PGF

From Ogre Wiki

About PGF

PGF is a relatively new image codec like JPG but which compresses better in most cases. For more information and downloading libPGF (which includes a command line tool for compressing) see http://libpgf.org.

Loading PGF in Ogre

OgrePGFCodec.h:

/*
-----------------------------------------------------------------------------
Copyright (c) 2006 by Urs Hanselmann

Permission is hereby granted, free of charge, to any person obtaining a copy 
of this software and associated documentation files (the "Software"), to deal 
in the Software without restriction, including without limitation the rights 
to use, copy, modify, merge,  publish, distribute, sublicense, and/or sell 
copies of the Software, and to permit persons to whom the Software is 
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included 
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-----------------------------------------------------------------------------
*/
#ifndef _PGFImageCodec_H__
#define _PGFImageCodec_H__

#include "OgreImageCodec.h"

namespace Ogre {

/**
 * PGF codec for Ogre. See http://libpgf.org
 */
 class PGFCodec : public Ogre::ImageCodec
{
private:
   
   /** Common decoding routine **/
   static unsigned char *decodePGF (unsigned char *data, size_t len, int &w, int &h);

public:
   PGFCodec();
   virtual ~PGFCodec();
   
   virtual String getType() const;
   
   DataStreamPtr code(Ogre::MemoryDataStreamPtr& input, Codec::CodecDataPtr& pData) const;
   void codeToFile(MemoryDataStreamPtr& input, const String& outFileName, Codec::CodecDataPtr& pData) const;
   Codec::DecodeResult decode(DataStreamPtr& input) const;
      
   static PGFCodec *ptr;
   /** Static method to startup and register the PGF codec **/
   static void startup(void);
   /** Static method to shutdown and unregister the PGF codec **/
   static void shutdown(void);
};

}

#endif 

OgrePGFCodec.cpp:

/*
-----------------------------------------------------------------------------
Copyright (c) 2006 by Urs Hanselmann

Permission is hereby granted, free of charge, to any person obtaining a copy 
of this software and associated documentation files (the "Software"), to deal 
in the Software without restriction, including without limitation the rights 
to use, copy, modify, merge,  publish, distribute, sublicense, and/or sell 
copies of the Software, and to permit persons to whom the Software is 
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included 
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-----------------------------------------------------------------------------
*/
#include "OgreStableHeaders.h"

#include "OgreRoot.h"
#include "OgreRenderSystem.h"
#include "OgrePGFCodec.h"
#include "OgreLogManager.h"
#include "OgreException.h"

#include "libpgf/PGFimage.h"

namespace Ogre
{

PGFCodec *PGFCodec::ptr = NULL;

UINT8 *PGFCodec::decodePGF (UINT8 *data, size_t len, int &w, int &h)
{
   // init PGF object
   CPGFImage pgf;
   // init PGF memory stream
   CPGFMemoryStream s(&data, len);
   
   // open PGF image
   try
   {
      pgf.Open(&s);
      
      pgf.Read(0);
   }
   catch (IOException& e)
   {
      return NULL;
   }
   
   // get properties
   w = pgf.Width();
   h = pgf.Height();
   
   // decode image
   UINT8 *imgdata = new UINT8[pgf.Width()*pgf.Height()*3];
   pgf.GetBitmap(pgf.Width()*3, (UINT8 *)imgdata, 24);
   
   return imgdata;
}

void PGFCodec::startup ()
{
   LogManager::getSingleton().logMessage(LML_NORMAL, "Registering PGF codec");
   
   // startup and register PGF codec
   ptr = new PGFCodec ();
   Codec::registerCodec(ptr);
}

void PGFCodec::shutdown ()
{
   // shutdown and unregister PGF codec
   Codec::unRegisterCodec (ptr);
   delete ptr;
}

PGFCodec::PGFCodec()
{
}

String PGFCodec::getType() const
{
   return "pgf";
}

DataStreamPtr PGFCodec::code(MemoryDataStreamPtr& input, Codec::CodecDataPtr& pData) const
{
   OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "Encoding not yet supported", "PRFImageCodec::code");
}

void PGFCodec::codeToFile(MemoryDataStreamPtr& input, const String& outFileName, Codec::CodecDataPtr& pData) const
{
   OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED, "Encoding not yet supported", "PRFImageCodec::codeToFile");
}

Codec::DecodeResult PGFCodec::decode(DataStreamPtr& input) const
{
   MemoryDataStream memStream(input, true);
   
   // decode image from PGF mem stream
   int w, h;
   UINT8 *data = decodePGF ((UINT8*)memStream.getPtr(), memStream.size(), w, h);
   ImageData* imgData = new ImageData();
   MemoryDataStreamPtr output(new MemoryDataStream(data, imgData->size, true));
   
   // set image properties
   imgData->depth = 1;
   imgData->width = w;
   imgData->height = h;
   imgData->num_mipmaps = 0;
   imgData->flags = 0;
   imgData->format = PF_R8G8B8;
   unsigned dstPitch = imgData->width * PixelUtil::getNumElemBytes(imgData->format);
   imgData->size = dstPitch * imgData->height;
   
   // return decoded image
   DecodeResult ret;
   ret.first = output;
   ret.second = CodecDataPtr(imgData);
   return ret;
}

PGFCodec::~PGFCodec()
{
}

}

Just add this 2 files to your project and link against libPGF. Call PGFCodec::startup() at startup and PGFCodec::shutdown() at shutdown.