source: downloads/ColladaPlugin/src/OgreColladaTexture.cpp @ 24

/**
 * This source file is part of OgreColladaPlugin
 * an addon for OGRE (Object-oriented Graphics Rendering Engine)
 * For the latest info, see http://www.ogre3d.org/
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.

 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

 * You should have received a copy of the GNU Lesser General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 * @author      Philipp Hartl
 * @see         README
 */

#include "OgreColladaTexture.h"
#include "OgreColladaDocument.h"
#include "OgreColladaLibrary.h"
#include "OgreColladaSyntax.h"
#include "OgreColladaUtils.h"

namespace Ogre
{
        //-------------------------------------------------------------------------
        ColladaImage::ColladaImage(ColladaDocument *d, xmlNode *n) : ColladaEntity(d, n) { }

        //-------------------------------------------------------------------------
        ColladaImage::~ColladaImage(void) { }

        //-------------------------------------------------------------------------
        bool ColladaImage::doImport(void)
        {
                if (mLoaded) return mStatus;
                else mLoaded = true;

                // get attributes of <image> tag
                // source is a must, watch out for reference url (local, extern)!
                mSource = ColladaUtils::getProperty(mNode, CS_ATR_IMAGE_SOURCE);
        
                String tmp = ColladaUtils::getProperty(mNode, CS_ATR_IMAGE_FORMAT);
                mFormat = (!tmp.empty()) ? tmp : "";
                
                tmp = ColladaUtils::getProperty(mNode, CS_ATR_IMAGE_HEIGHT);
        mHeight = (!tmp.empty()) ? static_cast<uint>(atoi(tmp.c_str())) : 0;

                tmp = ColladaUtils::getProperty(mNode, CS_ATR_IMAGE_WIDTH);
                mWidth = (!tmp.empty()) ? static_cast<uint>(atoi(tmp.c_str())) : 0;

                tmp = ColladaUtils::getProperty(mNode, CS_ATR_IMAGE_DEPTH);
                mDepth = (!tmp.empty()) ? static_cast<uint>(atoi(tmp.c_str())) : 1;

                mStatus = true;
                return mStatus;
        }

        //-------------------------------------------------------------------------
        // ColladaTexture
        //-------------------------------------------------------------------------

        //-------------------------------------------------------------------------
        ColladaTexture::ColladaTexture(ColladaDocument *d, xmlNode *n) : ColladaEntity(d, n) 
        { 
                mImage = NULL;
                mType  = ColladaTextureSpecific::UNKNOWN;
        }

        //-------------------------------------------------------------------------
        ColladaTexture::~ColladaTexture(void)
        {
                mImage = NULL;  // attention, the image instance will be deleted by the library container!
                mType  = ColladaTextureSpecific::UNKNOWN;
        }

        //-------------------------------------------------------------------------
        bool ColladaTexture::doImport(void)
        {
                if (mLoaded) return mStatus;
                else mLoaded = true;

                // <asset> child
                // xmlNode *asset = ColladaUtils::getChildByTagName(mNode, CS_ELM_ASSET);

                // <param> childs, describes the texture dataflow
                xmlNodePtrVector params = ColladaUtils::getChildsByTagName(mNode, CS_ELM_PARAM);
                xmlNode *param = NULL;
                if (!params.empty()) param = params.at(0);
                // get the texture type
                String texturetype = ColladaUtils::getProperty(param, CS_ATR_NAME);
                mType  = ColladaTextureSpecific::getType(texturetype);
                if (mType == ColladaTextureSpecific::UNKNOWN)
                {
                        LogManager::getSingleton().logMessage("ColladaTexture::doImport - <param name=" + texturetype + "> unknown! " + mId);
                        return false;
                }

                // <technique> nodes
                xmlNodePtrVector techniques = ColladaUtils::getChildsByTagName(mNode, CS_ELM_TECHNIQUE);
                // currently we are only interested in "COMMON" profile
                xmlNode *technique = NULL;
                for (xmlNodePtrVector::iterator it = techniques.begin(); it != techniques.end(); ++it)
                {
                        String profile = ColladaUtils::getProperty(*it, CS_ATR_PROFILE);
                        if (profile == CS_VAL_TECHNIQUE_PROFILE_COMMON)
                        {
                                technique = *it;
                                break;
                        }
                }
                if (technique == NULL) return false;
        
                // the <input> child, there are more than one possible, but only one makes sense
                xmlNode *input = ColladaUtils::getChildByTagName(technique, CS_ELM_INPUT);
                // the semantic property should be "IMAGE"
                String semantic = ColladaUtils::getProperty(input, CS_ATR_INPUT_SEMANTIC);
                if (semantic != CS_VAL_INPUT_SEMANTIC_IMAGE)
                {
                        LogManager::getSingleton().logMessage("ColladaTexture::doImport - <input semantic=" + semantic + "> unknown");
                        return false;
                }

                // the source url
                String source = ColladaUtils::getProperty(input, CS_ATR_INPUT_SOURCE);
                if (source.empty())
                {
                        LogManager::getSingleton().logMessage("ColladaTexture::doImport - no source url for texture is given! " + mId);
                        return false;
                }

                // local reference of image file
                if (source.find("#") == 0)
                {
                        source.erase(0,1);

                        // try to find the instance and load it, if it is not already loaded
                        mImage = mDoc->getLibrary()->getImage(source);
                        if (mImage == NULL)
                        {
                                LogManager::getSingleton().logMessage("ColladaTexture::doImport - can't find the image reference " + source + "! " + mId);
                                return false;
                        }
                        // try to import the entity
                        if (!mImage->doImport())
                        {
                                LogManager::getSingleton().logMessage("ColladaTexture::doImport - loading of image " + source + " failed! " + mId);
                                return false;
                        }
                }
                // external
                else
                {
                        LogManager::getSingleton().logMessage("ColladaTexture::doImport - external refernces are currently not implemented! " + mId);   
                        return false;
                }

                mStatus = true;
                return mStatus;
        }

        //-------------------------------------------------------------------------
        namespace ColladaTextureSpecific
        {
                Type getType(const String &s)
                {
                        if (s == CS_VAL_TEXTURE_PARAM_AMBIENT) return AMBIENT;
                        else if (s == CS_VAL_TEXTURE_PARAM_DIFFUSE) return DIFFUSE;
                        else if (s == CS_VAL_TEXTURE_PARAM_EMISSION) return EMISSION;
                        else if (s == CS_VAL_TEXTURE_PARAM_SHININESS) return SHININESS;
                        else if (s == CS_VAL_TEXTURE_PARAM_SPECULAR) return SPECULAR;
                        else return UNKNOWN;
                };
        }
}