diff options
Diffstat (limited to 'plugins/FreeImage/Source/LibMNG/libmng_jpeg.c')
| -rw-r--r-- | plugins/FreeImage/Source/LibMNG/libmng_jpeg.c | 1088 |
1 files changed, 0 insertions, 1088 deletions
diff --git a/plugins/FreeImage/Source/LibMNG/libmng_jpeg.c b/plugins/FreeImage/Source/LibMNG/libmng_jpeg.c deleted file mode 100644 index 409f6df74d..0000000000 --- a/plugins/FreeImage/Source/LibMNG/libmng_jpeg.c +++ /dev/null @@ -1,1088 +0,0 @@ -/* ************************************************************************** */
-/* * For conditions of distribution and use, * */
-/* * see copyright notice in libmng.h * */
-/* ************************************************************************** */
-/* * * */
-/* * project : libmng * */
-/* * file : libmng_jpeg.c copyright (c) 2000-2004 G.Juyn * */
-/* * version : 1.0.9 * */
-/* * * */
-/* * purpose : JPEG library interface (implementation) * */
-/* * * */
-/* * author : G.Juyn * */
-/* * * */
-/* * comment : implementation of the JPEG library interface * */
-/* * * */
-/* * changes : 0.5.1 - 05/08/2000 - G.Juyn * */
-/* * - changed strict-ANSI stuff * */
-/* * * */
-/* * 0.5.2 - 05/22/2000 - G.Juyn * */
-/* * - implemented all the JNG routines * */
-/* * * */
-/* * 0.5.3 - 06/17/2000 - G.Juyn * */
-/* * - added tracing of JPEG calls * */
-/* * 0.5.3 - 06/24/2000 - G.Juyn * */
-/* * - fixed inclusion of IJG read/write code * */
-/* * 0.5.3 - 06/29/2000 - G.Juyn * */
-/* * - fixed some 64-bit warnings * */
-/* * * */
-/* * 0.9.2 - 08/05/2000 - G.Juyn * */
-/* * - changed file-prefixes * */
-/* * * */
-/* * 0.9.3 - 10/16/2000 - G.Juyn * */
-/* * - added support for JDAA * */
-/* * * */
-/* * 1.0.1 - 04/19/2001 - G.Juyn * */
-/* * - added export of JPEG functions for DLL * */
-/* * 1.0.1 - 04/22/2001 - G.Juyn * */
-/* * - fixed memory-leaks (Thanks Gregg!) * */
-/* * * */
-/* * 1.0.4 - 06/22/2002 - G.Juyn * */
-/* * - B526138 - returned IJGSRC6B calling convention to * */
-/* * default for MSVC * */
-/* * * */
-/* * 1.0.5 - 24/02/2003 - G.Juyn * */
-/* * - B683152 - libjpeg suspension not always honored correctly* */
-/* * * */
-/* * 1.0.6 - 03/04/2003 - G.Juyn * */
-/* * - fixed some compiler-warnings * */
-/* * * */
-/* * 1.0.8 - 08/01/2004 - G.Juyn * */
-/* * - added support for 3+byte pixelsize for JPEG's * */
-/* * * */
-/* * 1.0.9 - 12/20/2004 - G.Juyn * */
-/* * - cleaned up macro-invocations (thanks to D. Airlie) * */
-/* * * */
-/* ************************************************************************** */
-
-#include "libmng.h"
-#include "libmng_data.h"
-#include "libmng_error.h"
-#include "libmng_trace.h"
-#ifdef __BORLANDC__
-#pragma hdrstop
-#endif
-#include "libmng_memory.h"
-#include "libmng_pixels.h"
-#include "libmng_jpeg.h"
-
-#if defined(__BORLANDC__) && defined(MNG_STRICT_ANSI)
-#pragma option -A /* force ANSI-C */
-#endif
-
-/* ************************************************************************** */
-
-#if defined(MNG_INCLUDE_JNG) && defined(MNG_INCLUDE_DISPLAY_PROCS)
-
-/* ************************************************************************** */
-/* * * */
-/* * Local IJG callback routines (source-manager, error-manager and such) * */
-/* * * */
-/* ************************************************************************** */
-
-#ifdef MNG_INCLUDE_IJG6B
-
-/* ************************************************************************** */
-
-#ifdef MNG_INCLUDE_JNG_READ
-#ifdef MNG_DEFINE_JPEG_STDCALL
-void MNG_DECL mng_init_source (j_decompress_ptr cinfo)
-#else
-void mng_init_source (j_decompress_ptr cinfo)
-#endif
-{
- return; /* nothing needed */
-}
-#endif /* MNG_INCLUDE_JNG_READ */
-
-/* ************************************************************************** */
-
-#ifdef MNG_INCLUDE_JNG_READ
-#ifdef MNG_DEFINE_JPEG_STDCALL
-boolean MNG_DECL mng_fill_input_buffer (j_decompress_ptr cinfo)
-#else
-boolean mng_fill_input_buffer (j_decompress_ptr cinfo)
-#endif
-{
- return FALSE; /* force IJG routine to return to caller */
-}
-#endif /* MNG_INCLUDE_JNG_READ */
-
-/* ************************************************************************** */
-
-#ifdef MNG_INCLUDE_JNG_READ
-#ifdef MNG_DEFINE_JPEG_STDCALL
-void MNG_DECL mng_skip_input_data (j_decompress_ptr cinfo, long num_bytes)
-#else
-void mng_skip_input_data (j_decompress_ptr cinfo, long num_bytes)
-#endif
-{
- if (num_bytes > 0) /* ignore fony calls */
- { /* address my generic structure */
- mng_datap pData = (mng_datap)cinfo->client_data;
- /* address source manager */
