/* ************************************************************************** */ | |
/* * 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 * */ | |
/* ************************************************************************** */ | |