240 lines
7.1 KiB
C
240 lines
7.1 KiB
C
/****************************************************************************
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* apps/graphics/tiff/tiff_addstrip.c
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <apps/tiff.h>
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#include "tiff_internal.h"
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: tiff_addstrip
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*
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* Description:
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* Convert an RGB565 strip to an RGB888 strip and write it to tmpfile2.
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*
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* Add an image data strip. The size of the strip in pixels must be equal
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* to the RowsPerStrip x ImageWidth values that were provided to
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* tiff_initialize().
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*
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* Input Parameters:
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* info - A pointer to the caller allocated parameter passing/TIFF state instance.
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* buffer - A buffer containing a single row of data.
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*
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* Returned Value:
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* Zero (OK) on success. A negated errno value on failure.
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*
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****************************************************************************/
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int tiff_convstrip(FAR struct tiff_info_s *info, FAR const uint8_t *strip)
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{
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#ifdef CONFIG_DEBUG_GRAPHICS
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size_t ntotal;
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#endif
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size_t nbytes;
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FAR uint16_t *src;
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FAR uint8_t *dest;
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uint16_t rgb565;
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int ret;
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int i;
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DEBUGASSERT(info->iobuffer != NULL);
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/* Convert each RGB565 pixel to RGB888 */
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src = (FAR uint16_t *)strip;
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dest = info->iobuffer;
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nbytes = 0;
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#ifdef CONFIG_DEBUG_GRAPHICS
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ntotal = 0;
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#endif
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for (i = 0; i < info->pps; i++)
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{
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/* Convert RGB565 to RGB888 */
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rgb565 = *src++;
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*dest++ = (rgb565 >> (11-3)) & 0xf8; /* Move bits 11-15 to 3-7 */
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*dest++ = (rgb565 >> ( 5-2)) & 0xfc; /* Move bits 5-10 to 2-7 */
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*dest++ = (rgb565 << ( 3)) & 0xf8; /* Move bits 0- 4 to 3-7 */
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/* Update the byte count */
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nbytes += 3;
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#ifdef CONFIG_DEBUG_GRAPHICS
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ntotal += 3;
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#endif
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/* Flush the conversion buffer to tmpfile2 when it becomes full */
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if (nbytes > (info->iosize-3))
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{
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ret = tiff_write(info->tmp2fd, info->iobuffer, nbytes);
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if (ret < 0)
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{
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return ret;
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}
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/* Reset to refill the conversion buffer */
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dest = info->iobuffer;
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nbytes = 0;
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}
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}
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/* Flush any buffer data to tmpfile2 */
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ret = tiff_write(info->tmp2fd, info->iobuffer, nbytes);
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#ifdef CONFIG_DEBUG_GRAPHICS
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ASSERT(ntotal == info->bps);
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#endif
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return ret;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: tiff_addstrip
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*
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* Description:
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* Add an image data strip. The size of the strip in pixels must be equal
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* to the RowsPerStrip x ImageWidth values that were provided to
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* tiff_initialize().
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*
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* Input Parameters:
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* info - A pointer to the caller allocated parameter passing/TIFF state instance.
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* buffer - A buffer containing a single row of data.
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*
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* Returned Value:
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* Zero (OK) on success. A negated errno value on failure.
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*
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****************************************************************************/
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int tiff_addstrip(FAR struct tiff_info_s *info, FAR const uint8_t *strip)
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{
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ssize_t newsize;
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int ret;
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/* Add the new strip based on the color format. For FB_FMT_RGB16_565,
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* will have to perform a conversion to RGB888.
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*/
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if (info->colorfmt == FB_FMT_RGB16_565)
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{
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ret = tiff_convstrip(info, strip);
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}
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/* For other formats, it is a simple write using the number of bytes per strip */
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else
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{
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ret = tiff_write(info->tmp2fd, strip, info->bps);
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}
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if (ret < 0)
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{
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goto errout;
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}
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/* Write the byte count to the outfile and the offset to tmpfile1 */
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ret = tiff_putint32(info->outfd, info->bps);
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if (ret < 0)
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{
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goto errout;
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}
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info->outsize += 4;
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ret = tiff_putint32(info->tmp1fd, info->tmp2size);
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if (ret < 0)
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{
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goto errout;
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}
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info->tmp1size += 4;
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/* Increment the size of tmp2file. */
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info->tmp2size += info->bps;
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/* Pad tmpfile2 as necessary achieve word alignment */
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newsize = tiff_wordalign(info->tmp2fd, info->tmp2size);
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if (newsize < 0)
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{
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ret = (int)newsize;
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goto errout;
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}
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info->tmp2size = (size_t)newsize;
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/* Increment the number of strips in the TIFF file */
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info->nstrips++;
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return OK;
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errout:
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tiff_abort(info);
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return ret;
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}
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