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
  36 #include <boost/lexical_cast.hpp>
  37 #include <boost/tuple/tuple.hpp>
  38 #include <boost/tuple/tuple_comparison.hpp>
  39
  40 #include <simgear/scene/model/SGReaderWriterXMLOptions.hxx>
  41 #include <simgear/scene/util/SGSceneFeatures.hxx>
  42 #include <simgear/scene/util/StateAttributeFactory.hxx>
  43 #include <simgear/math/SGMath.hxx>
  44 #include <simgear/structure/OSGUtils.hxx>
  45
  46 #include "Noise.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 SGReaderWriterXMLOptions* 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, const string& type,
  62                                             const SGPropertyNode*props,
  63                                             const SGReaderWriterXMLOptions*
  64                                             options)
  65 {
  66     return EffectBuilder<Texture>::buildFromType(effect, 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 SGReaderWriterXMLOptions* 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, type, prop,
 133                                                 options);
 134     }
 135     catch (BuilderException& e) {
 136         SG_LOG(SG_INPUT, SG_ALERT, 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 SGReaderWriterXMLOptions* 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 SGReaderWriterXMLOptions* 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             = osgDB::Registry::instance()->readImage(imageName, options);
 245         if (result.success()) {
 246             osg::ref_ptr<osg::Image> image = result.getImage();
 247             image = computeMipmap( image.get(), attrs.get<7>() );
 248             tex->setImage(GL_FRONT_AND_BACK, image.get());
 249             int s = image->s();
 250             int t = image->t();
 251             if (s <= t && 32 <= s) {
 252                 SGSceneFeatures::instance()->setTextureCompression(tex);
 253             } else if (t < s && 32 <= t) {
 254                 SGSceneFeatures::instance()->setTextureCompression(tex);
 255             }
 256             tex->setMaxAnisotropy(SGSceneFeatures::instance()
 257                                   ->getTextureFilter());
 258         } else {
 259             SG_LOG(SG_INPUT, SG_ALERT, "failed to load effect texture file "
 260                    << imageName);
 261         }
 262     }
 263     // texture->setDataVariance(osg::Object::STATIC);
 264     tex->setFilter(Texture::MIN_FILTER, attrs.get<1>());
 265     tex->setFilter(Texture::MAG_FILTER, attrs.get<2>());
 266     tex->setWrap(Texture::WRAP_S, attrs.get<3>());
 267     tex->setWrap(Texture::WRAP_T, attrs.get<4>());
 268     tex->setWrap(Texture::WRAP_R, attrs.get<5>());
 269 }
 270 }
 271
 272 template<typename T>
 273 class TexBuilder : public TextureBuilder
 274 {
 275 public:
 276     TexBuilder(const string& texType) : _type(texType) {}
 277     Texture* build(Effect* effect, const SGPropertyNode*,
 278                    const SGReaderWriterXMLOptions* options);
 279 protected:
 280     typedef map<TexTuple, ref_ptr<T> > TexMap;
 281     TexMap texMap;
 282     const string _type;
 283 };
 284
 285 template<typename T>
 286 Texture* TexBuilder<T>::build(Effect* effect, const SGPropertyNode* props,
 287                               const SGReaderWriterXMLOptions* options)
 288 {
 289     TexTuple attrs = makeTexTuple(effect, props, options, _type);
 290     typename TexMap::iterator itr = texMap.find(attrs);
 291     if (itr != texMap.end())
 292         return itr->second.get();
 293     T* tex = new T;
 294     setAttrs(attrs, tex, options);
 295     texMap.insert(make_pair(attrs, tex));
 296     return tex;
 297 }
 298
 299
 300 namespace
 301 {
 302 TextureBuilder::Registrar install1D("1d", new TexBuilder<Texture1D>("1d"));
 303 TextureBuilder::Registrar install2D("2d", new TexBuilder<Texture2D>("2d"));
 304 TextureBuilder::Registrar install3D("3d", new TexBuilder<Texture3D>("3d"));
