ogre笔记

最新推荐文章于 2022-01-04 01:14:12 发布

原创最新推荐文章于 2022-01-04 01:14:12 发布 · 959 阅读

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文章标签：

#image #string #performance #file #buffer

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1、判断模型资源是否存在

MeshManager::getSingletonPtr()->resourceExists("sphere.mesh")

2、手动加载纹理

TexturePtr tex = TextureManager::getSingleton().load(fInfo.filename, "General")

3、TexturePtr 转换 Image 方法

4、将大图片切分成若干小图片

void ProcessCardsTexture(Ogre::String sPrefix,int nRow, int nCol, Ogre::TexturePtr ptexSrc, Ogre::String sSaveDir)
{
	if (sSaveDir.empty())
		return;

int nWidth  = ptexSrc->getWidth() / nCol;
	int nHeight = ptexSrc->getHeight() / nRow;

Ogre::PixelFormat pf = ptexSrc->getFormat();
	Ogre::HardwarePixelBufferSharedPtr pixelBuffer = ptexSrc->getBuffer();

// Lock the pixel buffer and get a pixel box
	pixelBuffer->lock(Ogre::HardwareBuffer::HBL_NORMAL); // for best performance use HBL_DISCARD!
	const Ogre::PixelBox& pixelBox = pixelBuffer->getCurrentLock();
	//////////////////////////////////////////////////////////////////////////
	Ogre::TexturePtr ptexCard;
	char szTexture[32] = "/0";
	for (int i = 0; i < nRow; i++)
	{
		for (int j = 0; j < nCol; j++)
		{
			Ogre::uint8 *psrc = static_cast<Ogre::uint8*>(pixelBox.data);
			// move psrc point to current data.
			psrc += (nWidth  *4  *nCol)  *nHeight  *i + j  *nWidth  *4;
			
			sprintf(szTexture, "%s_%d_%d.png",sPrefix.data(), i + 1, j + 1);
			Ogre::String file = sSaveDir + szTexture;
			if (!QFile::exists(QString(file.data())))
			{
				ptexCard = Ogre::TextureManager::getSingleton().createManual(
					szTexture,    // name
					Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
					Ogre::TEX_TYPE_2D,  // type
					nWidth, nHeight,    // width & height
					0,					// number of mipmaps
					pf,					// pixel format
					Ogre::TU_DEFAULT);

Ogre::HardwarePixelBufferSharedPtr pixelBuf = ptexCard->getBuffer();
				pixelBuf->lock(Ogre::HardwareBuffer::HBL_NORMAL);
				const Ogre::PixelBox& pb = pixelBuf->getCurrentLock();
				Ogre::uint8 *pdesc = static_cast<Ogre::uint8*>(pb.data);

// Copy texture pixel data.
				for (int x = 0; x < nHeight; x++)
				{
					memcpy(pdesc, psrc, nWidth  *4);
					pdesc += nWidth  *4;
					psrc += nWidth  *4  *nCol;
				}
				pixelBuf->unlock();

Ogre::Image image;   
				image.loadDynamicImage((Ogre::uchar*)pb.data, pb.getWidth(), pb.getHeight(), pb.format);   
				image.save(file);
			}

}
	}

// Unlock the pixel buffer
	pixelBuffer->unlock();
}