C++ Image::getWidth方法代码示例

//----------------------------------------------------------------------------//
Texture* OgreImageCodec::load(const RawDataContainer& data, Texture* result)
{
    using namespace Ogre;

    // wrap the buffer of the RawDataContainer with an Ogre::MemoryDataStream.
    DataStreamPtr stream(
        new MemoryDataStream(
            const_cast<void*>(static_cast<const void*>(data.getDataPtr())),
            data.getSize(), false));

    // load the image
    Ogre::Image image;
    image.load(stream);

    // discover the pixel format and number of pixel components
    Texture::PixelFormat format;
    int components;
    switch (image.getFormat())
    {
        case PF_R8G8B8:
            format = Texture::PF_RGB;
            components = 3;
            break;

        case PF_A8R8G8B8:
            format = Texture::PF_RGBA;
            components = 4;
            break;

        default:
            throw FileIOException("OgreImageCodec::load: File data was of an "
                                  "unsupported format.");
            break;
    }

    // do the old switcharoo on R and B...
    // (we could 'fix' this in the CEGUI::OgreTexture, but that would break all
    // the other ImageCodecs when used with the Ogre renderer, hence we don't)
    uchar* dat = image.getData();
    for (uint j = 0; j < image.getHeight(); ++j)
    {
        for (uint i = 0; i < image.getWidth(); ++i)
        {
            uchar tmp = dat[i * components + 0];
            dat[i * components + 0] = dat[i * components + 2];
            dat[i * components + 2] = tmp;
        }

        dat += image.getRowSpan();
    }

    // load the resulting image into the texture
    result->loadFromMemory(image.getData(),
                           Size(image.getWidth(),
                                image.getHeight()),
                           format);

    return result;
}

//-----------------------------------------------------------------------------------------
void CTerrainGroupEditor::importFullTerrainFromHeightMap()
{
    UTFStringVector extlist;
    extlist.push_back(OTR("PNG Grayscale"));
    extlist.push_back("*.png");
    extlist.push_back(OTR("Raw 32bit Float File"));
    extlist.push_back("*.raw;*.ohm;*.f32;*.r32");

    Ogre::UTFString defaultPath = mSystem->GetSetting("system", "ExportTerrainPath", "");

    Ogre::String filename = mSystem->DisplayOpenDialog(OTR("Import Heightmap"), extlist, defaultPath);
    if(filename == "") 
        return;

    mSystem->SetSetting("system", "ExportTerrainPath", OgitorsUtils::ExtractFilePath(filename));

    Ogre::NameValuePairList params;
    if(!mSystem->DisplayImportHeightMapDialog(params))
        return;
    
    Ogre::Real fScale = Ogre::StringConverter::parseReal(params["scale"]);
    Ogre::Real fBias = Ogre::StringConverter::parseReal(params["bias"]);
    Ogre::String normal = params["normal"];
    Ogre::String diffuse = params["diffuse"];
    bool flipV = Ogre::StringConverter::parseBool(params["inverted"]);

    float *data = 0;
    float *flipBV = 0;

    Ogre::String namePart = OgitorsUtils::ExtractFileName(filename);
    namePart.erase(0, namePart.find("."));

    int imgW = 0;
    int imgH = 0;

    if(namePart == ".png")
    {
        std::fstream fstr(filename.c_str(), std::ios::in|std::ios::binary);
        Ogre::DataStreamPtr stream = Ogre::DataStreamPtr(OGRE_NEW Ogre::FileStreamDataStream(&fstr, false));

        Ogre::Image img;
        img.load(stream);

        data = OGRE_ALLOC_T(float, img.getWidth() * img.getHeight(), Ogre::MEMCATEGORY_GEOMETRY);
        Ogre::PixelBox pb(img.getWidth(), img.getHeight(), 1, Ogre::PF_FLOAT32_R, data);
        Ogre::PixelUtil::bulkPixelConversion(img.getPixelBox(), pb);

        imgW = img.getWidth();
        imgH = img.getHeight();
        
        img.freeMemory();
        stream.setNull();
    }

	void SnowTerrain::initBlendMaps(Terrain* terrain)
	{
		TextureLayerFileList blendImages = mSnowConfig->terrainSettings.textureBlendFileList;

