/****************************************************************************
* NxWidgets/libnxwidgets/src/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 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <stdbool.h>
#include <cstring>
#include <nuttx/nx/nxglib.h>
#include "cbitmap.hxx"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Method Implementations
****************************************************************************/
using namespace NXWidgets;
/**
* Constructor.
*
* @param bitmap The bitmap structure being wrapped.
*/
CBitmap::CBitmap(const struct SBitmap *bitmap) : m_bitmap(bitmap) {}
/**
* Get the bitmap's color format.
*
* @return The bitmap's width.
*/
const uint8_t CBitmap::getColorFormat(void) const
{
return m_bitmap->fmt;
}
/**
* Get the bitmap's color format.
*
* @return The bitmap's color format.
*/
const uint8_t CBitmap::getBitsPerPixel(void) const
{
return m_bitmap->bpp;
}
/**
* Get the bitmap's width (in pixels/columns).
*
* @return The bitmap's pixel depth.
*/
const nxgl_coord_t CBitmap::getWidth(void) const
{
return m_bitmap->width;
}
/**
* Get the bitmap's height (in rows).
*
* @return The bitmap's height.
*/
const nxgl_coord_t CBitmap::getHeight(void) const
{
return m_bitmap->height;
}
/**
* Get the bitmap's width (in bytes).
*
* @return The bitmap's width.
*/
const nxgl_coord_t CBitmap::getStride(void) const
{
return m_bitmap->stride;
}
/**
* 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 CBitmap::getRun(nxgl_coord_t x, nxgl_coord_t y, nxgl_coord_t width,
FAR void *data)
{
// Check ranges. Casts to unsigned int are ugly but permit one-sided comparisons
if (((unsigned int)x < (unsigned int)width) &&
((unsigned int)(x + width) <= (unsigned int)m_bitmap->width) &&
((unsigned int)y < (unsigned int)m_bitmap->height))
{
// Get starting position of the copy (this will only work if bpp
// is an even multiple of bytes).
FAR uint8_t *start = (FAR uint8_t*)m_bitmap->data +
y * m_bitmap->stride +
((x * m_bitmap->bpp) >> 3);
// Get the number of bytes to copy.
unsigned int length = (width * m_bitmap->bpp) >> 3;
// And do the copy
memcpy(data, start, length);
return true;
}
return false;
}
