Resolves: tdf#86473 approx 1 pixel high rectangular polygon not drawn
The other implementations of basically this in
vcl/headless/svpgdi.cxx:AddPolygonToPath and
vcl/quartz/salgdicommon.cxx:AddPolygonToPath hook this rounding foo off
getAntiAliasB2DDraw FWIW
Change-Id: Ideec049ec6ca04105721bf8acda44c31b2a73215
(cherry picked from commit 676c9786ff8fac6a6593df51bd9cb3f10854a781)
Reviewed-on: https://gerrit.libreoffice.org/28264
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/canvas/source/cairo/cairo_canvashelper.cxx b/canvas/source/cairo/cairo_canvashelper.cxx
index 9518f0f..4800523 100644
--- a/canvas/source/cairo/cairo_canvashelper.cxx
+++ b/canvas/source/cairo/cairo_canvashelper.cxx
@@ -973,7 +973,27 @@ namespace cairocanvas
if( nPointCount > 1)
{
bool bIsBezier = aPolygon.areControlPointsUsed();
bool bIsRectangle = ::basegfx::tools::isRectangle( aPolygon );
bool bIsRectangle = ::basegfx::tools::isRectangle(aPolygon);
if (bIsRectangle)
{
//tdf#86473, if this rectangle will end up after rounding
//to have no area, then nothing will be drawn, so remove
//such rectangles from the rounding optimization(?) effort
basegfx::B2DRange aRange = ::basegfx::tools::getRange(aPolygon);
double x1 = aRange.getMinX();
double x2 = aRange.getMaxX();
double y1 = aRange.getMinY();
double y2 = aRange.getMaxY();
cairo_matrix_transform_point(&aOrigMatrix, &x1, &y1);
cairo_matrix_transform_point(&aOrigMatrix, &x2, &y2);
basegfx::B2DRange aRoundedRange(basegfx::fround(x1),
basegfx::fround(y1),
basegfx::fround(x2),
basegfx::fround(y2));
bIsRectangle = aRoundedRange.getWidth() != 0.0 &&
aRoundedRange.getHeight() != 0.0;
}
::basegfx::B2DPoint aA, aB, aP;
for( sal_uInt32 j=0; j < nExtendedPointCount; j++ )
