R6.6 is the Xorg base-line

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+/* $Xorg: fontstruct.h,v 1.3 2000/08/18 04:05:44 coskrey Exp $ */
+/***********************************************************
+Copyright 1987 by Digital Equipment Corporation, Maynard, 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 name of Digital 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 FONTSTR_H
+#define FONTSTR_H
+
+#include <X11/Xproto.h>
+#include "font.h"
+#include <X11/Xfuncproto.h>
+
+/*
+ * This version of the server font data strucutre is only for describing
+ * the in memory data structure. The file structure is not necessarily a
+ * copy of this. That is up to the compiler and the OS layer font loading
+ * machinery.
+ */
+
+#define GLYPHPADOPTIONS 4	/* 1, 2, 4, or 8 */
+
+typedef struct _FontProp {
+    long        name;
+    long        value;		/* assumes ATOM is not larger than INT32 */
+}           FontPropRec;
+
+typedef struct _FontResolution {
+    unsigned short x_resolution;
+    unsigned short y_resolution;
+    unsigned short point_size;
+}           FontResolutionRec;
+
+typedef struct _ExtentInfo {
+    DrawDirection drawDirection;
+    int         fontAscent;
+    int         fontDescent;
+    int         overallAscent;
+    int         overallDescent;
+    int         overallWidth;
+    int         overallLeft;
+    int         overallRight;
+}           ExtentInfoRec;
+
+typedef struct _CharInfo {
+    xCharInfo   metrics;	/* info preformatted for Queries */
+    char       *bits;		/* pointer to glyph image */
+}           CharInfoRec;
+
+/*
+ * Font is created at font load time. It is specific to a single encoding.
+ * e.g. not all of the glyphs in a font may be part of a single encoding.
+ */
+
+typedef struct _FontInfo {
+    unsigned short firstCol;
+    unsigned short lastCol;
+    unsigned short firstRow;
+    unsigned short lastRow;
+    unsigned short defaultCh;
+    unsigned int noOverlap:1;
+    unsigned int terminalFont:1;
+    unsigned int constantMetrics:1;
+    unsigned int constantWidth:1;
+    unsigned int inkInside:1;
+    unsigned int inkMetrics:1;
+    unsigned int allExist:1;
+    unsigned int drawDirection:2;
+    unsigned int cachable:1;
+    unsigned int anamorphic:1;
+    short       maxOverlap;
+    short       pad;
+    xCharInfo   maxbounds;
+    xCharInfo   minbounds;
+    xCharInfo   ink_maxbounds;
+    xCharInfo   ink_minbounds;
+    short       fontAscent;
+    short       fontDescent;
+    int         nprops;
+    FontPropPtr props;
+    char       *isStringProp;
+}           FontInfoRec;
+
+typedef struct _Font {
+    int         refcnt;
+    FontInfoRec info;
+    char        bit;
+    char        byte;
+    char        glyph;
+    char        scan;
+    fsBitmapFormat format;
+    int         (*get_glyphs) (
+#if NeedNestedPrototypes
+	FontPtr         /* font */,
+	unsigned long   /* count */,
+	unsigned char * /* chars */,
+	FontEncoding    /* encoding */,
+	unsigned long * /* count */,
+	CharInfoPtr *   /* glyphs */
+#endif
+);
+    int         (*get_metrics) ( 
+#if NeedNestedPrototypes
+	FontPtr         /* font */,
+	unsigned long   /* count */,
+	unsigned char * /* chars */,
+	FontEncoding    /* encoding */,
+	unsigned long * /* count */,