		// load those blendmaps into the layers
		for(int j = 0;j < terrain->getLayerCount();j++)
		{
			// skip first layer
			if(j==0)
				continue;

			// no blend map for this layer
			if(blendImages.size() >= j && blendImages[j].length() == 0)
				continue;

			Ogre::TerrainLayerBlendMap *blendmap = terrain->getLayerBlendMap(j);
			Ogre::Image img;

			img.load(blendImages[j],"General");
			int blendmapsize = terrain->getLayerBlendMapSize();
			if(img.getWidth() != blendmapsize)
				img.resize(blendmapsize, blendmapsize);

			float *ptr = blendmap->getBlendPointer();
			Ogre::uint8 *data = static_cast<Ogre::uint8*>(img.getPixelBox().data);

			for(int bp = 0;bp < blendmapsize * blendmapsize;bp++)
				ptr[bp] = static_cast<float>(data[bp]) / 255.0f;

			blendmap->dirty();
			blendmap->update();
		}
	}

void gkTextureLoader::loadResource(Ogre::Resource* resource)
{
	Ogre::Texture* texture = static_cast<Ogre::Texture*>(resource);

	if (!m_stream)
	{
		gkPrintf("Warning: Skipping image %s no packed file information is present!", texture->getName().c_str());
		return;
	}

	Ogre::DataStreamPtr stream(OGRE_NEW Ogre::MemoryDataStream(m_stream->ptr(), m_stream->size()));

	Ogre::Image ima;
	ima.load(stream);

	texture->setUsage(Ogre::TU_DEFAULT);
	texture->setTextureType(Ogre::TEX_TYPE_2D);
	texture->setNumMipmaps(gkEngine::getSingleton().getUserDefs().defaultMipMap);
	texture->setWidth(ima.getWidth());
	texture->setHeight(ima.getHeight());
	texture->setDepth(ima.getDepth());
	texture->setFormat(ima.getFormat());

	Ogre::ConstImagePtrList ptrs;
	ptrs.push_back(&ima);
	texture->_loadImages(ptrs);
}

void AppDemarrage::createTerrain()
{
    // options globales
    mTerrainOptions = OGRE_NEW Ogre::TerrainGlobalOptions();
    mTerrainOptions->setMaxPixelError(8);
    mTerrainOptions->setLightMapDirection(mLight->getDerivedDirection());
    mTerrainOptions->setCompositeMapDistance(3000);
    mTerrainOptions->setCompositeMapAmbient(mSceneMgr->getAmbientLight());
    mTerrainOptions->setCompositeMapDiffuse(mLight->getDiffuseColour());

    mTerrain = OGRE_NEW Ogre::Terrain(mSceneMgr);

    Ogre::Image img;
    img.load("terrain.png", Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);

    // informations géométriques
    Ogre::Terrain::ImportData imp;
    imp.inputImage = &img;
    imp.terrainSize = img.getWidth();
    imp.worldSize = 8000;
    imp.inputScale = 600;
    imp.minBatchSize = 33;
    imp.maxBatchSize = 65;

    // textures
    imp.layerList.resize(3);
    imp.layerList[0].worldSize = 100;
    imp.layerList[0].textureNames.push_back("grass_green-01_diffusespecular.dds");
    imp.layerList[0].textureNames.push_back("grass_green-01_normalheight.dds");
    imp.layerList[1].worldSize = 30;
    imp.layerList[1].textureNames.push_back("growth_weirdfungus-03_diffusespecular.dds");
    imp.layerList[1].textureNames.push_back("growth_weirdfungus-03_normalheight.dds");
    imp.layerList[2].worldSize = 200;
    imp.layerList[2].textureNames.push_back("dirt_grayrocky_diffusespecular.dds");
    imp.layerList[2].textureNames.push_back("dirt_grayrocky_normalheight.dds");
    mTerrain->prepare(imp);
    mTerrain->load();

