/*
* Compute how many tiles are in an image.
*/
uint32
TIFFNumberOfTiles(TIFF* tif)
{
TIFFDirectory *td = &tif->tif_dir;
uint32 dx = td->td_tilewidth;
uint32 dy = td->td_tilelength;
uint32 dz = td->td_tiledepth;
uint32 ntiles;
if (dx == (uint32) -1)
dx = td->td_imagewidth;
if (dy == (uint32) -1)
dy = td->td_imagelength;
if (dz == (uint32) -1)
dz = td->td_imagedepth;
ntiles = (dx == 0 || dy == 0 || dz == 0) ? 0 :
_TIFFMultiply32(tif, _TIFFMultiply32(tif, TIFFhowmany_32(td->td_imagewidth, dx),
TIFFhowmany_32(td->td_imagelength, dy),
"TIFFNumberOfTiles"),
TIFFhowmany_32(td->td_imagedepth, dz), "TIFFNumberOfTiles");
if (td->td_planarconfig == PLANARCONFIG_SEPARATE)
ntiles = _TIFFMultiply32(tif, ntiles, td->td_samplesperpixel,
"TIFFNumberOfTiles");
return (ntiles);
}
/*
* Compute how many strips are in an image.
*/
uint32
TIFFNumberOfStrips(TIFF* tif)
{
TIFFDirectory *td = &tif->tif_dir;
uint32 nstrips;
nstrips = (td->td_rowsperstrip == (uint32) -1 ? 1 :
TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip));
if (td->td_planarconfig == PLANARCONFIG_SEPARATE)
nstrips = _TIFFMultiply32(tif, nstrips, (uint32)td->td_samplesperpixel,
"TIFFNumberOfStrips");
return (nstrips);
}
static int
initImage(void)
{
uint32 w, h;
if (order)
TIFFSetField(tif, TIFFTAG_FILLORDER, order);
if (photo != (uint16) -1)
TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, photo);
if (!TIFFRGBAImageBegin(&img, tif, stoponerr, title)) {
TIFFError(filelist[fileindex], "%s", title);
TIFFClose(tif);
tif = NULL;
return -1;
}
/*
* Setup the image raster as required.
*/
h = img.height;
w = img.width;
if (h > ymax) {
w = (int)(w * ((float)ymax / h));
h = ymax;
}
if (w > xmax) {
h = (int)(h * ((float)xmax / w));
w = xmax;
}
if (w != width || h != height) {
uint32 rastersize =
_TIFFMultiply32(tif, img.width, img.height, "allocating raster buffer");
if (raster != NULL)
_TIFFfree(raster), raster = NULL;
raster = (uint32*) _TIFFCheckMalloc(tif, rastersize, sizeof (uint32),
"allocating raster buffer");
if (raster == NULL) {
width = height = 0;
TIFFError(filelist[fileindex], "No space for raster buffer");
cleanup_and_exit();
}
width = w;
height = h;
}
TIFFRGBAImageGet(&img, raster, img.width, img.height);
#if HOST_BIGENDIAN
TIFFSwabArrayOfLong(raster,img.width*img.height);
#endif
return 0;
}
/*
* Compute how many strips are in an image.
*/
uint32
TIFFNumberOfStrips(TIFF* tif)
{
TIFFDirectory *td = &tif->tif_dir;
uint32 nstrips;
/* If the value was already computed and store in td_nstrips, then return it,
since ChopUpSingleUncompressedStrip might have altered and resized the
since the td_stripbytecount and td_stripoffset arrays to the new value
after the initial affectation of td_nstrips = TIFFNumberOfStrips() in
tif_dirread.c ~line 3612.
See http://bugzilla.maptools.org/show_bug.cgi?id=2587 */
if( td->td_nstrips )
return td->td_nstrips;
nstrips = (td->td_rowsperstrip == (uint32) -1 ? 1 :
TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip));
if (td->td_planarconfig == PLANARCONFIG_SEPARATE)
nstrips = _TIFFMultiply32(tif, nstrips, (uint32)td->td_samplesperpixel,
"TIFFNumberOfStrips");
return (nstrips);
}
