src/tiff/contrib/win_dib/tiff2dib.c

   1 /*************************************************************************
   2  *
   3  * Source file for Windows 95/Win32.
   4  *
   5  * The function LoadTIFFinDIB in this source file let you load
   6  * a TIFF file and build a memory DIB with it and return the
   7  * HANDLE (HDIB) of the memory bloc containing the DIB.
   8  *
   9  *  Example :
  10  *
  11  *   HDIB   hDIB;
  12  *   hDIB = LoadTIFFinDIB("sample.tif");
  13  *
  14  *
  15  * To build this source file you must include the TIFF library
  16  * in your project.
  17  *
  18  * 4/12/95   Philippe Tenenhaus   100423.3705@compuserve.com
  19  *
  20  ************************************************************************/
  21
  22
  23 #include "tiffio.h"
  24
  25 #define HDIB HANDLE
  26 #define IS_WIN30_DIB(lpbi)  ((*(LPDWORD)(lpbi)) == sizeof(BITMAPINFOHEADER))
  27 #define CVT(x)      (((x) * 255L) / ((1L<<16)-1))
  28
  29 static HDIB CreateDIB(DWORD dwWidth, DWORD dwHeight, WORD wBitCount);
  30 static LPSTR FindDIBBits(LPSTR lpDIB);
  31 static WORD PaletteSize(LPSTR lpDIB);
  32 static WORD DIBNumColors(LPSTR lpDIB);
  33 static int checkcmap(int n, uint16* r, uint16* g, uint16* b);
  34
  35
  36
  37 /*************************************************************************
  38  *
  39  * HDIB LoadTIFFinDIB(LPSTR lpFileName)
  40  *
  41  * Parameter:
  42  *
  43  * LPSTR lpDIB      - File name of a tiff imag
  44  *
  45  * Return Value:
  46  *
  47  * LPSTR            - HANDLE of a DIB
  48  *
  49  * Description:
  50  *
  51  * This function load a TIFF file and build a memory DIB with it
  52  * and return the HANDLE (HDIB) of the memory bloc containing
  53  * the DIB.
  54  *
  55  * 4/12/95   Philippe Tenenhaus   100423.3705@compuserve.com
  56  *
  57  ************************************************************************/
  58
  59 HDIB LoadTIFFinDIB(LPSTR lpFileName)
  60 {
  61     TIFF          *tif;
  62     unsigned long imageLength;
  63     unsigned long imageWidth;
  64     unsigned int  BitsPerSample;
  65     unsigned long LineSize;
  66     unsigned int  SamplePerPixel;
  67     unsigned long RowsPerStrip;
  68     int           PhotometricInterpretation;
  69     long          nrow;
  70         unsigned long row;
  71     char          *buf;
  72     LPBITMAPINFOHEADER lpDIB;
  73     HDIB          hDIB;
  74     char          *lpBits;
  75     HGLOBAL       hStrip;
  76     int           i,l;
  77     int           Align;
  78
  79     tif = TIFFOpen(lpFileName, "r");
  80
  81     if (!tif)
  82         goto TiffOpenError;
  83
  84     TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &imageWidth);
  85     TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &imageLength);
  86     TIFFGetField(tif, TIFFTAG_BITSPERSAMPLE, &BitsPerSample);
  87     TIFFGetField(tif, TIFFTAG_ROWSPERSTRIP, &RowsPerStrip);
  88     TIFFGetField(tif, TIFFTAG_ROWSPERSTRIP, &RowsPerStrip);
  89     TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &PhotometricInterpretation);
  90
  91     LineSize = TIFFScanlineSize(tif); //Number of byte in ine line
  92
  93     SamplePerPixel = (int) (LineSize/imageWidth);
  94
  95     //Align = Number of byte to add at the end of each line of the DIB
  96     Align = 4 - (LineSize % 4);
  97     if (Align == 4)     Align = 0;
  98
  99
 100     //Create a new DIB
 101     hDIB = CreateDIB((DWORD) imageWidth, (DWORD) imageLength, (WORD)
 102 (BitsPerSample*SamplePerPixel));
 103     lpDIB  = (LPBITMAPINFOHEADER) GlobalLock(hDIB);
 104     if (!lpDIB)
 105           goto OutOfDIBMemory;
 106
 107     if (lpDIB)
 108        lpBits = FindDIBBits((LPSTR) lpDIB);
 109
 110     //In the tiff file the lines are save from up to down
 111         //In a DIB the lines must be save from down to up
 112     if (lpBits)
 113       {
 114         lpBits = FindDIBBits((LPSTR) lpDIB);
 115         lpBits+=((imageWidth*SamplePerPixel)+Align)*(imageLength-1);
 116                 //now lpBits pointe on the bottom line
 117
 118         hStrip = GlobalAlloc(GHND,TIFFStripSize(tif));
 119         buf = GlobalLock(hStrip);
 120
 121         if (!buf)
 122            goto OutOfBufMemory;
 123
 124         //PhotometricInterpretation = 2 image is RGB
 125         //PhotometricInterpretation = 3 image have a color palette
 126         if (PhotometricInterpretation == 3)
 127         {
 128           uint16* red;
 129           uint16* green;
 130           uint16* blue;
 131           int16 i;
 132           LPBITMAPINFO lpbmi;
 133           int   Palette16Bits;
 134
 135           TIFFGetField(tif, TIFFTAG_COLORMAP, &red, &green, &blue);
 136
 137                   //Is the palette 16 or 8 bits ?
 138           if (checkcmap(1<<BitsPerSample, red, green, blue) == 16)
 139              Palette16Bits = TRUE;
 140           else
 141              Palette16Bits = FALSE;
 142
 143           lpbmi = (LPBITMAPINFO)lpDIB;
 144
 145           //load the palette in the DIB
 146           for (i = (1<<BitsPerSample)-1; i >= 0; i--)
 147             {
 148              if (Palette16Bits)
 149                 {
 150                   lpbmi->bmiColors[i].rgbRed =(BYTE) CVT(red[i]);
 151                   lpbmi->bmiColors[i].rgbGreen = (BYTE) CVT(green[i]);
 152                   lpbmi->bmiColors[i].rgbBlue = (BYTE) CVT(blue[i]);
 153                 }
 154              else
 155                 {
 156                   lpbmi->bmiColors[i].rgbRed = (BYTE) red[i];
 157                   lpbmi->bmiColors[i].rgbGreen = (BYTE) green[i];
 158                   lpbmi->bmiColors[i].rgbBlue = (BYTE) blue[i];
 159                 }
 160             }
 161
 162         }
 163
 164         //read the tiff lines and save them in the DIB
 165                 //with RGB mode, we have to change the order of the 3 samples RGB
 166 <=> BGR
 167         for (row = 0; row < imageLength; row += RowsPerStrip)
 168           {
 169             nrow = (row + RowsPerStrip > imageLength ? imageLength - row :
 170 RowsPerStrip);
 171             if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, row, 0),
 172                 buf, nrow*LineSize)==-1)
 173                   {
 174                      goto TiffReadError;
 175                   }
 176             else
 177                   {
 178                     for (l = 0; l < nrow; l++)
 179                       {
 180                          if (SamplePerPixel  == 3)
 181                            for (i=0;i< (int) (imageWidth);i++)
 182                               {
 183                                lpBits[i*SamplePerPixel+0]=buf[l*LineSize+i*Sample
 184 PerPixel+2];
 185                                lpBits[i*SamplePerPixel+1]=buf[l*LineSize+i*Sample
 186 PerPixel+1];
 187                                lpBits[i*SamplePerPixel+2]=buf[l*LineSize+i*Sample
 188 PerPixel+0];
 189                               }
 190                          else
 191                            memcpy(lpBits, &buf[(int) (l*LineSize)], (int)
 192 imageWidth*SamplePerPixel);
 193
 194                          lpBits-=imageWidth*SamplePerPixel+Align;
 195
 196                       }
 197                  }
 198           }
 199         GlobalUnlock(hStrip);
 200         GlobalFree(hStrip);
 201         GlobalUnlock(hDIB);
 202         TIFFClose(tif);
 203       }
 204
 205     return hDIB;
 206
 207     OutOfBufMemory:
 208
 209     TiffReadError:
 210        GlobalUnlock(hDIB);
 211        GlobalFree(hStrip);
 212     OutOfDIBMemory:
 213        TIFFClose(tif);
 214     TiffOpenError:
 215        return (HANDLE) 0;
 216
 217
 218 }
 219
 220
 221 static int checkcmap(int n, uint16* r, uint16* g, uint16* b)
 222 {
 223     while (n-- > 0)
 224         if (*r++ >= 256 || *g++ >= 256 || *b++ >= 256)
 225         return (16);
 226
 227     return (8);
 228 }
 229
 230
 231
 232 /*************************************************************************
 233  * All the following functions were created by microsoft, they are
 234  * parts of the sample project "wincap" given with the SDK Win32.
 235  *
 236  * Microsoft says that :
 237  *
 238  *  You have a royalty-free right to use, modify, reproduce and
 239  *  distribute the Sample Files (and/or any modified version) in
 240  *  any way you find useful, provided that you agree that
 241  *  Microsoft has no warranty obligations or liability for any
 242  *  Sample Application Files which are modified.
 243  *
 244  ************************************************************************/
 245
 246 HDIB CreateDIB(DWORD dwWidth, DWORD dwHeight, WORD wBitCount)
 247 {
 248    BITMAPINFOHEADER bi;         // bitmap header
 249    LPBITMAPINFOHEADER lpbi;     // pointer to BITMAPINFOHEADER
 250    DWORD dwLen;                 // size of memory block
 251    HDIB hDIB;
 252    DWORD dwBytesPerLine;        // Number of bytes per scanline
 253
 254
 255    // Make sure bits per pixel is valid
 256    if (wBitCount <= 1)
 257       wBitCount = 1;
 258    else if (wBitCount <= 4)
 259       wBitCount = 4;
 260    else if (wBitCount <= 8)
 261       wBitCount = 8;
 262    else if (wBitCount <= 24)
 263       wBitCount = 24;
 264    else
 265       wBitCount = 4;  // set default value to 4 if parameter is bogus
 266
 267    // initialize BITMAPINFOHEADER
 268    bi.biSize = sizeof(BITMAPINFOHEADER);
 269    bi.biWidth = dwWidth;         // fill in width from parameter
 270    bi.biHeight = dwHeight;       // fill in height from parameter
 271    bi.biPlanes = 1;              // must be 1
 272    bi.biBitCount = wBitCount;    // from parameter
 273    bi.biCompression = BI_RGB;
 274    bi.biSizeImage = (dwWidth*dwHeight*wBitCount)/8; //0;           // 0's here
 275 mean "default"
 276    bi.biXPelsPerMeter = 2834; //0;
 277    bi.biYPelsPerMeter = 2834; //0;
 278    bi.biClrUsed = 0;
 279    bi.biClrImportant = 0;
 280
 281    // calculate size of memory block required to store the DIB.  This
 282    // block should be big enough to hold the BITMAPINFOHEADER, the color
 283    // table, and the bits
 284
 285    dwBytesPerLine =   (((wBitCount * dwWidth) + 31) / 32 * 4);
 286    dwLen = bi.biSize + PaletteSize((LPSTR)&bi) + (dwBytesPerLine * dwHeight);
 287
 288    // alloc memory block to store our bitmap
 289    hDIB = GlobalAlloc(GHND, dwLen);
 290
 291    // major bummer if we couldn't get memory block
 292    if (!hDIB)
 293    {
 294       return NULL;
 295    }
 296
 297    // lock memory and get pointer to it
 298    lpbi = (VOID FAR *)GlobalLock(hDIB);
 299
 300    // use our bitmap info structure to fill in first part of
 301    // our DIB with the BITMAPINFOHEADER
 302    *lpbi = bi;
 303
 304    // Since we don't know what the colortable and bits should contain,
 305    // just leave these blank.  Unlock the DIB and return the HDIB.
 306
 307    GlobalUnlock(hDIB);
 308
 309    /* return handle to the DIB */
 310    return hDIB;
 311 }
 312
 313
 314 LPSTR FAR FindDIBBits(LPSTR lpDIB)
 315 {
 316    return (lpDIB + *(LPDWORD)lpDIB + PaletteSize(lpDIB));
 317 }
 318
 319
 320 WORD FAR PaletteSize(LPSTR lpDIB)
 321 {
 322    /* calculate the size required by the palette */
 323    if (IS_WIN30_DIB (lpDIB))
 324       return (DIBNumColors(lpDIB) * sizeof(RGBQUAD));
 325    else
 326       return (DIBNumColors(lpDIB) * sizeof(RGBTRIPLE));
 327 }
 328
 329
 330 WORD DIBNumColors(LPSTR lpDIB)
 331 {
 332    WORD wBitCount;  // DIB bit count
 333
 334    /*  If this is a Windows-style DIB, the number of colors in the
 335     *  color table can be less than the number of bits per pixel
 336     *  allows for (i.e. lpbi->biClrUsed can be set to some value).
 337     *  If this is the case, return the appropriate value.
 338     */
 339
 340    if (IS_WIN30_DIB(lpDIB))
 341    {
 342       DWORD dwClrUsed;
 343
 344       dwClrUsed = ((LPBITMAPINFOHEADER)lpDIB)->biClrUsed;
 345       if (dwClrUsed)
 346      return (WORD)dwClrUsed;
 347    }
 348
 349    /*  Calculate the number of colors in the color table based on
 350     *  the number of bits per pixel for the DIB.
 351     */
 352    if (IS_WIN30_DIB(lpDIB))
 353       wBitCount = ((LPBITMAPINFOHEADER)lpDIB)->biBitCount;
 354    else
 355       wBitCount = ((LPBITMAPCOREHEADER)lpDIB)->bcBitCount;
 356
 357    /* return number of colors based on bits per pixel */
 358    switch (wBitCount)
 359       {
 360    case 1:
 361       return 2;
 362
 363    case 4:
 364       return 16;
 365
 366    case 8:
 367       return 256;
 368
 369    default:
 370       return 0;
 371       }
 372 }
 373 /*
 374  * Local Variables:
 375  * mode: c
 376  * c-basic-offset: 8
 377  * fill-column: 78
 378  * End:
 379  */