From 628b75715c99df9716ab487f1bb1cad0f086d7ea Mon Sep 17 00:00:00 2001
From: Armin Le Grand <alg@apache.org>
Date: Wed, 23 Jul 2014 16:35:32 +0000
Subject: [PATCH 058/137] Resolves: fdo#81598 #i125300# enhanced handling of
multiple ClipRegions...
in MetafileProcessor
(cherry picked from commit 02e2c7b225036c6478a1f7e8315a9c8361025a7f)
Change-Id: Iefefc36c040507795bc2c25fe8d4a610eb12adb9
(cherry picked from commit 2ddfaf1f03135c10d33e0e99ebe8a56d3783d214)
Reviewed-on: https://gerrit.libreoffice.org/10505
Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>
---
.../source/processor2d/vclmetafileprocessor2d.cxx | 65 ++++++++++++++++++----
1 file changed, 54 insertions(+), 11 deletions(-)
diff --git a/drawinglayer/source/processor2d/vclmetafileprocessor2d.cxx b/drawinglayer/source/processor2d/vclmetafileprocessor2d.cxx
index 94fc972..e6b2dd5 100644
--- a/drawinglayer/source/processor2d/vclmetafileprocessor2d.cxx
+++ b/drawinglayer/source/processor2d/vclmetafileprocessor2d.cxx
@@ -1760,17 +1760,52 @@ namespace drawinglayer
if(maClipPolyPolygon.count())
{
- // there is already a clip polygon set; build clipped union of
- // current mask polygon and new one
- maClipPolyPolygon = basegfx::tools::clipPolyPolygonOnPolyPolygon(
- aMask,
- maClipPolyPolygon,
- true, // #i106516# we want the inside of aMask, not the outside
- false);
+ // due to the cost of PolyPolygon clipping and numerical reasons try first if the current
+ // and the new ClipRegion are ranges. If yes, processing can be simplified
+ if(basegfx::tools::isRectangle(aMask)
+ && basegfx::tools::isRectangle(maClipPolyPolygon))
+ {
+ // both ClipPolygons are rectangles
+ if(aMask.getB2DRange().equal(maClipPolyPolygon.getB2DRange()))
+ {
+ // equal -> no change in ClipRegion needed, leave
+ // maClipPolyPolygon unchanged
+ }
+ else
+ {
+ // not equal -> create new ClipRegion from the two ranges
+ basegfx::B2DRange aClipRange(aMask.getB2DRange());
+
+ aClipRange.intersect(maClipPolyPolygon.getB2DRange());
+
+ if(aClipRange.isEmpty())
+ {
+ // no common ClipRegion -> set empty ClipRegion, no content to show
+ maClipPolyPolygon.clear();
+ }
+ else
+ {
+ // use common ClipRegion as new ClipRegion
+ maClipPolyPolygon = basegfx::B2DPolyPolygon(
+ basegfx::tools::createPolygonFromRect(aClipRange));
+ }
+ }
+ }
+ else
+ {
+ // The current ClipRegion or the new one is not a rectangle;
+ // there is already a clip polygon set; build clipped union of
+ // current mask polygon and new one
+ maClipPolyPolygon = basegfx::tools::clipPolyPolygonOnPolyPolygon(
+ aMask,
+ maClipPolyPolygon,
+ true, // #i106516# we want the inside of aMask, not the outside
+ false);
+ }
}
else
{
- // use mask directly
+ // use new mask directly as ClipRegion
maClipPolyPolygon = aMask;
}
@@ -1779,8 +1814,13 @@ namespace drawinglayer
// set VCL clip region; subdivide before conversion to tools polygon. Subdivision necessary (!)
// Removed subdivision and fixed in Region::ImplPolyPolyRegionToBandRegionFunc() in VCL where
// the ClipRegion is built from the Polygon. A AdaptiveSubdivide on the source polygon was missing there
- mpOutputDevice->Push(PUSH_CLIPREGION);
- mpOutputDevice->SetClipRegion(Region(maClipPolyPolygon));
+ const bool bNewClipRegion(maClipPolyPolygon != aLastClipPolyPolygon);
+
+ if(bNewClipRegion)
+ {
+ mpOutputDevice->Push(PUSH_CLIPREGION);
+ mpOutputDevice->SetClipRegion(Region(maClipPolyPolygon));
+ }
// recursively paint content
// #i121267# Only need to process sub-content when clip polygon is *not* empty.
@@ -1788,7 +1828,10 @@ namespace drawinglayer
process(rMaskCandidate.getChildren());
// restore VCL clip region
- mpOutputDevice->Pop();
+ if(bNewClipRegion)
+ {
+ mpOutputDevice->Pop();
+ }
}
// restore to rescued clip polygon
--
1.9.3