osg::SGIImageFileType Class Reference
[Image]

SGI File Handler. Used to read/write SGI files. See Image for a detailed description. More...

#include <OSGSGIImageFileType.h>

Inheritance diagram for osg::SGIImageFileType:

List of all members.

Safe Store/Restore
UInt64	store (const ImagePtr &image, UChar8 *buffer, Int32 memSize=-1)
virtual UInt64	maxBufferSize (const ImagePtr &image)
static UInt64	restore (ImagePtr &image, const UChar8 *buffer, Int32 memSize=-1)
static UInt64	store (const ImagePtr &image, const char *mimeType, UChar8 *buffer, Int32 memSize=-1)
Public Types
Flags
enum	{ OSG_READ_SUPPORTED = 1, OSG_WRITE_SUPPORTED = 2 }
Public Member Functions
Destructor
virtual	~SGIImageFileType (void)
Read/Write
virtual bool	validateHeader (const Char8 *fileName, bool &implemented)
virtual bool	read (ImagePtr &image, std::istream &is, const std::string &mimetype)
virtual std::string	determineMimetypeFromStream (std::istream &is)
Set
void	setOptions (const Char8 *options)
Get Methods
const Char8 *	getMimeType (void) const
const std::list< IDString > &	getSuffixList (void) const
virtual UInt32	getFlags (void) const
const Char8 *	getOptions (void)
Read/Write
virtual bool	read (ImagePtr &image, const Char8 *fileName)
virtual bool	write (const ImagePtr &image, const Char8 *fileName)
virtual bool	write (const ImagePtr &image, std::ostream &os, const std::string &mimetype)
Raw Store/Restore
virtual UInt64	restoreData (ImagePtr &image, const UChar8 *buffer, Int32 memSize=-1)
virtual UInt64	storeData (const ImagePtr &image, UChar8 *buffer, Int32 memSize=-1)
dump
void	dump (void)
Static Public Member Functions
Get Method
static SGIImageFileType &	the (void)
Protected Member Functions
Default Constructor
	SGIImageFileType (const Char8 *mimeType, const Char8 *suffixArray[], UInt16 suffixByteCount)
Protected Attributes
MTD Header
std::string	_options
Private Types
typedef ImageFileType	Inherited
Private Member Functions
Copy Constructor
	SGIImageFileType (const SGIImageFileType &obj)
Copy Operator
const SGIImageFileType &	operator= (const SGIImageFileType &obj)
Static Private Attributes
static SGIImageFileType	_the

---

Detailed Description

Image File Type to read/write and store/restore Image objects as SGI data.

All the type specific code is included in the class. Does not depend on external libs.

Definition at line 56 of file OSGSGIImageFileType.h.

---

Member Typedef Documentation

typedef ImageFileType osg::SGIImageFileType::Inherited [private]

Definition at line 117 of file OSGSGIImageFileType.h.

---

Member Enumeration Documentation

anonymous enum [inherited]

Enumerator:

OSG_READ_SUPPORTED
OSG_WRITE_SUPPORTED

Definition at line 66 of file OSGImageFileType.h.

    {
        OSG_READ_SUPPORTED = 1,
        OSG_WRITE_SUPPORTED = 2
    };

---

Constructor & Destructor Documentation

SGIImageFileType::~SGIImageFileType

(

void

)

[virtual]

Destructor

Definition at line 384 of file OSGSGIImageFileType.cpp.

{}

SGIImageFileType::SGIImageFileType	(	const Char8 *	mimeType,
		const Char8 *	suffixArray[],
		UInt16	suffixByteCount
	)			[protected]

Constructor used for the singleton object

Definition at line 374 of file OSGSGIImageFileType.cpp.

    : ImageFileType ( mimeType, suffixArray, suffixByteCount )
{}

osg::SGIImageFileType::SGIImageFileType

(

const SGIImageFileType &

obj

)

[private]

---

Member Function Documentation

SGIImageFileType & SGIImageFileType::the

(

void

)

[static]

Class method to get the singleton Object

Definition at line 289 of file OSGSGIImageFileType.cpp.