 305 }
 306
 307 class WhiteTextureBuilder : public TextureBuilder
 308 {
 309 public:
 310     Texture* build(Effect* effect, const SGPropertyNode*,
 311                    const SGReaderWriterXMLOptions* options);
 312 };
 313
 314 Texture* WhiteTextureBuilder::build(Effect* effect, const SGPropertyNode*,
 315                                     const SGReaderWriterXMLOptions* options)
 316 {
 317     return StateAttributeFactory::instance()->getWhiteTexture();
 318 }
 319
 320 namespace
 321 {
 322 TextureBuilder::Registrar installWhite("white", new WhiteTextureBuilder);
 323 }
 324
 325 class TransparentTextureBuilder : public TextureBuilder
 326 {
 327 public:
 328     Texture* build(Effect* effect, const SGPropertyNode*,
 329                    const SGReaderWriterXMLOptions* options);
 330 };
 331
 332 Texture* TransparentTextureBuilder::build(Effect* effect, const SGPropertyNode*,
 333                                     const SGReaderWriterXMLOptions* options)
 334 {
 335     return StateAttributeFactory::instance()->getTransparentTexture();
 336 }
 337
 338 namespace
 339 {
 340 TextureBuilder::Registrar installTransparent("transparent",
 341                                              new TransparentTextureBuilder);
 342 }
 343
 344 osg::Image* make3DNoiseImage(int texSize)
 345 {
 346     osg::Image* image = new osg::Image;
 347     image->setImage(texSize, texSize, texSize,
 348                     4, GL_RGBA, GL_UNSIGNED_BYTE,
 349                     new unsigned char[4 * texSize * texSize * texSize],
 350                     osg::Image::USE_NEW_DELETE);
 351
 352     const int startFrequency = 4;
 353     const int numOctaves = 4;
 354
 355     int f, i, j, k, inc;
 356     double ni[3];
 357     double inci, incj, inck;
 358     int frequency = startFrequency;
 359     GLubyte *ptr;
 360     double amp = 0.5;
 361
 362     osg::notify(osg::WARN) << "creating 3D noise texture... ";
 363
 364     for (f = 0, inc = 0; f < numOctaves; ++f, frequency *= 2, ++inc, amp *= 0.5)
 365     {
 366         SetNoiseFrequency(frequency);
 367         ptr = image->data();
 368         ni[0] = ni[1] = ni[2] = 0;
 369
 370         inci = 1.0 / (texSize / frequency);
 371         for (i = 0; i < texSize; ++i, ni[0] += inci)
 372         {
 373             incj = 1.0 / (texSize / frequency);
 374             for (j = 0; j < texSize; ++j, ni[1] += incj)
 375             {
 376                 inck = 1.0 / (texSize / frequency);
 377                 for (k = 0; k < texSize; ++k, ni[2] += inck, ptr += 4)
 378                 {
 379                     *(ptr+inc) = (GLubyte) (((noise3(ni) + 1.0) * amp) * 128.0);
 380                 }
 381             }
 382         }
 383     }
 384
 385     osg::notify(osg::WARN) << "DONE" << std::endl;
 386     return image;
 387 }
 388
 389 class NoiseBuilder : public TextureBuilder
 390 {
 391 public:
 392     Texture* build(Effect* effect, const SGPropertyNode*,
 393                    const SGReaderWriterXMLOptions* options);
 394 protected:
 395     typedef map<int, ref_ptr<Texture3D> > NoiseMap;
 396     NoiseMap _noises;
 397 };
 398
 399 Texture* NoiseBuilder::build(Effect* effect, const SGPropertyNode* props,
 400                              const SGReaderWriterXMLOptions* options)
 401 {
 402     int texSize = 64;
 403     const SGPropertyNode* sizeProp = getEffectPropertyChild(effect, props,
 404                                                             "size");
 405     if (sizeProp)
 406         texSize = sizeProp->getValue<int>();
 407     NoiseMap::iterator itr = _noises.find(texSize);
 408     if (itr != _noises.end())
 409         return itr->second.get();
 410     Texture3D* noiseTexture = new osg::Texture3D;
 411     noiseTexture->setFilter(osg::Texture3D::MIN_FILTER, osg::Texture3D::LINEAR);
 412     noiseTexture->setFilter(osg::Texture3D::MAG_FILTER, osg::Texture3D::LINEAR);
