sd: slideshow render interface and implementation

Interface and implementation to expose the ability to render
the slide's layers to a bitmap.

Change-Id: I3da48585e498354592e163d84bd29659b233c255
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/170214
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

5 files changed, 119 insertions, 1 deletions

diff --git a/sd/source/ui/inc/DrawViewShell.hxx b/sd/source/ui/inc/DrawViewShell.hxx
index f6da30194224..ce1e7c74cea3 100644
--- a/sd/source/ui/inc/DrawViewShell.hxx
+++ b/sd/source/ui/inc/DrawViewShell.hxx
@@ -33,6 +33,7 @@
 namespace svx::sidebar { class SelectionChangeHandler; }
 namespace com::sun::star::lang { class XEventListener; }
 namespace com::sun::star::scanner { class XScannerManager2; }
+namespace com::sun::star::presentation { class XSlideShow; }
 
 class Outliner;
 class SdPage;
@@ -383,6 +384,10 @@ public:
     const SdViewOptions& GetViewOptions() const { return maViewOptions; }
     //move this method to ViewShell.
     //void  NotifyAccUpdate();
+
+    css::uno::Reference<css::presentation::XSlideShow> getXSlideShowInstance();
+    void destroyXSlideShowInstance();
+
 protected:
                     DECL_DLLPRIVATE_LINK( ClipboardChanged, TransferableDataHelper*, void );
                     DECL_DLLPRIVATE_LINK( TabSplitHdl, TabBar *, void );
@@ -502,6 +507,8 @@ private:
     std::unique_ptr<ViewOverlayManager> mpViewOverlayManager;
     std::vector<std::unique_ptr<SdrExternalToolEdit>> m_ExternalEdits;
     SdViewOptions maViewOptions;
+
+    css::uno::Reference<com::sun::star::presentation::XSlideShow> mxSlideShow;
 };
 
     /// Merge the background properties together and deposit the result in rMergeAttr
diff --git a/sd/source/ui/inc/unomodel.hxx b/sd/source/ui/inc/unomodel.hxx
index 28bd323dd8d4..3b5532759cc4 100644
--- a/sd/source/ui/inc/unomodel.hxx
+++ b/sd/source/ui/inc/unomodel.hxx
@@ -283,12 +283,19 @@ public:
     }
     /// @see vcl::ITiledRenderable::setPaintTextEdit().
     virtual void setPaintTextEdit(bool bPaint) override { mbPaintTextEdit = bPaint; }
-
     /// @see vcl::ITiledRenderable::getViewRenderState().
     SD_DLLPUBLIC OString getViewRenderState(SfxViewShell* pViewShell = nullptr) override;
 
     /// @see vcl::ITiledRenderable::getPresentationInfo().
     OString getPresentationInfo() const override;
+    /// @see vcl::ITiledRenderable::createSlideRenderer().
+    bool createSlideRenderer(
+        sal_Int32 nSlideNumber, sal_Int32& nViewWidth, sal_Int32& nViewHeight,
+        bool bRenderBackground, bool bRenderMasterPage) override;
+    /// @see vcl::ITiledRenderable::postSlideshowCleanup().
+    void postSlideshowCleanup() override;
+    /// @see vcl::ITiledRenderable::renderNextSlideLayer().
+    bool renderNextSlideLayer(unsigned char* pBuffer, bool& bIsBitmapLayer, OUString& rJsonMsg) override;
 
     // XComponent
 
diff --git a/sd/source/ui/unoidl/unomodel.cxx b/sd/source/ui/unoidl/unomodel.cxx
index 4241a7537a25..e46884e1c88a 100644
--- a/sd/source/ui/unoidl/unomodel.cxx
+++ b/sd/source/ui/unoidl/unomodel.cxx
@@ -80,6 +80,7 @@
 #include <editeng/eeitem.hxx>
 #include <unotools/datetime.hxx>
 #include <xmloff/autolayout.hxx>
+#include <tools/helpers.hxx>
 #include <tools/json_writer.hxx>
 #include <tools/helpers.hxx>
 
@@ -3090,6 +3091,65 @@ OString SdXImpressDocument::getPresentationInfo() const
     return aJsonWriter.finishAndGetAsOString();
 }
 
