+++ /dev/null
-/*
- * tkFont.h --
- *
- * Declarations for interfaces between the generic and platform-specific
- * parts of the font package. This information is not visible outside of
- * the font package.
- *
- * Copyright (c) 1996-1997 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution of
- * this file, and for a DISCLAIMER OF ALL WARRANTIES.
- */
-
-#ifndef _TKFONT
-#define _TKFONT
-
-/*
- * The following structure keeps track of the attributes of a font. It can be
- * used to keep track of either the desired attributes or the actual
- * attributes gotten when the font was instantiated.
- */
-
-struct TkFontAttributes {
- Tk_Uid family; /* Font family, or NULL to represent plaform-
- * specific default system font. */
- int size; /* Pointsize of font, 0 for default size, or
- * negative number meaning pixel size. */
- int weight; /* Weight flag; see below for def'n. */
- int slant; /* Slant flag; see below for def'n. */
- int underline; /* Non-zero for underline font. */
- int overstrike; /* Non-zero for overstrike font. */
-};
-
-/*
- * Possible values for the "weight" field in a TkFontAttributes structure.
- * Weight is a subjective term and depends on what the company that created
- * the font considers bold.
- */
-
-#define TK_FW_NORMAL 0
-#define TK_FW_BOLD 1
-
-#define TK_FW_UNKNOWN -1 /* Unknown weight. This value is used for
- * error checking and is never actually stored
- * in the weight field. */
-
-/*
- * Possible values for the "slant" field in a TkFontAttributes structure.
- */
-
-#define TK_FS_ROMAN 0
-#define TK_FS_ITALIC 1
-#define TK_FS_OBLIQUE 2 /* This value is only used when parsing X font
- * names to determine the closest match. It is
- * only stored in the XLFDAttributes
- * structure, never in the slant field of the
- * TkFontAttributes. */
-
-#define TK_FS_UNKNOWN -1 /* Unknown slant. This value is used for error
- * checking and is never actually stored in
- * the slant field. */
-
-/*
- * The following structure keeps track of the metrics for an instantiated
- * font. The metrics are the physical properties of the font itself.
- */
-
-typedef struct TkFontMetrics {
- int ascent; /* From baseline to top of font. */
- int descent; /* From baseline to bottom of font. */
- int maxWidth; /* Width of widest character in font. */
- int fixed; /* Non-zero if this is a fixed-width font,
- * 0 otherwise. */
-} TkFontMetrics;
-
-/*
- * The following structure is used to keep track of the generic information
- * about a font. Each platform-specific font is represented by a structure
- * with the following structure at its beginning, plus any platform-specific
- * stuff after that.
- */
-
-typedef struct TkFont {
- /*
- * Fields used and maintained exclusively by generic code.
- */
-
- int resourceRefCount; /* Number of active uses of this font (each
- * active use corresponds to a call to
- * Tk_AllocFontFromTable or Tk_GetFont). If
- * this count is 0, then this TkFont structure
- * is no longer valid and it isn't present in
- * a hash table: it is being kept around only
- * because there are objects referring to it.
- * The structure is freed when
- * resourceRefCount and objRefCount are both
- * 0. */
- int objRefCount; /* The number of Tcl objects that reference
- * this structure. */
- Tcl_HashEntry *cacheHashPtr;/* Entry in font cache for this structure,
- * used when deleting it. */
- Tcl_HashEntry *namedHashPtr;/* Pointer to hash table entry that
- * corresponds to the named font that the
- * tkfont was based on, or NULL if the tkfont
- * was not based on a named font. */
- Screen *screen; /* The screen where this font is valid. */
- int tabWidth; /* Width of tabs in this font (pixels). */
- int underlinePos; /* Offset from baseline to origin of underline
- * bar (used for drawing underlines on a
- * non-underlined font). */
- int underlineHeight; /* Height of underline bar (used for drawing
- * underlines on a non-underlined font). */
-
- /*
- * Fields used in the generic code that are filled in by
- * platform-specific code.
