1 files changed, 164 insertions, 0 deletions
diff --git a/vcl/source/filter/GraphicNativeTransform.cxx b/vcl/source/filter/GraphicNativeTransform.cxx
new file mode 100644
index 000000000..792dd6a93
--- /dev/null
+++ b/vcl/source/filter/GraphicNativeTransform.cxx
@@ -0,0 +1,164 @@
+/* -*- 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/GraphicNativeTransform.hxx>
+
+#include <vcl/gfxlink.hxx>
+#include <vcl/graphicfilter.hxx>
+#include <com/sun/star/beans/PropertyValue.hpp>
+#include <com/sun/star/uno/Sequence.hxx>
+#include <tools/stream.hxx>
+#include <comphelper/propertyvalue.hxx>
+
+#include "jpeg/Exif.hxx"
+#include "jpeg/JpegTransform.hxx"
+
+GraphicNativeTransform::GraphicNativeTransform(Graphic& rGraphic)
+    : mrGraphic(rGraphic)
+{
+}
+
+void GraphicNativeTransform::rotate(Degree10 aInputRotation)
+{
+    // Rotation can be between 0 and 3600
+    Degree10 aRotation = aInputRotation % 3600_deg10;
+
+    if (aRotation == 0_deg10)
+    {
+        return; // No rotation is needed
+    }
+    else if (aRotation != 900_deg10 && aRotation != 1800_deg10 && aRotation != 2700_deg10)
+    {
+        return;
+    }
+
+    GfxLink aLink = mrGraphic.GetGfxLink();
+    if (aLink.GetType() == GfxLinkType::NativeJpg)
+    {
+        rotateJPEG(aRotation);
+    }
+    else if (aLink.GetType() == GfxLinkType::NativePng)
+    {
+        rotateGeneric(aRotation, u"png");
+    }
+    else if (aLink.GetType() == GfxLinkType::NativeGif)
+    {
+        rotateGeneric(aRotation, u"gif");
+    }
+    else if (aLink.GetType() == GfxLinkType::NONE)
+    {
+        rotateBitmapOnly(aRotation);
+    }
+}
+
+bool GraphicNativeTransform::rotateBitmapOnly(Degree10 aRotation)
+{
+    if (mrGraphic.IsAnimated())
+    {
+        return false;
+    }
+
+    BitmapEx aBitmap = mrGraphic.GetBitmapEx();
+    aBitmap.Rotate(aRotation, COL_BLACK);
+    mrGraphic = aBitmap;
+
+    return true;
+}
+
+bool GraphicNativeTransform::rotateGeneric(Degree10 aRotation, std::u16string_view aType)
+{
+    // Can't rotate animations yet
+    if (mrGraphic.IsAnimated())
+    {
+        return false;
+    }
+
+    SvMemoryStream aStream;
+
+    GraphicFilter& rFilter = GraphicFilter::GetGraphicFilter();
+
+    css::uno::Sequence<css::beans::PropertyValue> aFilterData{
+        comphelper::makePropertyValue("Interlaced", sal_Int32(0)),
+        comphelper::makePropertyValue("Compression", sal_Int32(9)),
+        comphelper::makePropertyValue("Quality", sal_Int32(90))
+    };
+
+    sal_uInt16 nFilterFormat = rFilter.GetExportFormatNumberForShortName(aType);
+
+    BitmapEx aBitmap = mrGraphic.GetBitmapEx();
+    aBitmap.Rotate(aRotation, COL_BLACK);
+    rFilter.ExportGraphic(aBitmap, u"none", aStream, nFilterFormat, &aFilterData);
+
+    aStream.Seek(STREAM_SEEK_TO_BEGIN);
+
+    Graphic aGraphic;
+    rFilter.ImportGraphic(aGraphic, u"import", aStream);
+
+    mrGraphic = aGraphic;
+    return true;
+}
+
+void GraphicNativeTransform::rotateJPEG(Degree10 aRotation)
+{
+    BitmapEx aBitmap = mrGraphic.GetBitmapEx();
+
+    if (aBitmap.GetSizePixel().Width() % 16 != 0 || aBitmap.GetSizePixel().Height() % 16 != 0)
+    {
+        rotateGeneric(aRotation, u"png");
+    }
+    else
+    {
+        GfxLink aLink = mrGraphic.GetGfxLink();
+
+        SvMemoryStream aSourceStream;
+        aSourceStream.WriteBytes(aLink.GetData(), aLink.GetDataSize());
+        aSourceStream.Seek(STREAM_SEEK_TO_BEGIN);
+
+        exif::Orientation aOrientation = exif::TOP_LEFT;
+
+        Exif exif;
+        if (exif.read(aSourceStream))
+        {
+            aOrientation = exif.getOrientation();
+        }
+
+        SvMemoryStream aTargetStream;
+        JpegTransform transform(aSourceStream, aTargetStream);
+        transform.setRotate(aRotation);
+        transform.perform();
+
+        aTargetStream.Seek(STREAM_SEEK_TO_BEGIN);
+
+        // Reset orientation in exif if needed
+        if (exif.hasExif() && aOrientation != exif::TOP_LEFT)
+        {
+            exif.setOrientation(exif::TOP_LEFT);
+            exif.write(aTargetStream);
+        }
+
+        aTargetStream.Seek(STREAM_SEEK_TO_BEGIN);
+
+        Graphic aGraphic;
+        GraphicFilter& rFilter = GraphicFilter::GetGraphicFilter();
+        rFilter.ImportGraphic(aGraphic, u"import", aTargetStream);
+        mrGraphic = aGraphic;
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */