226 lines
5.7 KiB
Plaintext
226 lines
5.7 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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.TH XmbTextPerCharExtents 3X11 "Release 5" "X Version 11" "XLIB FUNCTIONS"
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.SH NAME
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XmbTextPerCharExtents, XwcTextPerCharExtents \- obtain per-character information for a text string
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.SH SYNTAX
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Status XmbTextPerCharExtents\^(\^\fIfont_set\fP\^, \fIstring\fP\^, \fInum_bytes\fP\^, \fIink_array_return\fP\^,
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.br
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\fIlogical_array_return\fP\^, \fIarray_size\fP\^, \fInum_chars_return\fP\^, \fIoverall_return\fP\^)
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.br
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XFontSet \fIfont_set\fP\^;
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.br
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char *\fIstring\fP\^;
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.br
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int \fInum_bytes\fP\^;
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.br
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XRectangle *\fIink_array_return\fP\^;
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.br
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XRectangle *\fIlogical_array_return\fP\^;
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.br
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int \fIarray_size\fP\^;
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.br
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int *\fInum_chars_return\fP\^;
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.br
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XRectangle *\fIoverall_ink_return\fP\^;
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.br
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XRectangle *\fIoverall_logical_return\fP\^;
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.LP
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Status XwcTextPerCharExtents\^(\^\fIfont_set\fP\^, \fIstring\fP\^, \fInum_wchars\fP\^, \fIink_array_return\fP\^,
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.br
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\fIlogical_array_return\fP\^, \fIarray_size\fP\^, \fInum_chars_return\fP\^, \fIoverall_return\fP\^)
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.br
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XFontSet \fIfont_set\fP\^;
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.br
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wchar_t *\fIstring\fP\^;
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.br
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int \fInum_wchars\fP\^;
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.br
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XRectangle *\fIink_array_return\fP\^;
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.br
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XRectangle *\fIlogical_array_return\fP;
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.br
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int \fIarray_size\fP\^;
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.br
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int *\fInum_chars_return\fP\^;
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.br
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XRectangle *\fIoverall_ink_return\fP\^;
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.br
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XRectangle *\fIoverall_logical_return\fP\^;
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.SH ARGUMENTS
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.IP \fIarray_size\fP 1i
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Specifies the size of ink_array_return and logical_array_return.
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Note that the caller must pass in arrays of this size.
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.\" $Header: fontset.a,v 1.2 88/05/09 14:28:06 mento Exp $
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.IP \fIfont_set\fP 1i
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Specifies the font set.
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.IP \fIink_array_return\fP 1i
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Returns the ink dimensions for each character.
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.IP \fIlogical_array_return\fP 1i
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Returns the logical dimensions for each character.
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.IP \fInum_bytes\fP 1i
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Specifies the number of bytes in the string argument.
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.IP \fInum_chars_return\fP 1i
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Returns the number characters in the string argument.
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.IP \fInum_wchars\fP 1i
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Specifies the number of characters in the string argument.
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.ds Ov extents of the entire string
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.IP \fIoverall_ink_return\fP 1i
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Returns the overall ink \*(Ov.
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.IP \fIoverall_logical_return\fP 1i
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Returns the overall logical \*(Ov.
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.\" $Header: string.a,v 1.1 88/02/26 10:31:32 mento Exp $
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.IP \fIstring\fP 1i
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Specifies the character string.
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.SH DESCRIPTION
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The
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.ZN XmbTextPerCharExtents
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and
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.ZN XwcTextPerCharExtents
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return the text dimensions of each character of the specified text,
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using the fonts loaded for the specified font set.
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Each successive element of ink_array_return and logical_array_return
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is set to the successive character's drawn metrics,
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relative to the drawing origin of the string, one
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.ZN XRectangle
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for each character in the supplied text string.
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The number of elements of ink_array_return and logical_array_return
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that have been set is returned to num_chars_return.
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.LP
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Each element of ink_array_return is set to the bounding box
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of the corresponding character's drawn foreground color.
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Each element of logical_array_return is set to the bounding box
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which provides minimum spacing to other graphical features
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for the corresponding character.
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Other graphical features should not intersect any of the
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logical_array_return rectangles.
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.LP
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Note that an
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.ZN XRectangle
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represents the effective drawing dimensions of the character,
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regardless of the number of font glyphs that are used to draw
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the character, or the direction in which the character is drawn.
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If multiple characters map to a single character glyph,
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the dimensions of all the
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.ZN XRectangles
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of those characters are the same.
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.LP
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When the
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.ZN XFontSet
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has missing charsets, metrics for each unavailable
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character are taken from the default string returned by
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.ZN XCreateFontSet ,
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so that the metrics represent the text as it will actually be drawn.
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The behavior for an invalid codepoint is undefined.
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.LP
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If the array_size is too small for the number of characters in the
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supplied text, the functions return zero
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and num_chars_return is set to the number of rectangles required.
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Otherwise, the routines return a non-zero value.
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.LP
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If the overall_ink_return or overall_logical_return argument is non-NULL,
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.ZN XmbTextPerCharExtents
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and
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.ZN XwcTextPerCharExtents
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return the maximum extent of the string's metrics to overall_ink_return
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or overall_logical_return, as returned by
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.ZN XmbTextExtents
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or
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.ZN XwcTextExtents .
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.SH "SEE ALSO"
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XmbTextEscapement(3X11),
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XmbTextExtents(3X11)
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\fI\*(xL\fP
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