Tk Source Code

     */

    Tcl_DStringInit(&ds);
    points = Tk_PostscriptFontName(tkfont, &ds);
    fontname = Tcl_DStringValue(&ds);
    Tcl_AppendPrintfToObj(GetPostscriptBuffer(interp),
	    "/%s findfont %d scalefont%s setfont\n",
	    fontname, TkFontGetPoints(psInfoPtr->tkwin, points),
	    strncasecmp(fontname, "Symbol", 7) ? " ISOEncode" : "");
    Tcl_CreateHashEntry(&psInfoPtr->fontTable, Tcl_DStringValue(&ds), &i);
    Tcl_DStringFree(&ds);

    return TCL_OK;
}


    /*
     * Get information used for drawing underlines in generic code on a
     * non-underlined font.
     */

    descent = fontPtr->fm.descent;
    fontPtr->underlinePos = descent / 2;
    fontPtr->underlineHeight = TkFontGetPixels(tkwin, fontPtr->fa.size) / 10;
    if (fontPtr->underlineHeight == 0) {
	fontPtr->underlineHeight = 1;
    }
    if (fontPtr->underlinePos + fontPtr->underlineHeight > descent) {
	/*
	 * If this set of values would cause the bottom of the underline bar
	 * to stick below the descent of the font, jack the underline up a bit

	     *
	     * where N1 is the point size (in points, not decipoints!), and
	     * N2, N3, and N4 are some additional numbers that I don't know
	     * the purpose of, so I ignore them.
	     */

	    faPtr->size = atoi(field[XLFD_POINT_SIZE] + 1);
	} else if (Tcl_GetInt(NULL, field[XLFD_POINT_SIZE],
		&faPtr->size) == TCL_OK) {
	    faPtr->size /= 10;
	} else {
	    return TCL_ERROR;
	}
    }

	     *
	     * where N1 is the pixel size, and where N2, N3, and N4 are some
	     * additional numbers that I don't know the purpose of, so I
	     * ignore them.
	     */

	    faPtr->size = atoi(field[XLFD_PIXEL_SIZE] + 1);
	} else if (Tcl_GetInt(NULL, field[XLFD_PIXEL_SIZE],
		&faPtr->size) != TCL_OK) {
	    return TCL_ERROR;
	}
    }

    faPtr->size = -faPtr->size;

 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */

int

TkFontGetPixels(
    Tk_Window tkwin,		/* For point->pixel conversion factor. */
    int size)			/* Font size. */
{
    double d;

    if (size < 0) {
	return -size;
    }

    d = size * 25.4 / 72.0;
    d *= WidthOfScreen(Tk_Screen(tkwin));
    d /= WidthMMOfScreen(Tk_Screen(tkwin));
    return (int) (d + 0.5);
}

/*
 *---------------------------------------------------------------------------
 *
 * TkFontGetPoints --
 *
 *	Given a font size specification (as described in the TkFontAttributes
 *	structure) return the number of points it represents.
 *
 * Results:
 *	As above.
 *
 * Side effects:
 *	None.
 *
 *---------------------------------------------------------------------------
 */

int

TkFontGetPoints(
    Tk_Window tkwin,		/* For pixel->point conversion factor. */
    int size)			/* Font size. */
{
    double d;

    if (size >= 0) {
	return size;
    }

    d = -size * 72.0 / 25.4;
    d *= WidthMMOfScreen(Tk_Screen(tkwin));
    d /= WidthOfScreen(Tk_Screen(tkwin));
    return (int) (d + 0.5);
}

/*
 *-------------------------------------------------------------------------
 *
 * TkFontGetAliasList --
 *

 * 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. */
};

#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,

				 * attributes. Usually points to
				 * staticSubFonts, but may point to malloced
				 * space if there are lots of SubFonts. */
    SubFont controlSubFont;	/* Font to use to display control-character
				 * expansions. */

    Display *display;		/* Display that owns font. */
    int pixelSize;		/* Original pixel size used when font was
				 * constructed. */
    TkXLFDAttributes xa;	/* Additional attributes that specify the
				 * preferred foundry and encoding to use when
				 * constructing additional SubFonts. */
    int widths[BASE_CHARS];	/* Widths of first 256 chars in the base font,
				 * for handling common case. */
    int underlinePos;		/* Offset from baseline to origin of underline

static void
GetTkFontAttributes(
    XftFont *ftFont,
    TkFontAttributes *faPtr)
{
    const char *family = "Unknown";
    const char *const *familyPtr = &family;
    int weight, slant, size, pxsize;
    double ptsize;

    (void) XftPatternGetString(ftFont->pattern, XFT_FAMILY, 0, familyPtr);
    if (XftPatternGetDouble(ftFont->pattern, XFT_SIZE, 0,
	    &ptsize) == XftResultMatch) {
	size = (int) ptsize;
    } else if (XftPatternGetInteger(ftFont->pattern, XFT_PIXEL_SIZE, 0,
	    &pxsize) == XftResultMatch) {
	size = -pxsize;
    } else {
	size = 12;
    }
    if (XftPatternGetInteger(ftFont->pattern, XFT_WEIGHT, 0,
	    &weight) != XftResultMatch) {
	weight = XFT_WEIGHT_MEDIUM;
    }
    if (XftPatternGetInteger(ftFont->pattern, XFT_SLANT, 0,
	    &slant) != XftResultMatch) {
	slant = XFT_SLANT_ROMAN;
    }

#if DEBUG_FONTSEL
    printf("family %s size %d weight %d slant %d\n",
	    family, size, weight, slant);
#endif /* DEBUG_FONTSEL */

    faPtr->family = Tk_GetUid(family);
    faPtr->size = size;
    faPtr->weight = (weight > XFT_WEIGHT_MEDIUM) ? TK_FW_BOLD : TK_FW_NORMAL;
    faPtr->slant = (slant > XFT_SLANT_ROMAN) ? TK_FS_ITALIC : TK_FS_ROMAN;

    pattern = XftPatternCreate();
    if (faPtr->family) {
	XftPatternAddString(pattern, XFT_FAMILY, faPtr->family);
    }
    if (faPtr->size > 0) {
	XftPatternAddDouble(pattern, XFT_SIZE, (double)faPtr->size);
    } else if (faPtr->size < 0) {
	XftPatternAddInteger(pattern, XFT_PIXEL_SIZE, -faPtr->size);
    } else {
	XftPatternAddDouble(pattern, XFT_SIZE, 12.0);
    }
    switch (faPtr->weight) {
    case TK_FW_NORMAL:
    default:
	weight = XFT_WEIGHT_MEDIUM;

				 * AllocFont() from the original set of font
				 * attributes. Usually points to
				 * staticSubFonts, but may point to malloced
				 * space if there are lots of SubFonts. */
    HWND hwnd;			/* Toplevel window of application that owns
				 * this font, used for getting HDC for
				 * offscreen measurements. */
    int pixelSize;		/* Original pixel size used when font was
				 * constructed. */
    int widths[BASE_CHARS];	/* Widths of first 128 chars in the base font,
				 * for handling common case. The base font is
				 * always used to draw characters between
				 * 0x0000 and 0x007f. */
} WinFont;

static SubFont *	FindSubFontForChar(WinFont *fontPtr, int ch,
			    SubFont **subFontPtrPtr);
static void		FontMapInsert(SubFont *subFontPtr, int ch);
static void		FontMapLoadPage(SubFont *subFontPtr, int row);
static int		FontMapLookup(SubFont *subFontPtr, int ch);
static void		FreeFontFamily(FontFamily *familyPtr);
static HFONT		GetScreenFont(const TkFontAttributes *faPtr,
			    const char *faceName, int pixelSize,
			    double angle);
static void		InitFont(Tk_Window tkwin, HFONT hFont,
			    int overstrike, WinFont *tkFontPtr);
static inline void	InitSubFont(HDC hdc, HFONT hFont, int base,
			    SubFont *subFontPtr);
static int		CreateNamedSystemLogFont(Tcl_Interp *interp,
			    Tk_Window tkwin, const char* name,

static HFONT
GetScreenFont(
    const TkFontAttributes *faPtr,
				/* Desired font attributes for new HFONT. */
    const char *faceName,	/* Overrides font family specified in font
				 * attributes. */
    int pixelSize,		/* Overrides size specified in font
				 * attributes. */
    double angle)		/* What is the desired orientation of the
				 * font. */
{
    Tcl_DString ds;
    HFONT hFont;
    LOGFONT lf;

    memset(&lf, 0, sizeof(lf));
    lf.lfHeight		= -pixelSize;
    lf.lfWidth		= 0;
    lf.lfEscapement	= ROUND16(angle * 10);
    lf.lfOrientation	= ROUND16(angle * 10);
    lf.lfWeight = (faPtr->weight == TK_FW_NORMAL) ? FW_NORMAL : FW_BOLD;
    lf.lfItalic		= faPtr->slant;
    lf.lfUnderline	= faPtr->underline;
    lf.lfStrikeOut	= faPtr->overstrike;