References _the.

{
    return _the;
}

bool SGIImageFileType::validateHeader	(	const Char8 *	fileName,
		bool &	implemented
	)			[virtual]

Reimplemented from osg::ImageFileType.

Definition at line 343 of file OSGSGIImageFileType.cpp.

{
    implemented = true;

    if(fileName == NULL)
        return false;

    FILE *file = fopen(fileName, "rb");
    if(file == NULL)
        return false;

    UInt16 magic = 0;
    fread((void *) &magic, sizeof(magic), 1, file);
    fclose(file);

#if BYTE_ORDER == LITTLE_ENDIAN
    if(magic == 0xda01) // the magic header is big endian need to swap it.
#else
    if(magic == 0x01da)
#endif
    {
        return true;
    }

    return false;
}

bool SGIImageFileType::read	(	ImagePtr &	image,
		std::istream &	is,
		const std::string &	mimetype
	)			[virtual]

Tries to fill the image object with the data read from the given input stream. Returns true on success.

Reimplemented from osg::ImageFileType.

Definition at line 303 of file OSGSGIImageFileType.cpp.

References ImageGetRow(), ImageOpen(), ImageRec::xsize, ImageRec::ysize, ImageRec::zsize, and zsize2pixelformat.

{
    ImageRec img;
    if (ImageOpen(img, is) == false)
        return false;

    if ((img.zsize < 1) || (img.zsize > 4))
        return false;

    image->set(zsize2pixelformat[img.zsize - 1], img.xsize, img.ysize);
    unsigned char *lptr = image->getData();
    unsigned int lineStride = img.xsize * img.zsize;
    for (int y = 0; y < img.ysize; ++y)
    {
        for (int z = 0; z < img.zsize; ++z)
            if (ImageGetRow(img, lptr + z, y, z, img.zsize) == false)
                return false;
        lptr += lineStride;
    }

    return true;
}

std::string SGIImageFileType::determineMimetypeFromStream

(

std::istream &

is

)

[virtual]

Tries to determine the mime type of the data provided by an input stream by searching for magic bytes. Returns the mime type or an empty string when the function could not determine the mime type.

Reimplemented from osg::ImageFileType.

Definition at line 332 of file OSGSGIImageFileType.cpp.

References osg::ImageFileType::getMimeType().

{
    char filecode[2];
    is.read(filecode, 2);
    is.seekg(-2, std::ios::cur);
    return strncmp(filecode, "\x01\xda", 2) == 0 ?
        std::string(getMimeType()) : std::string();
}

const SGIImageFileType& osg::SGIImageFileType::operator=

(

const SGIImageFileType &

obj

)

[private]

void ImageFileType::setOptions

(

const Char8 *

options

)

[inherited]

Definition at line 243 of file OSGImageFileType.cpp.

References osg::ImageFileType::_options.

Referenced by osg::ImageFileHandler::setOptions().

{
    _options = options;
}

const Char8 * ImageFileType::getMimeType

(

void

)

const [inherited]

Get method for the mime type

Definition at line 107 of file OSGImageFileType.cpp.

References osg::ImageFileType::_mimeType, and osg::IDString::str().

Referenced by osg::ImageFileHandler::addImageFileType(), osg::TIFImageFileType::determineMimetypeFromStream(), determineMimetypeFromStream(), osg::PSDImageFileType::determineMimetypeFromStream(), osg::PNMImageFileType::determineMimetypeFromStream(), osg::PNGImageFileType::determineMimetypeFromStream(), osg::MNGImageFileType::determineMimetypeFromStream(), osg::JPGImageFileType::determineMimetypeFromStream(), osg::JP2ImageFileType::determineMimetypeFromStream(), osg::GIFImageFileType::determineMimetypeFromStream(), osg::DDSImageFileType::determineMimetypeFromStream(), osg::BMPImageFileType::determineMimetypeFromStream(), osg::ImageFileType::dump(), osg::TIFImageFileType::read(), osg::PNGImageFileType::read(), osg::JPGImageFileType::read(), osg::JP2ImageFileType::read(), osg::ImageFileType::read(), osg::ImageFileHandler::read(), osg::EXRImageFileType::read(), osg::PNGImageFileType::restoreData(), osg::JPGImageFileType::restoreData(), osg::ImageFileType::restoreData(), osg::ImageFileHandler::store(), osg::PNGImageFileType::storeData(), osg::JPGImageFileType::storeData(), osg::ImageFileType::storeData(), osg::TIFImageFileType::write(), osg::PNGImageFileType::write(), osg::JPGImageFileType::write(), osg::ImageFileType::write(), osg::ImageFileHandler::write(), and osg::EXRImageFileType::write().

{
    return _mimeType.str();
}

const std::list< IDString > & ImageFileType::getSuffixList

(

void

)

const [inherited]

Get method for the suffix list container

Definition at line 134 of file OSGImageFileType.cpp.

References osg::ImageFileType::_suffixList.

Referenced by osg::ImageFileHandler::addImageFileType().

{
    return _suffixList; 
}

UInt32 ImageFileType::getFlags

(

void

)

const [virtual, inherited]

Get method for the flags indicating read/write support. Most image types only support reading.

Definition at line 117 of file OSGImageFileType.cpp.

References osg::ImageFileType::_flags.

Referenced by osg::ImageFileHandler::getSuffixList().

{
    return _flags;
}

const Char8 * ImageFileType::getOptions

(

void

)

[inherited]

Get method for the mime type

Definition at line 124 of file OSGImageFileType.cpp.

References osg::ImageFileType::_options.

Referenced by osg::ImageFileHandler::getOptions().

{
    return _options.c_str();
}

bool ImageFileType::read	(	ImagePtr &	image,
		const Char8 *	fileName
	)			[virtual, inherited]

Reimplemented in osg::DATImageFileType, and osg::HDRImageFileType.

Definition at line 141 of file OSGImageFileType.cpp.

Referenced by osg::ImageFileHandler::read().

{
    std::ifstream is(fileName, std::ios::binary);
    if (is.good() == false)
        return false;
    return read(image, is, std::string());
}

bool ImageFileType::write	(	const ImagePtr &	image,
		const Char8 *	fileName
	)			[virtual, inherited]

Reimplemented in osg::DATImageFileType, and osg::HDRImageFileType.

Definition at line 151 of file OSGImageFileType.cpp.

Referenced by osg::ImageFileHandler::write().

{
    std::ofstream os(fileName, std::ios::binary);
    if (os.good() == false)
        return false;
    return write(image, os, std::string());
}

bool ImageFileType::write	(	const ImagePtr &	image,
		std::ostream &	os,
		const std::string &	mimetype
	)			[virtual, inherited]

Tries to write the image object to the given output stream. Returns true on success.

Reimplemented in osg::BMPImageFileType, osg::EXRImageFileType, osg::HDRImageFileType, osg::JPGImageFileType, osg::MTDImageFileType, osg::PNGImageFileType, osg::PNMImageFileType, and osg::TIFImageFileType.

Definition at line 185 of file OSGImageFileType.cpp.

References osg::endLog(), osg::ImageFileType::getMimeType(), and SWARNING.

{
    SWARNING << getMimeType()
             << " write to stream is not implemented"
             << endLog;
    return false;
}

UInt64 ImageFileType::restore	(	ImagePtr &	image,
		const UChar8 *	buffer,
		Int32	memSize = -1
	)			[static, inherited]

Tries to restore the Imagedata from the given memblock. The buffer must include a ImageFileType::Head data block.

Definition at line 283 of file OSGImageFileType.cpp.

References osg::ImageFileType::Head::dataType, osg::ImageFileType::Head::depth, osg::ImageFileHandler::determineMimetypeFromSuffix(), FDEBUG, osg::ImageFileType::Head::frameCount, osg::ImageFileType::Head::frameDelay, FWARNING, osg::ImageFileType::Head::height, osg::ImageFileType::Head::mipmapCount, osg::ImageFileType::Head::netToHost(), osg::NullFC, osg::Image::OSG_UINT8_IMAGEDATA, osg::ImageFileType::Head::pixelFormat, osg::ImageFileType::Head::sideCount, osg::ImageFileType::Head::suffix, osg::ImageFileHandler::the(), and osg::ImageFileType::Head::width.

Referenced by osg::ClusterViewBuffer::recv(), osg::ImageFileHandler::restore(), and osg::SimpleSceneManager::useOpenSGLogo().

{
    unsigned long   imageSize, headSize = sizeof(Head);
    unsigned long   size = 0, attachmentSize;
    Head            head;
    const UChar8    *data = buffer ? (buffer + headSize) : 0;
    ImageFileType   *type;
    std::string     mimeType;
    Image::Type     dataType;

    if ((image != osg::NullFC) && buffer && (memSize >= headSize)) {

        // Copy header. Otherwise netToHost would change the original
        // data structur.
        memcpy(&head,buffer,sizeof(Head));
        head.netToHost();
        mimeType = ImageFileHandler::the().determineMimetypeFromSuffix(head.suffix);
        
        if((type = ImageFileHandler::the().getFileType(mimeType.c_str(), 0)))
        {
            if (head.dataType)
              dataType = Image::Type(head.dataType);
            else
              dataType = Image::OSG_UINT8_IMAGEDATA;

            image->set(Image::PixelFormat(head.pixelFormat), head.width,
                       head.height, head.depth, head.mipmapCount,
                       head.frameCount, float(head.frameDelay) / 1000.0, 0,
                       dataType,true,head.sideCount );
            imageSize = static_cast<unsigned long>(
                type->restoreData(image, data, memSize - headSize));
            attachmentSize = 0; // head->attachmentSize;

            /*
            if ((attachmentSize = head->attachmentSize))
            {
                attData = (char*)(buffer + headSize + imageSize);
                attKey = attData;
                attValue = 0;
                for (i = 0; i < (attachmentSize-1); i++) {
                    if (attData[i] == 0) 
                        if (attKey) {
                            attValue = &(attData[i+1]);
                            image->setAttachmentField (attKey,attValue);
                            attKey = attValue = 0;
                        }
                        else
                            attKey = &(attData[i+1]);
                }
                if (attKey || attValue) {
                    FFATAL (("Attachment restore error\n"));
                }
            }
            */

            size = headSize + imageSize + attachmentSize;
      
            FDEBUG (( "Restore image data: %lu (%lu/%lu/%lu)\n",
                      size, headSize, imageSize, attachmentSize ));

        }
        else
        {
            imageSize = 0;
            FWARNING(("Can not restore image data, invalid mimeType: %s\n",
                      mimeType.empty() == false ? mimeType.c_str() : "Unknown"));
        }

      
    }

    return size;
}

UInt64 ImageFileType::store	(	const ImagePtr &	image,
		const char *	mimeType,
		UChar8 *	buffer,
		Int32	memSize = -1
	)			[static, inherited]

Tries to store the raster data to the given mem block. Will include a ImageFileType::Head description and the data encoded as 'mimeType'

Definition at line 364 of file OSGImageFileType.cpp.

References osg::ImageFileHandler::getFileType(), osg::ImageFileType::store(), and osg::ImageFileHandler::the().

Referenced by osg::ClusterViewBuffer::send(), osg::ImageFileType::store(), and osg::ImageFileHandler::store().

{
  ImageFileType   *type = ImageFileHandler::the().getFileType(mimeType);
  
  return type ? type->store(image, buffer, memSize) : 0;
}

UInt64 ImageFileType::store	(	const ImagePtr &	image,
		UChar8 *	buffer,
		Int32	memSize = -1
	)			[inherited]

Tries to store the raster data to the given mem block. Will include a ImageFileType::Head description for the derived concreate mimeType.

Definition at line 378 of file OSGImageFileType.cpp.

References osg::ImageFileType::_suffixList, osg::ImageFileType::Head::attachmentSize, osg::ImageFileType::Head::dataType, osg::ImageFileType::Head::depth, FDEBUG, FFATAL, osg::ImageFileType::Head::frameCount, osg::ImageFileType::Head::frameDelay, osg::ImageFileType::Head::height, osg::ImageFileType::Head::hostToNet(), osg::ImageFileType::Head::mipmapCount, osg::ImageFileType::Head::pixelFormat, osg::ImageFileType::Head::sideCount, osg::ImageFileType::storeData(), osg::ImageFileType::Head::suffix, and osg::ImageFileType::Head::width.

{
    Head            *head;
    unsigned long   dataSize = 0, headSize = sizeof(Head);
    unsigned long   attachmentSize;
    UChar8          *dest;
    const UChar8    *src = image->getData();
    std::map<std::string, std::string>::const_iterator aI;
    std::string     value;

    attachmentSize = 0;

    // get attachment size
    /*
    ImageGenericAttPtr att=ImageGenericAttPtr::dcast(
        const_cast<Image*>(image.getCPtr())->findAttachment(
            ImageGenericAtt::getClassType().getGroupId()));
    if(att != NullFC)
    {
        for(i = 0; i < (att->getType().getNumFieldDescs()-1); ++i)
        {
            FieldDescription *fieldDesc=att->getType().getFieldDescription(i);
            Field *field=att->getField(i);
            if (fieldDesc && field) 
            {
                field->getValueByStr(value);
                attachmentSize += strlen( fieldDesc->getName().str() ) + 1;
                attachmentSize += value.length() + 1;
              
                std::cout << fieldDesc->getName().str() << std::endl; 
                std::cout << value << std::endl; 
            }
            else 
            {
                FFATAL (("Invalid Attachment in ImageFileType::store()\n"));
            }
        }
    }
    */

    if (buffer) 
    {
        head = (Head *)buffer;

        head->pixelFormat    = image->getPixelFormat();
        head->width          = image->getWidth();
        head->height         = image->getHeight();
        head->depth          = image->getDepth();
        head->mipmapCount    = image->getMipMapCount();
        head->frameCount     = image->getFrameCount();
        head->frameDelay     = short(image->getFrameDelay() * 1000.0);
        head->sideCount      = image->getSideCount();
        head->dataType       = image->getDataType();
        head->attachmentSize = static_cast<unsigned short>(attachmentSize);
        head->hostToNet();
      
        strcpy(head->suffix, _suffixList.front().str());
      
        dest = (UChar8 *) (buffer + headSize);

        if (src) 
            dataSize = static_cast<unsigned long>(
                storeData(image, dest, memSize - headSize));

        dest = (UChar8 *) (buffer + headSize + dataSize);

        /*
        if(att != NullFC)
        {
            for(i = 0; i < (att->getType().getNumFieldDescs()-1); ++i)
            {
                FieldDescription *fieldDesc=att->getType().getFieldDescription(i);
                Field *field=att->getField(i);
                if (field && fieldDesc) 
                {
                    field->getValueByStr(value);

                    l = strlen( fieldDesc->getName().str() );
                    for (i = 0; i < l; i++)
                      *dest++ = fieldDesc->getName().str()[i];
                    *dest++ = 0;
                    l = value.length();
                    for (i = 0; i < l; i++)
                      *dest++ = value[i];
                    *dest++ = 0;
                }
                else
                {
                    FFATAL (("Invalid Attachment in ImageFileType::store()\n"));
                }
            }
        }
        */

        FDEBUG (( "Store image data: %lu (%lu/%lu/%lu)\n",
                  headSize + dataSize + attachmentSize, headSize, dataSize, 
                  attachmentSize ));
    }
    else {
        FFATAL (("Invalid buffer in ImageFileType::store()\n"));
    }
  
    return (headSize + dataSize + attachmentSize);

}

UInt64 ImageFileType::maxBufferSize

(

const ImagePtr &

image

)

[virtual, inherited]

Returns the max buffer size needed to store the Image (Head + mimeType specific data block)

Definition at line 490 of file OSGImageFileType.cpp.

References FINFO.

Referenced by osg::ClusterViewBuffer::send(), and osg::ImageFileHandler::store().

{
    std::string value;
    unsigned long size, attachmentSize;
    unsigned long imageSize = image->getSize(), headSize = sizeof(Head);

    std::map<std::string, std::string>::const_iterator aI;

    attachmentSize = 0;

    // get attachment size
        /*
    ImageGenericAttPtr att=ImageGenericAttPtr::dcast(
        const_cast<Image*>(image.getCPtr())->findAttachment(
            ImageGenericAtt::getClassType().getGroupId()));
    if(att != NullFC)
    {
        for(i = 0; i < (att->getType().getNumFieldDescs()-1); ++i)
        {
            FieldDescription *fieldDesc=att->getType().getFieldDescription(i);
            Field *field=att->getField(i);
            if (field && fieldDesc) 
            {
                field->getValueByStr(value);
                attachmentSize += strlen( fieldDesc->getName().str() ) + 1;
                attachmentSize += value.length() + 1;
            }
            else 
            {
                FFATAL (("Invalid Attachment in ImageFileType::maxBufferSize()\n"));
            }
        }
    }
        */

    size = headSize + imageSize + attachmentSize;
  
    FINFO (( "ImageFileType::maxBufferSize(): %lu (%lu/%lu/%lu)\n", 
             size, headSize, imageSize, attachmentSize ));
  
    return size;
}

UInt64 ImageFileType::restoreData	(	ImagePtr &	image,
		const UChar8 *	buffer,
		Int32	memSize = -1
	)			[virtual, inherited]

Abstract restore method. Should be overwriten by a concrete derived class. Tries to restore the image data from the given memblock.

Reimplemented in osg::DATImageFileType, osg::EXRImageFileType, osg::HDRImageFileType, osg::JPGImageFileType, osg::MTDImageFileType, and osg::PNGImageFileType.

Definition at line 253 of file OSGImageFileType.cpp.

References FWARNING, and osg::ImageFileType::getMimeType().

{
  FWARNING(("ImageXFileType::restoreData() not impl. for mimeType %s\n",
            getMimeType()));

  return 0;
}

UInt64 ImageFileType::storeData	(	const ImagePtr &	image,
		UChar8 *	buffer,
		Int32	memSize = -1
	)			[virtual, inherited]

Abstract restore method. Should be overwriten by a concrete derived class. Tries to store the given image data to the given memblock

Reimplemented in osg::DATImageFileType, osg::EXRImageFileType, osg::HDRImageFileType, osg::JPGImageFileType, osg::MTDImageFileType, and osg::PNGImageFileType.

Definition at line 268 of file OSGImageFileType.cpp.

References FWARNING, and osg::ImageFileType::getMimeType().

Referenced by osg::ImageFileType::store().

{
  FWARNING(("ImageXFileType::storeData() not impl. for mimeType %s\n",
            getMimeType()));
  
  return 0;
}

void ImageFileType::dump

(

void

)

[inherited]

The dump method just writes some object debugging info to the LOG stream

Definition at line 537 of file OSGImageFileType.cpp.

References osg::ImageFileType::_suffixList, osg::ImageFileType::getMimeType(), osg::LOG_DEBUG, and SLOG.

{
    std::list<IDString>::iterator    sI;

    SLOG << getMimeType();

    if(_suffixList.empty())
    {
        SLOG << ": Suffix: ";
        for(sI = _suffixList.begin(); sI != _suffixList.end(); sI++)
        {
            Log().stream(OSG::LOG_DEBUG) << sI->str() << " ";
        }
    }

    std::cerr << std::endl;
}

---

Member Data Documentation

SGIImageFileType SGIImageFileType::_the [static, private]

Definition at line 119 of file OSGSGIImageFileType.h.

Referenced by the().

std::string osg::ImageFileType::_options [protected, inherited]

Definition at line 182 of file OSGImageFileType.h.

Referenced by osg::ImageFileType::getOptions(), osg::ImageFileType::setOptions(), and osg::TIFImageFileType::write().

---

The documentation for this class was generated from the following files:

• OSGSGIImageFileType.h
• OSGSGIImageFileType.cpp