- mngjpeg_sourcep pSrc = pData->pJPEGdinfo->src;
- /* problem scenario ? */
- if (pSrc->bytes_in_buffer < (size_t)num_bytes)
- { /* tell the boss we need to skip some data! */
- pData->iJPEGtoskip = (mng_uint32)((size_t)num_bytes - pSrc->bytes_in_buffer);
-
- pSrc->bytes_in_buffer = 0; /* let the JPEG lib suspend */
- pSrc->next_input_byte = MNG_NULL;
- }
- else
- { /* simply advance in the buffer */
- pSrc->bytes_in_buffer -= num_bytes;
- pSrc->next_input_byte += num_bytes;
- }
- }
-
- return;
-}
-#endif /* MNG_INCLUDE_JNG_READ */
-
-/* ************************************************************************** */
-
-#ifdef MNG_INCLUDE_JNG_READ
-#ifdef MNG_DEFINE_JPEG_STDCALL
-void MNG_DECL mng_skip_input_data2 (j_decompress_ptr cinfo, long num_bytes)
-#else
-void mng_skip_input_data2 (j_decompress_ptr cinfo, long num_bytes)
-#endif
-{
- if (num_bytes > 0) /* ignore fony calls */
- { /* address my generic structure */
- mng_datap pData = (mng_datap)cinfo->client_data;
- /* address source manager */
- mngjpeg_sourcep pSrc = pData->pJPEGdinfo2->src;
- /* problem scenario ? */
- if (pSrc->bytes_in_buffer < (size_t)num_bytes)
- { /* tell the boss we need to skip some data! */
- pData->iJPEGtoskip2 = (mng_uint32)((size_t)num_bytes - pSrc->bytes_in_buffer);
-
- pSrc->bytes_in_buffer = 0; /* let the JPEG lib suspend */
- pSrc->next_input_byte = MNG_NULL;
- }
- else
- { /* simply advance in the buffer */
- pSrc->bytes_in_buffer -= num_bytes;
- pSrc->next_input_byte += num_bytes;
- }
- }
-
- return;
-}
-#endif /* MNG_INCLUDE_JNG_READ */
-
-/* ************************************************************************** */
-
-#ifdef MNG_INCLUDE_JNG_READ
-#ifdef MNG_DEFINE_JPEG_STDCALL
-void MNG_DECL mng_term_source (j_decompress_ptr cinfo)
-#else
-void mng_term_source (j_decompress_ptr cinfo)
-#endif
-{
- return; /* nothing needed */
-}
-#endif /* MNG_INCLUDE_JNG_READ */
-
-/* ************************************************************************** */
-
-#ifdef MNG_USE_SETJMP
-#ifdef MNG_DEFINE_JPEG_STDCALL
-void MNG_DECL mng_error_exit (j_common_ptr cinfo)
-#else
-void mng_error_exit (j_common_ptr cinfo)
-#endif
-{ /* address my generic structure */
- mng_datap pData = (mng_datap)cinfo->client_data;
-
-#ifdef MNG_ERROR_TELLTALE /* fill the message text ??? */
- (*cinfo->err->output_message) (cinfo);
-#endif
- /* return to the point of no return... */
- longjmp (pData->sErrorbuf, cinfo->err->msg_code);
-}
-#endif /* MNG_USE_SETJMP */
-
-/* ************************************************************************** */
-
-#ifdef MNG_USE_SETJMP
-#ifdef MNG_DEFINE_JPEG_STDCALL
-void MNG_DECL mng_output_message (j_common_ptr cinfo)
-#else
-void mng_output_message (j_common_ptr cinfo)
-#endif
-{
- return; /* just do nothing ! */
-}
-#endif /* MNG_USE_SETJMP */
-
-/* ************************************************************************** */
-
-#endif /* MNG_INCLUDE_IJG6B */
-
-/* ************************************************************************** */
-/* * * */
-/* * Global JPEG routines * */
-/* * * */
-/* ************************************************************************** */
-
-mng_retcode mngjpeg_initialize (mng_datap pData)
-{
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_INITIALIZE, MNG_LC_START);
-#endif
- /* allocate space for JPEG structures if necessary */
-#ifdef MNG_INCLUDE_JNG_READ
- if (pData->pJPEGderr == MNG_NULL)
- MNG_ALLOC (pData, pData->pJPEGderr, sizeof (mngjpeg_error ));
- if (pData->pJPEGdsrc == MNG_NULL)
- MNG_ALLOC (pData, pData->pJPEGdsrc, sizeof (mngjpeg_source));
- if (pData->pJPEGdinfo == MNG_NULL)
- MNG_ALLOC (pData, pData->pJPEGdinfo, sizeof (mngjpeg_decomp));
- /* enable reverse addressing */
- pData->pJPEGdinfo->client_data = pData;
-
- if (pData->pJPEGderr2 == MNG_NULL)
- MNG_ALLOC (pData, pData->pJPEGderr2, sizeof (mngjpeg_error ));
- if (pData->pJPEGdsrc2 == MNG_NULL)
- MNG_ALLOC (pData, pData->pJPEGdsrc2, sizeof (mngjpeg_source));
- if (pData->pJPEGdinfo2 == MNG_NULL)
- MNG_ALLOC (pData, pData->pJPEGdinfo2, sizeof (mngjpeg_decomp));
- /* enable reverse addressing */
- pData->pJPEGdinfo2->client_data = pData;
-#endif
-
-#ifdef MNG_INCLUDE_JNG_WRITE
- if (pData->pJPEGcerr == MNG_NULL)
- MNG_ALLOC (pData, pData->pJPEGcerr, sizeof (mngjpeg_error ));
- if (pData->pJPEGcinfo == MNG_NULL)
- MNG_ALLOC (pData, pData->pJPEGcinfo, sizeof (mngjpeg_comp ));
- /* enable reverse addressing */
- pData->pJPEGcinfo->client_data = pData;
-#endif
-
- if (pData->pJPEGbuf == MNG_NULL) /* initialize temporary buffers */
- {
- pData->iJPEGbufmax = MNG_JPEG_MAXBUF;
- MNG_ALLOC (pData, pData->pJPEGbuf, pData->iJPEGbufmax);
- }
-
- if (pData->pJPEGbuf2 == MNG_NULL)
- {
- pData->iJPEGbufmax2 = MNG_JPEG_MAXBUF;
- MNG_ALLOC (pData, pData->pJPEGbuf2, pData->iJPEGbufmax2);
- }
-
- pData->pJPEGcurrent = pData->pJPEGbuf;
- pData->iJPEGbufremain = 0;
- pData->pJPEGrow = MNG_NULL;
- pData->iJPEGrowlen = 0;
- pData->iJPEGtoskip = 0;
-
- pData->pJPEGcurrent2 = pData->pJPEGbuf2;
- pData->iJPEGbufremain2 = 0;
- pData->pJPEGrow2 = MNG_NULL;
- pData->iJPEGrowlen2 = 0;
- pData->iJPEGtoskip2 = 0;
- /* not doing anything yet ! */
- pData->bJPEGcompress = MNG_FALSE;
-
- pData->bJPEGdecompress = MNG_FALSE;
- pData->bJPEGhasheader = MNG_FALSE;
- pData->bJPEGdecostarted = MNG_FALSE;
- pData->bJPEGscanstarted = MNG_FALSE;
- pData->bJPEGscanending = MNG_FALSE;
-
- pData->bJPEGdecompress2 = MNG_FALSE;
- pData->bJPEGhasheader2 = MNG_FALSE;
- pData->bJPEGdecostarted2 = MNG_FALSE;
- pData->bJPEGscanstarted2 = MNG_FALSE;
-
- pData->iJPEGrow = 0; /* zero input/output lines */
- pData->iJPEGalpharow = 0;
- pData->iJPEGrgbrow = 0;
- pData->iJPEGdisprow = 0;
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_INITIALIZE, MNG_LC_END);
-#endif
-
- return MNG_NOERROR;
-}
-
-/* ************************************************************************** */
-
-mng_retcode mngjpeg_cleanup (mng_datap pData)
-{
-#if defined(MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
- mng_retcode iRetcode;
-#endif
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_CLEANUP, MNG_LC_START);
-#endif
-
-#ifdef MNG_INCLUDE_IJG6B
-#ifdef MNG_USE_SETJMP
- iRetcode = setjmp (pData->sErrorbuf);/* setup local JPEG error-recovery */
- if (iRetcode != 0) /* got here from longjmp ? */
- MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
-#endif
-
-#ifdef MNG_INCLUDE_JNG_READ /* still decompressing something ? */
- if (pData->bJPEGdecompress)
- jpeg_destroy_decompress (pData->pJPEGdinfo);
- if (pData->bJPEGdecompress2)
- jpeg_destroy_decompress (pData->pJPEGdinfo2);
-#endif
-
-#ifdef MNG_INCLUDE_JNG_WRITE
- if (pData->bJPEGcompress) /* still compressing something ? */
- jpeg_destroy_compress (pData->pJPEGcinfo);
-#endif
-
-#endif /* MNG_INCLUDE_IJG6B */
- /* cleanup temporary buffers */
- MNG_FREE (pData, pData->pJPEGbuf2, pData->iJPEGbufmax2);
- MNG_FREE (pData, pData->pJPEGbuf, pData->iJPEGbufmax);
- /* cleanup space for JPEG structures */
-#ifdef MNG_INCLUDE_JNG_WRITE
- MNG_FREE (pData, pData->pJPEGcinfo, sizeof (mngjpeg_comp ));
- MNG_FREE (pData, pData->pJPEGcerr, sizeof (mngjpeg_error ));
-#endif
-
-#ifdef MNG_INCLUDE_JNG_READ
- MNG_FREE (pData, pData->pJPEGdinfo, sizeof (mngjpeg_decomp));
- MNG_FREE (pData, pData->pJPEGdsrc, sizeof (mngjpeg_source));
- MNG_FREE (pData, pData->pJPEGderr, sizeof (mngjpeg_error ));
- MNG_FREE (pData, pData->pJPEGdinfo2, sizeof (mngjpeg_decomp));
- MNG_FREE (pData, pData->pJPEGdsrc2, sizeof (mngjpeg_source));
- MNG_FREE (pData, pData->pJPEGderr2, sizeof (mngjpeg_error ));
-#endif
-
- MNG_FREE (pData, pData->pJPEGrow2, pData->iJPEGrowlen2);
- MNG_FREE (pData, pData->pJPEGrow, pData->iJPEGrowlen);
- /* whatever we were doing ... */
- /* we don't anymore ... */
- pData->bJPEGcompress = MNG_FALSE;
-
- pData->bJPEGdecompress = MNG_FALSE;
- pData->bJPEGhasheader = MNG_FALSE;
- pData->bJPEGdecostarted = MNG_FALSE;
- pData->bJPEGscanstarted = MNG_FALSE;
- pData->bJPEGscanending = MNG_FALSE;
-
- pData->bJPEGdecompress2 = MNG_FALSE;
- pData->bJPEGhasheader2 = MNG_FALSE;
- pData->bJPEGdecostarted2 = MNG_FALSE;
- pData->bJPEGscanstarted2 = MNG_FALSE;
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_CLEANUP, MNG_LC_END);
-#endif
-
- return MNG_NOERROR;
-}
-
-/* ************************************************************************** */
-/* * * */
-/* * JPEG decompression routines (JDAT) * */
-/* * * */
-/* ************************************************************************** */
-
-#ifdef MNG_INCLUDE_JNG_READ
-mng_retcode mngjpeg_decompressinit (mng_datap pData)
-{
-#if defined(MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
- mng_retcode iRetcode;
-#endif
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSINIT, MNG_LC_START);
-#endif
-
-#ifdef MNG_INCLUDE_IJG6B
- /* allocate and initialize a JPEG decompression object */
- pData->pJPEGdinfo->err = jpeg_std_error (pData->pJPEGderr);
-
-#ifdef MNG_USE_SETJMP /* setup local JPEG error-routines */
- pData->pJPEGderr->error_exit = mng_error_exit;
- pData->pJPEGderr->output_message = mng_output_message;
-
- iRetcode = setjmp (pData->sErrorbuf);/* setup local JPEG error-recovery */
- if (iRetcode != 0) /* got here from longjmp ? */
- MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
-#endif /* MNG_USE_SETJMP */
-
- /* allocate and initialize a JPEG decompression object (continued) */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSINIT, MNG_LC_JPEG_CREATE_DECOMPRESS)
-#endif
- jpeg_create_decompress (pData->pJPEGdinfo);
-
- pData->bJPEGdecompress = MNG_TRUE; /* indicate it's initialized */
-
- /* specify the source of the compressed data (eg, a file) */
- /* no, not a file; we have buffered input */
- pData->pJPEGdinfo->src = pData->pJPEGdsrc;
- /* use the default handler */
- pData->pJPEGdinfo->src->resync_to_restart = jpeg_resync_to_restart;
- /* setup local source routine & parms */
- pData->pJPEGdinfo->src->init_source = mng_init_source;
- pData->pJPEGdinfo->src->fill_input_buffer = mng_fill_input_buffer;
- pData->pJPEGdinfo->src->skip_input_data = mng_skip_input_data;
- pData->pJPEGdinfo->src->term_source = mng_term_source;
- pData->pJPEGdinfo->src->next_input_byte = pData->pJPEGcurrent;
- pData->pJPEGdinfo->src->bytes_in_buffer = pData->iJPEGbufremain;
-
-#endif /* MNG_INCLUDE_IJG6B */
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSINIT, MNG_LC_END);
-#endif
-
- return MNG_NOERROR;
-}
-#endif /* MNG_INCLUDE_JNG_READ */
-
-/* ************************************************************************** */
-
-#ifdef MNG_INCLUDE_JNG_READ
-mng_retcode mngjpeg_decompressdata (mng_datap pData,
- mng_uint32 iRawsize,
- mng_uint8p pRawdata)
-{
- mng_retcode iRetcode;
- mng_uint32 iRemain;
- mng_uint8p pWork;
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_START);
-#endif
-
-#if defined (MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
- iRetcode = setjmp (pData->sErrorbuf);/* initialize local JPEG error-recovery */
- if (iRetcode != 0) /* got here from longjmp ? */
- MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
-#endif
-
- pWork = pRawdata;
- iRemain = iRawsize;
-
- if (pData->iJPEGtoskip) /* JPEG-lib told us to skip some more data ? */
- {
- if (iRemain > pData->iJPEGtoskip) /* enough data in this buffer ? */
- {
- iRemain -= pData->iJPEGtoskip; /* skip enough to access the next byte */
- pWork += pData->iJPEGtoskip;
-
- pData->iJPEGtoskip = 0; /* no more to skip then */
- }
- else
- {
- pData->iJPEGtoskip -= iRemain; /* skip all data in the buffer */
- iRemain = 0; /* and indicate this accordingly */
- }
- /* the skip set current-pointer to NULL ! */
- pData->pJPEGcurrent = pData->pJPEGbuf;
- }
-
- while (iRemain) /* repeat until no more input-bytes */
- { /* need to shift anything ? */
- if ((pData->pJPEGcurrent > pData->pJPEGbuf) &&
- (pData->pJPEGcurrent - pData->pJPEGbuf + pData->iJPEGbufremain + iRemain > pData->iJPEGbufmax))
- {
- if (pData->iJPEGbufremain > 0) /* then do so */
- MNG_COPY (pData->pJPEGbuf, pData->pJPEGcurrent, pData->iJPEGbufremain);
-
- pData->pJPEGcurrent = pData->pJPEGbuf;
- }
- /* does the remaining input fit into the buffer ? */
- if (pData->iJPEGbufremain + iRemain <= pData->iJPEGbufmax)
- { /* move the lot */
- MNG_COPY ((pData->pJPEGcurrent + pData->iJPEGbufremain), pWork, iRemain);
-
- pData->iJPEGbufremain += iRemain;/* adjust remaining_bytes counter */
- iRemain = 0; /* and indicate there's no input left */
- }
- else
- { /* calculate what does fit */
- mng_uint32 iFits = pData->iJPEGbufmax - pData->iJPEGbufremain;
-
- if (iFits <= 0) /* no space is just bugger 'm all */
- MNG_ERROR (pData, MNG_JPEGBUFTOOSMALL);
- /* move that */
- MNG_COPY ((pData->pJPEGcurrent + pData->iJPEGbufremain), pWork, iFits);
-
- pData->iJPEGbufremain += iFits; /* adjust remain_bytes counter */
- iRemain -= iFits; /* and the input-parms */
- pWork += iFits;
- }
-
-#ifdef MNG_INCLUDE_IJG6B
- pData->pJPEGdinfo->src->next_input_byte = pData->pJPEGcurrent;
- pData->pJPEGdinfo->src->bytes_in_buffer = pData->iJPEGbufremain;
-
- if (!pData->bJPEGhasheader) /* haven't got the header yet ? */
- {
- /* call jpeg_read_header() to obtain image info */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_READ_HEADER)
-#endif
- if (jpeg_read_header (pData->pJPEGdinfo, TRUE) != JPEG_SUSPENDED)
- { /* indicate the header's oke */
- pData->bJPEGhasheader = MNG_TRUE;
- /* let's do some sanity checks ! */
- if ((pData->pJPEGdinfo->image_width != pData->iDatawidth ) ||
- (pData->pJPEGdinfo->image_height != pData->iDataheight) )
- MNG_ERROR (pData, MNG_JPEGPARMSERR);
-
- if ( ((pData->iJHDRcolortype == MNG_COLORTYPE_JPEGGRAY ) ||
- (pData->iJHDRcolortype == MNG_COLORTYPE_JPEGGRAYA) ) &&
- (pData->pJPEGdinfo->jpeg_color_space != JCS_GRAYSCALE ) )
- MNG_ERROR (pData, MNG_JPEGPARMSERR);
-
- if ( ((pData->iJHDRcolortype == MNG_COLORTYPE_JPEGCOLOR ) ||
- (pData->iJHDRcolortype == MNG_COLORTYPE_JPEGCOLORA) ) &&
- (pData->pJPEGdinfo->jpeg_color_space != JCS_YCbCr ) )
- MNG_ERROR (pData, MNG_JPEGPARMSERR);
- /* indicate whether or not it's progressive */
- pData->bJPEGprogressive = (mng_bool)jpeg_has_multiple_scans (pData->pJPEGdinfo);
- /* progressive+alpha can't display "on-the-fly"!! */
- if ((pData->bJPEGprogressive) &&
- ((pData->iJHDRcolortype == MNG_COLORTYPE_JPEGGRAYA ) ||
- (pData->iJHDRcolortype == MNG_COLORTYPE_JPEGCOLORA) ))
- pData->fDisplayrow = MNG_NULL;
- /* allocate a row of JPEG-samples */
- if (pData->pJPEGdinfo->jpeg_color_space == JCS_YCbCr)
- pData->iJPEGrowlen = pData->pJPEGdinfo->image_width * RGB_PIXELSIZE;
- else
- pData->iJPEGrowlen = pData->pJPEGdinfo->image_width;
-
- MNG_ALLOC (pData, pData->pJPEGrow, pData->iJPEGrowlen);
-
- pData->iJPEGrgbrow = 0; /* quite empty up to now */
- }
-
- pData->pJPEGcurrent = (mng_uint8p)pData->pJPEGdinfo->src->next_input_byte;
- pData->iJPEGbufremain = (mng_uint32)pData->pJPEGdinfo->src->bytes_in_buffer;
- }
- /* decompress not started ? */
- if ((pData->bJPEGhasheader) && (!pData->bJPEGdecostarted))
- {
- /* set parameters for decompression */
-
- if (pData->bJPEGprogressive) /* progressive display ? */
- pData->pJPEGdinfo->buffered_image = TRUE;
-
- /* jpeg_start_decompress(...); */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_START_DECOMPRESS)
-#endif
- if (jpeg_start_decompress (pData->pJPEGdinfo) == TRUE)
- /* indicate it started */
- pData->bJPEGdecostarted = MNG_TRUE;
-
- pData->pJPEGcurrent = (mng_uint8p)pData->pJPEGdinfo->src->next_input_byte;
- pData->iJPEGbufremain = (mng_uint32)pData->pJPEGdinfo->src->bytes_in_buffer;
- }
- /* process some scanlines ? */
- if ((pData->bJPEGhasheader) && (pData->bJPEGdecostarted) &&
- ((!jpeg_input_complete (pData->pJPEGdinfo)) ||
- (pData->pJPEGdinfo->output_scanline < pData->pJPEGdinfo->output_height) ||
- ((pData->bJPEGprogressive) && (pData->bJPEGscanending))))
- {
- mng_int32 iLines = 0;
-
- /* for (each output pass) */
- do
- { /* address the row output buffer */
- JSAMPROW pRow = (JSAMPROW)pData->pJPEGrow;
-
- /* init new pass ? */
- if ((pData->bJPEGprogressive) && (!pData->bJPEGscanstarted))
- {
- pData->bJPEGscanstarted = MNG_TRUE;
-
- /* adjust output decompression parameters if required */
- /* nop */
-
- /* start a new output pass */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_START_OUTPUT)
-#endif
- jpeg_start_output (pData->pJPEGdinfo, pData->pJPEGdinfo->input_scan_number);
-
- pData->iJPEGrow = 0; /* start at row 0 in the image again */
- }
-
- /* while (scan lines remain to be read) */
- if ((!pData->bJPEGprogressive) || (!pData->bJPEGscanending))
- {
- do
- {
- /* jpeg_read_scanlines(...); */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_READ_SCANLINES)
-#endif
- iLines = jpeg_read_scanlines (pData->pJPEGdinfo, (JSAMPARRAY)&pRow, 1);
-
- pData->pJPEGcurrent = (mng_uint8p)pData->pJPEGdinfo->src->next_input_byte;
- pData->iJPEGbufremain = (mng_uint32)pData->pJPEGdinfo->src->bytes_in_buffer;
-
- if (iLines > 0) /* got something ? */
- {
- if (pData->fStorerow2) /* store in object ? */
- {
- iRetcode = ((mng_storerow)pData->fStorerow2) (pData);
-
- if (iRetcode) /* on error bail out */
- return iRetcode;
-
- }
- }
- }
- while ((pData->pJPEGdinfo->output_scanline < pData->pJPEGdinfo->output_height) &&
- (iLines > 0)); /* until end-of-image or not enough input-data */
- }
-
- /* terminate output pass */
- if ((pData->bJPEGprogressive) &&
- (pData->pJPEGdinfo->output_scanline >= pData->pJPEGdinfo->output_height))
- {
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_FINISH_OUTPUT)
-#endif
- if (jpeg_finish_output (pData->pJPEGdinfo) != JPEG_SUSPENDED)
- { /* this scan has ended */
- pData->bJPEGscanstarted = MNG_FALSE;
- pData->bJPEGscanending = MNG_FALSE;
- }
- else
- {
- pData->bJPEGscanending = MNG_TRUE;
- }
- }
- }
- while ((!jpeg_input_complete (pData->pJPEGdinfo)) &&
- (iLines > 0) && (!pData->bJPEGscanending));
- }
- /* end of image ? */
- if ((pData->bJPEGhasheader) && (pData->bJPEGdecostarted) &&
- (!pData->bJPEGscanending) && (jpeg_input_complete (pData->pJPEGdinfo)) &&
- (pData->pJPEGdinfo->input_scan_number == pData->pJPEGdinfo->output_scan_number))
