home *** CD-ROM | disk | FTP | other *** search
- /* $XConsortium: snfstr.h,v 1.3 91/07/17 22:12:31 keith Exp $ */
- /***********************************************************
- Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
- and the Massachusetts Institute of Technology, Cambridge, Massachusetts.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the names of Digital or MIT not be
- used in advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
- ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
- DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
- ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
- ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- SOFTWARE.
-
- ******************************************************************/
-
- #ifndef SNFSTR_H
- #define SNFSTR_H 1
-
- /*-
- * This file describes the Server Natural Font format.
- * SNF fonts are both CPU-dependent and frame buffer bit order dependent.
- * This file is used by:
- * 1) the server, to hold font information read out of font files.
- * 2) font converters
- *
- * Each font file contains the following
- * data structures, with no padding in-between.
- *
- * 1) The XFONTINFO structure
- * hand-padded to a two-short boundary.
- * maxbounds.byteoffset is the total number of bytes in the
- * glpyh array
- * maxbounds.bitOffset is thetotal width of the unpadded font
- *
- * 2) The XCHARINFO array
- * indexed directly with character codes, both on disk
- * and in memory.
- *
- * 3) Character glyphs
- * padded in the server-natural way, and
- * ordered in the device-natural way.
- * End of glyphs padded to 32-bit boundary.
- *
- * 4) nProps font properties
- *
- * 5) a sequence of null-terminated strings, for font properties
- */
-
- #define FONT_FILE_VERSION 4
-
- typedef struct _snfFontProp {
- CARD32 name; /* offset of string */
- INT32 value; /* number or offset of string */
- Bool indirect; /* value is a string offset */
- } snfFontPropRec;
-
- /*
- * the following macro definitions describe a font file image in memory
- */
- #define ADDRCharInfoRec( pfi) \
- ((snfCharInfoRec *) &(pfi)[1])
-
- #define ADDRCHARGLYPHS( pfi) \
- (((char *) &(pfi)[1]) + BYTESOFCHARINFO(pfi))
-
- /*
- * pad out glyphs to a CARD32 boundary
- */
- #define ADDRXFONTPROPS( pfi) \
- ((snfFontPropRec *) ((char *)ADDRCHARGLYPHS( pfi) + BYTESOFGLYPHINFO(pfi)))
-
- #define ADDRSTRINGTAB( pfi) \
- ((char *)ADDRXFONTPROPS( pfi) + BYTESOFPROPINFO(pfi))
-
- #define n2dChars(pfi) (((pfi)->lastRow - (pfi)->firstRow + 1) * \
- ((pfi)->lastCol - (pfi)->firstCol + 1))
- #define BYTESOFFONTINFO(pfi) (sizeof(snfFontInfoRec))
- #define BYTESOFCHARINFO(pfi) (sizeof(snfCharInfoRec) * n2dChars(pfi))
- #define BYTESOFPROPINFO(pfi) (sizeof(snfFontPropRec) * (pfi)->nProps)
- #define BYTESOFSTRINGINFO(pfi) ((pfi)->lenStrings)
- #define BYTESOFGLYPHINFO(pfi) (((pfi)->maxbounds.byteOffset+3) & ~0x3)
- #define BYTESOFINKINFO(pfi) (sizeof(snfCharInfoRec) * n2dChars(pfi))
-
- typedef struct _snfFontProp *snfFontPropPtr;
- typedef struct _snfCharInfo *snfCharInfoPtr;
- typedef struct _snfFontInfo *snfFontInfoPtr;
-
- typedef struct _snfCharInfo {
- xCharInfo metrics; /* info preformatted for Queries */
- unsigned byteOffset:24; /* byte offset of the raster from pGlyphs */
- Bool exists:1; /* true iff glyph exists for this char */
- unsigned pad:7; /* must be zero for now */
- } snfCharInfoRec;
-
- typedef struct _snfFontInfo {
- unsigned int version1; /* version stamp */
- unsigned int allExist;
- unsigned int drawDirection;
- unsigned int noOverlap; /* true if:
- * max(rightSideBearing-characterWidth) <=
- * minbounds->metrics.leftSideBearing */
- unsigned int constantMetrics;
- unsigned int terminalFont; /* Should be deprecated! true if: constant
- * metrics && leftSideBearing == 0 &&
- * rightSideBearing == characterWidth &&
- * ascent == fontAscent && descent ==
- * fontDescent */
- unsigned int linear:1; /* true if firstRow == lastRow */
- unsigned int constantWidth:1; /* true if
- * minbounds->metrics.characterWidth
- * ==
- * maxbounds->metrics.characterWidth */
- unsigned int inkInside:1; /* true if for all defined glyphs:
- * leftSideBearing >= 0 && rightSideBearing <=
- * characterWidth && -fontDescent <= ascent <=
- * fontAscent && -fontAscent <= descent <=
- * fontDescent */
- unsigned int inkMetrics:1; /* ink metrics != bitmap metrics */
- /* used with terminalFont */
- /* see font's pInk{CI,Min,Max} */
- unsigned int padding:28;
- unsigned int firstCol;
- unsigned int lastCol;
- unsigned int firstRow;
- unsigned int lastRow;
- unsigned int nProps;
- unsigned int lenStrings; /* length in bytes of string table */
- unsigned int chDefault; /* default character */
- int fontDescent; /* minimum for quality typography */
- int fontAscent; /* minimum for quality typography */
- snfCharInfoRec minbounds; /* MIN of glyph metrics over all chars */
- snfCharInfoRec maxbounds; /* MAX of glyph metrics over all chars */
- unsigned int pixDepth; /* intensity bits per pixel */
- unsigned int glyphSets; /* number of sets of glyphs, for sub-pixel
- * positioning */
- unsigned int version2; /* version stamp double-check */
- } snfFontInfoRec;
-
- #endif /* SNFSTR_H */
-