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| author | dkf <donal.k.fellows@manchester.ac.uk> | 2002-06-14 13:35:46 (GMT) |
|---|---|---|
| committer | dkf <donal.k.fellows@manchester.ac.uk> | 2002-06-14 13:35:46 (GMT) |
| commit | 8abf69416e48492ccda18dcfc6e8adf9d33d0a32 (patch) | |
| tree | c4ad54b29f443e940a51b7b0ca0a9c57e5b65adc /win/tkWinRegion.c | |
| parent | 8c18f8111d03425255bcd1d60b70da5c9ae5f521 (diff) | |
| download | tk-8abf69416e48492ccda18dcfc6e8adf9d33d0a32.zip tk-8abf69416e48492ccda18dcfc6e8adf9d33d0a32.tar.gz tk-8abf69416e48492ccda18dcfc6e8adf9d33d0a32.tar.bz2 | |
TIP#98 implementation; improved photo image copy and GIF frame access
Diffstat (limited to 'win/tkWinRegion.c')
| -rw-r--r-- | win/tkWinRegion.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/win/tkWinRegion.c b/win/tkWinRegion.c index c7be771..8a50620 100644 --- a/win/tkWinRegion.c +++ b/win/tkWinRegion.c @@ -8,7 +8,7 @@ * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tkWinRegion.c,v 1.2 1998/09/14 18:24:01 stanton Exp $ + * RCS: @(#) $Id: tkWinRegion.c,v 1.3 2002/06/14 13:35:49 dkf Exp $ */ #include "tkWinInt.h" @@ -177,3 +177,28 @@ TkRectInRegion(r, x, y, width, height) rect.right = x+width; return RectInRegion((HRGN)r, &rect) ? RectanglePart : RectangleOut; } + +/* + *---------------------------------------------------------------------- + * + * TkSubtractRegion -- + * + * Compute the set-difference of two regions. + * + * Results: + * Returns the result in the dr_return region. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ + +void +TkSubtractRegion(sra, srb, dr_return) + TkRegion sra; + TkRegion srb; + TkRegion dr_return; +{ + CombineRgn((HRGN) dr_return, (HRGN) sra, (HRGN) srb, RGN_DIFF); +} |