- {
- /* jpeg_finish_decompress(...); */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_FINISH_DECOMPRESS)
-#endif
- if (jpeg_finish_decompress (pData->pJPEGdinfo) == TRUE)
- { /* indicate it's done */
- pData->bJPEGhasheader = MNG_FALSE;
- pData->bJPEGdecostarted = MNG_FALSE;
- pData->pJPEGcurrent = (mng_uint8p)pData->pJPEGdinfo->src->next_input_byte;
- pData->iJPEGbufremain = (mng_uint32)pData->pJPEGdinfo->src->bytes_in_buffer;
- /* remaining fluff is an error ! */
- if ((pData->iJPEGbufremain > 0) || (iRemain > 0))
- MNG_ERROR (pData, MNG_TOOMUCHJDAT);
- }
- }
-#endif /* MNG_INCLUDE_IJG6B */
- }
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_END);
-#endif
-
- return MNG_NOERROR;
-}
-#endif /* MNG_INCLUDE_JNG_READ */
-
-/* ************************************************************************** */
-
-#ifdef MNG_INCLUDE_JNG_READ
-mng_retcode mngjpeg_decompressfree (mng_datap pData)
-{
-#if defined(MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
- mng_retcode iRetcode;
-#endif
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSFREE, MNG_LC_START);
-#endif
-
-#ifdef MNG_INCLUDE_IJG6B
-#ifdef MNG_USE_SETJMP
- iRetcode = setjmp (pData->sErrorbuf);/* setup local JPEG error-recovery */
- if (iRetcode != 0) /* got here from longjmp ? */
- MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
-#endif
- /* free the row of JPEG-samples*/
- MNG_FREE (pData, pData->pJPEGrow, pData->iJPEGrowlen);
-
- /* release the JPEG decompression object */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSFREE, MNG_LC_JPEG_DESTROY_DECOMPRESS)
-#endif
- jpeg_destroy_decompress (pData->pJPEGdinfo);
-
- pData->bJPEGdecompress = MNG_FALSE; /* indicate it's done */
-
-#endif /* MNG_INCLUDE_IJG6B */
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSFREE, MNG_LC_END);
-#endif
-
- return MNG_NOERROR;
-}
-#endif /* MNG_INCLUDE_JNG_READ */
-
-/* ************************************************************************** */
-/* * * */
-/* * JPEG decompression routines (JDAA) * */
-/* * * */
-/* ************************************************************************** */
-
-#ifdef MNG_INCLUDE_JNG_READ
-mng_retcode mngjpeg_decompressinit2 (mng_datap pData)
-{
-#if defined(MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
- mng_retcode iRetcode;
-#endif
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSINIT, MNG_LC_START);
-#endif
-
-#ifdef MNG_INCLUDE_IJG6B
- /* allocate and initialize a JPEG decompression object */
- pData->pJPEGdinfo2->err = jpeg_std_error (pData->pJPEGderr2);
-
-#ifdef MNG_USE_SETJMP /* setup local JPEG error-routines */
- pData->pJPEGderr2->error_exit = mng_error_exit;
- pData->pJPEGderr2->output_message = mng_output_message;
-
- iRetcode = setjmp (pData->sErrorbuf);/* setup local JPEG error-recovery */
- if (iRetcode != 0) /* got here from longjmp ? */
- MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
-#endif /* MNG_USE_SETJMP */
-
- /* allocate and initialize a JPEG decompression object (continued) */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSINIT, MNG_LC_JPEG_CREATE_DECOMPRESS)
-#endif
- jpeg_create_decompress (pData->pJPEGdinfo2);
-
- pData->bJPEGdecompress2 = MNG_TRUE; /* indicate it's initialized */
-
- /* specify the source of the compressed data (eg, a file) */
- /* no, not a file; we have buffered input */
- pData->pJPEGdinfo2->src = pData->pJPEGdsrc2;
- /* use the default handler */
- pData->pJPEGdinfo2->src->resync_to_restart = jpeg_resync_to_restart;
- /* setup local source routine & parms */
- pData->pJPEGdinfo2->src->init_source = mng_init_source;
- pData->pJPEGdinfo2->src->fill_input_buffer = mng_fill_input_buffer;
- pData->pJPEGdinfo2->src->skip_input_data = mng_skip_input_data2;
- pData->pJPEGdinfo2->src->term_source = mng_term_source;
- pData->pJPEGdinfo2->src->next_input_byte = pData->pJPEGcurrent2;
- pData->pJPEGdinfo2->src->bytes_in_buffer = pData->iJPEGbufremain2;
-
-#endif /* MNG_INCLUDE_IJG6B */
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSINIT, MNG_LC_END);
-#endif
-
- return MNG_NOERROR;
-}
-#endif /* MNG_INCLUDE_JNG_READ */
-
-/* ************************************************************************** */
-
-#ifdef MNG_INCLUDE_JNG_READ
-mng_retcode mngjpeg_decompressdata2 (mng_datap pData,
- mng_uint32 iRawsize,
- mng_uint8p pRawdata)
-{
- mng_retcode iRetcode;
- mng_uint32 iRemain;
- mng_uint8p pWork;
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_START);
-#endif
-
-#if defined (MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