 413     noiseTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture3D::REPEAT);
 414     noiseTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture3D::REPEAT);
 415     noiseTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture3D::REPEAT);
 416     noiseTexture->setImage( make3DNoiseImage(texSize) );
 417     _noises.insert(make_pair(texSize, noiseTexture));
 418     return noiseTexture;
 419 }
 420
 421 namespace
 422 {
 423 TextureBuilder::Registrar installNoise("noise", new NoiseBuilder);
 424 }
 425
 426
 427
 428 // Image names for all sides
 429 typedef boost::tuple<string, string, string, string, string, string> CubeMapTuple;
 430
 431 CubeMapTuple makeCubeMapTuple(Effect* effect, const SGPropertyNode* props)
 432 {
 433     const SGPropertyNode* ep = 0;
 434
 435     string positive_x;
 436     if ((ep = getEffectPropertyChild(effect, props, "positive-x")))
 437         positive_x = ep->getStringValue();
 438     string negative_x;
 439     if ((ep = getEffectPropertyChild(effect, props, "negative-x")))
 440         negative_x = ep->getStringValue();
 441     string positive_y;
 442     if ((ep = getEffectPropertyChild(effect, props, "positive-y")))
 443         positive_y = ep->getStringValue();
 444     string negative_y;
 445     if ((ep = getEffectPropertyChild(effect, props, "negative-y")))
 446         negative_y = ep->getStringValue();
 447     string positive_z;
 448     if ((ep = getEffectPropertyChild(effect, props, "positive-z")))
 449         positive_z = ep->getStringValue();
 450     string negative_z;
 451     if ((ep = getEffectPropertyChild(effect, props, "negative-z")))
 452         negative_z = ep->getStringValue();
 453     return CubeMapTuple(positive_x, negative_x, positive_y, negative_y, positive_z, negative_z);
 454 }
 455
 456
 457 class CubeMapBuilder : public TextureBuilder
 458 {
 459 public:
 460     Texture* build(Effect* effect, const SGPropertyNode*,
 461                    const SGReaderWriterXMLOptions* options);
 462 protected:
 463     typedef map<CubeMapTuple, ref_ptr<TextureCubeMap> > CubeMap;
 464     typedef map<string, ref_ptr<TextureCubeMap> > CrossCubeMap;
 465     CubeMap _cubemaps;
 466     CrossCubeMap _crossmaps;
 467 };
 468
 469 // I use this until osg::CopyImage is fixed
 470 // This one assumes images are the same format and sizes are correct
 471 void copySubImage(const osg::Image* srcImage, int src_s, int src_t, int width, int height,
 472                  osg::Image* destImage, int dest_s, int dest_t)
 473 {
 474     for(int row = 0; row<height; ++row)
 475     {
 476         const unsigned char* srcData = srcImage->data(src_s, src_t+row, 0);
 477         unsigned char* destData = destImage->data(dest_s, dest_t+row, 0);
 478         memcpy(destData, srcData, (width*destImage->getPixelSizeInBits())/8);
 479     }
 480 }
 481
 482
 483 Texture* CubeMapBuilder::build(Effect* effect, const SGPropertyNode* props,
 484                                const SGReaderWriterXMLOptions* options)
 485 {
 486     // First check that there is a <images> tag
 487     const SGPropertyNode* texturesProp = getEffectPropertyChild(effect, props, "images");
 488     const SGPropertyNode* crossProp = getEffectPropertyChild(effect, props, "image");
 489     if (!texturesProp && !crossProp) {
 490         throw BuilderException("no images defined for cube map");
 491         return NULL; // This is redundant
 492     }
 493
 494     // Using 6 separate images
 495     if(texturesProp) {
 496
 497         SG_LOG(SG_INPUT, SG_DEBUG, "try 6 images ");
 498
 499         CubeMapTuple _tuple = makeCubeMapTuple(effect, texturesProp);
 500
 501         CubeMap::iterator itr = _cubemaps.find(_tuple);
 502         if (itr != _cubemaps.end())
 503             return itr->second.get();
 504
 505         TextureCubeMap* cubeTexture = new osg::TextureCubeMap;
 506
 507         // TODO: Read these from effect file? Maybe these are sane for all cuebmaps?
 508         cubeTexture->setFilter(osg::Texture3D::MIN_FILTER, osg::Texture::LINEAR_MIPMAP_LINEAR);
 509         cubeTexture->setFilter(osg::Texture3D::MAG_FILTER, osg::Texture::LINEAR);
 510         cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 511         cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 512         cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 513
 514         osgDB::ReaderWriter::ReadResult result =
 515             osgDB::Registry::instance()->readImage(_tuple.get<0>(), options);
 516         if(result.success()) {
 517             osg::Image* image = result.getImage();
 518             cubeTexture->setImage(TextureCubeMap::POSITIVE_X, image);
 519         }
 520         result = osgDB::Registry::instance()->readImage(_tuple.get<1>(), options);
 521         if(result.success()) {
 522             osg::Image* image = result.getImage();
 523             cubeTexture->setImage(TextureCubeMap::NEGATIVE_X, image);
 524         }
 525         result = osgDB::Registry::instance()->readImage(_tuple.get<2>(), options);
 526         if(result.success()) {
 527             osg::Image* image = result.getImage();
 528             cubeTexture->setImage(TextureCubeMap::POSITIVE_Y, image);
 529         }
 530         result = osgDB::Registry::instance()->readImage(_tuple.get<3>(), options);
 531         if(result.success()) {
 532             osg::Image* image = result.getImage();
 533             cubeTexture->setImage(TextureCubeMap::NEGATIVE_Y, image);
 534         }
 535         result = osgDB::Registry::instance()->readImage(_tuple.get<4>(), options);
 536         if(result.success()) {
 537             osg::Image* image = result.getImage();
 538             cubeTexture->setImage(TextureCubeMap::POSITIVE_Z, image);
 539         }
 540         result = osgDB::Registry::instance()->readImage(_tuple.get<5>(), options);
 541         if(result.success()) {
 542             osg::Image* image = result.getImage();
 543             cubeTexture->setImage(TextureCubeMap::NEGATIVE_Z, image);
 544         }
 545
 546         _cubemaps[_tuple] = cubeTexture;
 547
 548         return cubeTexture;
 549     }
 550
 551
 552     // Using 1 cross image
 553     else if(crossProp) {
 554         SG_LOG(SG_INPUT, SG_DEBUG, "try cross map ");
 555
 556         std::string texname = crossProp->getStringValue();
 557
 558         // Try to find existing cube map
 559         CrossCubeMap::iterator itr = _crossmaps.find(texname);
 560         if (itr != _crossmaps.end())
 561             return itr->second.get();
 562
 563         osgDB::ReaderWriter::ReadResult result =
 564             osgDB::Registry::instance()->readImage(texname, options);
 565         if(result.success()) {
 566             osg::Image* image = result.getImage();
 567             image->flipVertical();   // Seems like the image coordinates are somewhat funny, flip to get better ones
 568
 569             //cubeTexture->setResizeNonPowerOfTwoHint(false);
 570
 571             // Size of a single image, 4 rows and 3 columns
 572             int width = image->s() / 3;
 573             int height = image->t() / 4;
 574             int depth = image->r();
 575
 576             TextureCubeMap* cubeTexture = new osg::TextureCubeMap;
 577
 578             // Copy the 6 sub-images and push them
 579             for(int n=0; n<6; n++) {
 580
 581                 SG_LOG(SG_INPUT, SG_DEBUG, "Copying the " << n << "th sub-images and pushing it" );
 582
 583                 osg::ref_ptr<osg::Image> subimg = new osg::Image();
 584                 subimg->allocateImage(width, height, depth, image->getPixelFormat(), image->getDataType());  // Copy attributes
 585
 586                 // Choose correct image
 587                 switch(n) {
 588                 case 0:  // Front
 589                     copySubImage(image, width, 0, width, height, subimg.get(), 0, 0);
 590                     cubeTexture->setImage(TextureCubeMap::POSITIVE_Y, subimg.get());
 591                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 592                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 593                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 594                     break;
 595                 case 1:  // Left
 596                     copySubImage(image, 0, height, width, height, subimg.get(), 0, 0);