    // plaquage de texture
    Ogre::TerrainLayerBlendMap* blendMap1 = mTerrain->getLayerBlendMap(1);
    float* pBlend1 = blendMap1->getBlendPointer();

    for (Ogre::uint16 y = 0; y < mTerrain->getLayerBlendMapSize(); ++y)
    {
        for (Ogre::uint16 x = 0; x < mTerrain->getLayerBlendMapSize(); ++x)
        {
            *pBlend1++ = 150;
        }
    }

    blendMap1->dirty();
    blendMap1->update();

    mTerrain->freeTemporaryResources();
}

	void MouseCursor::_setSkinType(const Ogre::String type)
	{
		if(mSkinType == type)
			return;

		mSkinType = type;
		
		Ogre::Image i;
		i.load(mSkinTypeManager->getSkinType("MouseCursor",mSkinType)->getSkinElement(TEXTURE)->getTextureName(),Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
		// update cursor size to match texture used
		setSize(i.getWidth(),i.getHeight());
	}

//-----------------------------------------------------------------------------------------
QPixmap GenericImageEditorCodec::onBeforeDisplay(Ogre::DataStreamPtr stream)
{
    Ogre::Image image;
    image.load(stream);

    ImageConverter imageConverter(image.getWidth(), image.getHeight());

    if (mPixmap.convertFromImage(imageConverter.fromOgreImage(image)))
        return mPixmap;

    mPixmap = 0;
    return mPixmap;
}

//-----------------------------------------------------------------------
void AtlasImageTool::correctAlpha (Ogre::Image& image, Ogre::Real alphaCorrection)
{
	size_t numPixels = image.getWidth() * image.getHeight();
	size_t pointer = 0;
	for (size_t i = 0; i < numPixels; ++i)
	{
		Ogre::ColourValue colour;
		Ogre::PixelUtil::unpackColour(&colour, image.getFormat(), (image.getData() + pointer));
		colour.a *= alphaCorrection;
		Ogre::PixelUtil::packColour(colour, image.getFormat(), (image.getData() + pointer));
		pointer += Ogre::PixelUtil::getNumElemBytes(image.getFormat());
	}
}

	void MouseCursor::setSkinType(const Ogre::String type)
	{
		mSkinType = type;
		mDefaultSkinType = type;

		Ogre::Image i;
		i.load(mSkinTypeManager->getSkinType("MouseCursor",mSkinType)->getSkinElement(TEXTURE)->getTextureName(),Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
		// update cursor size to match texture used
		setSize(i.getWidth(),i.getHeight());

		Sheet* sheet = mMouseCursorDesc.guiManager->getActiveSheet();
		if(sheet != NULL)
		{
			MouseEventArgs args(sheet);
			args.position = getPosition();
			sheet->fireSheetEvent(SHEET_EVENT_MOUSE_CURSOR_SKIN_CHANGED,args);
		}
	}

	MouseCursor::MouseCursor(const MouseCursorDesc& d) :
		mSkinType("default"),
		mDefaultSkinType("default")
	{
		mMouseCursorDesc.guiManager = d.guiManager;
		mSkinTypeManager = SkinTypeManager::getSingletonPtr();

		for(int i = 0; i < 4; ++i)
			mEnteredBorders[i] = false;

		// Update Size of Cursor to match Skin Texture
		Ogre::Image i;
		i.load(mSkinTypeManager->getSkinType("MouseCursor",mSkinType)->getSkinElement(TEXTURE)->getTextureName(),Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
		// update cursor size to match texture used
		setSize(i.getWidth(),i.getHeight());

