libmng_object_prc.c

奇趣公司比较新的qt/emd版本

/* ************************************************************************** */
/* *             For conditions of distribution and use,                    * */
/* *                see copyright notice in libmng.h                        * */
/* ************************************************************************** */
/* *                                                                        * */
/* * project   : libmng                                                     * */
/* * file      : libmng_object_prc.c       copyright (c) 2000-2004 G.Juyn   * */
/* * version   : 1.0.9                                                      * */
/* *                                                                        * */
/* * purpose   : Object processing routines (implementation)                * */
/* *                                                                        * */
/* * author    : G.Juyn                                                     * */
/* *                                                                        * */
/* * comment   : implementation of the internal object processing routines  * */
/* *                                                                        * */
/* * changes   : 0.5.1 - 05/08/2000 - G.Juyn                                * */
/* *             - changed strict-ANSI stuff                                * */
/* *             0.5.1 - 05/12/2000 - G.Juyn                                * */
/* *             - changed trace to macro for callback error-reporting      * */
/* *                                                                        * */
/* *             0.5.2 - 05/20/2000 - G.Juyn                                * */
/* *             - fixed to support JNG objects                             * */
/* *             0.5.2 - 05/24/2000 - G.Juyn                                * */
/* *             - added support for global color-chunks in animation       * */
/* *             - added support for global PLTE,tRNS,bKGD in animation     * */
/* *             - added SAVE & SEEK animation objects                      * */
/* *             0.5.2 - 05/29/2000 - G.Juyn                                * */
/* *             - added initialization of framenr/layernr/playtime         * */
/* *             - changed ani_object create routines not to return the     * */
/* *               created object (wasn't necessary)                        * */
/* *             0.5.2 - 05/30/2000 - G.Juyn                                * */
/* *             - added object promotion routine (PROM handling)           * */
/* *             - added ani-object routines for delta-image processing     * */
/* *             - added compression/filter/interlace fields to             * */
/* *               object-buffer for delta-image processing                 * */
/* *                                                                        * */
/* *             0.5.3 - 06/17/2000 - G.Juyn                                * */
/* *             - changed support for delta-image processing               * */
/* *             0.5.3 - 06/20/2000 - G.Juyn                                * */
/* *             - fixed some small things (as precaution)                  * */
/* *             0.5.3 - 06/21/2000 - G.Juyn                                * */
/* *             - added processing of PLTE/tRNS & color-info for           * */
/* *               delta-images in the ani_objects chain                    * */
/* *             0.5.3 - 06/22/2000 - G.Juyn                                * */
/* *             - added support for PPLT chunk                             * */
/* *                                                                        * */
/* *             0.9.1 - 07/07/2000 - G.Juyn                                * */
/* *             - added support for freeze/restart/resume & go_xxxx        * */
/* *             0.9.1 - 07/16/2000 - G.Juyn                                * */
/* *             - fixed support for mng_display() after mng_read()         * */
/* *                                                                        * */
/* *             0.9.2 - 07/29/2000 - G.Juyn                                * */
/* *             - fixed small bugs in display processing                   * */
/* *             0.9.2 - 08/05/2000 - G.Juyn                                * */
/* *             - changed file-prefixes                                    * */
/* *                                                                        * */
/* *             0.9.3 - 08/07/2000 - G.Juyn                                * */
/* *             - B111300 - fixup for improved portability                 * */
/* *             0.9.3 - 08/26/2000 - G.Juyn                                * */
/* *             - added MAGN chunk                                         * */
/* *             0.9.3 - 09/10/2000 - G.Juyn                                * */
/* *             - fixed DEFI behavior                                      * */
/* *             0.9.3 - 10/17/2000 - G.Juyn                                * */
/* *             - added valid-flag to stored objects for read() / display()* */
/* *             - added routine to discard "invalid" objects               * */
/* *             0.9.3 - 10/18/2000 - G.Juyn                                * */
/* *             - fixed delta-processing behavior                          * */
/* *             0.9.3 - 10/19/2000 - G.Juyn                                * */
/* *             - added storage for pixel-/alpha-sampledepth for delta's   * */
/* *                                                                        * */