 597                     cubeTexture->setImage(TextureCubeMap::NEGATIVE_X, subimg.get());
 598                     cubeTexture->setWrap(osg::Texture2D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 599                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 600                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 601                     break;
 602                 case 2:  // Top
 603                     copySubImage(image, width, height, width, height, subimg.get(), 0, 0);
 604                     cubeTexture->setImage(TextureCubeMap::POSITIVE_Z, subimg.get());
 605                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 606                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 607                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 608                     break;
 609                 case 3:  // Right
 610                     copySubImage(image, width*2, height, width, height, subimg.get(), 0, 0);
 611                     cubeTexture->setImage(TextureCubeMap::POSITIVE_X, subimg.get());
 612                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 613                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 614                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 615                     break;
 616                 case 4:  // Back
 617                     copySubImage(image, width, height*2, width, height, subimg.get(), 0, 0);
 618                     cubeTexture->setImage(TextureCubeMap::NEGATIVE_Y, subimg.get());
 619                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 620                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 621                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 622                     break;
 623                 case 5:  // Bottom
 624                     copySubImage(image, width, height*3, width, height, subimg.get(), 0, 0);
 625                     cubeTexture->setImage(TextureCubeMap::NEGATIVE_Z, subimg.get());
 626                     cubeTexture->setWrap(osg::Texture3D::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
 627                     cubeTexture->setWrap(osg::Texture3D::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
 628                     cubeTexture->setWrap(osg::Texture3D::WRAP_R, osg::Texture::CLAMP_TO_EDGE);
 629                     break;
 630                 };
 631
 632             }
 633
 634             _crossmaps[texname] = cubeTexture;
 635
 636             return cubeTexture;
 637
 638         } else {
 639             throw BuilderException("Could not load cube cross");
 640         }
 641     }
 642
 643     return NULL;
 644 }
 645
 646 namespace {
 647 TextureBuilder::Registrar installCubeMap("cubemap", new CubeMapBuilder);
 648 }
 649
 650 EffectNameValue<TexEnvCombine::CombineParam> combineParamInit[] =
 651 {
 652     {"replace", TexEnvCombine::REPLACE},
 653     {"modulate", TexEnvCombine::MODULATE},
 654     {"add", TexEnvCombine::ADD},
 655     {"add-signed", TexEnvCombine::ADD_SIGNED},
 656     {"interpolate", TexEnvCombine::INTERPOLATE},
 657     {"subtract", TexEnvCombine::SUBTRACT},
 658     {"dot3-rgb", TexEnvCombine::DOT3_RGB},
 659     {"dot3-rgba", TexEnvCombine::DOT3_RGBA}
 660 };
 661
 662 EffectPropertyMap<TexEnvCombine::CombineParam> combineParams(combineParamInit);
 663
 664 EffectNameValue<TexEnvCombine::SourceParam> sourceParamInit[] =
 665 {
 666     {"constant", TexEnvCombine::CONSTANT},
 667     {"primary_color", TexEnvCombine::PRIMARY_COLOR},
 668     {"previous", TexEnvCombine::PREVIOUS},
 669     {"texture", TexEnvCombine::TEXTURE},
 670     {"texture0", TexEnvCombine::TEXTURE0},
 671     {"texture1", TexEnvCombine::TEXTURE1},
 672     {"texture2", TexEnvCombine::TEXTURE2},
 673     {"texture3", TexEnvCombine::TEXTURE3},
 674     {"texture4", TexEnvCombine::TEXTURE4},
 675     {"texture5", TexEnvCombine::TEXTURE5},
 676     {"texture6", TexEnvCombine::TEXTURE6},
 677     {"texture7", TexEnvCombine::TEXTURE7}
 678 };
 679
 680 EffectPropertyMap<TexEnvCombine::SourceParam> sourceParams(sourceParamInit);
 681
 682 EffectNameValue<TexEnvCombine::OperandParam> opParamInit[] =
 683 {
 684     {"src-color", TexEnvCombine::SRC_COLOR},
 685     {"one-minus-src-color", TexEnvCombine::ONE_MINUS_SRC_COLOR},