+bool SdXImpressDocument::createSlideRenderer(
+    sal_Int32 nSlideNumber, sal_Int32& nViewWidth, sal_Int32& nViewHeight,
+    bool bRenderBackground, bool bRenderMasterPage)
+{
+    DrawViewShell* pViewSh = GetViewShell();
+    if (!pViewSh)
+        return false;
+
+    uno::Reference<presentation::XSlideShow> xSlideShow = pViewSh->getXSlideShowInstance();
+    if (!xSlideShow.is())
+        return false;
+
+    bool bSuccess = false;
+    try
+    {
+        uno::Reference<drawing::XDrawPagesSupplier> xDrawPages(mpDoc->getUnoModel(), uno::UNO_QUERY_THROW);
+        uno::Reference<container::XIndexAccess> xSlides(xDrawPages->getDrawPages(), uno::UNO_QUERY_THROW);
+        uno::Reference<drawing::XDrawPage> xSlide(xSlides->getByIndex(nSlideNumber), uno::UNO_QUERY_THROW);
+        uno::Reference<animations::XAnimationNodeSupplier> xAnimNodeSupplier(xSlide, uno::UNO_QUERY_THROW);
+        uno::Reference<animations::XAnimationNode> xAnimNode = xAnimNodeSupplier->getAnimationNode();
+
+        bSuccess = xSlideShow->createLOKSlideRenderer(nViewWidth, nViewHeight,
+                                                 bRenderMasterPage, bRenderBackground,
+                                                 xSlide, xDrawPages, xAnimNode);
+    }
+    catch (uno::Exception&)
+    {
+        TOOLS_WARN_EXCEPTION( "sd", "SdXImpressDocument::createLOKSlideRenderer: failed" );
+    }
+    return bSuccess;
+}
+
+void SdXImpressDocument::postSlideshowCleanup()
+{
+    DrawViewShell* pViewSh = GetViewShell();
+    if (!pViewSh)
+        return;
+
+    pViewSh->destroyXSlideShowInstance();
+}
+
+bool SdXImpressDocument::renderNextSlideLayer(unsigned char* pBuffer, bool& bIsBitmapLayer, OUString& rJsonMsg)
+{
+    DrawViewShell* pViewSh = GetViewShell();
+    if (!pViewSh)
+        return true;
+
+    uno::Reference<presentation::XSlideShow> xSlideShow = pViewSh->getXSlideShowInstance();
+    if (!xSlideShow.is())
+        return true;
+
+    auto nBufferPointer = sal::static_int_cast<sal_Int64>(reinterpret_cast<sal_IntPtr>(pBuffer));
+    sal_Bool bBitmapLayer = false;
+    bool bDone = xSlideShow->renderNextLOKSlideLayer(nBufferPointer, bBitmapLayer, rJsonMsg);
+    bIsBitmapLayer = bBitmapLayer;
+
+    return bDone;
+}
+
 SdrModel& SdXImpressDocument::getSdrModelFromUnoModel() const
 {
     OSL_ENSURE(GetDoc(), "No SdrModel in draw/Impress, should not happen");
diff --git a/sd/source/ui/view/drviewsa.cxx b/sd/source/ui/view/drviewsa.cxx
index a3587ab7490b..f057488e591d 100644
--- a/sd/source/ui/view/drviewsa.cxx
+++ b/sd/source/ui/view/drviewsa.cxx
@@ -160,6 +160,8 @@ DrawViewShell::~DrawViewShell()
 
 void DrawViewShell::ImplDestroy()
 {
+    destroyXSlideShowInstance();
+
     SD_MOD()->GetColorConfig().RemoveListener(this);
 
     mpSelectionChangeHandler->Disconnect();
diff --git a/sd/source/ui/view/drviewsk.cxx b/sd/source/ui/view/drviewsk.cxx
index bdbb821e96b3..cb40d8398f04 100644
--- a/sd/source/ui/view/drviewsk.cxx
+++ b/sd/source/ui/view/drviewsk.cxx
@@ -11,12 +11,18 @@
 #include <ViewShellBase.hxx>
 #include <sdmod.hxx>
 
+#include <com/sun/star/presentation/SlideShow.hpp>
+
 #include <comphelper/lok.hxx>
+#include <comphelper/diagnose_ex.hxx>
+#include <comphelper/processfactory.hxx>
 #include <comphelper/servicehelper.hxx>
 #include <sfx2/lokhelper.hxx>
 #include <LibreOfficeKit/LibreOfficeKitEnums.h>
 #include <unomodel.hxx>
 
+using namespace css;
+
 namespace sd {
 
 void DrawViewShell::ConfigurationChanged( utl::ConfigurationBroadcaster* pCb, ConfigurationHints )
@@ -57,6 +63,42 @@ void DrawViewShell::ConfigureAppBackgroundColor( svtools::ColorConfig *pColorCon
     maViewOptions.mnAppBackgroundColor = aFillColor;
 }
 
+void DrawViewShell::destroyXSlideShowInstance()
+{
+    if (!mxSlideShow.is())
+        return;
+
+    try
+    {
+        uno::Reference<lang::XComponent> xComponent(mxSlideShow, uno::UNO_QUERY);
+        if (xComponent.is())
+            xComponent->dispose();
+    }
+    catch (uno::Exception&)
+    {
+        TOOLS_WARN_EXCEPTION( "sd", "DrawViewShell::destroyXSlideShowInstance dispose");
+    }
+
+    mxSlideShow.clear();
+}
+
+uno::Reference<presentation::XSlideShow> DrawViewShell::getXSlideShowInstance()
+{
+    if (!mxSlideShow.is())
+    {
+        try
+        {
+            auto xContext = ::comphelper::getProcessComponentContext();
+            mxSlideShow.set(presentation::SlideShow::create(xContext), uno::UNO_SET_THROW);
+        }
+        catch (uno::Exception&)
+        {
+            TOOLS_WARN_EXCEPTION("sd", "DrawViewShell::createXSlideShowInstance()");
+        }
+    }
+    return mxSlideShow;
+}
+
 }
 
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