+	xCharInfo **    /* glyphs */
+#endif
+);
+    void        (*unload_font) ( 
+#if NeedNestedPrototypes
+	FontPtr         /* font */
+#endif
+);
+    void        (*unload_glyphs) ( 
+#if NeedNestedPrototypes
+	FontPtr         /* font */
+#endif
+);
+    FontPathElementPtr fpe;
+    pointer     svrPrivate;
+    pointer     fontPrivate;
+    pointer     fpePrivate;
+    int		maxPrivate;
+    pointer	*devPrivates;
+}           FontRec;
+
+extern Bool	_FontSetNewPrivate (/* pFont, n, ptr */);
+extern int	AllocateFontPrivateIndex ();
+
+#define FontGetPrivate(pFont,n) ((n) > (pFont)->maxPrivate ? (pointer) 0 : \
+			     (pFont)->devPrivates[n])
+
+#define FontSetPrivate(pFont,n,ptr) ((n) > (pFont)->maxPrivate ? \
+			_FontSetNewPrivate (pFont, n, ptr) : \
+			((((pFont)->devPrivates[n] = (ptr)) != 0) || TRUE))
+
+typedef struct _FontNames {
+    int         nnames;
+    int         size;
+    int        *length;
+    char      **names;
+}           FontNamesRec;
+
+/* External view of font paths */
+typedef struct _FontPathElement {
+    int         name_length;
+    char       *name;
+    int         type;
+    int         refcount;
+    pointer     private;
+}           FontPathElementRec;
+
+typedef struct _FPEFunctions {
+    int         (*name_check) (
+#if NeedFunctionPrototypes
+			       char* /* name */
+#endif
+			       );
+    int         (*init_fpe) (
+#if NeedNestedPrototypes
+			     FontPathElementPtr /* fpe */
+#endif
+			     );
+    int         (*reset_fpe) (
+#if NeedNestedPrototypes
+			     FontPathElementPtr /* fpe */
+#endif
+			     );
+    int         (*free_fpe) (
+#if NeedNestedPrototypes
+			     FontPathElementPtr /* fpe */
+#endif
+			     );
+    int         (*open_font) (
+#if NeedNestedPrototypes
+			      pointer /* client */,
+			      FontPathElementPtr /* fpe */,
+			      int /* flags */,
+			      char* /* name */,
+			      int /* namelen */,
+			      fsBitmapFormat /* format */,
+			      fsBitmapFormatMask /* fmask */,
+			      unsigned long /* id (type XID or FSID) */,
+			      FontPtr* /* pFont */,
+			      char** /* aliasName */,
+			      FontPtr /* non_cachable_font */
+#endif
+			      );
+
+    int         (*close_font) (
+#if NeedNestedPrototypes
+			       FontPathElementPtr /* fpe */,
+			       FontPtr /* pFont */
+#endif
+			       );
+    int         (*list_fonts) (
+#if NeedNestedPrototypes
+			       pointer /* client */,
+			       FontPathElementPtr /* fpe */,
+			       char* /* pat */,
+			       int /* len */,
+			       int /* max */,
+			       FontNamesPtr /* names */
+#endif
+			       );
+    int         (*start_list_fonts_and_aliases) (
+#if NeedNestedPrototypes
+						 pointer /* client */,
+						 FontPathElementPtr /* fpe */,
+						 char* /* pat */,
+						 int /* len */,
+						 int /* max */,
+						 pointer* /* privatep */
+#endif
+						 );
+    int         (*list_next_font_or_alias) (
+#if NeedNestedPrototypes
+					    pointer /* client */,
+					    FontPathElementPtr /* fpe */,
+					    char** /* namep */,
+					    int* /* namelenp */,
+					    char** /* resolvedp */,
+					    int* /* resolvedlenp */,
+					    pointer /* private */
+#endif
+					    );
+    int         (*start_list_fonts_with_info) (
+#if NeedNestedPrototypes
