Add rowstride to tiled rendering via LibLO.

The buffer width could be larger than the desired rendering
width, hence we need to give the client access to the rowstride.

Change-Id: Ic63c1f455c89960164e076ed2528d43e64e81a40

2 files changed, 7 insertions, 1 deletions

diff --git a/include/LibreOfficeKit/LibreOfficeKit.h b/include/LibreOfficeKit/LibreOfficeKit.h
index b893067d0a67..cf2bcb2a757e 100644
--- a/include/LibreOfficeKit/LibreOfficeKit.h
+++ b/include/LibreOfficeKit/LibreOfficeKit.h
@@ -86,9 +86,14 @@ struct _LibreOfficeKitDocumentClass
                            int nPart);
 
   // Get a pointer to a raw array, of size 3*nCanvasWidth*nCanvasHeight
+  // Basebmp's bitmap device seems to round the width up if needed
+  // 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,
                            const int nCanvasWidth,
                            const int nCanvasHeight,
+                           int* pRowStride,
                            const int nTilePosX,
                            const int nTilePosY,
                            const int nTileWidth,
diff --git a/include/LibreOfficeKit/LibreOfficeKit.hxx b/include/LibreOfficeKit/LibreOfficeKit.hxx
index 6fd2512bd477..09b4ae61b28f 100644
--- a/include/LibreOfficeKit/LibreOfficeKit.hxx
+++ b/include/LibreOfficeKit/LibreOfficeKit.hxx
@@ -61,12 +61,13 @@ public:
 
     inline unsigned char* paintTile(const int nCanvasWidth,
                           const int nCanvasHeight,
+                          int* pRowStride,
                           const int nTilePosX,
                           const int nTilePosY,
                           const int nTileWidth,
                           const int nTileHeight)
     {
-        return mpDoc->pClass->paintTile(mpDoc, nCanvasWidth, nCanvasHeight,
+        return mpDoc->pClass->paintTile(mpDoc, nCanvasWidth, nCanvasHeight, pRowStride,
                                 nTilePosX, nTilePosY, nTileWidth, nTileHeight);
     }
 #endif // LOK_USE_UNSTABLE_API