		// Set default position
		setPosition(0,0);
	}

//-----------------------------------------------------------------------
void AtlasImageTool::interpolate (Ogre::Image& interpolatedImage, 
								  Ogre::Image& firstImage, 
								  Ogre::Image& nextImage, 
								  Ogre::Real fraction)
{
	size_t numPixels = interpolatedImage.getWidth() * interpolatedImage.getHeight();
	size_t pointer = 0;
	for (size_t i = 0; i < numPixels; ++i)
	{
		Ogre::ColourValue firstColour;
		Ogre::ColourValue nextColour;
		Ogre::ColourValue interpolatedColour;
		Ogre::PixelUtil::unpackColour(&firstColour, firstImage.getFormat(), (firstImage.getData() + pointer));
		Ogre::PixelUtil::unpackColour(&nextColour, nextImage.getFormat(), (nextImage.getData() + pointer));
		interpolatedColour = firstColour + fraction * (nextColour - firstColour);
		Ogre::PixelUtil::packColour(interpolatedColour, interpolatedImage.getFormat(), (interpolatedImage.getData() + pointer));
		pointer += Ogre::PixelUtil::getNumElemBytes(interpolatedImage.getFormat());
	}
}

void DotSceneLoader::processBlendmaps(rapidxml::xml_node<>* XMLNode)
{
    int pageX = Ogre::StringConverter::parseInt(XMLNode->first_attribute("pageX")->value());
    int pageY = Ogre::StringConverter::parseInt(XMLNode->first_attribute("pageY")->value());

    Ogre::String filename = mTerrainGroup->generateFilename(pageX, pageY);
    // skip this is terrain page has been saved already
    if (!Ogre::ResourceGroupManager::getSingleton().resourceExists(mTerrainGroup->getResourceGroup(), filename))
    {
        rapidxml::xml_node<>* pElement;

        // Process blendmaps (*)
        std::vector<Ogre::String> blendMaps;
        rapidxml::xml_node<>* pBlendmap;
        pElement = XMLNode->first_node("blendMaps");
        pBlendmap = pElement->first_node("blendMap");
        while(pBlendmap)
        {
            blendMaps.push_back(getAttrib(pBlendmap, "texture",""));
            pBlendmap = pBlendmap->next_sibling("blendMap");
        }

        for(int j = 1;j < mTerrainGroup->getTerrain(pageX, pageY)->getLayerCount();j++)
        {
            Ogre::TerrainLayerBlendMap *blendmap = mTerrainGroup->getTerrain(pageX, pageY)->getLayerBlendMap(j);
            Ogre::Image img;
            img.load(blendMaps[j-1],"General");
            int blendmapsize = mTerrainGroup->getTerrain(pageX, pageY)->getLayerBlendMapSize();
            if(img.getWidth() != blendmapsize)
                img.resize(blendmapsize, blendmapsize);

            float *ptr = blendmap->getBlendPointer();
            Ogre::uint8 *data = static_cast<Ogre::uint8*>(img.getPixelBox().data);

            for(int bp = 0;bp < blendmapsize * blendmapsize;bp++)
                ptr[bp] = static_cast<float>(data[bp]) / 255.0f;

            blendmap->dirty();
            blendmap->update();
        }
    }
}

    void GlobalMap::exploreCell(int cellX, int cellY)
    {
        float originX = static_cast<float>((cellX - mMinX) * mCellSize);
        // NB y + 1, because we want the top left corner, not bottom left where the origin of the cell is
        float originY = static_cast<float>(mHeight - (cellY + 1 - mMinY) * mCellSize);

        if (cellX > mMaxX || cellX < mMinX || cellY > mMaxY || cellY < mMinY)
            return;

        Ogre::TexturePtr localMapTexture = Ogre::TextureManager::getSingleton().getByName("Cell_"
            + boost::lexical_cast<std::string>(cellX) + "_" + boost::lexical_cast<std::string>(cellY));

        if (!localMapTexture.isNull())
        {
            int mapWidth = localMapTexture->getWidth();
            int mapHeight = localMapTexture->getHeight();
            mOverlayTexture->load();
            mOverlayTexture->getBuffer()->blit(localMapTexture->getBuffer(), Ogre::Image::Box(0,0,mapWidth,mapHeight),
                         Ogre::Image::Box(static_cast<Ogre::uint32>(originX), static_cast<Ogre::uint32>(originY),
                         static_cast<Ogre::uint32>(originX + mCellSize), static_cast<Ogre::uint32>(originY + mCellSize)));

            Ogre::Image backup;
            std::vector<Ogre::uchar> data;
            data.resize(mCellSize*mCellSize*4, 0);
            backup.loadDynamicImage(&data[0], mCellSize, mCellSize, Ogre::PF_A8B8G8R8);

            localMapTexture->getBuffer()->blitToMemory(Ogre::Image::Box(0,0,mapWidth,mapHeight), backup.getPixelBox());

            for (int x=0; x<mCellSize; ++x)
                for (int y=0; y<mCellSize; ++y)
                {
                    assert (originX+x < mOverlayImage.getWidth());
                    assert (originY+y < mOverlayImage.getHeight());
                    assert (x < int(backup.getWidth()));
                    assert (y < int(backup.getHeight()));
                    mOverlayImage.setColourAt(backup.getColourAt(x, y, 0), static_cast<size_t>(originX + x), static_cast<size_t>(originY + y), 0);
                }
        }
    }

	//------------------------------------------------------
	void TextureAtlas::build() {
		if (!mIsDirty)
			return;

		bool fitted;

		size_t area = 0;

		// build the fonts (if this didn't happen already)
		// so we'll be sure the glyphs are there to be atlassed
		FontSet::iterator fit = mMyFonts.begin();

		while (fit != mMyFonts.end()) {
			FontDrawSource* fdsp = *fit++;

			if (!fdsp->isBuilt())
				fdsp->build();
		}

		// First, we sort by size of the DrawSource
		mMyDrawSources.sort(DrawSourceLess());

		// now try to allocate all the draw sources. If we fail, grow and try again
		do {
			fitted = true;
			area = 0;

			// try to fit
			DrawSourceList::iterator it = mMyDrawSources.begin();

			while (it != mMyDrawSources.end()) {
				
				const DrawSourcePtr& ds = *it++;

				const PixelSize& ps = ds->getPixelSize();
				area += ps.getPixelArea();
				
				LOG_VERBOSE("TextureAtlas: (%s) Trying to place %d x %d (%d -> %d)", mAtlasName.c_str(), ps.width, ps.height, ps.getPixelArea(), area);

				// try to allocate
				FreeSpaceInfo* fsi = mAtlasAllocation->allocate(ps.width, ps.height);

				if (fsi) {
					ds->setPlacementPtr(fsi);
				} else {
					fitted = false;
					break;
				}
			}
			// fitted?

			if (!fitted) // nope - Enlarge!
				enlarge(area);
		} while (!fitted);
		
		LOG_INFO("TextureAtlas: (%s) Creating atlas with dimensions %d x %d", mAtlasName.c_str(), mAtlasSize.width, mAtlasSize.height);

		if (mTexture.isNull())
			prepareResources();
		// TODO: Reallocate the texture here if needed!
		
		Ogre::HardwarePixelBufferSharedPtr pixelBuffer = mTexture->getBuffer();
		pixelBuffer->lock(Ogre::HardwareBuffer::HBL_DISCARD);
		
		const Ogre::PixelBox& targetBox = pixelBuffer->getCurrentLock();
		
		size_t pixelsize = Ogre::PixelUtil::getNumElemBytes(targetBox.format);
		size_t rowsize = targetBox.rowPitch * pixelsize;

		Ogre::uint8* dstData = static_cast<Ogre::uint8*>(targetBox.data);

		// We'll iterate over all draw sources, painting the pixels onto the allocated space
		DrawSourceList::iterator it = mMyDrawSources.begin();

		while (it != mMyDrawSources.end()) {
			const DrawSourcePtr& ds = *it++;

			// render all pixels into the right place
			FreeSpaceInfo* fsi = reinterpret_cast<FreeSpaceInfo*>(ds->getPlacementPtr());
			
			assert(fsi);

