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/* -----------------------------------------------------------------
GEM - Graphics Environment for Multimedia
Load an image and return the frame(OS independent interface)
Copyright (c) 2011-2011 IOhannes m zmölnig. forum::für::umläute. IEM. zmoelnig@iem.at
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "GEM.LICENSE.TERMS" in this distribution.
-----------------------------------------------------------------*/
#ifndef _INCLUDE__GEM_PLUGINS_IMAGELOADER_H_
#define _INCLUDE__GEM_PLUGINS_IMAGELOADER_H_
#include "Gem/Image.h"
#include "Gem/Properties.h"
#include <string>
/*-----------------------------------------------------------------
-------------------------------------------------------------------
CLASS
imageloader
interface for the system- and library-dependent imageloader classes
KEYWORDS
pix load an image
DESCRIPTION
-----------------------------------------------------------------*/
namespace gem
{
namespace plugins
{
class GEM_EXTERN imageloader
{
public:
//////////
// returns an instance wrapping all plugins or NULL
// if NULL is returned, you might still try your luck with manually accessing the
// PluginFactory
static imageloader*getInstance(void);
////////
// dtor must be virtual
virtual ~imageloader(void);
/* read a image
*
* props can be filled by the loader with additional information on the image
* e.g. EXIF tags,...
*/
/* returns TRUE if loading was successful, FALSE otherwise */
virtual bool load(std::string filename,
imageStruct&result,
gem::Properties&props) = 0;
/* returns TRUE if this object can be used from within a thread */
virtual bool isThreadable(void) = 0;
};
};
}; // namespace gem
/**
* \fn REGISTER_IMAGELOADERFACTORY(const char *id, Class imageloaderClass)
* registers a new class "imageloaderClass" with the imageloader-factory
*
* \param id a symbolic (const char*) ID for the given class
* \param imageloaderClass a class derived from "imageloader"
*/
#define REGISTER_IMAGELOADERFACTORY(id, TYP) static gem::PluginFactoryRegistrar::registrar<TYP, gem::plugins::imageloader> fac_imageloader_ ## TYP (id)
#endif // for header file
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