vcl/quartz/salgdiutils.cxx | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
New commits:
commit c26817f9d576893e4b45b3432837b4f1c949098c
Author: Herbert Dürr <h...@apache.org>
Date: Mon Jun 2 11:47:23 2014 +0000
Resolves: #i125020# fix rounding error in AquaSalGraphics::RefreshRect()
Rounding left and width down can accumulate a rounding error of almost two
in
the calculation of right. The existing code compensates for this by
increasing
the width by two, but since left has been decremented by one to accommodate
for
antialiasing artifacts this compensation is one to few by itself and two to
few
when accounting for antialiasing artifacts on the right. Y-pos and height
have
the same problems and get the matching fix.
(cherry picked from commit 073ec69fb970830d39c8700317ee74dbbdfd1fda)
(cherry picked from commit ee9dd6c086f7bda615d5b28d3319a83ce1673607)
Change-Id: Ia394859035d59c76c67b6b0d53ddc6cf88582bfe
Reviewed-on: https://gerrit.libreoffice.org/9626
Tested-by: Christian Lohmaier <lohmaier+libreoff...@googlemail.com>
Reviewed-by: Christian Lohmaier <lohmaier+libreoff...@googlemail.com>
diff --git a/vcl/quartz/salgdiutils.cxx b/vcl/quartz/salgdiutils.cxx
index c251203..704fef5 100644
--- a/vcl/quartz/salgdiutils.cxx
+++ b/vcl/quartz/salgdiutils.cxx
@@ -182,10 +182,13 @@ void AquaSalGraphics::RefreshRect(float lX, float lY,
float lWidth, float lHeigh
{
// update a little more around the designated rectangle
// this helps with antialiased rendering
+ // Rounding down x and width can accumulate a rounding error of up to 2
+ // The decrementing of x, the rounding error and the antialiasing
border
+ // require that the width and the height need to be increased by four
const Rectangle aVclRect(Point(static_cast<long int>(lX-1),
static_cast<long int>(lY-1) ),
- Size( static_cast<long int>(lWidth+2),
- static_cast<long int>(lHeight+2) ) );
+ Size( static_cast<long int>(lWidth+4),
+ static_cast<long int>(lHeight+4) ) );
mpFrame->maInvalidRect.Union( aVclRect );
}
}
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