- iRetcode = setjmp (pData->sErrorbuf);/* initialize local JPEG error-recovery */
- if (iRetcode != 0) /* got here from longjmp ? */
- MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
-#endif
-
- pWork = pRawdata;
- iRemain = iRawsize;
-
- if (pData->iJPEGtoskip2) /* JPEG-lib told us to skip some more data ? */
- {
- if (iRemain > pData->iJPEGtoskip2) /* enough data in this buffer ? */
- {
- iRemain -= pData->iJPEGtoskip2; /* skip enough to access the next byte */
- pWork += pData->iJPEGtoskip2;
-
- pData->iJPEGtoskip2 = 0; /* no more to skip then */
- }
- else
- {
- pData->iJPEGtoskip2 -= iRemain; /* skip all data in the buffer */
- iRemain = 0; /* and indicate this accordingly */
- }
- /* the skip set current-pointer to NULL ! */
- pData->pJPEGcurrent2 = pData->pJPEGbuf2;
- }
-
- while (iRemain) /* repeat until no more input-bytes */
- { /* need to shift anything ? */
- if ((pData->pJPEGcurrent2 > pData->pJPEGbuf2) &&
- (pData->pJPEGcurrent2 - pData->pJPEGbuf2 + pData->iJPEGbufremain2 + iRemain > pData->iJPEGbufmax2))
- {
- if (pData->iJPEGbufremain2 > 0) /* then do so */
- MNG_COPY (pData->pJPEGbuf2, pData->pJPEGcurrent2, pData->iJPEGbufremain2);
-
- pData->pJPEGcurrent2 = pData->pJPEGbuf2;
- }
- /* does the remaining input fit into the buffer ? */
- if (pData->iJPEGbufremain2 + iRemain <= pData->iJPEGbufmax2)
- { /* move the lot */
- MNG_COPY ((pData->pJPEGcurrent2 + pData->iJPEGbufremain2), pWork, iRemain);
- /* adjust remaining_bytes counter */
- pData->iJPEGbufremain2 += iRemain;
- iRemain = 0; /* and indicate there's no input left */
- }
- else
- { /* calculate what does fit */
- mng_uint32 iFits = pData->iJPEGbufmax2 - pData->iJPEGbufremain2;
-
- if (iFits <= 0) /* no space is just bugger 'm all */
- MNG_ERROR (pData, MNG_JPEGBUFTOOSMALL);
- /* move that */
- MNG_COPY ((pData->pJPEGcurrent2 + pData->iJPEGbufremain2), pWork, iFits);
-
- pData->iJPEGbufremain2 += iFits; /* adjust remain_bytes counter */
- iRemain -= iFits; /* and the input-parms */
- pWork += iFits;
- }
-
-#ifdef MNG_INCLUDE_IJG6B
- pData->pJPEGdinfo2->src->next_input_byte = pData->pJPEGcurrent2;
- pData->pJPEGdinfo2->src->bytes_in_buffer = pData->iJPEGbufremain2;
-
- if (!pData->bJPEGhasheader2) /* haven't got the header yet ? */
- {
- /* call jpeg_read_header() to obtain image info */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_READ_HEADER)
-#endif
- if (jpeg_read_header (pData->pJPEGdinfo2, TRUE) != JPEG_SUSPENDED)
- { /* indicate the header's oke */
- pData->bJPEGhasheader2 = MNG_TRUE;
- /* let's do some sanity checks ! */
- if ((pData->pJPEGdinfo2->image_width != pData->iDatawidth ) ||
- (pData->pJPEGdinfo2->image_height != pData->iDataheight) )
- MNG_ERROR (pData, MNG_JPEGPARMSERR);
-
- if (pData->pJPEGdinfo2->jpeg_color_space != JCS_GRAYSCALE)
- MNG_ERROR (pData, MNG_JPEGPARMSERR);
- /* indicate whether or not it's progressive */
- pData->bJPEGprogressive2 = (mng_bool)jpeg_has_multiple_scans (pData->pJPEGdinfo2);
-
- if (pData->bJPEGprogressive2) /* progressive alphachannel not allowed !!! */
- MNG_ERROR (pData, MNG_JPEGPARMSERR);
- /* allocate a row of JPEG-samples */
- if (pData->pJPEGdinfo2->jpeg_color_space == JCS_YCbCr)
- pData->iJPEGrowlen2 = pData->pJPEGdinfo2->image_width * RGB_PIXELSIZE;
- else
- pData->iJPEGrowlen2 = pData->pJPEGdinfo2->image_width;
-
- MNG_ALLOC (pData, pData->pJPEGrow2, pData->iJPEGrowlen2);
-
- pData->iJPEGalpharow = 0; /* quite empty up to now */
- }
-
- pData->pJPEGcurrent2 = (mng_uint8p)pData->pJPEGdinfo2->src->next_input_byte;
- pData->iJPEGbufremain2 = (mng_uint32)pData->pJPEGdinfo2->src->bytes_in_buffer;
- }
- /* decompress not started ? */
- if ((pData->bJPEGhasheader2) && (!pData->bJPEGdecostarted2))
- {
- /* set parameters for decompression */
-
- if (pData->bJPEGprogressive2) /* progressive display ? */
- pData->pJPEGdinfo2->buffered_image = TRUE;
-
- /* jpeg_start_decompress(...); */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_START_DECOMPRESS)
-#endif
- if (jpeg_start_decompress (pData->pJPEGdinfo2) == TRUE)
- /* indicate it started */
- pData->bJPEGdecostarted2 = MNG_TRUE;
-
- pData->pJPEGcurrent2 = (mng_uint8p)pData->pJPEGdinfo2->src->next_input_byte;
- pData->iJPEGbufremain2 = (mng_uint32)pData->pJPEGdinfo2->src->bytes_in_buffer;
- }
- /* process some scanlines ? */
- if ((pData->bJPEGhasheader2) && (pData->bJPEGdecostarted2) &&
- ((!jpeg_input_complete (pData->pJPEGdinfo2)) ||
- (pData->pJPEGdinfo2->output_scanline < pData->pJPEGdinfo2->output_height)))
- {
- mng_int32 iLines;
-
- /* for (each output pass) */
- do
- { /* address the row output buffer */
- JSAMPROW pRow = (JSAMPROW)pData->pJPEGrow2;
-
- /* init new pass ? */
- if ((pData->bJPEGprogressive2) &&
- ((!pData->bJPEGscanstarted2) ||
- (pData->pJPEGdinfo2->output_scanline >= pData->pJPEGdinfo2->output_height)))
- {
- pData->bJPEGscanstarted2 = MNG_TRUE;
-
- /* adjust output decompression parameters if required */
- /* nop */
-
- /* start a new output pass */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_START_OUTPUT)
-#endif
- jpeg_start_output (pData->pJPEGdinfo2, pData->pJPEGdinfo2->input_scan_number);
-
- pData->iJPEGrow = 0; /* start at row 0 in the image again */
- }
-
- /* while (scan lines remain to be read) */
- do
- {
- /* jpeg_read_scanlines(...); */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_READ_SCANLINES)
-#endif
- iLines = jpeg_read_scanlines (pData->pJPEGdinfo2, (JSAMPARRAY)&pRow, 1);
-
- pData->pJPEGcurrent2 = (mng_uint8p)pData->pJPEGdinfo2->src->next_input_byte;
- pData->iJPEGbufremain2 = (mng_uint32)pData->pJPEGdinfo2->src->bytes_in_buffer;
-
- if (iLines > 0) /* got something ? */
- {
- if (pData->fStorerow3) /* store in object ? */
- {
- iRetcode = ((mng_storerow)pData->fStorerow3) (pData);
-
- if (iRetcode) /* on error bail out */
- return iRetcode;
-
- }
- }
- }
- while ((pData->pJPEGdinfo2->output_scanline < pData->pJPEGdinfo2->output_height) &&
- (iLines > 0)); /* until end-of-image or not enough input-data */
-
- /* terminate output pass */
- if ((pData->bJPEGprogressive2) &&
- (pData->pJPEGdinfo2->output_scanline >= pData->pJPEGdinfo2->output_height))
- {
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_FINISH_OUTPUT)
-#endif
- if (jpeg_finish_output (pData->pJPEGdinfo2) == JPEG_SUSPENDED)
- jpeg_finish_output (pData->pJPEGdinfo2);
- /* this scan has ended */
- pData->bJPEGscanstarted2 = MNG_FALSE;
- }
- }
- while ((!jpeg_input_complete (pData->pJPEGdinfo2)) && (iLines > 0));
- }
- /* end of image ? */
- if ((pData->bJPEGhasheader2) && (pData->bJPEGdecostarted2) &&
- (jpeg_input_complete (pData->pJPEGdinfo2)) &&
- (pData->pJPEGdinfo2->input_scan_number == pData->pJPEGdinfo2->output_scan_number))
- {
- /* jpeg_finish_decompress(...); */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_JPEG_FINISH_DECOMPRESS)
-#endif
- if (jpeg_finish_decompress (pData->pJPEGdinfo2) == TRUE)
- { /* indicate it's done */
- pData->bJPEGhasheader2 = MNG_FALSE;
- pData->bJPEGdecostarted2 = MNG_FALSE;
- pData->pJPEGcurrent2 = (mng_uint8p)pData->pJPEGdinfo2->src->next_input_byte;
- pData->iJPEGbufremain2 = (mng_uint32)pData->pJPEGdinfo2->src->bytes_in_buffer;
- /* remaining fluff is an error ! */
- if ((pData->iJPEGbufremain2 > 0) || (iRemain > 0))
- MNG_ERROR (pData, MNG_TOOMUCHJDAT);
- }
- }
-#endif /* MNG_INCLUDE_IJG6B */
- }
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSDATA, MNG_LC_END);
-#endif
-
- return MNG_NOERROR;
-}
-#endif /* MNG_INCLUDE_JNG_READ */
-
-/* ************************************************************************** */
-
-#ifdef MNG_INCLUDE_JNG_READ
-mng_retcode mngjpeg_decompressfree2 (mng_datap pData)
-{
-#if defined(MNG_INCLUDE_IJG6B) && defined(MNG_USE_SETJMP)
- mng_retcode iRetcode;
-#endif
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSFREE, MNG_LC_START);
-#endif
-
-#ifdef MNG_INCLUDE_IJG6B
-#ifdef MNG_USE_SETJMP
- iRetcode = setjmp (pData->sErrorbuf);/* setup local JPEG error-recovery */
- if (iRetcode != 0) /* got here from longjmp ? */
- MNG_ERRORJ (pData, iRetcode); /* then IJG-lib issued an error */
-#endif
- /* free the row of JPEG-samples*/
- MNG_FREE (pData, pData->pJPEGrow2, pData->iJPEGrowlen2);
-
- /* release the JPEG decompression object */
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSFREE, MNG_LC_JPEG_DESTROY_DECOMPRESS)
-#endif
- jpeg_destroy_decompress (pData->pJPEGdinfo2);
-
- pData->bJPEGdecompress2 = MNG_FALSE; /* indicate it's done */
-
-#endif /* MNG_INCLUDE_IJG6B */
-
-#ifdef MNG_SUPPORT_TRACE
- MNG_TRACE (pData, MNG_FN_JPEG_DECOMPRESSFREE, MNG_LC_END);
-#endif
-
- return MNG_NOERROR;
-}
-#endif /* MNG_INCLUDE_JNG_READ */
-
-/* ************************************************************************** */
-
-#endif /* MNG_INCLUDE_JNG && MNG_INCLUDE_DISPLAY_PROCS */
-
-/* ************************************************************************** */
-/* * end of file * */
-/* ************************************************************************** */
-
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