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+/*
+ * Copyright (c) 2011 ARM Limited
+ * All rights reserved
+ *
+ * The license below extends only to copyright in the software and shall
+ * not be construed as granting a license to any other intellectual
+ * property including but not limited to intellectual property relating
+ * to a hardware implementation of the functionality of the software
+ * licensed hereunder.  You may use the software subject to the license
+ * terms below provided that you ensure that this notice is replicated
+ * unmodified and in its entirety in all distributions of the software,
+ * modified or unmodified, in source code or in binary form.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Ali Saidi
+ */
+
+/** @file
+ * This file provides conversion functions for a variety of video modes
+ */
+
+#ifndef __BASE_VNC_CONVERT_HH__
+#define __BASE_VNC_CONVERT_HH__
+
+#include "base/bitunion.hh"
+
+class VideoConvert
+{
+  public:
+    enum Mode {
+        UnknownMode,
+        bgr565,
+        rgb565,
+        bgr8888,
+        rgb8888,
+        rgb888,
+        bgr888,
+        bgr444,
+        bgr4444,
+        rgb444,
+        rgb4444,
+    };
+
+    // supports bpp32 RGB (bmp) and bpp16 5:6:5 mode BGR (linux)
+    BitUnion32(Rgb8888)
+        Bitfield<7,0> blue;
+        Bitfield<15,8> green;
+        Bitfield<23,16> red;
+        Bitfield<31,24> alpha;
+    EndBitUnion(Rgb8888)
+
+    BitUnion32(Bgr8888)
+        Bitfield<7,0> red;
+        Bitfield<15,8> green;
+        Bitfield<23,16> blue;
+        Bitfield<31,24> alpha;
+    EndBitUnion(Bgr8888)
+
+    BitUnion16(Bgr565)
+        Bitfield<4,0> red;
+        Bitfield<10,5> green;
+        Bitfield<15,11> blue;
+    EndBitUnion(Bgr565)
+
+    BitUnion16(Rgb565)
+        Bitfield<4,0> red;
+        Bitfield<10,5> green;
+        Bitfield<15,11> blue;
+    EndBitUnion(Rgb565)
+
+    /** Setup the converter with the given parameters
+     * @param input_mode type of data that will be provided
+     * @param output_mode type of data that should be output
+     * @param _width width of the frame buffer
+     * @param _height height of the frame buffer
+     */
+    VideoConvert(Mode input_mode, Mode output_mode, int _width, int _height);
+
+    /** Destructor
+     */
+    ~VideoConvert();
+
+    /** Convert the provided frame buffer data into the format specified in the
+     * constructor.
+     * @param fb the frame buffer to convert
+     * @return the converted data (user must free)
+     */
+    uint8_t* convert(uint8_t *fb);
+
+    /** Return the number of pixels that this buffer specifies
+     * @return number of pixels
+     */
+    int area() { return width * height; }
+
+  private:
+
+    /**
+     * Convert a bgr8888 input to rgb8888.
+     * @param fb the data to convert
+     * @return converted data
+     */
+    uint8_t* bgr8888rgb8888(uint8_t *fb);
+
+    /**
+     * Convert a bgr565 or rgb565 input to rgb8888.
+     * @param fb the data to convert
+     * @param bgr true if the input data is bgr565
+     * @return converted data
+     */
+    uint8_t* m565rgb8888(uint8_t *fb, bool bgr);
+
+    Mode inputMode;
+    Mode outputMode;
+    int width;
+    int height;
+};
+
+#endif // __BASE_VNC_CONVERT_HH__
+