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/* This is an include file which describes the interface to
the TeX PK font file access routines. */
/* Maximum number of glyphs (and maximum glyph_id) in a PK file is 127 */
#define PKFILESPECLENGTH 255
#define PKMAXGLYPH 127
#define PKMAXFONTSIZE 100000
/* Various constants for items in the PK file. See PKtoPX.WEB. */
#define PK_XXX1 240
#define PK_XXX2 241
#define PK_XXX3 242
#define PK_XXX4 243
#define PK_YYY 244
#define PK_POST 245
#define PK_NO_OP 246
#define PK_PRE 247
#define PK_ID 89
typedef struct pk_font {
char *fontname; /* a pointer to the fontname */
char *filespec; /* a pointer to the filespec */
int magnification; /* in (1.2^n) * 1000 units */
int design_size; /* in 2^-16 points */
int checksum; /* should match TFM file */
int h_pixels_per_point; /* * 2^16 */
int v_pixels_per_point; /* * 2^16 */
unsigned char *fontstream; /* ptr to memory image of PK font */
unsigned char *fontidx; /* first unread char in stream */
int fontsize; /* size of memory image */
unsigned char *packed_glyphs[PKMAXGLYPH+1]; /* unexpanded glyphs */
struct pk_glyph *unpacked_glyphs[PKMAXGLYPH+1];/* expanded glyphs */
} PKFont;
typedef struct pk_glyph {
int glyph_id; /* The character id */
PKFont *fontptr; /* pointer to the PKfont structure */
unsigned char *rasters; /* pointer to the expanded rasters */
unsigned char *prasters; /* ptr to the packed rasters */
unsigned tfm_width; /* in FIXes (2^-20 * design_size) */
unsigned width; /* of minimum bound box in pixels */
unsigned height; /* of minimum bound box in pixels */
int h_offset; /* in pixels */
int v_offset; /* in pixels */
unsigned h_escapement; /* in pixels * 2^16 */
unsigned v_escapement; /* in pixels * 2^16 */
unsigned dyn_f : 4; /* see PKtoPX.WEB :-) */
unsigned color : 1; /* initial run: black(1) | white(0) */
unsigned nybflag : 1; /* nybble bit: upper or lower */
} PKGlyph;
#ifdef ANSIC
extern PKFont *PKLoadFont( char *fontname, int magnification );
extern PKGlyph *PKGetNextGlyph( char *fontname );
extern PKGlyph *PKGetGlyph( PKFont *fontptr, int glyphid );
extern PKGlyph *PKGetGlyphInfo( PKFont *fontptr, int glyphid );
extern void PKFreeGlyph( int glyphid );
extern void PKUnloadFont( PKFont *fontptr );
#else
extern PKFont *PKLoadFont();
extern PKGlyph *PKGetNextGlyph();
extern PKGlyph *PKGetGlyph();
extern PKGlyph *PKGetGlyphInfo();
extern void PKFreeGlyph();
extern void PKUnloadFont();
#endif
/* global variables */
extern char PKerror[]; /* stores last err message */
extern unsigned char PKbitmask[9][8]; /* see pkgbl.c */
extern unsigned char PKbytereversal[256]; /* see pkgbl.c */
/* Macros */
/* Here are my macros convert various sized Big-Endian integers into integers
will always be correct under C. Yes,I know that an overlay (union) is faster
but these act like a function. And that to me, makes them more useful.
[[The comma (",") operator is most (and only?) useful in macros.]] */
#ifndef BIG_ENDIAN
#define Get_8Bit_Signed(ptr) \
(ptr += 1, \
( (char *) ptr)[-1] \
)
#define Get_8Bit_Unsigned(ptr) \
(ptr += 1, \
((unsigned char *) ptr)[-1] \
)
#define Get_16Bit_Signed(ptr) \
(ptr += 2, \
( (char *) ptr)[-2] * 0x100 + \
((unsigned char *) ptr)[-1] \
)
#define Get_16Bit_Unsigned(ptr) \
(ptr += 2, \
((unsigned char *) ptr)[-2] * 0x100 + \
((unsigned char *) ptr)[-1] \
)
#define Get_24Bit_Singed(ptr) \
(ptr += 3, \
( (char *) ptr)[-3] * 0x10000 + \
((unsigned char *) ptr)[-2] * 0x100 + \
((unsigned char *) ptr)[-1] \
)
#define Get_24Bit_Unsigned(ptr) \
(ptr += 3, \
((unsigned char *) ptr)[-3] * 0x10000 + \
((unsigned char *) ptr)[-2] * 0x100 + \
((unsigned char *) ptr)[-1] \
)
#define Get_32Bit_Signed(ptr) \
(ptr += 4, \
( (char *) ptr)[-4] * 0x1000000 + \
((unsigned char *) ptr)[-3] * 0x10000 + \
((unsigned char *) ptr)[-2] * 0x100 + \
((unsigned char *) ptr)[-1] \
)
#define Get_32Bit_Unsigned(ptr) \
(ptr += 4, \
((unsigned char *) ptr)[-4] * 0x1000000 + \
((unsigned char *) ptr)[-3] * 0x10000 + \
((unsigned char *) ptr)[-2] * 0x100 + \
((unsigned char *) ptr)[-1] \
)
#else
#define Get_8Bit_Signed(ptr) \
(ptr += 1, \
( (char *) ptr)[-1] \
)
#define Get_8Bit_Unsigned(ptr) \
(ptr += 1, \
((unsigned char *) ptr)[-1] \
)
#define Get_16Bit_Signed(ptr) \
(ptr += 2, \
( (char *) ptr)[-1] * 0x100 + \
((unsigned char *) ptr)[-2] \
)
#define Get_16Bit_Unsigned(ptr) \
(ptr += 2, \
((unsigned char *) ptr)[-1] * 0x100 + \
((unsigned char *) ptr)[-2] \
)
#define Get_24Bit_Singed(ptr) \
(ptr += 3, \
( (char *) ptr)[-1] * 0x10000 + \
((unsigned char *) ptr)[-2] * 0x100 + \
((unsigned char *) ptr)[-3] \
)
#define Get_24Bit_Unsigned(ptr) \
(ptr += 3, \
((unsigned char *) ptr)[-1] * 0x10000 + \
((unsigned char *) ptr)[-2] * 0x100 + \
((unsigned char *) ptr)[-3] \
)
#define Get_32Bit_Signed(ptr) \
(ptr += 4, \
( (char *) ptr)[-1] * 0x1000000 + \
((unsigned char *) ptr)[-2] * 0x10000 + \
((unsigned char *) ptr)[-3] * 0x100 + \
((unsigned char *) ptr)[-4] \
)
#define Get_32Bit_Unsigned(ptr) \
(ptr += 4, \
((unsigned char *) ptr)[-1] * 0x1000000 + \
((unsigned char *) ptr)[-2] * 0x10000 + \
((unsigned char *) ptr)[-3] * 0x100 + \
((unsigned char *) ptr)[-4] \
)
#endif
#define BitMask(count,bitpos) (PKbitmask[count][bitpos])
#ifdef PKLTOR
# define CopyByte( byte ) ((unsigned char) PKbytereversal[byte])
# define ReverseByte( byte ) ((unsigned char) byte)
#else
# define CopyByte( byte ) ((unsigned char) byte)
# define ReverseByte( byte ) ((unsigned char) PKbytereversal[byte])
#endif
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