99 lines
3.7 KiB
C
99 lines
3.7 KiB
C
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/* $XConsortium: iljpgencodedefs.h /main/3 1995/10/23 15:56:20 rswiston $ */
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/**---------------------------------------------------------------------
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***
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*** (c)Copyright 1992 Hewlett-Packard Co.
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***
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*** RESTRICTED RIGHTS LEGEND
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*** Use, duplication, or disclosure by the U.S. Government is subject to
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*** restrictions as set forth in sub-paragraph (c)(1)(ii) of the Rights in
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*** Technical Data and Computer Software clause in DFARS 252.227-7013.
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*** Hewlett-Packard Company
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*** 3000 Hanover Street
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*** Palo Alto, CA 94304 U.S.A.
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*** Rights for non-DOD U.S. Government Departments and Agencies are as set
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*** forth in FAR 52.227-19(c)(1,2).
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***
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***-------------------------------------------------------------------*/
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#ifndef ILJPGENCODEDEFS_H
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#define ILJPGENCODEDEFS_H
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#include "ilint.h"
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#include "ilerrors.h"
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/* Equate ILJPG errors to IL errors */
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#define ILJPG_ERROR_ENCODE_MALLOC IL_ERROR_MALLOC
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#define ILJPG_ERROR_ENCODE_PARS IL_ERROR_COMPRESSED_DATA
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#define ILJPG_ERROR_ENCODE_DCAC_TABLE IL_ERROR_COMPRESSED_DATA
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#define ILJPG_ERROR_ENCODE_Q_TABLE IL_ERROR_COMPRESSED_DATA
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/* Define a JPEG stream: "pBuffer" points to a buffer in
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memory, "pPastEndBuffer" points to byte just past end
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(buffer is of size "pPastEndBuffer" - "pBuffer") and
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pDst points to the place to store the next byte.
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*/
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typedef struct {
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ilPtr pBuffer;
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ilPtr pDst;
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ilPtr pPastEndBuffer;
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} ilJPEGEncodeStream, *ilJPEGEncodeStreamPtr;
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#define ILJPG_ENCODE_STREAM ilJPEGEncodeStreamPtr
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/* Called by ILJPG_ENCODE_PUT_BYTE() macro to reallocate the buffer
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defined by "pStream" so that there is space for *exactly* "nBytes" bytes
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to be written. Zero (0) is returned if success else an error code.
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*/
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IL_EXTERN iljpgError _ilReallocJPEGEncode (
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ilJPEGEncodeStreamPtr pStream,
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long nBytes
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);
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/* # of bytes by which to expand the size of the output buffer
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when realloc'ing to write one byte. NOTE: must be >= 1!
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*/
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#define ILJPG_REALLOC_EXTRA 1024
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/* Macro to put a byte to a stream. Return one (1) from macro
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if success, else return zero (0) and set "_error" to a
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non-zero error code.
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*/
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#define ILJPG_ENCODE_PUT_BYTE(_stream, _byte, _error) ( \
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((_stream)->pDst >= (_stream)->pPastEndBuffer) ? \
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((_error = _ilReallocJPEGEncode (_stream, ILJPG_REALLOC_EXTRA)) ? 0 : \
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(*(_stream)->pDst++ = _byte, 1)) : \
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(*(_stream)->pDst++ = _byte, 1) )
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/* Macro to return position within dst buffer, like ftell() */
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#define ILJPG_ENCODE_OFFSET(_stream) \
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((_stream)->pDst - (_stream)->pBuffer)
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#endif
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