/* *             0.9.4 -  1/18/2001 - G.Juyn                                * */
/* *             - removed "old" MAGN methods 3 & 4                         * */
/* *             - added "new" MAGN methods 3, 4 & 5                        * */
/* *                                                                        * */
/* *             0.9.5 -  1/22/2001 - G.Juyn                                * */
/* *             - B129681 - fixed compiler warnings SGI/Irix               * */
/* *                                                                        * */
/* *             1.0.2 - 06/23/2001 - G.Juyn                                * */
/* *             - added optimization option for MNG-video playback         * */
/* *                                                                        * */
/* *             1.0.5 - 08/15/2002 - G.Juyn                                * */
/* *             - completed PROM support                                   * */
/* *             1.0.5 - 08/16/2002 - G.Juyn                                * */
/* *             - completed MAGN support (16-bit functions)                * */
/* *             1.0.5 - 08/19/2002 - G.Juyn                                * */
/* *             - B597134 - libmng pollutes the linker namespace           * */
/* *             1.0.5 - 09/13/2002 - G.Juyn                                * */
/* *             - fixed read/write of MAGN chunk                           * */
/* *             1.0.5 - 09/15/2002 - G.Juyn                                * */
/* *             - added event handling for dynamic MNG                     * */
/* *             1.0.5 - 09/20/2002 - G.Juyn                                * */
/* *             - added support for PAST                                   * */
/* *             1.0.5 - 09/23/2002 - G.Juyn                                * */
/* *             - fixed reset_object_detail to clear old buffer            * */
/* *             - added in-memory color-correction of abstract images      * */
/* *             1.0.5 - 10/05/2002 - G.Juyn                                * */
/* *             - fixed problem with cloned objects marked as invalid      * */
/* *             - fixed problem cloning frozen object_buffers              * */
/* *             1.0.5 - 10/07/2002 - G.Juyn                                * */
/* *             - fixed DISC support                                       * */
/* *             1.0.5 - 11/04/2002 - G.Juyn                                * */
/* *             - fixed goframe/golayer/gotime processing                  * */
/* *             1.0.5 - 11/07/2002 - G.Juyn                                * */
/* *             - fixed magnification bug with object 0                    * */
/* *             1.0.5 - 01/19/2003 - G.Juyn                                * */
/* *             - B664911 - fixed buffer overflow during init              * */
/* *                                                                        * */
/* *             1.0.6 - 04/19/2003 - G.Juyn                                * */
/* *             - fixed problem with infinite loops during readdisplay()   * */
/* *             1.0.6 - 05/25/2003 - G.R-P                                 * */
/* *             - added MNG_SKIPCHUNK_cHNK footprint optimizations         * */
/* *             1.0.6 - 06/09/2003 - G. R-P                                * */
/* *             - added conditionals around 8-bit magn routines            * */
/* *             1.0.6 - 07/07/2003 - G.R-P                                 * */
/* *             - added conditionals around some JNG-supporting code       * */
/* *             - removed conditionals around 8-bit magn routines          * */
/* *             - added conditionals around delta-png and 16-bit code      * */
/* *             1.0.6 - 07/14/2003 - G.R-P                                 * */
/* *             - added MNG_NO_LOOP_SIGNALS_SUPPORTED conditional          * */
/* *             1.0.6 - 07/29/2003 - G.Juyn                                * */
/* *             - fixed invalid test in promote_imageobject                * */
/* *             1.0.6 - 07/29/2003 - G.R-P.                                * */
/* *             - added conditionals around PAST chunk support             * */
/* *             1.0.6 - 08/17/2003 - G.R-P.                                * */
/* *             - added conditionals around MAGN chunk support             * */
/* *                                                                        * */
/* *             1.0.7 - 03/21/2004 - G.Juyn                                * */
/* *             - fixed some 64-bit platform compiler warnings             * */
/* *                                                                        * */
/* *             1.0.9 - 10/10/2004 - G.R-P.                                * */
/* *             - added MNG_NO_1_2_4BIT_SUPPORT support                    * */
/* *             1.0.9 - 12/05/2004 - G.Juyn                                * */
/* *             - added conditional MNG_OPTIMIZE_OBJCLEANUP                * */
/* *             1.0.9 - 12/11/2004 - G.Juyn                                * */
/* *             - added conditional MNG_OPTIMIZE_DISPLAYCALLS              * */
/* *             1.0.9 - 12/31/2004 - G.R-P.                                * */
/* *             - fixed warnings about possible uninitialized pointers     * */
/* *             1.0.9 - 01/02/2005 - G.Juyn                                * */
/* *             - fixing some compiler-warnings                            * */
/* *                                                                        * */
/* ************************************************************************** */

#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_chunks.h"
#include "libmng_objects.h"
#include "libmng_display.h"
#include "libmng_pixels.h"
#include "libmng_object_prc.h"
#include "libmng_cms.h"

#if defined(__BORLANDC__) && defined(MNG_STRICT_ANSI)
#pragma option -A                      /* force ANSI-C */
#endif

/* ************************************************************************** */

#ifdef MNG_INCLUDE_DISPLAY_PROCS

/* ************************************************************************** */
/* *                                                                        * */
/* * Generic object routines                                                * */
/* *                                                                        * */
/* ************************************************************************** */

mng_retcode mng_drop_invalid_objects (mng_datap pData)
{
  mng_objectp       pObject;
  mng_objectp       pNext;
  mng_cleanupobject fCleanup;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_DROP_INVALID_OBJECTS, MNG_LC_START);
#endif

  pObject = pData->pFirstimgobj;       /* get first stored image-object (if any) */

  while (pObject)                      /* more objects to check ? */
  {
    pNext = ((mng_object_headerp)pObject)->pNext;
                                       /* invalid ? */
    if (!((mng_imagep)pObject)->bValid)
    {                                  /* call appropriate cleanup */
      fCleanup = ((mng_object_headerp)pObject)->fCleanup;
      fCleanup (pData, pObject);
    }

    pObject = pNext;                   /* neeeext */
  }

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_DROP_INVALID_OBJECTS, MNG_LC_END);
#endif

  return MNG_NOERROR;
}

/* ************************************************************************** */

#ifdef MNG_OPTIMIZE_OBJCLEANUP
MNG_LOCAL mng_retcode create_obj_general (mng_datap          pData,
                                          mng_size_t         iObjsize,
                                          mng_cleanupobject  fCleanup,
                                          mng_processobject  fProcess,
                                          mng_ptr            *ppObject)
{
  mng_object_headerp pWork;

  MNG_ALLOC (pData, pWork, iObjsize);

  pWork->fCleanup = fCleanup;
  pWork->fProcess = fProcess;
  pWork->iObjsize = iObjsize;
  *ppObject       = (mng_ptr)pWork;

  return MNG_NOERROR;
}

/* ************************************************************************** */

MNG_LOCAL mng_retcode mng_free_obj_general (mng_datap   pData,
                                            mng_objectp pObject)
{
  MNG_FREEX (pData, pObject, ((mng_object_headerp)pObject)->iObjsize);
  return MNG_NOERROR;
}
#endif

/* ************************************************************************** */
/* *                                                                        * */
/* * Image-data-object routines                                             * */
/* *                                                                        * */
/* * these handle the "object buffer" as defined by the MNG specification   * */
/* *                                                                        * */
/* ************************************************************************** */

mng_retcode mng_create_imagedataobject (mng_datap      pData,
                                        mng_bool       bConcrete,
                                        mng_bool       bViewable,
                                        mng_uint32     iWidth,
                                        mng_uint32     iHeight,
                                        mng_uint8      iBitdepth,
                                        mng_uint8      iColortype,
                                        mng_uint8      iCompression,
                                        mng_uint8      iFilter,
                                        mng_uint8      iInterlace,
                                        mng_imagedatap *ppObject)
{
  mng_ptr pTemp;
  mng_imagedatap pImagedata;
  mng_uint32 iSamplesize = 0;

#ifdef MNG_SUPPORT_TRACE
  MNG_TRACE (pData, MNG_FN_CREATE_IMGDATAOBJECT, MNG_LC_START);
#endif
                                       /* get a buffer */
#ifdef MNG_OPTIMIZE_OBJCLEANUP
  {
    mng_retcode iRetcode = create_obj_general (pData, sizeof (mng_imagedata),
                                               (mng_cleanupobject)mng_free_imagedataobject,
                                               MNG_NULL, &pTemp);
    if (iRetcode)
      return iRetcode;
    pImagedata = (mng_imagedatap)pTemp;
  }
#else
  MNG_ALLOC (pData, pImagedata, sizeof (mng_imagedata));
                                       /* fill the appropriate fields */
  pImagedata->sHeader.fCleanup   = (mng_cleanupobject)mng_free_imagedataobject;
  pImagedata->sHeader.fProcess   = MNG_NULL;
#endif
  pImagedata->iRefcount          = 1;
  pImagedata->bFrozen            = MNG_FALSE;
  pImagedata->bConcrete          = bConcrete;
  pImagedata->bViewable          = bViewable;
  pImagedata->iWidth             = iWidth;
  pImagedata->iHeight            = iHeight;
  pImagedata->iBitdepth          = iBitdepth;
  pImagedata->iColortype         = iColortype;
  pImagedata->iCompression       = iCompression;
  pImagedata->iFilter            = iFilter;
  pImagedata->iInterlace         = iInterlace;
  pImagedata->bCorrected         = MNG_FALSE;
  pImagedata->iAlphabitdepth     = 0;
  pImagedata->iJHDRcompression   = 0;
  pImagedata->iJHDRinterlace     = 0;
  pImagedata->iPixelsampledepth  = iBitdepth;
  pImagedata->iAlphasampledepth  = iBitdepth;
                                       /* determine samplesize from color_type/bit_depth */
  switch (iColortype)                  /* for < 8-bit samples we just reserve 8 bits */
  {
    case  0  : ;                       /* gray */
    case  8  : {                       /* JPEG gray */
#ifndef MNG_NO_16BIT_SUPPORT
                 if (iBitdepth > 8)
                   iSamplesize = 2;
                 else
#endif
                   iSamplesize = 1;

                 break;
               }
    case  2  : ;                       /* rgb */
    case 10  : {                       /* JPEG rgb */
#ifndef MNG_NO_16BIT_SUPPORT
                 if (iBitdepth > 8)
                   iSamplesize = 6;
                 else
#endif
                   iSamplesize = 3;

                 break;
               }
    case  3  : {                       /* indexed */
                 iSamplesize = 1;
                 break;
               }
    case  4  : ;                       /* gray+alpha */
    case 12  : {                       /* JPEG gray+alpha */
#ifndef MNG_NO_16BIT_SUPPORT
                 if (iBitdepth > 8)
                   iSamplesize = 4;
                 else
#endif
                   iSamplesize = 2;

                 break;
               }
    case  6  : ;                       /* rgb+alpha */
    case 14  : {                       /* JPEG rgb+alpha */
#ifndef MNG_NO_16BIT_SUPPORT
                 if (iBitdepth > 8)
                   iSamplesize = 8;
                 else
#endif
                   iSamplesize = 4;

                 break;
               }
  }
                                       /* make sure we remember all this */
  pImagedata->iSamplesize  = iSamplesize;
  pImagedata->iRowsize     = iSamplesize * iWidth;
  pImagedata->iImgdatasize = pImagedata->iRowsize * iHeight;

  if (pImagedata->iImgdatasize)        /* need a buffer ? */