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authorthb <thb@openoffice.org>2009-10-16 00:57:35 +0200
committerthb <thb@openoffice.org>2009-10-16 00:57:35 +0200
commit7bae8837395d6f4ab80d01ee9525820ced425a51 (patch)
tree7ca2d26dc840c7d8ee2bcb1794e53837cd1cef08 /basegfx/inc/basegfx/tools
parent8454c5ef5057d0d24e52fb9ed10483b598da98b0 (diff)
#i105939# Adds clip state handling class to basegfx; makes use of that also from slideshow
Diffstat (limited to 'basegfx/inc/basegfx/tools')
-rw-r--r--basegfx/inc/basegfx/tools/b2dclipstate.hxx119
1 files changed, 119 insertions, 0 deletions
diff --git a/basegfx/inc/basegfx/tools/b2dclipstate.hxx b/basegfx/inc/basegfx/tools/b2dclipstate.hxx
new file mode 100644
index 000000000000..7d336d8cb48e
--- /dev/null
+++ b/basegfx/inc/basegfx/tools/b2dclipstate.hxx
@@ -0,0 +1,119 @@
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2008 by Sun Microsystems, Inc.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * $RCSfile: rectcliptools.hxx,v $
+ * $Revision: 1.3 $
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org. If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef _BGFX_TOOLS_CLIPSTATE_HXX
+#define _BGFX_TOOLS_CLIPSTATE_HXX
+
+#include <sal/types.h>
+#include <o3tl/cow_wrapper.hxx>
+
+//////////////////////////////////////////////////////////////////////////////
+
+namespace basegfx
+{
+ class B2DRange;
+ class B2DPolyRange;
+ class B2DPolygon;
+ class B2DPolyPolygon;
+
+ namespace tools
+ {
+ class ImplB2DClipState;
+
+ /** This class provides an optimized, symbolic clip state for graphical output
+
+ Having a current 'clip' state is a common attribute of
+ almost all graphic output APIs, most of which internally
+ represent it via a list of rectangular bands. In contrast,
+ this implementation purely uses symbolic clips, but in a
+ quite efficient manner, deferring actual evaluation until
+ a clip representation is requested, and using faster code
+ paths for common special cases (like all-rectangle clips)
+ */
+ class B2DClipState
+ {
+ public:
+ typedef o3tl::cow_wrapper< ImplB2DClipState > ImplType;
+
+ private:
+ ImplType mpImpl;
+
+ public:
+ /// Init clip, in 'cleared' state - everything is visible
+ B2DClipState();
+ ~B2DClipState();
+ B2DClipState( const B2DClipState& );
+ explicit B2DClipState( const B2DRange& );
+ explicit B2DClipState( const B2DPolygon& );
+ explicit B2DClipState( const B2DPolyPolygon& );
+ B2DClipState& operator=( const B2DClipState& );
+
+ /// unshare this poly-range with all internally shared instances
+ void makeUnique();
+
+ /// Set clip to 'null' - nothing is visible
+ void makeNull();
+ /// returns true when clip is 'null' - nothing is visible
+ bool isNull() const;
+
+ /// Set clip 'cleared' - everything is visible
+ void makeClear();
+ /// returns true when clip is 'cleared' - everything is visible
+ bool isCleared() const;
+
+ bool operator==(const B2DClipState&) const;
+ bool operator!=(const B2DClipState&) const;
+
+ void unionRange(const B2DRange& );
+ void unionPolygon(const B2DPolygon& );
+ void unionPolyPolygon(const B2DPolyPolygon& );
+ void unionClipState(const B2DClipState& );
+
+ void intersectRange(const B2DRange& );
+ void intersectPolygon(const B2DPolygon& );
+ void intersectPolyPolygon(const B2DPolyPolygon& );
+ void intersectClipState(const B2DClipState& );
+
+ void subtractRange(const B2DRange& );
+ void subtractPolygon(const B2DPolygon& );
+ void subtractPolyPolygon(const B2DPolyPolygon& );
+ void subtractClipState(const B2DClipState& );
+
+ void xorRange(const B2DRange& );
+ void xorPolygon(const B2DPolygon& );
+ void xorPolyPolygon(const B2DPolyPolygon& );
+ void xorClipState(const B2DClipState& );
+
+ B2DPolyPolygon getClipPoly() const;
+ };
+ }
+}
+
+#endif // _BGFX_TOOLS_CLIPSTATE_HXX