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/*
* ipdbP.h
* Private things for ipdb*.c.
*
* Copyright (C) 1997 Eric A. Howe
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Authors: Eric A. Howe (mu@trends.net)
*/
#ifndef IMGVTOPGM_IPDBP_H
#define IMGVTOPGM_IPDBP_H
MU_HID(imgvtopgm_ipdbP_h, "$Mu: imgvtopgm/mine/ipdbP.h 1.2 1999/05/09 08:02:22 $")
#include <mine/sex.h>
/*
* Pixel setting macros.
*/
#define setg16pixel(b,v,o) ((b) |= ((v) << (4 - 4*(o))))
#define getg16pixel(b,o) (((b) >> (4 - 4*(o))) & 0x0f)
#define setgpixel(b,v,o) ((b) |= ((v) << (6 - 2*(o))))
#define getgpixel(b,o) (((b) >> (6 - 2*(o))) & 0x03)
#define setmpixel(b,v,o) ((b) |= ((v) << (7 - (o))))
#define getmpixel(b,o) (((b) >> (7 - (o))) & 0x01)
/*
* Pixels/byte.
*/
#define img_ppb(i) ( \
(i)->type == IMG_GRAY ? 4 : \
(i)->type == IMG_GRAY16 ? 2 : \
8 \
)
/*
* Size (in bytes) of an image's data.
*/
#define img_size(i) (size_t)((i)->width/img_ppb(i)*(i)->height)
/*
* Return the start of row `r'.
*/
#define img_row(i, r) (&(i)->data[(r)*(i)->width/img_ppb(i)])
/*
* Only use four bytes of these.
*/
#define IPDB_vIMG "vIMG"
#define IPDB_View "View"
/*
* Only use three bytes of this.
*/
#define IPDB_MYST "\x40\x6f\x80"
CDECLS_BEGIN
extern IPDB *ipdb_clear(IPDB *);
extern PDBHEAD *pdbhead_alloc(const char *);
extern PDBHEAD *pdbhead_free(PDBHEAD *);
extern RECHDR *rechdr_alloc(int, u4);
extern RECHDR *rechdr_free(RECHDR *);
extern IMAGE *image_alloc(const char *, int, int, int);
extern IMAGE *image_free(IMAGE *);
extern TEXT *text_alloc(const char *);
extern TEXT *text_free(TEXT *);
CDECLS_END
#endif
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