			// render into the specified place
			unsigned char* conversionBuf = NULL;
			

			const PixelSize& dps = ds->getPixelSize();
			Ogre::Image* img = ds->getImage();
			Ogre::PixelBox srcPixels = img->getPixelBox();
			
			// convert if the source data don't match
			if(img->getFormat() != Ogre::PF_BYTE_BGRA) {
					conversionBuf = new unsigned char[img->getWidth() * img->getHeight() * pixelsize];
					Ogre::PixelBox convPixels(Ogre::Box(0, 0, dps.width, dps.height), Ogre::PF_BYTE_BGRA, conversionBuf);
					Ogre::PixelUtil::bulkPixelConversion(srcPixels, convPixels);
					srcPixels = convPixels;
			}

			size_t srcrowsize = srcPixels.rowPitch * pixelsize;
//.........这里部分代码省略.........

void TerrainGeometryManager::initBlendMaps(int x, int z, Ogre::Terrain* terrain )
{
	bool debugBlendMaps = BOPT("DebugBlendMaps", false);

	int layerCount = terrain->getLayerCount();
	for (int i = 1; i < layerCount; i++)
	{
		blendLayerInfo_t &bi = blendInfo[i];

		if(bi.blendMapTextureFilename.empty()) continue;

		Ogre::Image img;
		//std::pair<uint8,uint8> textureIndex = terrain->getLayerBlendTextureIndex(i);
		//uint8 bti = terrain->getBlendTextureIndex(i);
		try
		{
			img.load(bi.blendMapTextureFilename, ResourceGroupManager::AUTODETECT_RESOURCE_GROUP_NAME);
		} catch(Exception &e)
		{
			LOG("Error loading blendmap: " + bi.blendMapTextureFilename + " : " + e.getFullDescription());
			continue;
		}

		TerrainLayerBlendMap *blendmap = terrain->getLayerBlendMap(i);

		// resize that blending map so it will fit
		Ogre::uint32 blendmapSize = terrain->getLayerBlendMapSize();
		if (img.getWidth() != blendmapSize)
			img.resize(blendmapSize, blendmapSize);

		// now to the ugly part
		float* ptr = blendmap->getBlendPointer();
		for (Ogre::uint32 z = 0; z != blendmapSize; z++)
		{
			for (Ogre::uint32 x = 0; x != blendmapSize; x++)
			{
				Ogre::ColourValue c = img.getColourAt(x, z, 0);
				float alpha = bi.alpha;
				if      (bi.blendMode == 'R')
					*ptr++ = c.r * alpha;
				else if (bi.blendMode == 'G')
					*ptr++ = c.g * alpha;
				else if (bi.blendMode == 'B')
					*ptr++ = c.b * alpha;
				else if (bi.blendMode == 'A')
					*ptr++ = c.a * alpha;
			}
		}
		blendmap->dirty();
		blendmap->update();
	}

	if (debugBlendMaps)
	{
		for (int i = 1; i < layerCount; i++)
		{
			Ogre::TerrainLayerBlendMap* blendMap = terrain->getLayerBlendMap(i);
			Ogre::uint32 blendmapSize = terrain->getLayerBlendMapSize();
			Ogre::Image img;
			unsigned short *idata = OGRE_ALLOC_T(unsigned short, blendmapSize * blendmapSize, Ogre::MEMCATEGORY_RESOURCE);
			float scale = 65535.0f;
			for (unsigned int x = 0; x < blendmapSize; x++)
				for (unsigned int z = 0; z < blendmapSize; z++)
					idata[x + z * blendmapSize] = (unsigned short)(blendMap->getBlendValue(x, blendmapSize - z) * scale);
			img.loadDynamicImage((Ogre::uchar*)(idata), blendmapSize, blendmapSize, Ogre::PF_L16);
			std::string fileName = "blendmap_layer_" + Ogre::StringConverter::toString(i) + ".png";
			img.save(fileName);
			OGRE_FREE(idata, Ogre::MEMCATEGORY_RESOURCE);
		}
	}
}