tdf#49247: draw soft edges

This factors out the common code for blurring used both in glow and
soft edges into ProcessAndBlurAlphaMask.

Also this reverts commit a98bdbae459ad7341bf7f484c402e77e4062cd16,
since its use was removed from VclPixelProcessor2D.

Change-Id: Icd7fdb06bef3932ff3b9ce7e283b515b15d246a5
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/94087
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

2 files changed, 53 insertions, 1 deletions

diff --git a/include/drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx b/include/drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx
index 0c9aa3c0b4ba..687efb1d85ff 100644
--- a/include/drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx
+++ b/include/drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx
@@ -103,7 +103,8 @@
 #define PRIMITIVE2D_ID_POLYPOLYGONSELECTIONPRIMITIVE2D      (PRIMITIVE2D_ID_RANGE_DRAWINGLAYER| 69)
 #define PRIMITIVE2D_ID_PAGEHIERARCHYPRIMITIVE2D             (PRIMITIVE2D_ID_RANGE_DRAWINGLAYER| 70)
 #define PRIMITIVE2D_ID_GLOWPRIMITIVE2D                      (PRIMITIVE2D_ID_RANGE_DRAWINGLAYER| 71)
+#define PRIMITIVE2D_ID_SOFTEDGEPRIMITIVE2D                  (PRIMITIVE2D_ID_RANGE_DRAWINGLAYER| 72)
 // When you add a new primitive, please update the drawinglayer::primitive2d::idToString() function
-// in drawinglayer/source/primitive2d/baseprimitive2d.cxx.
+// in drawinglayer/source/primitive2d/Tools.cxx.
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/include/drawinglayer/primitive2d/softedgeprimitive2d.hxx b/include/drawinglayer/primitive2d/softedgeprimitive2d.hxx
new file mode 100644
index 000000000000..f16e50287b0e
--- /dev/null
+++ b/include/drawinglayer/primitive2d/softedgeprimitive2d.hxx
@@ -0,0 +1,51 @@
+/* -*- 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 <drawinglayer/drawinglayerdllapi.h>
+#include <drawinglayer/primitive2d/groupprimitive2d.hxx>
+
+namespace drawinglayer::primitive2d
+{
+class DRAWINGLAYER_DLLPUBLIC SoftEdgePrimitive2D final : public GroupPrimitive2D
+{
+private:
+    /// Soft edge size, in logical units (100ths of mm)
+    double mfRadius;
+    mutable bool mbInMaskGeneration = false;
+
+public:
+    SoftEdgePrimitive2D(double fRadius, const Primitive2DContainer& rChildren);
+
+    double getRadius() const { return mfRadius; }
+
+    void setMaskGeneration(bool bVal = true) const { mbInMaskGeneration = bVal; }
+
+    virtual bool operator==(const BasePrimitive2D& rPrimitive) const override;
+
+    virtual void
+    get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor,
+                       const geometry::ViewInformation2D& rViewInformation) const override;
+
+    virtual sal_uInt32 getPrimitive2DID() const override;
+};
+} // end of namespace drawinglayer::primitive2d
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */