150 lines
3.0 KiB
Plaintext
150 lines
3.0 KiB
Plaintext
.ds xT X Toolkit Intrinsics \- C Language Interface
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.ds xW Athena X Widgets \- C Language X Toolkit Interface
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.ds xL Xlib \- C Language X Interface
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.ds xC Inter-Client Communication Conventions Manual
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.na
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.de Ds
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.nf
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.\\$1D \\$2 \\$1
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.ft 1
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.\".ps \\n(PS
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.de De
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.fi
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..
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.de FD
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.LP
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.nf
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.de IN \" send an index entry to the stderr
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.de C{
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.ny0
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.TH XFontSetExtents 3X11 "Release 5" "X Version 11" "XLIB FUNCTIONS"
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.SH NAME
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XFontSetExtents \- XFontSetExtents structure
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.SH STRUCTURES
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The
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.ZN XFontSetExtents
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structure contains:
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.LP
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.Ds 0
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.TA .5i 3i
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.ta .5i 3i
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typedef struct {
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XRectangle max_ink_extent; /* over all drawable characters */
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XRectangle max_logical_extent; /* over all drawable characters */
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} XFontSetExtents;
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.De
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.LP
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The
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.ZN XRectangles
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used to return font set metrics are the usual Xlib screen-oriented
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.ZN XRectangles ,
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with x, y giving the upper left corner, and width and height always positive.
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.LP
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The max_ink_extent member gives the maximum extent, over all drawable characters, of
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the rectangles which bound the character glyph image drawn in the
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foreground color, relative to a constant origin.
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See
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.ZN XmbTextExtents
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and
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.ZN XwcTextExtents
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for detailed semantics.
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.LP
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The max_logical_extent member gives the maximum extent,
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over all drawable characters, of the rectangles
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which specify minimum spacing to other graphical features,
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relative to a constant origin.
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Other graphical features drawn by the client, for example,
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a border surrounding the text, should not intersect this rectangle.
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The max_logical_extent member should be used to compute minimum
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inter-line spacing and the minimum area which must be allowed
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in a text field to draw a given number of arbitrary characters.
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.LP
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Due to context-dependent rendering,
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appending a given character to a string may increase
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the string's extent by an amount which exceeds the font's max extent:
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.LP
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.Ds 0
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max possible added extent = (max_extent * <total # chars>) \- prev_string_extent
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.De
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.SH "SEE ALSO"
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XCreateFontSet(3X11),
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XExtentsOfFontSet(3X11),
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XFontsOfFontSet(3X11)
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.br
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\fI\*(xL\fP
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