jpeg2sprt.c

   1 /*
   2  * jpeg2sprt.c
   3  * Copyright (C) 2000-2002 A.J. van Os; Released under GPL
   4  *
   5  * Description:
   6  * Functions to translate jpeg pictures into sprites
   7  */
   8
   9 #include <stdio.h>
  10 #include "antiword.h"
  11
  12 #if 0 /* defined(DEBUG) */
  13 static int iPicCounter = 0;
  14 #endif /* DEBUG */
  15
  16
  17 #if 0 /* defined(DEBUG) */
  18 static void
  19 vCopy2File(UCHAR *pucJpeg, size_t tJpegSize)
  20 {
  21         FILE    *pOutFile;
  22         size_t  tIndex;
  23         char    szFilename[30];
  24
  25         sprintf(szFilename, "<Wimp$ScrapDir>.jpeg%04d", ++iPicCounter);
  26         pOutFile = fopen(szFilename, "wb");
  27         if (pOutFile == NULL) {
  28                 return;
  29         }
  30         DBG_MSG(szFilename);
  31         for (tIndex = 0; tIndex < tJpegSize; tIndex++) {
  32                 if (putc(pucJpeg[tIndex], pOutFile) == EOF) {
  33                         break;
  34                 }
  35         }
  36         (void)fclose(pOutFile);
  37         vSetFiletype(szFilename, FILETYPE_JPEG);
  38 } /* end of vCopy2File */
  39 #endif /* DEBUG */
  40
  41 /*
  42  * bSave2Draw - save the JPEG picture to the Draw file
  43  *
  44  * This function puts a JPEG picture in a Draw file
  45  *
  46  * return TRUE when sucessful, otherwise FALSE
  47  */
  48 BOOL
  49 bSave2Draw(diagram_type *pDiag, FILE *pFile,
  50         size_t tJpegSize, const imagedata_type *pImg)
  51 {
  52         UCHAR   *pucJpeg, *pucTmp;
  53         size_t  tLen;
  54         int     iByte;
  55
  56         pucJpeg = xmalloc(tJpegSize);
  57         for (pucTmp = pucJpeg, tLen = 0; tLen < tJpegSize; pucTmp++, tLen++) {
  58                 iByte = iNextByte(pFile);
  59                 if (iByte == EOF) {
  60                         return FALSE;
  61                 }
  62                 *pucTmp = (UCHAR)iByte;
  63         }
  64
  65 #if 0 /* defined(DEBUG) */
  66         vCopy2File(pucJpeg, tJpegSize);
  67 #endif /* DEBUG */
  68
  69         /* Add the JPEG to the Draw file */
  70         vImage2Diagram(pDiag, pImg, pucJpeg, tJpegSize);
  71
  72         xfree(pucJpeg);
  73         return TRUE;
  74 } /* end of bSave2Draw */
  75
  76 /*
  77  * bTranslateJPEG - translate a JPEG picture
  78  *
  79  * This function translates a picture from jpeg to sprite
  80  *
  81  * return TRUE when sucessful, otherwise FALSE
  82  */
  83 BOOL
  84 bTranslateJPEG(diagram_type *pDiag, FILE *pFile,
  85         ULONG ulFileOffset, size_t tPictureLen, const imagedata_type *pImg)
  86 {
  87         /* Seek to start position of JPEG data */
  88         if (!bSetDataOffset(pFile, ulFileOffset)) {
  89                 return FALSE;
  90         }
  91
  92         if (iGetRiscOsVersion() >= 360) {
  93                 return bSave2Draw(pDiag, pFile, tPictureLen, pImg);
  94         }
  95         /* JPEG is not supported until RISC OS 3.6 */
  96         return bAddDummyImage(pDiag, pImg);
  97 } /* end of bTranslateJPEG */