/****************************************************************************
* apps/graphics/tiff/tiff_addstrip.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 <assert.h>
#include <errno.h>
#include <debug.h>
#include <apps/tiff.h>
#include "tiff_internal.h"
/****************************************************************************
* Pre-Processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: tiff_addstrip
*
* Description:
* Convert an RGB565 strip to an RGB888 strip and write it to tmpfile2.
*
* Add an image data strip. The size of the strip in pixels must be equal
* to the RowsPerStrip x ImageWidth values that were provided to
* tiff_initialize().
*
* Input Parameters:
* info - A pointer to the caller allocated parameter passing/TIFF state instance.
* buffer - A buffer containing a single row of data.
*
* Returned Value:
* Zero (OK) on success. A negated errno value on failure.
*
****************************************************************************/
int tiff_convstrip(FAR struct tiff_info_s *info, FAR const uint8_t *strip)
{
#ifdef CONFIG_DEBUG_GRAPHICS
size_t ntotal;
#endif
size_t nbytes;
FAR uint16_t *src;
FAR uint8_t *dest;
uint16_t rgb565;
int ret;
int i;
DEBUGASSERT(info->iobuffer != NULL);
/* Convert each RGB565 pixel to RGB888 */
src = (FAR uint16_t *)strip;
dest = info->iobuffer;
nbytes = 0;
#ifdef CONFIG_DEBUG_GRAPHICS
ntotal = 0;
#endif
for (i = 0; i < info->pps; i++)
{
/* Convert RGB565 to RGB888 */
rgb565 = *src++;
*dest++ = (rgb565 >> (11-3)) & 0xf8; /* Move bits 11-15 to 3-7 */
*dest++ = (rgb565 >> ( 5-2)) & 0xfc; /* Move bits 5-10 to 2-7 */
*dest++ = (rgb565 << ( 3)) & 0xf8; /* Move bits 0- 4 to 3-7 */
/* Update the byte count */
nbytes += 3;
#ifdef CONFIG_DEBUG_GRAPHICS
ntotal += 3;
#endif
/* Flush the conversion buffer to tmpfile2 when it becomes full */
if (nbytes > (info->iosize-3))
{
ret = tiff_write(info->tmp2fd, info->iobuffer, nbytes);
if (ret < 0)
{
return ret;
}
/* Reset to refill the conversion buffer */
dest = info->iobuffer;
nbytes = 0;
}
}
/* Flush any buffer data to tmpfile2 */
ret = tiff_write(info->tmp2fd, info->iobuffer, nbytes);
#ifdef CONFIG_DEBUG_GRAPHICS
ASSERT(ntotal == info->bps);
#endif
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: tiff_addstrip
*
* Description:
* Add an image data strip. The size of the strip in pixels must be equal
* to the RowsPerStrip x ImageWidth values that were provided to
* tiff_initialize().
*
* Input Parameters:
* info - A pointer to the caller allocated parameter passing/TIFF state instance.
* buffer - A buffer containing a single row of data.
*
* Returned Value:
* Zero (OK) on success. A negated errno value on failure.
*
****************************************************************************/
int tiff_addstrip(FAR struct tiff_info_s *info, FAR const uint8_t *strip)
{
ssize_t newsize;
int ret;
/* Add the new strip based on the color format. For FB_FMT_RGB16_565,
* will have to perform a conversion to RGB888.
*/
if (info->colorfmt == FB_FMT_RGB16_565)
{
ret = tiff_convstrip(info, strip);
}
/* For other formats, it is a simple write using the number of bytes per strip */
else
{
ret = tiff_write(info->tmp2fd, strip, info->bps);
}
if (ret < 0)
{
goto errout;
}
/* Write the byte count to the outfile and the offset to tmpfile1 */
ret = tiff_putint32(info->outfd, info->bps);
if (ret < 0)
{
goto errout;
}
info->outsize += 4;
ret = tiff_putint32(info->tmp1fd, info->tmp2size);
if (ret < 0)
{
goto errout;
}
info->tmp1size += 4;
/* Increment the size of tmp2file. */
info->tmp2size += info->bps;
/* Pad tmpfile2 as necessary achieve word alignment */
newsize = tiff_wordalign(info->tmp2fd, info->tmp2size);
if (newsize < 0)
{
ret = (int)newsize;
goto errout;
}
info->tmp2size = (size_t)newsize;
/* Increment the number of strips in the TIFF file */
info->nstrips++;
return OK;
errout:
tiff_abort(info);
return ret;
}
