📄 libmng_callback_xs.c
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/* ************************************************************************** */
/* * For conditions of distribution and use, * */
/* * see copyright notice in libmng.h * */
/* ************************************************************************** */
/* * * */
/* * project : libmng * */
/* * file : libmng_callback_xs.c copyright (c) 2000-2004 G.Juyn * */
/* * version : 1.0.8 * */
/* * * */
/* * purpose : callback get/set interface (implementation) * */
/* * * */
/* * author : G.Juyn * */
/* * * */
/* * comment : implementation of the callback get/set functions * */
/* * * */
/* * changes : 0.5.1 - 05/08/2000 - G.Juyn * */
/* * - fixed calling convention * */
/* * - changed strict-ANSI stuff * */
/* * 0.5.1 - 05/12/2000 - G.Juyn * */
/* * - changed trace to macro for callback error-reporting * */
/* * * */
/* * 0.5.2 - 05/31/2000 - G.Juyn * */
/* * - fixed up punctuation (contribution by Tim Rowley) * */
/* * 0.5.2 - 06/02/2000 - G.Juyn * */
/* * - added getalphaline callback for RGB8_A8 canvasstyle * */
/* * * */
/* * 0.9.1 - 07/15/2000 - G.Juyn * */
/* * - added callbacks for SAVE/SEEK processing * */
/* * * */
/* * 0.9.2 - 08/05/2000 - G.Juyn * */
/* * - changed file-prefixes * */
/* * * */
/* * 0.9.3 - 10/11/2000 - G.Juyn * */
/* * - added support for nEED * */
/* * 0.9.3 - 10/17/2000 - G.Juyn * */
/* * - added callback to process non-critical unknown chunks * */
/* * * */
/* * 1.0.1 - 02/08/2001 - G.Juyn * */
/* * - added MEND processing callback * */
/* * * */
/* * 1.0.2 - 06/23/2001 - G.Juyn * */
/* * - added processterm callback * */
/* * * */
/* * 1.0.6 - 07/07/2003 - G. R-P * */
/* * - added SKIPCHUNK feature * */
/* * * */
/* * 1.0.7 - 03/10/2004 - G.R-P * */
/* * - added conditionals around openstream/closestream * */
/* * 1.0.7 - 03/19/2004 - G.R-P * */
/* * - fixed typo (MNG_SKIPCHUNK_SAVE -> MNG_SKIPCHUNK_nEED * */
/* * * */
/* * 1.0.8 - 04/10/2004 - G.Juyn * */
/* * - added data-push mechanisms for specialized decoders * */
/* * * */
/* ************************************************************************** */
#include "libmng.h"
#include "libmng_data.h"
#include "libmng_error.h"
#include "libmng_trace.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif
#if defined(__BORLANDC__) && defined(MNG_STRICT_ANSI)
#pragma option -A /* force ANSI-C */
#endif
/* ************************************************************************** */
/* * * */
/* * Callback set functions * */
/* * * */
/* ************************************************************************** */
#ifndef MNG_INTERNAL_MEMMNGMT
mng_retcode MNG_DECL mng_setcb_memalloc (mng_handle hHandle,
mng_memalloc fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_MEMALLOC, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fMemalloc = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_MEMALLOC, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif /* MNG_INTERNAL_MEMMNGMT */
/* ************************************************************************** */
#ifndef MNG_INTERNAL_MEMMNGMT
mng_retcode MNG_DECL mng_setcb_memfree (mng_handle hHandle,
mng_memfree fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_MEMFREE, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fMemfree = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_MEMFREE, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif /* MNG_INTERNAL_MEMMNGMT */
/* ************************************************************************** */
#ifdef MNG_SUPPORT_READ
mng_retcode MNG_DECL mng_setcb_releasedata (mng_handle hHandle,
mng_releasedata fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_RELEASEDATA, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fReleasedata = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_RELEASEDATA, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif /* MNG_SUPPORT_READ */
/* ************************************************************************** */
#if defined(MNG_SUPPORT_READ) || defined(MNG_SUPPORT_WRITE)
#ifndef MNG_NO_OPEN_CLOSE_STREAM
mng_retcode MNG_DECL mng_setcb_openstream (mng_handle hHandle,
mng_openstream fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_OPENSTREAM, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fOpenstream = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_OPENSTREAM, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif
#endif /* MNG_SUPPORT_READ || MNG_SUPPORT_WRITE */
/* ************************************************************************** */
#if defined(MNG_SUPPORT_READ) || defined(MNG_SUPPORT_WRITE)
#ifndef MNG_NO_OPEN_CLOSE_STREAM
mng_retcode MNG_DECL mng_setcb_closestream (mng_handle hHandle,
mng_closestream fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_CLOSESTREAM, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fClosestream = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_CLOSESTREAM, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif
#endif /* MNG_SUPPORT_READ || MNG_SUPPORT_WRITE */
/* ************************************************************************** */
#ifdef MNG_SUPPORT_READ
mng_retcode MNG_DECL mng_setcb_readdata (mng_handle hHandle,
mng_readdata fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_READDATA, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fReaddata = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_READDATA, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif /* MNG_SUPPORT_READ */
/* ************************************************************************** */
#ifdef MNG_SUPPORT_WRITE
mng_retcode MNG_DECL mng_setcb_writedata (mng_handle hHandle,
mng_writedata fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_WRITEDATA, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fWritedata = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_WRITEDATA, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif /* MNG_SUPPORT_WRITE */
/* ************************************************************************** */
mng_retcode MNG_DECL mng_setcb_errorproc (mng_handle hHandle,
mng_errorproc fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_ERRORPROC, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fErrorproc = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_ERRORPROC, MNG_LC_END)
#endif
return MNG_NOERROR;
}
/* ************************************************************************** */
#ifdef MNG_SUPPORT_TRACE
mng_retcode MNG_DECL mng_setcb_traceproc (mng_handle hHandle,
mng_traceproc fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_TRACEPROC, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fTraceproc = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_TRACEPROC, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif /* MNG_SUPPORT_TRACE */
/* ************************************************************************** */
#ifdef MNG_SUPPORT_READ
mng_retcode MNG_DECL mng_setcb_processheader (mng_handle hHandle,
mng_processheader fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_PROCESSHEADER, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fProcessheader = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_PROCESSHEADER, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif /* MNG_SUPPORT_READ */
/* ************************************************************************** */
#ifdef MNG_SUPPORT_READ
#ifndef MNG_SKIPCHUNK_tEXt
mng_retcode MNG_DECL mng_setcb_processtext (mng_handle hHandle,
mng_processtext fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_PROCESSTEXT, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fProcesstext = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_PROCESSTEXT, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif
#endif /* MNG_SUPPORT_READ */
/* ************************************************************************** */
#ifdef MNG_SUPPORT_READ
#ifndef MNG_SKIPCHUNK_SAVE
mng_retcode MNG_DECL mng_setcb_processsave (mng_handle hHandle,
mng_processsave fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_PROCESSSAVE, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fProcesssave = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_PROCESSSAVE, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif
#endif /* MNG_SUPPORT_READ */
/* ************************************************************************** */
#ifdef MNG_SUPPORT_READ
#ifndef MNG_SKIPCHUNK_SEEK
mng_retcode MNG_DECL mng_setcb_processseek (mng_handle hHandle,
mng_processseek fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_PROCESSSEEK, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fProcessseek = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_PROCESSSEEK, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif
#endif /* MNG_SUPPORT_READ */
/* ************************************************************************** */
#ifdef MNG_SUPPORT_READ
#ifndef MNG_SKIPCHUNK_nEED
mng_retcode MNG_DECL mng_setcb_processneed (mng_handle hHandle,
mng_processneed fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_PROCESSNEED, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fProcessneed = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_PROCESSNEED, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif
#endif /* MNG_SUPPORT_READ */
/* ************************************************************************** */
#ifdef MNG_SUPPORT_READ
mng_retcode MNG_DECL mng_setcb_processmend (mng_handle hHandle,
mng_processmend fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_PROCESSMEND, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fProcessmend = fProc;
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_PROCESSMEND, MNG_LC_END)
#endif
return MNG_NOERROR;
}
#endif /* MNG_SUPPORT_READ */
/* ************************************************************************** */
#ifdef MNG_SUPPORT_READ
mng_retcode MNG_DECL mng_setcb_processunknown (mng_handle hHandle,
mng_processunknown fProc)
{
#ifdef MNG_SUPPORT_TRACE
MNG_TRACE (((mng_datap)hHandle), MNG_FN_SETCB_PROCESSUNKNOWN, MNG_LC_START)
#endif
MNG_VALIDHANDLE (hHandle)
((mng_datap)hHandle)->fProcessunknown = fProc;
#ifdef MNG_SUPPORT_TRACE
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