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/* gos720 src/gos/include/aixfont.h 1.5 */
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/* COPYRIGHT International Business Machines Corp. 1989,1997 */
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/* @(#)92 1.5 src/gos/include/aixfont.h, resmgr, gos720 6/9/97 15:48:09 */
#ifndef __aixFONT__
#define __aixFONT__
/*
* This file describes the AIX Font format for X11R6
*
* Each font file contains the following data structures. There is no
* padding between these data structures.
*
* 1) The FontInfo structure
* maxbounds.byteoffset is the total number of bytes in the
* glpyh array
*
* 2) The CharInfo array
* character bounds (metrics)
* offsets to glyphs
* indexed directly with character codes
*
* 3) Character glyphs
* most significant bit/byte first
* end of glyphs padded to 32-bit boundary.
* raster format:
* each scanline padded to a byte boundary
* stroke format:
* 2 byte number of x,y coordinates
* 2 byte pairs of x,y coordinates
* sxxxxxx1syyyyyyf
* where
* s - sign bit
* x - relative x coordinate
* y - relative y coordinate
* f - flag: 0 = draw, 1 = move
*
* 4) Properties (optional)
* named properties
* property is a value or null-terminated strings
* character encodings are stored as properties
*
* 5) Ink metrics (optional)
* character "ink" metrics
* minimum bounds followed by
* maximum bounds followed by
* per character bounds
* indexed directly with character codes
*
*
* Note: An X11 Release 6 FontInfo structure from fontstruct.h
* will map exactly onto an aixFontInfo structure, except
* for the font properties at the end.
*
* An X11 Release 6 CharInfo structure from fontstruct.h
* will map exactly onto an aixCharInfo structure, except
* that CharInfo has pointers to glyphs while aixCharInfo
* contains glyph offsets from the glyph base.
*
*/
#define FONT_FILE_VERSION 6
typedef struct _aixFontProp {
unsigned int name; /* offset of string */
int value; /* a number or a string offset */
char *isStringProp; /* */
} aixFontProp, *aixFontPropPtr;
/*
Must match xCharInfo from X11/Xproto.h
*/
typedef struct {
short leftSideBearing,
rightSideBearing,
characterWidth,
ascent,
descent;
unsigned short attributes;
} xxCharInfo;
/*
First part must match xCharInfo from X11/Xproto.h
*/
typedef struct _aixCharInfo {
short leftSideBearing,
rightSideBearing,
characterWidth,
ascent,
descent;
unsigned short attributes; /* must be zero */
unsigned int byteOffset:24; /* byte offset of raster from pGlyphs */
unsigned int exists:1; /* true iff glyph exists for this char */
unsigned int pad:7; /* reserved - must be zero */
} aixCharInfo, *aixCharInfoPtr;
typedef struct _aixFontInfo {
unsigned short firstCol; /* */
unsigned short lastCol; /* */
unsigned short firstRow; /* */
unsigned short lastRow; /* */
unsigned short defaultCh; /* default character */
unsigned int noOverlap:1; /* see note (1) */
unsigned int terminalFont:1; /* see note (2) */
unsigned int constantMetrics:1;/* */
unsigned int constantWidth:1; /* see note (3) */
unsigned int inkInside:1; /* see note (4) */
unsigned int inkMetrics:1; /* see note (5) */
unsigned int allExist:1; /* */
unsigned int drawDirection:2; /* */
unsigned int cachable:1; /* */
unsigned int anamorphic:1; /* */
short maxOverlap; /* */
short pad; /* */
xxCharInfo maxbounds; /* MAX of glyph metrics over all chars */
xxCharInfo minbounds; /* MIN of glyph metrics over all chars */
xxCharInfo ink_maxbounds; /* MAX of ink metrics over all chars */
xxCharInfo ink_minbounds; /* MIN of ink metrics over all chars */
short fontAscent; /* minimum for quality typography */
short fontDescent; /* minimum for quality typography */
int nprops; /* */
int props; /* really FontPropPtr */
int isStringProp; /* really char * */
} aixFontInfo, *aixFontInfoPtr;
/********************
* for compatibility
********************/
#define chDefault defaultCh
#define nProps nprops
/*
* note (1) noOverlap true if max(rightSideBearing-characterWidth)
* <= minbounds->metrics.leftSideBearing
*
* note (2) terminalFont Should be deprecated! true if:
* constant metrics && leftSideBearing == 0 &&
* rightSideBearing == characterWidth &&
* ascent == fontAscent && descent == fontDescent
*
* note (3) constantWidth true if minbounds->metrics.characterWidth
* == maxbounds->metrics.characterWidth
*
* note (4) inkInside true if for all defined glyphs:
* leftSideBearing >= 0 &&
* rightSideBearing <= characterWidth &&
* -fontDescent <= ascent <= fontAscent &&
* -fontAscent <= descent <= fontDescent
*
* note (5) inkMetrics ink metrics != bitmap metrics used with
* terminalFont. See font's pInk{CI,Min,Max}
*
* note (6) glyphSets used for sub-pixel positioning
*/
typedef unsigned char *aixGlyphPtr;
#define NUMCHARS(pfi) (((pfi)->lastCol - (pfi)->firstCol + 1) * \
((pfi)->lastRow - (pfi)->firstRow + 1))
#define BYTESOFFONTINFO(pfi) (sizeof(aixFontInfo))
#define BYTESOFCHARINFO(pfi) (sizeof(aixCharInfo) * NUMCHARS(pfi))
#define BYTESOFPROPINFO(pfi) (sizeof(aixFontProp) * (pfi)->nProps)
#define BYTESOFSTRINGINFO(pfi) ((pfi)->lenStrings)
#define BYTESOFGLYPHINFO(pfi) (((pfi)->maxbounds.byteOffset+3) & ~0x3)
#define BYTESOFINKINFO(pfi) (sizeof(aixCharInfo) * (2 + NUMCHARS(pfi)))
#endif /* __aixFONT__ */