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git-svn-id: svn://fileserver/activex/AVS/Sources/TeamlabOffice/trunk/ServerComponents@61945 954022d7-b5bf-4e40-9824-e11837661b57
147 lines
3.3 KiB
C
147 lines
3.3 KiB
C
/**
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* libpsd - Photoshop file formats (*.psd) decode library
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* Copyright (C) 2004-2007 Graphest Software.
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*
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* libpsd is the legal property of its developers, whose names are too numerous
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* to list here. Please refer to the COPYRIGHT file distributed with this
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* source distribution.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* $Id: psd_zip.c, created by Patrick in 2007.02.02, libpsd@graphest.com Exp $
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*/
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#include "libpsd.h"
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#include "psd_config.h"
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#ifdef PSD_INCLUDE_ZLIB
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#include "../zlib/zlib.h"
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#include <memory.h>
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psd_status psd_unzip_without_prediction(psd_uchar *src_buf, psd_int src_len,
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psd_uchar *dst_buf, psd_int dst_len)
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{
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z_stream stream;
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psd_int state;
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memset(&stream, 0, sizeof(z_stream));
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stream.data_type = Z_BINARY;
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stream.next_in = (Bytef *)src_buf;
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stream.avail_in = src_len;
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stream.next_out = (Bytef *)dst_buf;
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stream.avail_out = dst_len;
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if(inflateInit(&stream) != Z_OK)
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return psd_status_unzip_error;
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do {
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state = inflate(&stream, Z_PARTIAL_FLUSH);
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if(state == Z_STREAM_END)
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break;
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if(state == Z_DATA_ERROR || state != Z_OK)
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break;
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} while (stream.avail_out > 0);
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if (state != Z_STREAM_END && state != Z_OK)
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return psd_status_unzip_error;
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return psd_status_done;
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}
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static
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#ifdef __GNUC__
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__inline
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#else
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#ifdef __cplusplus
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inline
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#endif
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#endif
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psd_bool psd_test_big_endian(void)
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{
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static psd_bool result = 2;
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const psd_int byte_order[1] = { 1 };
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if (result == 2)
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{
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if(((char *)byte_order)[0] == 1)
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result = psd_false;
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else
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result = psd_true;
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}
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return result;
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}
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psd_status psd_unzip_with_prediction(psd_uchar *src_buf, psd_int src_len,
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psd_uchar *dst_buf, psd_int dst_len,
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psd_int row_size, psd_int color_depth)
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{
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psd_status status;
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psd_bool big_endian;
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int len;
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psd_uchar * buf;
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psd_ushort * wbuf;
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status = psd_unzip_without_prediction(src_buf, src_len, dst_buf, dst_len);
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if(status != psd_status_done)
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return status;
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big_endian = psd_test_big_endian();
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buf = dst_buf;
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wbuf = (psd_ushort *)dst_buf;
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do {
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len = row_size;
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if (color_depth == 16)
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{
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if (big_endian == psd_true)
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{
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while(--len)
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{
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*(wbuf + 1) += *wbuf;
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wbuf ++;
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}
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wbuf ++;
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}
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else
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{
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while(--len)
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{
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*(buf + 2) += *buf + ((*(buf + 1) + *(buf + 3)) >> 8);
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*(buf + 3) += *(buf + 1);
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buf += 2;
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}
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buf += 2;
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}
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dst_len -= row_size * 2;
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}
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else
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{
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while(--len)
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{
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*(buf + 1) += *buf;
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buf ++;
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}
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buf ++;
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dst_len -= row_size;
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}
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} while(dst_len > 0);
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return psd_status_done;
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}
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#endif // ifdef PSD_INCLUDE_ZLIB
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