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common/rfb/Cursor.h

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+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * Copyright 2014-2017 Pierre Ossman for Cendio AB
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+//
+// Cursor - structure containing information describing
+//          the current cursor shape
+//
+
+#ifndef __RFB_CURSOR_H__
+#define __RFB_CURSOR_H__
+
+#include <rfb/PixelBuffer.h>
+
+namespace rfb {
+
+  class Cursor {
+  public:
+    Cursor(int width, int height, const Point& hotspot, const rdr::U8* data);
+    Cursor(const Cursor& other);
+    ~Cursor();
+
+    int width() const { return width_; };
+    int height() const { return height_; };
+    const Point& hotspot() const { return hotspot_; };
+    const rdr::U8* getBuffer() const { return data; };
+
+    // getBitmap() returns a monochrome version of the cursor
+    rdr::U8* getBitmap() const;
+    // getMask() returns a simple mask version of the alpha channel
+    rdr::U8* getMask() const;
+
+    // crop() crops the cursor down to the smallest possible size, based on the
+    // mask.
+    void crop();
+
+  protected:
+    int width_, height_;
+    Point hotspot_;
+    rdr::U8* data;
+  };
+
+  class RenderedCursor : public PixelBuffer {
+  public:
+    RenderedCursor();
+
+    Rect getEffectiveRect() const { return buffer.getRect(offset); }
+
+    virtual const rdr::U8* getBuffer(const Rect& r, int* stride) const;
+
+    void update(PixelBuffer* framebuffer, Cursor* cursor, const Point& pos);
+
+  protected:
+    ManagedPixelBuffer buffer;
+    Point offset;
+  };
+
+}
+#endif