1 files changed, 78 insertions, 0 deletions
diff --git a/libreofficekit/source/gtk/tilebuffer.hxx b/libreofficekit/source/gtk/tilebuffer.hxx
new file mode 100644
index 000000000000..a5ed0dc8ec61
--- /dev/null
+++ b/libreofficekit/source/gtk/tilebuffer.hxx
@@ -0,0 +1,78 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef INCLUDED_TILEBUFFER_HXX
+#define INCLUDED_TILEBUFFER_HXX
+
+#include <gdk/gdkkeysyms.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <vector>
+
+#define LOK_USE_UNSTABLE_API
+#include <LibreOfficeKit/LibreOfficeKit.h>
+#include <LibreOfficeKit/LibreOfficeKitEnums.h>
+#include <LibreOfficeKit/LibreOfficeKitGtk.h>
+
+/*
+  This class represents a single tile in the tile buffer.
+  TODO: Extend it to support features like double buffering
+*/
+class Tile
+{
+public:
+  Tile() : valid(0) {}
+  ~Tile() {
+    tile_release();
+  }
+
+  GdkPixbuf* tile_get_buffer();
+  void tile_release();
+  void tile_set_pixbuf(GdkPixbuf*);
+  bool valid;
+private:
+  GdkPixbuf *m_pBuffer;
+};
+
+/*
+  TileBuffer is the buffer caching all the recently rendered tiles.
+  The buffer is set to invalid when zoom factor changes.
+*/
+class TileBuffer
+{
+public:
+  TileBuffer(LibreOfficeKitDocument *document,
+             int tileSize,
+             int rows,
+             int columns)
+    : m_pLOKDocument(document)
+    , m_nTileSize(tileSize)
+    , m_fZoomFactor(1)
+    , m_nWidth(columns)
+    , m_nHeight(rows)
+  {
+    m_aTiles.resize(rows * columns);
+  }
+
+  ~TileBuffer() {}
+
+  void tile_buffer_set_zoom(float zoomFactor, int rows, int columns);
+  Tile& tile_buffer_get_tile(int x, int y);
+  void tile_buffer_update();
+  void tile_buffer_reset_all_tiles();
+private:
+  LibreOfficeKitDocument *m_pLOKDocument;
+  int m_nTileSize;
+  float m_fZoomFactor;
+  std::vector<Tile> m_aTiles;
+  //TODO: Also set width and height when document size changes
+  int m_nWidth;
+  int m_nHeight;
+};
+
+#endif // INCLUDED_TILEBUFFER_HXX