- */
-
- Font fid; /* For backwards compatibility with XGCValues
- * structures. Remove when TkGCValues is
- * implemented. */
- TkFontAttributes fa; /* Actual font attributes obtained when the
- * the font was created, as opposed to the
- * desired attributes passed in to
- * TkpGetFontFromAttributes(). The desired
- * metrics can be determined from the string
- * that was used to create this font. */
- TkFontMetrics fm; /* Font metrics determined when font was
- * created. */
- struct TkFont *nextPtr; /* Points to the next TkFont structure with
- * the same name. All fonts with the same name
- * (but different displays) are chained
- * together off a single entry in a hash
- * table. */
-} TkFont;
-
-/*
- * The following structure is used to return attributes when parsing an XLFD.
- * The extra information is of interest to the Unix-specific code when
- * attempting to find the closest matching font.
- */
-
-typedef struct TkXLFDAttributes {
- Tk_Uid foundry; /* The foundry of the font. */
- int slant; /* The tristate value for the slant, which is
- * significant under X. */
- int setwidth; /* The proportionate width, see below for
- * definition. */
- Tk_Uid charset; /* The actual charset string. */
-} TkXLFDAttributes;
-
-/*
- * Possible values for the "setwidth" field in a TkXLFDAttributes structure.
- * The setwidth is whether characters are considered wider or narrower than
- * normal.
- */
-
-#define TK_SW_NORMAL 0
-#define TK_SW_CONDENSE 1
-#define TK_SW_EXPAND 2
-#define TK_SW_UNKNOWN 3 /* Unknown setwidth. This value may be stored
- * in the setwidth field. */
-
-/*
- * The following defines specify the meaning of the fields in a fully
- * qualified XLFD.
- */
-
-#define XLFD_FOUNDRY 0
-#define XLFD_FAMILY 1
-#define XLFD_WEIGHT 2
-#define XLFD_SLANT 3
-#define XLFD_SETWIDTH 4
-#define XLFD_ADD_STYLE 5
-#define XLFD_PIXEL_SIZE 6
-#define XLFD_POINT_SIZE 7
-#define XLFD_RESOLUTION_X 8
-#define XLFD_RESOLUTION_Y 9
-#define XLFD_SPACING 10
-#define XLFD_AVERAGE_WIDTH 11
-#define XLFD_CHARSET 12
-#define XLFD_NUMFIELDS 13 /* Number of fields in XLFD. */
-
-/*
- * Helper macro. How to correctly round a double to a short.
- */
-
-#define ROUND16(x) ((short) floor((x) + 0.5))
-
-/*
- * Low-level API exported by generic code to platform-specific code.
- */
-
-#define TkInitFontAttributes(fa) memset((fa), 0, sizeof(TkFontAttributes));
-#define TkInitXLFDAttributes(xa) memset((xa), 0, sizeof(TkXLFDAttributes));
-
-MODULE_SCOPE int TkFontParseXLFD(const char *string,
- TkFontAttributes *faPtr, TkXLFDAttributes *xaPtr);
-MODULE_SCOPE const char *const * TkFontGetAliasList(const char *faceName);
-MODULE_SCOPE const char *const *const * TkFontGetFallbacks(void);
-MODULE_SCOPE int TkFontGetPixels(Tk_Window tkwin, int size);
-MODULE_SCOPE int TkFontGetPoints(Tk_Window tkwin, int size);
-MODULE_SCOPE const char *const * TkFontGetGlobalClass(void);
-MODULE_SCOPE const char *const * TkFontGetSymbolClass(void);
-MODULE_SCOPE int TkCreateNamedFont(Tcl_Interp *interp, Tk_Window tkwin,
- const char *name, TkFontAttributes *faPtr);
-MODULE_SCOPE int TkDeleteNamedFont(Tcl_Interp *interp,
- Tk_Window tkwin, const char *name);
-MODULE_SCOPE int TkFontGetFirstTextLayout(Tk_TextLayout layout,
- Tk_Font *font, char *dst);
-
-/*
- * Low-level API exported by platform-specific code to generic code.
- */
-
-MODULE_SCOPE void TkpDeleteFont(TkFont *tkFontPtr);
-MODULE_SCOPE void TkpFontPkgInit(TkMainInfo *mainPtr);
-MODULE_SCOPE TkFont * TkpGetFontFromAttributes(TkFont *tkFontPtr,
- Tk_Window tkwin, const TkFontAttributes *faPtr);
-MODULE_SCOPE void TkpGetFontFamilies(Tcl_Interp *interp,
- Tk_Window tkwin);
-MODULE_SCOPE TkFont * TkpGetNativeFont(Tk_Window tkwin, const char *name);
-
-#endif /* _TKFONT */
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