 686     {"src-alpha", TexEnvCombine::SRC_ALPHA},
 687     {"one-minus-src-alpha", TexEnvCombine::ONE_MINUS_SRC_ALPHA}
 688 };
 689
 690 EffectPropertyMap<TexEnvCombine::OperandParam> operandParams(opParamInit);
 691
 692 TexEnvCombine* buildTexEnvCombine(Effect* effect, const SGPropertyNode* envProp,
 693                                   const SGReaderWriterXMLOptions* options)
 694 {
 695     if (!isAttributeActive(effect, envProp))
 696         return 0;
 697     TexEnvCombine* result = new TexEnvCombine;
 698     const SGPropertyNode* p = 0;
 699     if ((p = getEffectPropertyChild(effect, envProp, "combine-rgb"))) {
 700         TexEnvCombine::CombineParam crgb = TexEnvCombine::MODULATE;
 701         findAttr(combineParams, p, crgb);
 702         result->setCombine_RGB(crgb);
 703     }
 704     if ((p = getEffectPropertyChild(effect, envProp, "combine-alpha"))) {
 705         TexEnvCombine::CombineParam calpha = TexEnvCombine::MODULATE;
 706         findAttr(combineParams, p, calpha);
 707         result->setCombine_Alpha(calpha);
 708     }
 709     if ((p = getEffectPropertyChild(effect, envProp, "source0-rgb"))) {
 710         TexEnvCombine::SourceParam source = TexEnvCombine::TEXTURE;
 711         findAttr(sourceParams, p, source);
 712         result->setSource0_RGB(source);
 713     }
 714     if ((p = getEffectPropertyChild(effect, envProp, "source1-rgb"))) {
 715         TexEnvCombine::SourceParam source = TexEnvCombine::PREVIOUS;
 716         findAttr(sourceParams, p, source);
 717         result->setSource1_RGB(source);
 718     }
 719     if ((p = getEffectPropertyChild(effect, envProp, "source2-rgb"))) {
 720         TexEnvCombine::SourceParam source = TexEnvCombine::CONSTANT;
 721         findAttr(sourceParams, p, source);
 722         result->setSource2_RGB(source);
 723     }
 724     if ((p = getEffectPropertyChild(effect, envProp, "source0-alpha"))) {
 725         TexEnvCombine::SourceParam source = TexEnvCombine::TEXTURE;
 726         findAttr(sourceParams, p, source);
 727         result->setSource0_Alpha(source);
 728     }
 729     if ((p = getEffectPropertyChild(effect, envProp, "source1-alpha"))) {
 730         TexEnvCombine::SourceParam source = TexEnvCombine::PREVIOUS;
 731         findAttr(sourceParams, p, source);
 732         result->setSource1_Alpha(source);
 733     }
 734     if ((p = getEffectPropertyChild(effect, envProp, "source2-alpha"))) {
 735         TexEnvCombine::SourceParam source = TexEnvCombine::CONSTANT;
 736         findAttr(sourceParams, p, source);
 737         result->setSource2_Alpha(source);
 738     }
 739     if ((p = getEffectPropertyChild(effect, envProp, "operand0-rgb"))) {
 740         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_COLOR;
 741         findAttr(operandParams, p, op);
 742         result->setOperand0_RGB(op);
 743     }
 744     if ((p = getEffectPropertyChild(effect, envProp, "operand1-rgb"))) {
 745         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_COLOR;
 746         findAttr(operandParams, p, op);
 747         result->setOperand1_RGB(op);
 748     }
 749     if ((p = getEffectPropertyChild(effect, envProp, "operand2-rgb"))) {
 750         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 751         findAttr(operandParams, p, op);
 752         result->setOperand2_RGB(op);
 753     }
 754     if ((p = getEffectPropertyChild(effect, envProp, "operand0-alpha"))) {
 755         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 756         findAttr(operandParams, p, op);
 757         result->setOperand0_Alpha(op);
 758     }
 759     if ((p = getEffectPropertyChild(effect, envProp, "operand1-alpha"))) {
 760         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 761         findAttr(operandParams, p, op);
 762         result->setOperand1_Alpha(op);
 763     }
 764     if ((p = getEffectPropertyChild(effect, envProp, "operand2-alpha"))) {
 765         TexEnvCombine::OperandParam op = TexEnvCombine::SRC_ALPHA;
 766         findAttr(operandParams, p, op);
 767         result->setOperand2_Alpha(op);
 768     }
 769     if ((p = getEffectPropertyChild(effect, envProp, "scale-rgb"))) {
 770         result->setScale_RGB(p->getValue<float>());
 771     }
 772     if ((p = getEffectPropertyChild(effect, envProp, "scale-alpha"))) {
 773         result->setScale_Alpha(p->getValue<float>());
