140 lines
2.3 KiB
Plaintext
140 lines
2.3 KiB
Plaintext
.ds tk X Toolkit
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.ds xT X Toolkit Intrinsics \- C Language Interface
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.ds xI Intrinsics
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.ds xW X Toolkit Athena Widgets \- C Language 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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.ds Rn 3
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.ds Vn 2.2
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.hw XtMake-Geometry-Request XtQuery-Geometry wid-get
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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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.\".if \\n(VS>=40 .vs \\n(VSu
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.\".if \\n(VS<=39 .vs \\n(VSp
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.de De
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.de FD
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.LP
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.ne 7
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..
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.ny0
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.TH XtAddExposureToRegion 3Xt "Release 3" "X Version 11" "XT FUNCTIONS"
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.SH NAME
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XtAddExposureToRegion \- merge exposure events into a region
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.SH SYNTAX
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void XtAddExposureToRegion(\fIevent\fP, \fIregion\fP)
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.br
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XEvent *\fIevent\fP;
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.br
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Region \fIregion\fP;
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.SH ARGUMENTS
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.IP \fIevent\fP 1i
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Specifies a pointer to the
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.ZN Expose
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or
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.ZN GraphicsExpose
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event.
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.IP \fIregion\fP 1i
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Specifies the region object (as defined in
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.Pn < X11/Xutil.h >).
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.SH DESCRIPTION
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The
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.ZN XtAddExposureToRegion
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function computes the union of the rectangle defined by the exposure
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event and the specified region.
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Then, it stores the results back in region.
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If the event argument is not an
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.ZN Expose
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or
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.ZN GraphicsExpose
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event,
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.ZN XtAddExposureToRegion
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returns without an error and without modifying region.
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.LP
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This function is used by the exposure compression mechanism
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(see Section 7.9.3).
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.SH "SEE ALSO"
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.br
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\fI\*(xT\fP
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.br
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\fI\*(xL\fP
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