px4_autopilot/NxWidgets/libnxwidgets/include/cbitmap.hxx

/****************************************************************************
 * NxWidgets/libnxwidgets/include/cbitmap.hxx
 *
 *   Copyright (C) 2012 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. Neither the name NuttX, NxWidgets, nor the names of its contributors
 *    me 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.
 *
 ****************************************************************************
 *
 * Portions of this package derive from Woopsi (http://woopsi.org/) and
 * portions are original efforts.  It is difficult to determine at this
 * point what parts are original efforts and which parts derive from Woopsi.
 * However, in any event, the work of  Antony Dzeryn will be acknowledged
 * in all NxWidget files.  Thanks Antony!
 *
 *   Copyright (c) 2007-2011, Antony Dzeryn
 *   All rights reserved.
 *
 * 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 names "Woopsi", "Simian Zombie" 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 Antony Dzeryn ``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 Antony Dzeryn 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.
 *
 ****************************************************************************/

#ifndef __INCLUDE_CBITMAP_HXX
#define __INCLUDE_CBITMAP_HXX

/****************************************************************************
 * Included Files
 ****************************************************************************/
 
#include <nuttx/config.h>

#include <stdint.h>
#include <stdbool.h>

#include <nuttx/nx/nxglib.h>

#include "nxconfig.hxx"
#include "ibitmap.hxx"

/****************************************************************************
 * Pre-Processor Definitions
 ****************************************************************************/
 
/****************************************************************************
 * Implementation Classes
 ****************************************************************************/
 
#if defined(__cplusplus)

namespace NXWidgets
{
  /**
   * Bitmap Structure
   */

  struct SBitmap
  {
    uint8_t               bpp;    /**< Bits per pixel */
    uint8_t               fmt;    /**< Color format */
    nxgl_coord_t          width;  /**< Width in pixels */
    nxgl_coord_t          height; /**< Height in rows */
    uint16_t              stride; /**< Width in bytes */
    FAR const void       *data;   /**< Pointer to the beginning of pixel data */
  };

  /**
   * Class providing bitmap accessor for a bitmap represented by SBitmap.
   */

  class CBitmap : public IBitmap
  {
  protected:
    const struct SBitmap *m_bitmap;  /**< The bitmap that is being managed */
    
    /**
     * Copy constructor is protected to prevent usage.
     */

    inline CBitmap(const CBitmap &bitmap) { }

  public:

    /**
     * Constructor.
     *
     * @param bitmap The bitmap structure being wrapped.
     */

    CBitmap(const struct SBitmap *bitmap);

    /**
     * Destructor.
     */

    inline ~CBitmap(void) {}

    /**
     * Get the bitmap's color format.
     *
     * @return The bitmap's width.
     */

    const uint8_t getColorFormat(void) const;

    /**
     * Get the bitmap's color format.
     *
     * @return The bitmap's color format.
     */

    const uint8_t getBitsPerPixel(void) const;

    /**
     * Get the bitmap's width (in pixels/columns).
     *
     * @return The bitmap's pixel depth.
     */

    const nxgl_coord_t getWidth(void) const;

    /**
     * Get the bitmap's height (in rows).
     *
     * @return The bitmap's height.
     */

    const nxgl_coord_t getHeight(void) const;

    /**
     * Get the bitmap's width (in bytes).
     *
     * @return The bitmap's width.
     */

    const nxgl_coord_t getStride(void) const;

    /**
     * Get one row from the bit map image.
     *
     * @param x The offset into the row to get
     * @param y The row number to get
     * @param width The number of pixels to get from the row
     * @param data The memory location provided by the caller
     *   in which to return the data.  This should be at least
     *   (getWidth()*getBitsPerPixl() + 7)/8 bytes in length
     *   and properly aligned for the pixel color format.
     * @param True if the run was returned successfully.
     */

    bool getRun(nxgl_coord_t x, nxgl_coord_t y, nxgl_coord_t width,
                FAR void *data);
  };
}

#endif // __cplusplus

#endif // __INCLUDE_CBITMAP_HXX