[Libreoffice-commits] core.git: vcl/source

[Tomaž Vajngerl]

 vcl/source/filter/GraphicNativeTransform.cxx |   65 ++++++++++++++-------------
 1 file changed, 35 insertions(+), 30 deletions(-)

New commits:
commit 698315531414b223b35d8507fdf2f56dbcf6bc4c
Author: Tomaž Vajngerl <quikee at gmail.com>
Date:   Sun Jul 28 15:52:14 2013 +0200

    fdo#66006 Convert to PNG for JPEG that can't be losslessly rotated
    
    If a JPEG image has a width or height which is not a multiple of 16
    (width/heigh % 16 != 0) then it can't be completelly lossleessly
    rotated (the last uncomplete MCUs can't be rotated) and the image
    is cropped on the lower size. To prevent this such JPEG images
    must be rotated to PNG to prevent loss. Afterwards image can still
    be compressed with "Compress Graphic Dialog".
    
    Change-Id: Ie2803512a93bba55573bf66c547f132f37cba711

diff --git a/vcl/source/filter/GraphicNativeTransform.cxx b/vcl/source/filter/GraphicNativeTransform.cxx
index 261ad90..69a10bd 100644
--- a/vcl/source/filter/GraphicNativeTransform.cxx
+++ b/vcl/source/filter/GraphicNativeTransform.cxx
@@ -141,45 +141,50 @@ bool GraphicNativeTransform::rotateGeneric(sal_uInt16 aRotation, OUString aType)
 
 bool GraphicNativeTransform::rotateJPEG(sal_uInt16 aRotation)
 {
-    GfxLink aLink = mrGraphic.GetLink();
-
-    SvMemoryStream aSourceStream;
-    aSourceStream.Write(aLink.GetData(), aLink.GetDataSize());
-    aSourceStream.Seek( STREAM_SEEK_TO_BEGIN );
-
-    Orientation aOrientation = TOP_LEFT;
+    BitmapEx aBitmap = mrGraphic.GetBitmapEx();
 
-    Exif exif;
-    if ( exif.read(aSourceStream) )
+    if (aBitmap.GetSizePixel().Width()  % 16 != 0 ||
+        aBitmap.GetSizePixel().Height() % 16 != 0 )
     {
-        aOrientation = exif.getOrientation();
+        rotateGeneric(aRotation, OUString("png"));
     }
+    else
+    {
+        GfxLink aLink = mrGraphic.GetLink();
 
-    SvMemoryStream aTargetStream;
-    JpegTransform tranform(aSourceStream, aTargetStream);
-    tranform.setRotate(aRotation);
-    tranform.perform();
+        SvMemoryStream aSourceStream;
+        aSourceStream.Write(aLink.GetData(), aLink.GetDataSize());
+        aSourceStream.Seek( STREAM_SEEK_TO_BEGIN );
 
-    aTargetStream.Seek( STREAM_SEEK_TO_BEGIN );
+        Orientation aOrientation = TOP_LEFT;
 
-    // Reset orientation in exif if needed
-    if ( exif.hasExif() && aOrientation != TOP_LEFT)
-    {
-        exif.setOrientation(TOP_LEFT);
-        exif.write(aTargetStream);
-    }
+        Exif exif;
+        if ( exif.read(aSourceStream) )
+        {
+            aOrientation = exif.getOrientation();
+        }
 
-    aTargetStream.Seek( STREAM_SEEK_TO_END );
-    sal_uInt32 aBufferSize = aTargetStream.Tell();
-    sal_uInt8* pBuffer = new sal_uInt8[ aBufferSize ];
+        SvMemoryStream aTargetStream;
+        JpegTransform tranform(aSourceStream, aTargetStream);
+        tranform.setRotate(aRotation);
+        tranform.perform();
 
-    aTargetStream.Seek( STREAM_SEEK_TO_BEGIN );
-    aTargetStream.Read( pBuffer, aBufferSize );
+        aTargetStream.Seek( STREAM_SEEK_TO_BEGIN );
 
-    BitmapEx aBitmap = mrGraphic.GetBitmapEx();
-    aBitmap.Rotate(aRotation, COL_BLACK);
-    mrGraphic = aBitmap;
-    mrGraphic.SetLink( GfxLink( pBuffer, aBufferSize, aLink.GetType(), sal_True ) );
+        // Reset orientation in exif if needed
+        if ( exif.hasExif() && aOrientation != TOP_LEFT)
+        {
+            exif.setOrientation(TOP_LEFT);
+            exif.write(aTargetStream);
+        }
+
+        aTargetStream.Seek( STREAM_SEEK_TO_BEGIN );
+
+        Graphic aGraphic;
+        GraphicFilter& rFilter = GraphicFilter::GetGraphicFilter();
+        rFilter.ImportGraphic( aGraphic, OUString("import"), aTargetStream );
+        mrGraphic = aGraphic;
+    }
 
     return true;
 }