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/* $Id: memory.h,v 1.9 2005/07/31 15:30:39 soyt Exp $
******************************************************************************

   Display-memory: headers

   Copyright (C) 1997 Andreas Beck		[becka@ggi-project.org]
   Copyright (C) 1998-2000 Marcus Sundberg	[marcus@ggi-project.org]

   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 AUTHOR(S) 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 _GGI_DISPLAY_MEMORY_H
#define _GGI_DISPLAY_MEMORY_H

#include <ggi/internal/ggi-dl.h>


#define INPBUFSIZE	8192
#define MEMINPMAGIC	'M'

#ifdef HAVE_SYS_SHM_H

#define HAVE_SHM
#include <sys/shm.h>

#elif defined(HAVE_WINDOWS_H)

#define HAVE_SHM

/* Very rudimentary mapping from unix shm api to win32 file mapping api */

#include <windows.h>

#define shmget(key, size, shmflg) \
    (int)CreateFileMapping( \
	INVALID_HANDLE_VALUE, \
	NULL, \
	PAGE_READWRITE | SEC_COMMIT, \
	0, /* size not larger than 2^32, I hope. */ \
	size, \
	key)
#define shmat(shmid, shmaddr, shmflg) \
	MapViewOfFile((HANDLE)shmid, FILE_MAP_WRITE, 0, 0, 0)
#define shmdt(shmaddr) \
	UnmapViewOfFile(shmaddr)
#define shmctl(shmid, cmd, buf) \
	CloseHandle((HANDLE)shmid)

#endif /* HAVE_SYS_SHM_H */

ggifunc_getmode			GGI_memory_getmode;
ggifunc_setmode			GGI_memory_setmode;
ggifunc_getapi			GGI_memory_getapi;
ggifunc_checkmode		GGI_memory_checkmode;
ggifunc_setflags		GGI_memory_setflags;
ggifunc_setPalette	GGI_memory_setPalette;

enum memtype {
	MT_MALLOC, 	/* No parameters  : memory is malloced */
	MT_EXTERN, 	/* only a pointer : draw there. Take care it
			   is big enough. */
	MT_SHMID, 	/* "shmid:%i"     : map shared memory at shmid */
	MT_SHMKEYFILE 	/* "keyfile:%c:%s": create and map shared mem
			   corresponding to keyfile see ftok */
};

typedef struct {
	int writeoffset;	/* We should lock access to that one ... */
	int visx,visy,virtx,virty,frames,visframe,type;
	char buffer[1];		/* This index will be used "overflowing" */
} inpbuffer;

typedef struct {
	PHYSZ_DATA

	enum memtype   	memtype;
	void	       *memptr;
	inpbuffer      *inputbuffer;
	int		inputoffset;
	ggi_pixel	r_mask, g_mask, b_mask, a_mask;
	int		fstride;
	int		noblank;
	ggifunc_fillscreen     *oldfillscreen;
	ggi_bufferlayout	layout;
        union {
		ggi_pixellinearbuffer plb;
                ggi_pixelplanarbuffer plan;
        } buffer;

#ifdef HAVE_SHM
	int		shmid;
#endif
} ggi_memory_priv;

#define MEMORY_PRIV(vis) ((ggi_memory_priv *)LIBGGI_PRIVATE(vis))

int _GGI_memory_resetmode(ggi_visual *vis);

#endif /* _GGI_DISPLAY_MEMORY_H */