ibitmap.hxx

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/****************************************************************************
 * NxWidgets/libnxwidgets/include/ibitmap.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 most 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_IBITMAP_HXX
#define __INCLUDE_IBITMAP_HXX

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>

#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>

#include <nuttx/nx/nxglib.h>

/****************************************************************************
 * Pre-Processor Definitions
 ****************************************************************************/

/****************************************************************************
 * Implementation Classes
 ****************************************************************************/

#if defined(__cplusplus)

namespace NXWidgets
{
  /**
   * Abstract class defining the basic properties of a source bitmap.  The
   * primary intent of this class is two support a variety of sources of
   * bitmap data with various kinds of compression.
   */

  class IBitmap
  {
  public:
    /**
     * A virtual destructor is required in order to override the IBitmap
     * destructor.  We do this because if we delete IBitmap, we want the
     * destructor of the class that inherits from IBitmap to run, not this
     * one.
     */

    virtual ~IBitmap(void) { }

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

    virtual const uint8_t getColorFormat(void) const = 0;

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

    virtual const uint8_t getBitsPerPixel(void) const = 0;

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

    virtual const nxgl_coord_t getWidth(void) const = 0;

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

    virtual const nxgl_coord_t getHeight(void) const = 0;

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

    virtual const size_t getStride(void) const = 0;

    /**
     * Use the colors associated with a selected image.
     *
     * @param selected.  true: Use colors for a selected widget,
     *   false: Use normal (default) colors.
     */

    virtual void setSelected(bool selected) = 0;

    /**
     * Get one row from the bit map image using the selected colors.
     *
     * @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.
     */

    virtual bool getRun(nxgl_coord_t x, nxgl_coord_t y, nxgl_coord_t width,
                        FAR void *data) = 0;
  };
}

#endif // __cplusplus

#endif // __INCLUDE_IBITMAP_HXX