/****************************************************************************
* graphics/nxglib/fb/nxglib_getrectangle.c
*
* Copyright (C) 2011 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 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <nuttx/fb.h>
#include <nuttx/nx/nxglib.h>
#include "nxglib_bitblit.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: nxgl_lowresmemcpy
****************************************************************************/
#if NXGLIB_BITSPERPIXEL < 8
static inline void nxgl_lowresmemcpy(FAR uint8_t *dline, FAR const uint8_t *sline,
unsigned int width,
uint8_t leadmask, uint8_t tailmask)
{
FAR const uint8_t *sptr;
FAR uint8_t *dptr;
uint8_t mask;
int lnlen;
/* Handle masking of the fractional initial byte */
mask = leadmask;
sptr = sline;
dptr = dline;
lnlen = width;
if (lnlen > 1 && mask)
{
dptr[0] = (dptr[0] & ~mask) | (sptr[0] & mask);
mask = 0xff;
dptr++;
sptr++;
lnlen--;
}
/* Handle masking of the fractional final byte */
mask &= tailmask;
if (lnlen > 0 && mask)
{
dptr[lnlen-1] = (dptr[lnlen-1] & ~mask) | (sptr[lnlen-1] & mask);
lnlen--;
}
/* Handle all of the unmasked bytes in-between */
if (lnlen > 0)
{
NXGL_MEMCPY(dptr, sptr, lnlen);
}
}
#endif
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: nxgl_getrectangle_*bpp
*
* Descripton:
* Fetch a rectangular region from framebuffer memory. The source is
* expressed as a rectangle.
*
****************************************************************************/
void NXGL_FUNCNAME(nxgl_getrectangle,NXGLIB_SUFFIX)
(FAR struct fb_planeinfo_s *pinfo, FAR const struct nxgl_rect_s *rect,
FAR void *dest, unsigned int deststride)
{
FAR const uint8_t *sline;
FAR uint8_t *dline;
unsigned int width;
unsigned int fbstride;
unsigned int rows;
#if NXGLIB_BITSPERPIXEL < 8
uint8_t leadmask;
uint8_t tailmask;
#endif
/* Get the width of the framebuffer in bytes */
fbstride = pinfo->stride;
/* Get the dimensions of the rectange to copy: width in pixels, height
* in rows
*/
width = rect->pt2.x - rect->pt1.x + 1;
rows = rect->pt2.y - rect->pt1.y + 1;
#if NXGLIB_BITSPERPIXEL < 8
# ifdef CONFIG_NX_PACKEDMSFIRST
/* Get the mask for pixels that are ordered so that they pack from the
* MS byte down.
*/
leadmask = (uint8_t)(0xff >> (8 - NXGL_REMAINDERX(rect->pt1.x)));
tailmask = (uint8_t)(0xff << (8 - NXGL_REMAINDERX(rect->pt2.x-1)));
# else
/* Get the mask for pixels that are ordered so that they pack from the
* LS byte up.
*/
leadmask = (uint8_t)(0xff << (8 - NXGL_REMAINDERX(rect->pt1.x)));
tailmask = (uint8_t)(0xff >> (8 - NXGL_REMAINDERX(rect->pt1.x-1)));
# endif
#endif
/* sline = address of the first pixel in the top row of the source in
* framebuffer memory
*/
sline = pinfo->fbmem + rect->pt1.y * fbstride + NXGL_SCALEX(rect->pt1.x);
/* dline = address of the first row pixel */
dline = (FAR uint8_t *)dest;
/* Yes.. Copy the rectangle */
while (rows--)
{
/* Copy the row */
#if NXGLIB_BITSPERPIXEL < 8
nxgl_lowresmemcpy(dline, sline, width, leadmask, tailmask);
#else
NXGL_MEMCPY(dline, sline, width);
#endif
/* Point to the next source/dest row below the current one */
dline += deststride;
sline += fbstride;
}
}
