tdf#156066: Add support for feImage filter

Change-Id: I76cf8932ae352c271283483c9c734408a35b6074
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/153770
Tested-by: Jenkins
Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>

1 files changed, 134 insertions, 0 deletions

diff --git a/svgio/source/svgreader/svgfeimagenode.cxx b/svgio/source/svgreader/svgfeimagenode.cxx
new file mode 100644
index 000000000000..56121739fe87
--- /dev/null
+++ b/svgio/source/svgreader/svgfeimagenode.cxx
@@ -0,0 +1,134 @@
+/* -*- 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 .
+ */
+
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+#include <vcl/graphicfilter.hxx>
+#include <drawinglayer/primitive2d/bitmapprimitive2d.hxx>
+#include <svgfeimagenode.hxx>
+#include <o3tl/string_view.hxx>
+#include <svgdocument.hxx>
+#include <comphelper/base64.hxx>
+#include <tools/stream.hxx>
+#include <rtl/uri.hxx>
+
+namespace svgio::svgreader
+{
+SvgFeImageNode::SvgFeImageNode(SvgDocument& rDocument, SvgNode* pParent)
+    : SvgNode(SVGToken::FeImage, rDocument, pParent)
+{
+}
+
+SvgFeImageNode::~SvgFeImageNode() {}
+
+void SvgFeImageNode::parseAttribute(const OUString& /*rTokenName*/, SVGToken aSVGToken,
+                                    const OUString& aContent)
+{
+    // parse own
+    switch (aSVGToken)
+    {
+        case SVGToken::Style:
+        {
+            readLocalCssStyle(aContent);
+            break;
+        }
+        case SVGToken::Href:
+        case SVGToken::XlinkHref:
+        {
+            const sal_Int32 nLen(aContent.getLength());
+
+            if (nLen)
+            {
+                OUString aXLink;
+                readImageLink(aContent, aXLink, maUrl, maData);
+            }
+            break;
+        }
+
+        default:
+        {
+            break;
+        }
+    }
+}
+
+void SvgFeImageNode::apply(drawinglayer::primitive2d::Primitive2DContainer& rTarget) const
+{
+    BitmapEx aBitmapEx;
+
+    if (!maData.isEmpty())
+    {
+        // use embedded base64 encoded data
+        css::uno::Sequence<sal_Int8> aPass;
+        ::comphelper::Base64::decode(aPass, maData);
+
+        if (aPass.hasElements())
+        {
+            SvMemoryStream aStream(aPass.getArray(), aPass.getLength(), StreamMode::READ);
+            Graphic aGraphic;
+
+            if (ERRCODE_NONE
+                == GraphicFilter::GetGraphicFilter().ImportGraphic(aGraphic, u"", aStream))
+            {
+                aBitmapEx = aGraphic.GetBitmapEx();
+            }
+        }
+    }
+    else if (!maUrl.isEmpty())
+    {
+        const OUString& rPath = getDocument().getAbsolutePath();
+        OUString aAbsUrl;
+        try
+        {
+            aAbsUrl = rtl::Uri::convertRelToAbs(rPath, maUrl);
+        }
+        catch (rtl::MalformedUriException& e)
+        {
+            SAL_WARN("svg", "caught rtl::MalformedUriException \"" << e.getMessage() << "\"");
+        }
+
+        if (!aAbsUrl.isEmpty() && rPath != aAbsUrl)
+        {
+            SvFileStream aStream(aAbsUrl, StreamMode::STD_READ);
+            Graphic aGraphic;
+
+            if (ERRCODE_NONE
+                == GraphicFilter::GetGraphicFilter().ImportGraphic(aGraphic, aAbsUrl, aStream))
+            {
+                aBitmapEx = aGraphic.GetBitmapEx();
+            }
+        }
+    }
+
+    if (!aBitmapEx.IsEmpty() && 0 != aBitmapEx.GetSizePixel().Width()
+        && 0 != aBitmapEx.GetSizePixel().Height())
+    {
+        basegfx::B2DRange aViewBox
+            = rTarget.getB2DRange(drawinglayer::geometry::ViewInformation2D());
+        const drawinglayer::primitive2d::Primitive2DReference xRef(
+            new drawinglayer::primitive2d::BitmapPrimitive2D(
+                aBitmapEx, basegfx::utils::createScaleTranslateB2DHomMatrix(
+                               aViewBox.getRange(), aViewBox.getMinimum())));
+
+        rTarget = drawinglayer::primitive2d::Primitive2DContainer{ xRef };
+    }
+}
+
+} // end of namespace svgio::svgreader
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */