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