Esempio n. 1
0
/*
 * Encode a rectangular chunk of pixels.  We break it up
 * into row-sized pieces to insure that encoded runs do
 * not span rows.  Otherwise, there can be problems with
 * the decoder if data is read, for example, by scanlines
 * when it was encoded by strips.
 */
static int
PackBitsEncodeChunk(TIFF* tif, tidata_t bp, tsize_t cc, tsample_t s)
{
    tsize_t rowsize = (tsize_t) tif->tif_data;

    assert(rowsize > 0);
    
#ifdef YCBCR_SUPPORT
    /* 
     * YCBCR data isn't really separable into rows, so we
     * might as well encode the whole tile/strip as one chunk.
     */
    if( tif->tif_dir.td_photometric == PHOTOMETRIC_YCBCR )
        rowsize = (tsize_t) tif->tif_data;
#endif

    while ((long)cc > 0) {
        int	chunk = rowsize;
        
        if( cc < chunk )
            chunk = cc;

        if (PackBitsEncode(tif, bp, chunk, s) < 0)
            return (-1);
        bp += chunk;
        cc -= chunk;
    }
    return (1);
}
/*
 * Encode a rectangular chunk of pixels.  We break it up
 * into row-sized pieces to insure that encoded runs do
 * not span rows.  Otherwise, there can be problems with
 * the decoder if data is read, for example, by scanlines
 * when it was encoded by strips.
 */
static int
PackBitsEncodeChunk(TIFF* tif, tidata_t bp, tsize_t cc, tsample_t s)
{
	tsize_t rowsize = (tsize_t) tif->tif_data;

	assert(rowsize > 0);
	while ((long)cc > 0) {
		if (PackBitsEncode(tif, bp, rowsize, s) < 0)
			return (-1);
		bp += rowsize;
		cc -= rowsize;
	}
	return (1);
}
Esempio n. 3
0
/*
 * Encode a rectangular chunk of pixels.  We break it up
 * into row-sized pieces to insure that encoded runs do
 * not span rows.  Otherwise, there can be problems with
 * the decoder if data is read, for example, by scanlines
 * when it was encoded by strips.
 */
static int
PackBitsEncodeChunk(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s)
{
  tmsize_t rowsize = *(tmsize_t*)tif->tif_data;

  while (cc > 0) {
    tmsize_t chunk = rowsize;
    
    if( cc < chunk )
        chunk = cc;

    if (PackBitsEncode(tif, bp, chunk, s) < 0)
        return (-1);
    bp += chunk;
    cc -= chunk;
  }
  return (1);
}
Esempio n. 4
0
/*
 * Encode a rectangular chunk of pixels.  We break it up
 * into row-sized pieces to insure that encoded runs do
 * not span rows.  Otherwise, there can be problems with
 * the decoder if data is read, for example, by scanlines
 * when it was encoded by strips.
 */
static int
PackBitsEncodeChunk(TIFF* tif, tidata_t bp, tsize_t cc, tsample_t s)
{
	tsize_t rowsize = *(tsize_t*)tif->tif_data;

	while ((long)cc > 0) {
		int	chunk = rowsize;
		
		if( cc < chunk )
		    chunk = cc;

		if (PackBitsEncode(tif, bp, chunk, s) < 0)
		    return (-1);
		bp += chunk;
		cc -= chunk;
	}
	return (1);
}