator itr = _noises.find(texSize);
 409     if (itr != _noises.end())
 410         return itr->second.get();
 411     Texture3D* noiseTexture = new osg::Texture3D;
 412     noiseTexture->setFilter(osg::Texture3D::MIN_FILTER, osg::Texture3D::LINEAR);
 413     noiseTexture->setFilter(osg::Texture3D::MAG_FILTER, osg::Texture3D::LINEAR);
 414     noiseTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture3D::REPEAT);
 415     noiseTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture3D::REPEAT);
 416     noiseTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture3D::REPEAT);
 417     noiseTexture->setImage( make3DNoiseImage(texSize) );
 418     _noises.insert(make_pair(texSize, noiseTexture));
 419     return noiseTexture;
 420 }
 421
 422 namespace
 423 {
 424 TextureBuilder::Registrar installNoise("noise", new NoiseBuilder);
 425 }
 426
 427
 428
 429 // Image names for all sides
 430 typedef boost::tuple<string, string, string, string, string, string> CubeMapTuple;
 431
 432 CubeMapTuple makeCubeMapTuple(Effect* effect, const SGPropertyNode* props)
 433 {
 434     const SGPropertyNode* ep = 0;
 435
 436     string positive_x;
 437     if ((ep = getEffectPropertyChild(effect, props, "positive-x")))
 438         positive_x = ep->getStringValue();
 439     string negative_x;
 440     if ((ep = getEffectPropertyChild(effect, props, "negative-x")))
 441         negative_x = ep->getStringValue();
 442     string positive_y;
 443     if ((ep = getEffectPropertyChild(effect, props, "positive-y")))
 444         positive_y = ep->getStringValue();
 445     string negative_y;
 446     if ((ep = getEffectPropertyChild(effect, props, "negative-y")))
 447         negative_y = ep->getStringValue();
 448     string positive_z;
 449     if ((ep = getEffectPropertyChild(effect, props, "positive-z")))
 450         positive_z = ep->getStringValue();
 451     string negative_z;
 452     if ((ep = getEffectPropertyChild(effect, props, "negative-z")))
 453         negative_z = ep->getStringValue();
 454     return CubeMapTuple(positive_x, negative_x, positive_y, negative_y, positive_z, negative_z);
 455 }
 456
 457
 458 class CubeMapBuilder : public TextureBuilder
 459 {
 460 public:
 461     Texture* build(Effect* effect, const SGPropertyNode*,
 462                    const SGReaderWriterOptions* options);
 463 protected:
 464     typedef map<CubeMapTuple, ref_ptr<TextureCubeMap> > CubeMap;
 465     typedef map<string, ref_ptr<TextureCubeMap> > CrossCubeMap;
 466     CubeMap _cubemaps;
 467     CrossCubeMap _crossmaps;
 468 };
 469
 470 // I use this until osg::CopyImage is fixed
 471 // This one assumes images are the same format and sizes are correct
 472 void copySubImage(const osg::Image* srcImage, int src_s, int src_t, int width, int height,
 473                  osg::Image* destImage, int dest_s, int dest_t)
 474 {
 475     for(int row = 0; row<height; ++row)
 476     {
 477         const unsigned char* srcData = srcImage->data(src_s, src_t+row, 0);
 478         unsigned char* destData = destImage->data(dest_s, dest_t+row, 0);
 479         memcpy(destData, srcData, (width*destImage->getPixelSizeInBits())/8);
 480     }
 481 }
 482
 483
 484 Texture* CubeMapBuilder::build(Effect* effect, const SGPropertyNode* props,
 485                                const SGReaderWriterOptions* options)
 486 {
 487     // First check that there is a <images> tag
 488     const SGPropertyNode* texturesProp = getEffectPropertyChild(effect, props, "images");
 489     const SGPropertyNode* crossProp = getEffectPropertyChild(effect, props, "image");
 490     if (!texturesProp && !crossProp) {
 491         throw BuilderException("no images defined for cube map");
 492         return NULL; // This is redundant
 493     }
 494
 495     // Using 6 separate images
 496     if(texturesProp) {
 497
 498         SG_LOG(SG_INPUT, SG_DEBUG, "try 6 images ");
 499
 500         CubeMapTuple _tuple = makeCubeMapTuple(effect, texturesProp);
 501
 502         CubeMap::iterator itr = _cubemaps.find(_tuple);
 503         if (itr != _cubemaps.end())
 504             return itr->second.get();
 505
 506         TextureCubeMap* cubeTexture = new osg::TextureCubeMap;
 507
 508         // TODO: Read these from effect file? Maybe these are sane for all cuebmaps?