 774     }
 775 #if 0
 776     if ((p = getEffectPropertyChild(effect, envProp, "constant-color"))) {
 777         SGVec4d color = p->getValue<SGVec4d>();
 778         result->setConstantColor(toOsg(color));
 779     } else if ((p = getEffectPropertyChild(effect, envProp,
 780                                            "light-direction"))) {
 781         SGVec3d direction = p->getValue<SGVec3d>();
 782         result->setConstantColorAsLightDirection(toOsg(direction));
 783     }
 784 #endif
 785     const SGPropertyNode* colorNode = envProp->getChild("constant-color");
 786     if (colorNode)
 787         initFromParameters(effect, colorNode, result,
 788                            &TexEnvCombine::setConstantColor, colorFields,
 789                            options);
 790     return result;
 791 }
 792
 793 EffectNameValue<TexGen::Mode> tgenModeInit[] =
 794 {
 795     { "object-linear", TexGen::OBJECT_LINEAR},
 796     { "eye-linear", TexGen::EYE_LINEAR},
 797     { "sphere-map", TexGen::SPHERE_MAP},
 798     { "normal-map", TexGen::NORMAL_MAP},
 799     { "reflection-map", TexGen::REFLECTION_MAP}
 800 };
 801
 802 EffectPropertyMap<TexGen::Mode> tgenModes(tgenModeInit);
 803
 804 EffectNameValue<TexGen::Coord> tgenCoordInit[] =
 805 {
 806     {"s", TexGen::S},
 807     {"t", TexGen::T},
 808     {"r", TexGen::R},
 809     {"q", TexGen::Q}
 810 };
 811
 812 EffectPropertyMap<TexGen::Coord> tgenCoords(tgenCoordInit);
 813
 814 TexGen* buildTexGen(Effect* effect, const SGPropertyNode* tgenProp)
 815 {
 816     if (!isAttributeActive(effect, tgenProp))
 817         return 0;
 818     TexGen* result = new TexGen;
 819     TexGen::Mode mode = TexGen::OBJECT_LINEAR;
 820     findAttr(tgenModes, getEffectPropertyChild(effect, tgenProp, "mode"), mode);
 821     result->setMode(mode);
 822     const SGPropertyNode* planesNode = tgenProp->getChild("planes");
 823     if (planesNode) {
 824         for (int i = 0; i < planesNode->nChildren(); ++i) {
 825             const SGPropertyNode* planeNode = planesNode->getChild(i);
 826             TexGen::Coord coord;
 827             findAttr(tgenCoords, planeNode->getName(), coord);
 828             const SGPropertyNode* realNode
 829                 = getEffectPropertyNode(effect, planeNode);
 830             SGVec4d plane = realNode->getValue<SGVec4d>();
 831             result->setPlane(coord, toOsg(plane));
 832         }
 833     }
 834     return result;
 835 }
 836
 837 bool makeTextureParameters(SGPropertyNode* paramRoot, const StateSet* ss)
 838 {
 839     SGPropertyNode* texUnit = makeChild(paramRoot, "texture");
 840     const Texture* tex = getStateAttribute<Texture>(0, ss);
 841     const Texture2D* texture = dynamic_cast<const Texture2D*>(tex);
 842     makeChild(texUnit, "unit")->setValue(0);
 843     if (!tex) {
 844         // The default shader-based technique ignores active
 845         makeChild(texUnit, "active")->setValue(false);
 846         return false;
 847     }
 848     const Image* image = texture->getImage();
 849     string imageName;
 850     if (image) {
 851         imageName = image->getFileName();
 852     } else {
 853         makeChild(texUnit, "active")->setValue(false);
 854         makeChild(texUnit, "type")->setValue("white");
 855         return false;
 856     }
 857     makeChild(texUnit, "active")->setValue(true);
 858     makeChild(texUnit, "type")->setValue("2d");
 859     string filter = findName(filterModes,
 860                              texture->getFilter(Texture::MIN_FILTER));
 861     string magFilter = findName(filterModes,
 862                              texture->getFilter(Texture::MAG_FILTER));
 863     string wrapS = findName(wrapModes, texture->getWrap(Texture::WRAP_S));
 864     string wrapT = findName(wrapModes, texture->getWrap(Texture::WRAP_T));
 865     string wrapR = findName(wrapModes, texture->getWrap(Texture::WRAP_R));
 866     makeChild(texUnit, "image")->setStringValue(imageName);
 867     makeChild(texUnit, "filter")->setStringValue(filter);
 868     makeChild(texUnit, "mag-filter")->setStringValue(magFilter);
 869     makeChild(texUnit, "wrap-s")->setStringValue(wrapS);
 870     makeChild(texUnit, "wrap-t")->setStringValue(wrapT);
 871     makeChild(texUnit, "wrap-r")->setStringValue(wrapR);
 872     return true;
 873 }
 874
 875 }