+					       pointer /* client */,
+					       FontPathElementPtr /* fpe */,
+					       char* /* pat */,
+					       int /* patlen */,
+					       int /* maxnames */,
+					       pointer* /* privatep */
+#endif
+					       );
+    int         (*list_next_font_with_info) (	/* client, fpe, name, namelen,
+					         info, num, data */
+#if NeedNestedPrototypes
+					     pointer /* client */,
+					     FontPathElementPtr /* fpe */,
+					     char** /* name */,
+					     int* /* namelen */,
+					     FontInfoPtr* /* info */,
+					     int* /* numFonts */,
+					     pointer /* private */
+#endif
+					     );
+    int         (*wakeup_fpe) (
+#if NeedNestedPrototypes
+			       FontPathElementPtr /* fpe */,
+			       unsigned long* /* LastSelectMask */
+#endif
+			       );
+    int		(*client_died) (
+#if NeedNestedPrototypes
+				pointer /* client */,
+				FontPathElementPtr /* fpe */
+#endif
+				);
+		/* for load_glyphs, range_flag = 0 ->
+			nchars = # of characters in data
+			item_size = bytes/char
+			data = list of characters
+		   range_flag = 1 ->
+			nchars = # of fsChar2b's in data
+			item_size is ignored
+			data = list of fsChar2b's */
+    int		(*load_glyphs) (
+#if NeedNestedPrototypes
+				pointer /* client */,
+				FontPtr /* pfont */,
+				Bool /* range_flag */,
+				unsigned int /* nchars */,
+				int /* item_size */,
+				unsigned char* /* data */
+#endif
+				);
+    void	(*set_path_hook)(
+#if NeedFunctionPrototypes
+				 void
+#endif
+				 );
+}           FPEFunctionsRec, FPEFunctions;
+
+extern int  InitFPETypes();
+
+/*
+ * Various macros for computing values based on contents of
+ * the above structures
+ */
+
+#define	GLYPHWIDTHPIXELS(pci) \
+	((pci)->metrics.rightSideBearing - (pci)->metrics.leftSideBearing)
+
+#define	GLYPHHEIGHTPIXELS(pci) \
+ 	((pci)->metrics.ascent + (pci)->metrics.descent)
+
+#define	GLYPHWIDTHBYTES(pci)	(((GLYPHWIDTHPIXELS(pci))+7) >> 3)
+
+#define GLYPHWIDTHPADDED(bc)	(((bc)+7) & ~0x7)
+
+#define BYTES_PER_ROW(bits, nbytes) \
+	((nbytes) == 1 ? (((bits)+7)>>3)	/* pad to 1 byte */ \
+	:(nbytes) == 2 ? ((((bits)+15)>>3)&~1)	/* pad to 2 bytes */ \
+	:(nbytes) == 4 ? ((((bits)+31)>>3)&~3)	/* pad to 4 bytes */ \
+	:(nbytes) == 8 ? ((((bits)+63)>>3)&~7)	/* pad to 8 bytes */ \
+	: 0)
+
+#define BYTES_FOR_GLYPH(ci,pad)	(GLYPHHEIGHTPIXELS(ci) * \
+				 BYTES_PER_ROW(GLYPHWIDTHPIXELS(ci),pad))
+/*
+ * Macros for computing different bounding boxes for fonts; from
+ * the font protocol
+ */
+
+#define FONT_MAX_ASCENT(pi)	((pi)->fontAscent > (pi)->ink_maxbounds.ascent ? \
+			    (pi)->fontAscent : (pi)->ink_maxbounds.ascent)
+#define FONT_MAX_DESCENT(pi)	((pi)->fontDescent > (pi)->ink_maxbounds.descent ? \
+			    (pi)->fontDescent : (pi)->ink_maxbounds.descent)
+#define FONT_MAX_HEIGHT(pi)	(FONT_MAX_ASCENT(pi) + FONT_MAX_DESCENT(pi))
+#define FONT_MIN_LEFT(pi)	((pi)->ink_minbounds.leftSideBearing < 0 ? \
+			    (pi)->ink_minbounds.leftSideBearing : 0)
+#define FONT_MAX_RIGHT(pi)	((pi)->ink_maxbounds.rightSideBearing > \
+				(pi)->ink_maxbounds.characterWidth ? \
+			    (pi)->ink_maxbounds.rightSideBearing : \
+				(pi)->ink_maxbounds.characterWidth)
+#define FONT_MAX_WIDTH(pi)	(FONT_MAX_RIGHT(pi) - FONT_MIN_LEFT(pi))
+
+#endif				/* FONTSTR_H */