Use smart pointers for gdi pdf functions

Change-Id: Ia78adfbd0d07449e12a7e0d02acf8a1a1108437c
Reviewed-on: https://gerrit.libreoffice.org/31421Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Stahl <mstahl@redhat.com>

vcl/source/gdi/pdfwriter_impl.cxx

@@ -39,6 +39,7 @@
 #include <cppuhelper/implbase.hxx>
 #include <i18nlangtag/languagetag.hxx>
 #include <o3tl/numeric.hxx>
+#include <o3tl/make_unique.hxx>
 #include <osl/file.hxx>
 #include <osl/thread.h>
 #include <rtl/crc.h>
@@ -1722,8 +1723,6 @@ void PDFWriterImpl::PDFPage::appendWaveLine( sal_Int32 nWidth, sal_Int32 nY, sal
         m_aContext(rContext),
         m_aFile(m_aContext.URL),
         m_bOpen(false),
-        m_pCodec( nullptr ),
-        m_pMemStream(nullptr),
         m_aDocDigest( rtl_digest_createMD5() ),
         m_aCipher( nullptr ),
         m_aDigest( nullptr ),
@@ -2139,8 +2138,8 @@ void PDFWriterImpl::beginCompression()
 {
     if (!g_bDebugDisableCompression)
     {
-        m_pCodec = new ZCodec( 0x4000, 0x4000 );
-        m_pMemStream = new SvMemoryStream();
+        m_pCodec = o3tl::make_unique<ZCodec>( 0x4000, 0x4000 );
+        m_pMemStream = o3tl::make_unique<SvMemoryStream>();
         m_pCodec->BeginCompression();
     }
 }
@@ -2150,13 +2149,11 @@ void PDFWriterImpl::endCompression()
     if (!g_bDebugDisableCompression && m_pCodec)
     {
         m_pCodec->EndCompression();
-        delete m_pCodec;
-        m_pCodec = nullptr;
+        m_pCodec.reset();
         sal_uInt64 nLen = m_pMemStream->Tell();
         m_pMemStream->Seek( 0 );
         writeBuffer( m_pMemStream->GetData(), nLen );
-        delete m_pMemStream;
-        m_pMemStream = nullptr;
+        m_pMemStream.reset();
     }
 }
 

vcl/source/gdi/pdfwriter_impl.hxx

@@ -713,8 +713,8 @@ private:
     std::list< GraphicsState >              m_aGraphicsStack;
     GraphicsState                           m_aCurrentPDFState;
 
-    ZCodec*                                 m_pCodec;
-    SvMemoryStream*                         m_pMemStream;
+    std::unique_ptr<ZCodec>                 m_pCodec;
+    std::unique_ptr<SvMemoryStream>         m_pMemStream;
 
     std::vector< PDFAddStream >             m_aAdditionalStreams;
     std::set< PDFWriter::ErrorCode >        m_aErrors;

vcl/source/gdi/pngread.cxx

@@ -28,6 +28,7 @@
 #include <vcl/svapp.hxx>
 #include <vcl/alpha.hxx>
 #include <osl/endian.h>
+#include <o3tl/make_unique.hxx>
 
 namespace vcl
 {
@@ -74,11 +75,12 @@ private:
     std::vector<vcl::PNGReader::ChunkData>::iterator maChunkIter;
     std::vector<sal_uInt8>::iterator maDataIter;
 
-    Bitmap*             mpBmp;
-    BitmapWriteAccess*  mpAcc;
-    Bitmap*             mpMaskBmp;
-    AlphaMask*          mpAlphaMask;
-    BitmapWriteAccess*  mpMaskAcc;
+    std::unique_ptr<Bitmap>    mpBmp;
+    BitmapWriteAccess*         mpAcc;
+    std::unique_ptr<Bitmap>    mpMaskBmp;
+    std::unique_ptr<AlphaMask> mpAlphaMask;
+    BitmapWriteAccess*         mpMaskAcc;
+
     ZCodec              mpZCodec;
     sal_uInt8*          mpInflateInBuf; // as big as the size of a scanline + alphachannel + 1
     sal_uInt8*          mpScanPrior;    // pointer to the latest scanline
@@ -165,10 +167,7 @@ public:
 
 PNGReaderImpl::PNGReaderImpl( SvStream& rPNGStream )
 :   mrPNGStream( rPNGStream ),
-    mpBmp           ( nullptr ),
     mpAcc           ( nullptr ),
-    mpMaskBmp       ( nullptr ),
-    mpAlphaMask     ( nullptr ),
     mpMaskAcc       ( nullptr ),
     mpInflateInBuf  ( nullptr ),
     mpScanPrior     ( nullptr ),
@@ -246,9 +245,6 @@ PNGReaderImpl::~PNGReaderImpl()
     if( mpColorTable != mpDefaultColorTable )
         delete[] mpColorTable;
 
-    delete mpBmp;
-    delete mpAlphaMask;
-    delete mpMaskBmp;
     delete[] mpTransTab;
     delete[] mpInflateInBuf;
     delete[] mpScanPrior;
@@ -665,14 +661,14 @@ bool PNGReaderImpl::ImplReadHeader( const Size& rPreviewSizeHint )
     if ( !mpInflateInBuf || !mpScanPrior )
         return false;
 
-    mpBmp = new Bitmap( maTargetSize, mnTargetDepth );
+    mpBmp = o3tl::make_unique<Bitmap>( maTargetSize, mnTargetDepth );
     mpAcc = mpBmp->AcquireWriteAccess();
     if( !mpAcc )
         return false;
 
     if ( mbAlphaChannel )
     {
-        mpAlphaMask = new AlphaMask( maTargetSize );
+        mpAlphaMask = o3tl::make_unique<AlphaMask>( maTargetSize );
         mpAlphaMask->Erase( 128 );
         mpMaskAcc = mpAlphaMask->AcquireWriteAccess();
         if( !mpMaskAcc )
@@ -789,12 +785,12 @@ bool PNGReaderImpl::ImplReadTransparent()
     {
         if( bNeedAlpha)
         {
-            mpAlphaMask = new AlphaMask( maTargetSize );
+            mpAlphaMask = o3tl::make_unique<AlphaMask>( maTargetSize );
             mpMaskAcc = mpAlphaMask->AcquireWriteAccess();
         }
         else
         {
-            mpMaskBmp = new Bitmap( maTargetSize, 1 );
+            mpMaskBmp = o3tl::make_unique<Bitmap>( maTargetSize, 1 );
             mpMaskAcc = mpMaskBmp->AcquireWriteAccess();
         }
         mbTransparent = (mpMaskAcc != nullptr);