Add tiled rendering via liblibreoffice.

We still need to add functions for getting dimensions of documents
etc. for this to be truly useful, this is also only usable for writer
documents for now.

Change-Id: I07812c9b72caca71dfd509705af48c1d355cb2f8

1 files changed, 76 insertions, 0 deletions

diff --git a/desktop/source/lib/init.cxx b/desktop/source/lib/init.cxx
index 710b4741bca6..5580a038a375 100644
--- a/desktop/source/lib/init.cxx
+++ b/desktop/source/lib/init.cxx
@@ -16,6 +16,7 @@
 #include <boost/shared_ptr.hpp>
 #include <boost/weak_ptr.hpp>
 
+#define LOK_USE_UNSTABLE_API
 #include <LibreOfficeKit/LibreOfficeKit.h>
 
 #include <tools/errinf.hxx>
@@ -39,10 +40,19 @@
 #include <vcl/svapp.hxx>
 #include <tools/resmgr.hxx>
 #include <vcl/graphicfilter.hxx>
+#include <vcl/sysdata.hxx>
+#include <vcl/virdev.hxx>
 #include <unotools/syslocaleoptions.hxx>
 #include <unotools/mediadescriptor.hxx>
 #include <osl/module.hxx>
 
+// Dirty hack -- we go directly into sw -- ideally we need some sort of
+// layer to get the writer shell for tiled rendering
+#include <doc.hxx>
+#include <docsh.hxx>
+#include <unotxdoc.hxx>
+#include <viewsh.hxx>
+
 using namespace css;
 using namespace utl;
 
@@ -154,6 +164,13 @@ extern "C"
 
 static void doc_destroy(LibreOfficeKitDocument* pThis);
 static int  doc_saveAs(LibreOfficeKitDocument* pThis, const char* pUrl, const char* pFormat, const char* pFilterOptions);
+static LibreOfficeKitDocumentType doc_getDocumentType(LibreOfficeKitDocument* pThis);
+static int doc_getNumberOfParts(LibreOfficeKitDocument* pThis);
+static void doc_setPart(LibreOfficeKitDocument* pThis, int nPart);
+static void doc_paintTile(LibreOfficeKitDocument* pThis, void* pCanvas,
+                          const int nCanvasWidth, const int nCanvasHeight,
+                          const int nTilePosX, const int nTilePosY,
+                          const int nTileWidth, const int nTileHeight);
 
 struct LibLODocument_Impl : public _LibreOfficeKitDocument
 {
@@ -171,6 +188,10 @@ struct LibLODocument_Impl : public _LibreOfficeKitDocument
 
             m_pDocumentClass->destroy = doc_destroy;
             m_pDocumentClass->saveAs = doc_saveAs;
+            m_pDocumentClass->getDocumentType = doc_getDocumentType;
+            m_pDocumentClass->getNumberOfParts = doc_getNumberOfParts;
+            m_pDocumentClass->setPart = doc_setPart;
+            m_pDocumentClass->paintTile = doc_paintTile;
 
             gDocumentClass = m_pDocumentClass;
         }
@@ -338,6 +359,61 @@ static int doc_saveAs(LibreOfficeKitDocument* pThis, const char* sUrl, const cha
     return false;
 }
 
+static LibreOfficeKitDocumentType doc_getDocumentType (LibreOfficeKitDocument* pThis)
+{
+    (void) pThis;
+    return WRITER;
+}
+
+static int doc_getNumberOfParts (LibreOfficeKitDocument* pThis)
+{
+    (void) pThis;
+    // Assume writer document for now.
+    return 1;
+}
+
+static void doc_setPart(LibreOfficeKitDocument* pThis, int nPart)
+{
+    (void) pThis;
+    (void) nPart;
+}
+
+static void doc_paintTile (LibreOfficeKitDocument* pThis, void* pCanvas,
+                           const int nCanvasWidth, const int nCanvasHeight,
+                           const int nTilePosX, const int nTilePosY,
+                           const int nTileWidth, const int nTileHeight)
+{
+    LibLODocument_Impl* pDocument = static_cast<LibLODocument_Impl*>(pThis);
+
+    // We can't use this on anything but Linux for now, so the following is
+    // likely unusable for now.
+    SystemGraphicsData aSystemGraphicsData;
+#if defined( WNT )
+    aSystemGraphicsData.hDC = *static_cast< HDC* >(pCanvas);
+#elif defined( MACOSX )
+    aSystemGraphicsData.rCGContext = *static_cast< CGContextRef* >(pCanvas);
+#elif defined( ANDROID )
+    assert(false); // We can't use tiled rendering on Android in any case yet...
+#elif defined( IOS )
+    aSystemGraphicsData.rCGContext = *static_cast< CGContextRef* >(pCanvas);
+#elif defined( UNX )
+    aSystemGraphicsData = *static_cast< SystemGraphicsData*> (pCanvas);
+#endif
+
+    Application::AcquireSolarMutex(1);
+    {
+        SwXTextDocument* pTxtDoc = dynamic_cast< SwXTextDocument* >( pDocument->mxComponent.get() );
+        SwDocShell* pDocShell = pTxtDoc->GetDocShell();
+        SwDoc* pDoc = pDocShell->GetDoc();
+        SwViewShell* pViewShell = pDoc->GetCurrentViewShell();
+
+        VirtualDevice aDevice(&aSystemGraphicsData, (sal_uInt16)0);
+        pViewShell->PaintTile(aDevice, nCanvasWidth, nCanvasHeight,
+                                nTilePosX, nTilePosY, nTileWidth, nTileHeight);
+    }
+    Application::ReleaseSolarMutex();
+}
+
 static char* lo_getError (LibreOfficeKit *pThis)
 {
     LibLibreOffice_Impl* pLib = static_cast<LibLibreOffice_Impl*>(pThis);