 509         cubeTexture->setFilter(osg::Texture3D::MIN_FILTER, osg::Texture::LINEAR_MIPMAP_LINEAR);
 510         cubeTexture->setFilter(osg::Texture3D::MAG_FILTER, osg::Texture::LINEAR);
 511         cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 512         cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 513         cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 514
 515         osgDB::ReaderWriter::ReadResult result;
 516         result = osgDB::readImageFile(_tuple.get<0>(), options);
 517         if(result.success()) {
 518             osg::Image* image = result.getImage();
 519             cubeTexture->setImage(TextureCubeMap::POSITIVE_X, image);
 520         }
 521         result = osgDB::readImageFile(_tuple.get<1>(), options);
 522         if(result.success()) {
 523             osg::Image* image = result.getImage();
 524             cubeTexture->setImage(TextureCubeMap::NEGATIVE_X, image);
 525         }
 526         result = osgDB::readImageFile(_tuple.get<2>(), options);
 527         if(result.success()) {
 528             osg::Image* image = result.getImage();
 529             cubeTexture->setImage(TextureCubeMap::POSITIVE_Y, image);
 530         }
 531         result = osgDB::readImageFile(_tuple.get<3>(), options);
 532         if(result.success()) {
 533             osg::Image* image = result.getImage();
 534             cubeTexture->setImage(TextureCubeMap::NEGATIVE_Y, image);
 535         }
 536         result = osgDB::readImageFile(_tuple.get<4>(), options);
 537         if(result.success()) {
 538             osg::Image* image = result.getImage();
 539             cubeTexture->setImage(TextureCubeMap::POSITIVE_Z, image);
 540         }
 541         result = osgDB::readImageFile(_tuple.get<5>(), options);
 542         if(result.success()) {
 543             osg::Image* image = result.getImage();
 544             cubeTexture->setImage(TextureCubeMap::NEGATIVE_Z, image);
 545         }
 546
 547         _cubemaps[_tuple] = cubeTexture;
 548
 549         return cubeTexture;
 550     }
 551
 552
 553     // Using 1 cross image
 554     else if(crossProp) {
 555         SG_LOG(SG_INPUT, SG_DEBUG, "try cross map ");
 556
 557         std::string texname = crossProp->getStringValue();
 558
 559         // Try to find existing cube map
 560         CrossCubeMap::iterator itr = _crossmaps.find(texname);
 561         if (itr != _crossmaps.end())
 562             return itr->second.get();
 563
 564         osgDB::ReaderWriter::ReadResult result;
 565         result = osgDB::readImageFile(texname, options);
 566         if(result.success()) {
 567             osg::Image* image = result.getImage();
 568             image->flipVertical();   // Seems like the image coordinates are somewhat funny, flip to get better ones
 569
 570             //cubeTexture->setResizeNonPowerOfTwoHint(false);
 571
 572             // Size of a single image, 4 rows and 3 columns
 573             int width = image->s() / 3;
 574             int height = image->t() / 4;
 575             int depth = image->r();
 576
 577             TextureCubeMap* cubeTexture = new osg::TextureCubeMap;
 578
 579             // Copy the 6 sub-images and push them
 580             for(int n=0; n<6; n++) {
 581
 582                 SG_LOG(SG_INPUT, SG_DEBUG, "Copying the " << n << "th sub-images and pushing it" );
 583
 584                 osg::ref_ptr<osg::Image> subimg = new osg::Image();
 585                 subimg->allocateImage(width, height, depth, image->getPixelFormat(), image->getDataType());  // Copy attributes
 586
 587                 // Choose correct image
 588                 switch(n) {
 589                 case 0:  // Front
 590                     copySubImage(image, width, 0, width, height, subimg.get(), 0, 0);
 591                     cubeTexture->setImage(TextureCubeMap::POSITIVE_Y, subimg.get());
 592                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 593                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 594                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 595                     break;
 596                 case 1:  // Left
 597                     copySubImage(image, 0, height, width, height, subimg.get(), 0, 0);
 598                     cubeTexture->setImage(TextureCubeMap::NEGATIVE_X, subimg.get());
 599                     cubeTexture->setWrap(osg::Texture2D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 600                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 601                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 602                     break;
 603                 case 2:  // Top
 604                     copySubImage(image, width, height, width, height, subimg.get(), 0, 0);
 605                     cubeTexture->setImage(TextureCubeMap::POSITIVE_Z, subimg.get());
 606                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 607                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 608                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 609                     break;
 610                 case 3:  // Right
 611                     copySubImage(image, width*2, height, width, height, subimg.get(), 0, 0);
 612                     cubeTexture->setImage(TextureCubeMap::POSITIVE_X, subimg.get());
 613                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 614                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 615                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 616                     break;
 617                 case 4:  // Back
 618                     copySubImage(image, width, height*2, width, height, subimg.get(), 0, 0);
 619                     cubeTexture->setImage(TextureCubeMap::NEGATIVE_Y, subimg.get());
 620                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 621                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 622                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 623                     break;
 624                 case 5:  // Bottom
 625                     copySubImage(image, width, height*3, width, height, subimg.get(), 0, 0);
 626                     cubeTexture->setImage(TextureCubeMap::NEGATIVE_Z, subimg.get());
 627                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 628                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 629                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 630                     break;
 631                 };
 632
 633             }
 634
 635             _crossmaps[texname] = cubeTexture;
 636
 637             return cubeTexture;
 638
 639         } else {
 640             throw BuilderException("Could not load cube cross");
 641         }
 642     }
 643
 644     return NULL;
 645 }
 646
 647 namespace {
 648 TextureBuilder::Registrar installCubeMap("cubemap", new CubeMapBuilder);
 649 }
 650
 651 EffectNameValue<TexEnvCombine::CombineParam> combineParamInit[] =
 652 {
 653     {"replace", TexEnvCombine::REPLACE},
 654     {"modulate", TexEnvCombine::MODULATE},
 655     {"add", TexEnvCombine::ADD},
 656     {"add-signed", TexEnvCombine::ADD_SIGNED},
 657     {"interpolate", TexEnvCombine::INTERPOLATE},
 658     {"subtract", TexEnvCombine::SUBTRACT},
 659     {"dot3-rgb", TexEnvCombine::DOT3_RGB},
 660     {"dot3-rgba", TexEnvCombine::DOT3_RGBA}
 661 };
 662
 663 EffectPropertyMap<TexEnvCombine::CombineParam> combineParams(combineParamInit);
 664
 665 EffectNameValue<TexEnvCombine::SourceParam> sourceParamInit[] =
 666 {
 667     {"constant", TexEnvCombine::CONSTANT},
 668     {"primary_color", TexEnvCombine::PRIMARY_COLOR},
 669     {"previous", TexEnvCombine::PREVIOUS},
 670     {"texture", TexEnvCombine::TEXTURE},
 671     {"texture0", TexEnvCombine::TEXTURE0},
 672     {"texture1", TexEnvCombine::TEXTURE1},
 673     {"texture2", TexEnvCombine::TEXTURE2},
 674     {"texture3", TexEnvCombine::TEXTURE3},
 675     {"texture4", TexEnvCombine::TEXTURE4},
 676     {"texture5", TexEnvCombine::TEXTURE5},
 677     {"texture6", TexEnvCombine::TEXTURE6},
 678     {"texture7", TexEnvCombine::TEXTURE7}
 679 };
 680
 681 EffectPropertyMap<TexEnvCombine::SourceParam> sourceParams(sourceParamInit);
 682
 683 EffectNameValue<TexEnvCombine::OperandParam> opParamInit[] =
 684 {
 685     {"src-color", TexEnvCombine::SRC_COLOR},
 686     {"one-minus-src-color", TexEnvCombine::ONE_MINUS_SRC_COLOR},
 687     {"src-alpha", TexEnvCombine::SRC_ALPHA},
 688     {"one-minus-src-alpha", TexEnvCombine::ONE_MINUS_SRC_ALPHA}
 689 };
 690
 691 EffectPropertyMap<TexEnvCombine::OperandParam> operandParams(opParamInit);
 692
 693 TexEnvCombine* buildTexEnvCombine(Effect* effect, const SGPropertyNode* envProp,
 694                                   const SGReaderWriterOptions* options)
 695 {
 696     if (!isAttributeActive(effect, envProp))
 697         return 0;
 698     TexEnvCombine* result = new TexEnvCombine;
 699     const SGPropertyNode* p = 0;
 700     if ((p = getEffectPropertyChild(effect, envProp, "combine-rgb"))) {
 701         TexEnvCombine::CombineParam crgb = TexEnvCombine::MODULATE;
 702         findAttr(combineParams, p, crgb);
 703         result->setCombine_RGB(crgb);
 704     }
 705     if ((p = getEffectPropertyChild(effect, envProp, "combine-alpha"))) {
 706         TexEnvCombine::CombineParam calpha = TexEnvCombine::MODULATE;
 707         findAttr(combineParams, p, calpha);
 708         result->setCombine_Alpha(calpha);
 709     }
 710     if ((p = getEffectPropertyChild(effect, envProp, "source0-rgb"))) {
 711         TexEnvCombine::SourceParam source = TexEnvCombine::TEXTURE;
 712         findAttr(sourceParams, p, source);
 713         result->setSource0_RGB(source);
 714     }
 715     if ((p = getEffectPropertyChild(effect, envProp, "source1-rgb"))) {
 716         TexEnvCombine::SourceParam source = TexEnvCombine::PREVIOUS;
 717         findAttr(sourceParams, p, source);
 718         result->setSource1_RGB(source);
 719     }
 720     if ((p = getEffectPropertyChild(effect, envProp, "source2-rgb"))) {
 721         TexEnvCombine::SourceParam source = TexEnvCombine::CONSTANT;
 722         findAttr(sourceParams, p, source);
 723         result->setSource2_RGB(source);
 724     }
 725     if ((p = getEffectPropertyChild(effect, envProp, "source0-alpha"))) {
 726         TexEnvCombine::SourceParam source = TexEnvCombine::TEXTURE;
 727         findAttr(sourceParams, p, source);
 728         result->setSource0_Alpha(source);
 729     }
 730     if ((p = getEffectPropertyChild(effect, envProp, "source1-alpha"))) {
 731         TexEnvCombine::SourceParam source = TexEnvCombine::PREVIOUS;
 732         findAttr(sourceParams, p, source);
 733         result->setSource1_Alpha(source);
 734     }
 735     if ((p = getEffectPropertyChild(effect, envProp, "source2-alpha"))) {
 736         TexEnvCombine::SourceParam source = TexEnvCombine::CONSTANT;
 737         findAttr(sourceParams, p, source);
 738         result->setSource2_Alpha(source);
 739     }
 740     if ((p = getEffectPropertyChild(effect, envProp, "operand0-rgb"))) {
 741         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_COLOR;
 742         findAttr(operandParams, p, op);
 743         result->setOperand0_RGB(op);
 744     }
 745     if ((p = getEffectPropertyChild(effect, envProp, "operand1-rgb"))) {
 746         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_COLOR;
 747         findAttr(operandParams, p, op);
 748         result->setOperand1_RGB(op);
 749     }
 750     if ((p = getEffectPropertyChild(effect, envProp, "operand2-rgb"))) {
 751         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 752         findAttr(operandParams, p, op);
 753         result->setOperand2_RGB(op);
 754     }
 755     if ((p = getEffectPropertyChild(effect, envProp, "operand0-alpha"))) {
 756         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 757         findAttr(operandParams, p, op);
 758         result->setOperand0_Alpha(op);
 759     }
 760     if ((p = getEffectPropertyChild(effect, envProp, "operand1-alpha"))) {
 761         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 762         findAttr(operandParams, p, op);
 763         result->setOperand1_Alpha(op);
 764     }
 765     if ((p = getEffectPropertyChild(effect, envProp, "operand2-alpha"))) {
 766         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 767         findAttr(operandParams, p, op);
 768         result->setOperand2_Alpha(op);
 769     }
 770     if ((p = getEffectPropertyChild(effect, envProp, "scale-rgb"))) {
 771         result->setScale_RGB(p->getValue<float>());
 772     }
 773     if ((p = getEffectPropertyChild(effect, envProp, "scale-alpha"))) {
 774         result->setScale_Alpha(p->getValue<float>());
 775     }
 776 #if 0
 777     if ((p = getEffectPropertyChild(effect, envProp, "constant-color"))) {
 778         SGVec4d color = p->getValue<SGVec4d>();
 779         result->setConstantColor(toOsg(color));
 780     } else if ((p = getEffectPropertyChild(effect, envProp,
 781                                            "light-direction"))) {
 782         SGVec3d direction = p->getValue<SGVec3d>();
 783         result->setConstantColorAsLightDirection(toOsg(direction));
 784     }
 785 #endif
 786     const SGPropertyNode* colorNode = envProp->getChild("constant-color");
 787     if (colorNode)
 788         initFromParameters(effect, colorNode, result,
 789                            &TexEnvCombine::setConstantColor, colorFields,
 790                            options);
 791     return result;
 792 }
 793
 794 EffectNameValue<TexGen::Mode> tgenModeInit[] =
 795 {
 796     { "object-linear", TexGen::OBJECT_LINEAR},
 797     { "eye-linear", TexGen::EYE_LINEAR},
 798     { "sphere-map", TexGen::SPHERE_MAP},
 799     { "normal-map", TexGen::NORMAL_MAP},
 800     { "reflection-map", TexGen::REFLECTION_MAP}
 801 };
 802
 803 EffectPropertyMap<TexGen::Mode> tgenModes(tgenModeInit);
 804
 805 EffectNameValue<TexGen::Coord> tgenCoordInit[] =
 806 {
 807     {"s", TexGen::S},
 808     {"t", TexGen::T},
 809     {"r", TexGen::R},
 810     {"q", TexGen::Q}
 811 };
 812
 813 EffectPropertyMap<TexGen::Coord> tgenCoords(tgenCoordInit);
 814
 815 TexGen* buildTexGen(Effect* effect, const SGPropertyNode* tgenProp)
 816 {
 817     if (!isAttributeActive(effect, tgenProp))
 818         return 0;
 819     TexGen* result = new TexGen;
 820     TexGen::Mode mode = TexGen::OBJECT_LINEAR;
 821     findAttr(tgenModes, getEffectPropertyChild(effect, tgenProp, "mode"), mode);
 822     result->setMode(mode);
 823     const SGPropertyNode* planesNode = tgenProp->getChild("planes");
 824     if (planesNode) {
 825         for (int i = 0; i < planesNode->nChildren(); ++i) {
 826             const SGPropertyNode* planeNode = planesNode->getChild(i);
 827             TexGen::Coord coord;
 828             findAttr(tgenCoords, planeNode->getName(), coord);
 829             const SGPropertyNode* realNode
 830                 = getEffectPropertyNode(effect, planeNode);
 831             SGVec4d plane = realNode->getValue<SGVec4d>();
 832             result->setPlane(coord, toOsg(plane));
 833         }
 834     }
 835     return result;
 836 }
 837
 838 bool makeTextureParameters(SGPropertyNode* paramRoot, const StateSet* ss)
 839 {
 840     SGPropertyNode* texUnit = makeChild(paramRoot, "texture");
 841     const Texture* tex = getStateAttribute<Texture>(0, ss);
 842     const Texture2D* texture = dynamic_cast<const Texture2D*>(tex);
 843     makeChild(texUnit, "unit")->setValue(0);
 844     if (!tex) {
 845         // The default shader-based technique ignores active
 846         makeChild(texUnit, "active")->setValue(false);
 847         return false;
 848     }
 849     const Image* image = texture->getImage();
 850     string imageName;
 851     if (image) {
 852         imageName = image->getFileName();
 853     } else {
 854         makeChild(texUnit, "active")->setValue(false);
 855         makeChild(texUnit, "type")->setValue("white");
 856         return false;
 857     }
 858     makeChild(texUnit, "active")->setValue(true);
 859     makeChild(texUnit, "type")->setValue("2d");
 860     string filter = findName(filterModes,
 861                              texture->getFilter(Texture::MIN_FILTER));
 862     string magFilter = findName(filterModes,
 863                              texture->getFilter(Texture::MAG_FILTER));
 864     string wrapS = findName(wrapModes, texture->getWrap(Texture::WRAP_S));
 865     string wrapT = findName(wrapModes, texture->getWrap(Texture::WRAP_T));
 866     string wrapR = findName(wrapModes, texture->getWrap(Texture::WRAP_R));
 867     makeChild(texUnit, "image")->setStringValue(imageName);
 868     makeChild(texUnit, "filter")->setStringValue(filter);
 869     makeChild(texUnit, "mag-filter")->setStringValue(magFilter);
 870     makeChild(texUnit, "wrap-s")->setStringValue(wrapS);
 871     makeChild(texUnit, "wrap-t")->setStringValue(wrapT);
 872     makeChild(texUnit, "wrap-r")->setStringValue(wrapR);
 873     return true;
 874 }
 875
 876 }