Create SvmWriter Class

This is the initial form of the SvmWriter Class. It's job will be
to separate MetaFile write functionality from metaact.hxx

Change-Id: I59f437850d355ccd1f64a6bd5decd2c52e354d81

4 files changed, 153 insertions, 1 deletions

diff --git a/include/vcl/filter/SvmWriter.hxx b/include/vcl/filter/SvmWriter.hxx
new file mode 100644
index 000000000000..5b57d969b80b
--- /dev/null
+++ b/include/vcl/filter/SvmWriter.hxx
@@ -0,0 +1,43 @@
+/* -*- 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 <memory>
+#include <vcl/gdimtf.hxx>
+#include <vcl/metaact.hxx>
+
+class SvStream;
+
+class VCL_DLLPUBLIC SvmWriter
+{
+private:
+    SvStream& mrStream;
+
+protected:
+    void WriteColor(::Color aColor);
+
+public:
+    SvmWriter(SvStream& rIStm);
+
+    SvStream& Write(GDIMetaFile& rMetaFile);
+    void MetaActionHandler(MetaAction* pAct, ImplMetaWriteData* pData);
+    void ActionHandler(MetaActionType nType);
+    void PixelHandler(MetaPixelAction* pAct);
+};
\ No newline at end of file
diff --git a/vcl/Library_vcl.mk b/vcl/Library_vcl.mk
index d3f1adcd9b37..483c51980fe8 100644
--- a/vcl/Library_vcl.mk
+++ b/vcl/Library_vcl.mk
@@ -455,6 +455,7 @@ $(eval $(call gb_Library_add_exception_objects,vcl,\
     vcl/source/filter/jpeg/JpegWriter \
     vcl/source/filter/jpeg/JpegTransform \
     vcl/source/filter/svm/SvmReader \
+    vcl/source/filter/svm/SvmWriter \
     vcl/source/filter/wmf/emfwr \
     vcl/source/filter/wmf/wmf \
     vcl/source/filter/wmf/wmfexternal \
diff --git a/vcl/qa/cppunit/svm/svmtest.cxx b/vcl/qa/cppunit/svm/svmtest.cxx
index 7a1f4b8f0dba..a32cbd44b6f2 100644
--- a/vcl/qa/cppunit/svm/svmtest.cxx
+++ b/vcl/qa/cppunit/svm/svmtest.cxx
@@ -23,6 +23,7 @@
 #include <tools/fract.hxx>
 #include <vcl/metaact.hxx>
 #include <vcl/filter/SvmReader.hxx>
+#include <vcl/filter/SvmWriter.hxx>
 #include <salhelper/simplereferenceobject.hxx>
 
 #include <bitmap/BitmapWriteAccess.hxx>
@@ -325,7 +326,8 @@ GDIMetaFile SvmTest::writeAndReadStream(GDIMetaFile& rMetaFile, std::u16string_v
         writeToFile(rMetaFile, rName);
 
     SvMemoryStream aStream;
-    rMetaFile.Write(aStream);
+    SvmWriter aWriter(aStream);
+    aWriter.Write(rMetaFile);
     aStream.Seek(STREAM_SEEK_TO_BEGIN);
 
     GDIMetaFile aResultMetafile;
diff --git a/vcl/source/filter/svm/SvmWriter.cxx b/vcl/source/filter/svm/SvmWriter.cxx
new file mode 100644
index 000000000000..b4c373a16946
--- /dev/null
+++ b/vcl/source/filter/svm/SvmWriter.cxx
@@ -0,0 +1,106 @@
+/* -*- 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 <vcl/filter/SvmWriter.hxx>
+#include <vcl/TypeSerializer.hxx>
+
+#include <tools/stream.hxx>
+#include <tools/vcompat.hxx>
+
+SvmWriter::SvmWriter(SvStream& rIStm)
+    : mrStream(rIStm)
+{
+}
+
+void SvmWriter::WriteColor(::Color aColor)
+{
+    mrStream.WriteUInt32(static_cast<sal_uInt32>(aColor));
+}
+
+SvStream& SvmWriter::Write(GDIMetaFile& rMetaFile)
+{
+    const SvStreamCompressFlags nStmCompressMode = mrStream.GetCompressMode();
+    SvStreamEndian nOldFormat = mrStream.GetEndian();
+
+    mrStream.SetEndian(SvStreamEndian::LITTLE);
+    mrStream.WriteBytes("VCLMTF", 6);
+
+    {
+        VersionCompatWrite aCompat(mrStream, 1);
+
+        mrStream.WriteUInt32(static_cast<sal_uInt32>(nStmCompressMode));
+        TypeSerializer aSerializer(mrStream);
+        aSerializer.writeMapMode(rMetaFile.GetPrefMapMode());
+        aSerializer.writeSize(rMetaFile.GetPrefSize());
+        mrStream.WriteUInt32(rMetaFile.GetActionSize());
+    } // VersionCompatWrite dtor writes stuff into the header
+
+    ImplMetaWriteData aWriteData;
+
+    aWriteData.meActualCharSet = mrStream.GetStreamCharSet();
+
+    MetaAction* pAct = rMetaFile.FirstAction();
+    while (pAct)
+    {
+        // pAct->Write( mrStream, &aWriteData );
+        MetaActionHandler(pAct, &aWriteData);
+        pAct = rMetaFile.NextAction();
+    }
+
+    mrStream.SetEndian(nOldFormat);
+
+    return mrStream;
+}
+
+void SvmWriter::MetaActionHandler(MetaAction* pAct, ImplMetaWriteData* pData)
+{
+    MetaActionType nType = static_cast<MetaActionType>(pAct->GetType());
+
+    switch (nType)
+    {
+        case MetaActionType::NONE:
+        {
+            ActionHandler(pAct->GetType());
+        }
+        break;
+        case MetaActionType::PIXEL:
+        {
+            auto* pMetaAction = static_cast<MetaPixelAction*>(pAct);
+            PixelHandler(pMetaAction);
+        }
+        break;
+        default:
+            pAct->Write(mrStream, pData);
+    }
+}
+
+void SvmWriter::ActionHandler(MetaActionType nType)
+{
+    mrStream.WriteUInt16(static_cast<sal_uInt16>(nType));
+}
+
+void SvmWriter::PixelHandler(MetaPixelAction* pAct)
+{
+    ActionHandler(pAct->GetType());
+    VersionCompatWrite aCompat(mrStream, 1);
+    TypeSerializer aSerializer(mrStream);
+    aSerializer.writePoint(pAct->GetPoint());
+    WriteColor(pAct->GetColor());
+}
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */