Use external buffer for LibLO tiled rendering.

Means we can get rid of hackily storing a reference to the last
buffer we created.

Change-Id: I8092a7d87bc391301f75651a59b37fbd73ac64fd

2 files changed, 6 insertions, 3 deletions

diff --git a/include/LibreOfficeKit/LibreOfficeKit.h b/include/LibreOfficeKit/LibreOfficeKit.h
index f63f3a71ac91..db9aff2519a3 100644
--- a/include/LibreOfficeKit/LibreOfficeKit.h
+++ b/include/LibreOfficeKit/LibreOfficeKit.h
@@ -90,7 +90,8 @@ struct _LibreOfficeKitDocumentClass
   // for its internal buffer, i.e. the rowstride for the buffer may be larger
   // than the desired width, hence we need to be able to return the
   // rowstride too.
-  unsigned char* (*paintTile) (LibreOfficeKitDocument* pThis,
+  void (*paintTile)       (LibreOfficeKitDocument* pThis,
+                           unsigned char* pBuffer,
                            const int nCanvasWidth,
                            const int nCanvasHeight,
                            int* pRowStride,
diff --git a/include/LibreOfficeKit/LibreOfficeKit.hxx b/include/LibreOfficeKit/LibreOfficeKit.hxx
index ee310fec0f0e..427ea833c5a9 100644
--- a/include/LibreOfficeKit/LibreOfficeKit.hxx
+++ b/include/LibreOfficeKit/LibreOfficeKit.hxx
@@ -59,7 +59,9 @@ public:
         mpDoc->pClass->setPart(mpDoc, nPart);
     }
 
-    inline unsigned char* paintTile(const int nCanvasWidth,
+    inline void paintTile(
+                          unsigned char* pBuffer,
+                          const int nCanvasWidth,
                           const int nCanvasHeight,
                           int* pRowStride,
                           const int nTilePosX,
@@ -67,7 +69,7 @@ public:
                           const int nTileWidth,
                           const int nTileHeight)
     {
-        return mpDoc->pClass->paintTile(mpDoc, nCanvasWidth, nCanvasHeight, pRowStride,
+        return mpDoc->pClass->paintTile(mpDoc, pBuffer, nCanvasWidth, nCanvasHeight, pRowStride,
                                 nTilePosX, nTilePosY, nTileWidth, nTileHeight);
     }