Crossing the bridge between Ghostscript and GDI+

// GSModule.h: interface for the CGSModule class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_GSMODULE_H__D8F656B4_60BC_40F2_8552_44A40FE805E4__INCLUDED_)
#define AFX_GSMODULE_H__D8F656B4_60BC_40F2_8552_44A40FE805E4__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include <tchar.h>
#include <string>

#ifndef _TSTLSTRING
#define _TSTLSTRING
#ifndef _UNICODE
	namespace std
	{
		typedef ios				_tios;
		typedef string			_tstring;
	}
#else
	namespace std
	{
		typedef wios			_tios;
		typedef wstring			_tstring;
	};
#endif
#endif

namespace gsdll
{

/*!\brief Ghostscript dll loader

This class handles the loading, unloading of gsdll32.dll	
*/
class CModule  
{
public:
	CModule();
	virtual ~CModule();

	HMODULE GetModule();
	bool IsDllLoaded() const;

private:
	void LoadModule();
	HMODULE m_module;
};

typedef struct gsapi_revision_s {
    const char *product;
    const char *copyright;
    long revision;
    long revisiondate;
} gsapi_revision_t;

struct display_callback_s {
    /* Size of this structure */
    /* Used for checking if we have been handed a valid structure */
    int size;

    /* Major version of this structure  */
    /* The major version number will change if this structure changes. */
    int version_major;

    /* Minor version of this structure */
    /* The minor version number will change if new features are added
     * without changes to this structure.  For example, a new color
     * format.
     */
    int version_minor;

    /* New device has been opened */
    /* This is the first event from this device. */
    int (*display_open)(void *handle, void *device);

    /* Device is about to be closed. */
    /* Device will not be closed until this function returns. */
    int (*display_preclose)(void *handle, void *device);

    /* Device has been closed. */
    /* This is the last event from this device. */
    int (*display_close)(void *handle, void *device);

    /* Device is about to be resized. */
    /* Resize will only occur if this function returns 0. */
    /* raster is byte count of a row. */
    int (*display_presize)(void *handle, void *device,
	int width, int height, int raster, unsigned int format);
   
    /* Device has been resized. */
    /* New pointer to raster returned in pimage */
    int (*display_size)(void *handle, void *device, int width, int height, 
	int raster, unsigned int format, unsigned char *pimage);

    /* flushpage */
    int (*display_sync)(void *handle, void *device);

    /* showpage */
    /* If you want to pause on showpage, then don't return immediately */
    int (*display_page)(void *handle, void *device, int copies, int flush);

    /* Notify the caller whenever a portion of the raster is updated. */
    /* This can be used for cooperative multitasking or for
     * progressive update of the display.
     * This function pointer may be set to NULL if not required.
     */
    int (*display_update)(void *handle, void *device, int x, int y, 
	int w, int h);

    /* Allocate memory for bitmap */
    /* This is provided in case you need to create memory in a special
     * way, e.g. shared.  If this is NULL, the Ghostscript memory device 
     * allocates the bitmap. This will only called to allocate the
     * image buffer. The first row will be placed at the address 
     * returned by display_memalloc.
     */
    void *(*display_memalloc)(void *handle, void *device, unsigned long size);

    /* Free memory for bitmap */
    /* If this is NULL, the Ghostscript memory device will free the bitmap */
    int (*display_memfree)(void *handle, void *device, void *mem);
   
};

typedef struct gs_main_instance_s gs_main_instance;
typedef struct display_callback_s display_callback;


#define DISPLAY_VERSION_MAJOR 1
#define DISPLAY_VERSION_MINOR 0

};

#endif // !defined(AFX_GSMODULE_H__D8F656B4_60BC_40F2_8552_44A40FE805E4__INCLUDED_)