zgv.h

zgv-5.6,一个Linux系统下的图片浏览器(VGA/SVGA)

/* zgv 5.6 - GIF, JPEG and PBM/PGM/PPM viewer, for VGA PCs running Linux.
 * Copyright (C) 1993-2002 Russell Marks. See README for license details.
 *
 * zgv.h - constants, typedefs.
 */

#define ZGV_VER		"5.6"


#define _PIC_OK			 0
#define _PICERR_NOFILE		-1
#define _PICERR_NOMEM		-2
#define _PICERR_BADMAGIC	-3
#define _PICERR_NOCOLOURMAP	-4
#define _PICERR_NOIMAGE		-5
#define _PICERR_UNSUPPORTED	-6
#define _PICERR_CORRUPT		-7
#define _PICERR_SEE_ERRMSG	-8
#define _PICERR_ISRLE		-9
#define _PICERR_TOOMANYCOLS	-10
#define _PICERR_BADXCOL		-11

/* not a real error, but used internally by readgif.c */
#define _PICERR_NOMORE		-12

/* macro often used to close input file and return an error from above */
#define CLOSE_AND_RET(x)	do { fclose(in); return(x); } while(0)

/* size of error message buffer used by read{jpeg,png}.c */
#define JPEG_PNG_ERRMSG_SIZE	256

/* required by the PCD support for an unsightly kludge. OTOH, there
 * isn't an obviously nicer way to do it. :-/ The value must be
 * something other than 0, 1, and -1.
 */
#define PIC_INCR_RELOAD_KLUDGE	42


typedef struct
  {
  int width,height;
  int bpp,numcols;
  } PICINFO;

typedef void (*hffunc)(int,int);

typedef unsigned char byte;

extern int idx_light,idx_medium,idx_dark,idx_black,idx_blacknz;
extern int tagview_mode;
extern int zgv_ttyfd;
extern int has_mouse;
extern char jpeg_png_errmsg[];
extern int fs_vgamode;		/* needed by msgbox() and helppage() */

extern void file_details(char *filename,int w,int h,int *need_redraw_ptr);
extern void wait_for_foreground(void);

/* vgadrawtext_bmp() needs to know what the current colour is, so... */
extern int current_colour;
#define vga_setcolor(x) vga_setcolor(current_colour=(x))

/* make 15/16-bit colours, used in a few different places */
#define GET15BITCOLOUR(r,g,b) ((((r)&0xf8)<<7)|(((g)&0xf8)<<2)|((b)>>3))
#define GET16BITCOLOUR(r,g,b) ((((r)&0xf8)<<8)|(((g)&0xfc)<<3)|((b)>>3))