Adding upstream version 4:24.2.0.upstream/4%24.2.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 108 insertions, 0 deletions

diff --git a/include/basegfx/polygon/b2dtrapezoid.hxx b/include/basegfx/polygon/b2dtrapezoid.hxx
new file mode 100644
index 0000000000..aeed7148e2
--- /dev/null
+++ b/include/basegfx/polygon/b2dtrapezoid.hxx
@@ -0,0 +1,108 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <config_options.h>
+#include <basegfx/polygon/b2dpolygon.hxx>
+#include <vector>
+#include <basegfx/basegfxdllapi.h>
+
+
+namespace basegfx { class B2DPolyPolygon; }
+namespace basegfx { class B2DPoint; }
+
+namespace basegfx
+{
+    // class to hold a single trapezoid
+    class UNLESS_MERGELIBS(BASEGFX_DLLPUBLIC) B2DTrapezoid
+    {
+    private:
+        // Geometry data. YValues are down-oriented, this means bottom should
+        // be bigger than top to be below it. The constructor implementation
+        // guarantees:
+
+        // - mfBottomY >= mfTopY
+        // - mfTopXRight >= mfTopXLeft
+        // - mfBottomXRight >= mfBottomXLeft
+        double              mfTopXLeft;
+        double              mfTopXRight;
+        double              mfTopY;
+        double              mfBottomXLeft;
+        double              mfBottomXRight;
+        double              mfBottomY;
+
+    public:
+        // constructor
+        B2DTrapezoid(
+            const double& rfTopXLeft,
+            const double& rfTopXRight,
+            const double& rfTopY,
+            const double& rfBottomXLeft,
+            const double& rfBottomXRight,
+            const double& rfBottomY);
+
+        // data read access
+        const double& getTopXLeft() const { return mfTopXLeft; }
+        const double& getTopXRight() const { return mfTopXRight; }
+        const double& getTopY() const { return mfTopY; }
+        const double& getBottomXLeft() const { return mfBottomXLeft; }
+        const double& getBottomXRight() const { return mfBottomXRight; }
+        const double& getBottomY() const { return mfBottomY; }
+
+        // convenience method to get content as Polygon
+        B2DPolygon getB2DPolygon() const;
+    };
+
+    typedef ::std::vector< B2DTrapezoid > B2DTrapezoidVector;
+
+} // end of namespace basegfx
+
+
+namespace basegfx::utils
+{
+    // convert SourcePolyPolygon to trapezoids. The trapezoids will be appended to
+    // ro_Result. ro_Result will not be cleared. If SourcePolyPolygon contains curves,
+    // it's default AdaptiveSubdivision will be used.
+    // CAUTION: Trapezoids are orientation-dependent in the sense that the upper and lower
+    // lines have to be parallel to the X-Axis, thus this subdivision is NOT simply usable
+    // for primitive decompositions. To use it, the shear and rotate parts of the
+    // involved transformations HAVE to be taken into account.
+    BASEGFX_DLLPUBLIC void trapezoidSubdivide(
+        B2DTrapezoidVector& ro_Result,
+        const B2DPolyPolygon& rSourcePolyPolygon);
+
+    // directly create trapezoids from given edge. Depending on the given geometry,
+    // none up to three trapezoids will be created
+    void createLineTrapezoidFromEdge(
+        B2DTrapezoidVector& ro_Result,
+        const B2DPoint& rPointA,
+        const B2DPoint& rPointB,
+        double fLineWidth);
+
+    // create trapezoids for all edges of the given polygon. The closed state of
+    // the polygon is taken into account. If curves are contained, the default
+    // AdaptiveSubdivision will be used.
+    void createLineTrapezoidFromB2DPolygon(
+        B2DTrapezoidVector& ro_Result,
+        const B2DPolygon& rPolygon,
+        double fLineWidth);
+} // end of namespace basegfx::utils
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */