pdfium: Delay the swap out.

If we swap out too early, the constructor of GraphicObject forces a swap
in, so we'd render everything during the load anyway.

Change-Id: I0ea1a755242fd57ef28d082ce4bf534a32199f87
Reviewed-on: https://gerrit.libreoffice.org/56286
Reviewed-by: Ashod Nakashian <ashnakash@gmail.com>
Tested-by: Ashod Nakashian <ashnakash@gmail.com>

3 files changed, 28 insertions, 7 deletions

diff --git a/sd/source/filter/pdf/sdpdffilter.cxx b/sd/source/filter/pdf/sdpdffilter.cxx
index d78ccaa328b0..6f8b4ca2c0b3 100644
--- a/sd/source/filter/pdf/sdpdffilter.cxx
+++ b/sd/source/filter/pdf/sdpdffilter.cxx
@@ -115,15 +115,15 @@ bool SdPdfFilter::Import()
 
     for (std::pair<Graphic, Size>& aPair : aGraphics)
     {
-        const Graphic& aGraphic = aPair.first;
+        const Graphic& rGraphic = aPair.first;
         const Size& aSize = aPair.second;
 
-        const sal_Int32 nPageNumber = aGraphic.getPageNumber();
+        const sal_Int32 nPageNumber = rGraphic.getPageNumber();
         assert(nPageNumber >= 0 && nPageNumber < static_cast<sal_Int32>(aGraphics.size()));
 
         // Create the page and insert the Graphic.
         SdPage* pPage = mrDocument.GetSdPage(nPageNumber, PageKind::Standard);
-        Size aGrfSize(OutputDevice::LogicToLogic(aSize, aGraphic.GetPrefMapMode(),
+        Size aGrfSize(OutputDevice::LogicToLogic(aSize, rGraphic.GetPrefMapMode(),
                                                  MapMode(MapUnit::Map100thMM)));
 
         // Resize to original size based on 72 dpi to preserve page size.
@@ -134,7 +134,13 @@ bool SdPdfFilter::Import()
         pPage->SetSize(aGrfSize);
         Point aPos(0, 0);
 
-        pPage->InsertObject(new SdrGrafObj(aGraphic, tools::Rectangle(aPos, aGrfSize)));
+        SdrGrafObj* pSdrGrafObj = new SdrGrafObj(rGraphic, tools::Rectangle(aPos, aGrfSize));
+        pPage->InsertObject(pSdrGrafObj);
+
+        // we know that the initial bitmap we provided was just a placeholder,
+        // we need to swap it out, so that on the next swap in, we render the
+        // correct one
+        const_cast<GraphicObject&>(pSdrGrafObj->GetGraphicObject()).SwapOut();
     }
 
     return true;
diff --git a/svtools/source/graphic/grfcache.cxx b/svtools/source/graphic/grfcache.cxx
index 443cfa91aa90..0bb04b0c5d56 100644
--- a/svtools/source/graphic/grfcache.cxx
+++ b/svtools/source/graphic/grfcache.cxx
@@ -80,6 +80,16 @@ GraphicID::GraphicID( const GraphicObject& rObj )
                 mnID3 = basegfx::fround(rRange.getHeight());
                 mnID4 = vcl_get_checksum(0, rVectorGraphicDataPtr->getVectorGraphicDataArray().getConstArray(), rVectorGraphicDataPtr->getVectorGraphicDataArrayLength());
             }
+            else if (rGraphic.hasPdfData())
+            {
+                std::shared_ptr<css::uno::Sequence<sal_Int8>> pPdfData = rGraphic.getPdfData();
+                const BitmapEx& rBmpEx = rGraphic.GetBitmapEx();
+
+                mnID1 |= (rGraphic.getPageNumber() & 0x0fffffff);
+                mnID2 = rBmpEx.GetSizePixel().Width();
+                mnID3 = rBmpEx.GetSizePixel().Height();
+                mnID4 = vcl_get_checksum(0, pPdfData->getConstArray(), pPdfData->getLength());
+            }
             else if( rGraphic.IsAnimated() )
             {
                 const Animation aAnimation( rGraphic.GetAnimation() );
diff --git a/vcl/source/filter/ipdf/pdfread.cxx b/vcl/source/filter/ipdf/pdfread.cxx
index 3a058bb36b57..8240c4af3217 100644
--- a/vcl/source/filter/ipdf/pdfread.cxx
+++ b/vcl/source/filter/ipdf/pdfread.cxx
@@ -330,6 +330,9 @@ size_t ImportPDFUnloaded(const OUString& rURL, std::vector<std::pair<Graphic, Si
     if (nPageCount <= 0)
         return 0;
 
+    // dummy Bitmap
+    Bitmap aBitmap(Size(1, 1), 24);
+
     for (size_t nPageIndex = 0; nPageIndex < static_cast<size_t>(nPageCount); ++nPageIndex)
     {
         double fPageWidth = 0;
@@ -341,9 +344,11 @@ size_t ImportPDFUnloaded(const OUString& rURL, std::vector<std::pair<Graphic, Si
         const size_t nPageWidth = pointToPixel(fPageWidth, fResolutionDPI);
         const size_t nPageHeight = pointToPixel(fPageHeight, fResolutionDPI);
 
-        // Create the Graphic and link the original PDF stream.
-        Graphic aGraphic;
-        aGraphic.setPdfData(pPdfData); // TODO: Skip if unchanged.
+        // Create the Graphic with a dummy Bitmap and link the original PDF stream.
+        // We swap out this Graphic as soon as possible, and a later swap in
+        // actually renders the correct Bitmap on demand.
+        Graphic aGraphic(aBitmap);
+        aGraphic.setPdfData(pPdfData);
         aGraphic.setPageNumber(nPageIndex);
         aGraphic.SetSharedLink(pGfxLink);