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126 lines
3.3 KiB
126 lines
3.3 KiB
/* $Header: /cvs/maptools/cvsroot/libtiff/libtiff/tif_dumpmode.c,v 1.5.2.2 2010-06-08 18:50:42 bfriesen Exp $ */ |
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/* |
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* Copyright (c) 1988-1997 Sam Leffler |
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* Copyright (c) 1991-1997 Silicon Graphics, Inc. |
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* |
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* Permission to use, copy, modify, distribute, and sell this software and |
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* its documentation for any purpose is hereby granted without fee, provided |
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* that (i) the above copyright notices and this permission notice appear in |
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* all copies of the software and related documentation, and (ii) the names of |
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* Sam Leffler and Silicon Graphics may not be used in any advertising or |
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* publicity relating to the software without the specific, prior written |
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* permission of Sam Leffler and Silicon Graphics. |
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* |
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* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY |
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* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. |
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* |
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* IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR |
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* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, |
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* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, |
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* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF |
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* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE |
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* OF THIS SOFTWARE. |
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*/ |
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/* |
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* TIFF Library. |
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* |
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* "Null" Compression Algorithm Support. |
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*/ |
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#include "tiffiop.h" |
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/* |
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* Encode a hunk of pixels. |
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*/ |
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static int |
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DumpModeEncode(TIFF* tif, tidata_t pp, tsize_t cc, tsample_t s) |
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{ |
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(void) s; |
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while (cc > 0) { |
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tsize_t n; |
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n = cc; |
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if (tif->tif_rawcc + n > tif->tif_rawdatasize) |
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n = tif->tif_rawdatasize - tif->tif_rawcc; |
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assert( n > 0 ); |
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/* |
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* Avoid copy if client has setup raw |
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* data buffer to avoid extra copy. |
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*/ |
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if (tif->tif_rawcp != pp) |
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_TIFFmemcpy(tif->tif_rawcp, pp, n); |
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tif->tif_rawcp += n; |
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tif->tif_rawcc += n; |
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pp += n; |
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cc -= n; |
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if (tif->tif_rawcc >= tif->tif_rawdatasize && |
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!TIFFFlushData1(tif)) |
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return (-1); |
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} |
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return (1); |
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} |
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/* |
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* Decode a hunk of pixels. |
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*/ |
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static int |
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DumpModeDecode(TIFF* tif, tidata_t buf, tsize_t cc, tsample_t s) |
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{ |
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(void) s; |
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/* fprintf(stderr,"DumpModeDecode: scanline %ld, expected %ld bytes, got %ld bytes\n", */ |
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/* (long) tif->tif_row, (long) tif->tif_rawcc, (long) cc); */ |
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if (tif->tif_rawcc < cc) { |
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TIFFErrorExt(tif->tif_clientdata, tif->tif_name, |
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"DumpModeDecode: Not enough data for scanline %d", |
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tif->tif_row); |
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return (0); |
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} |
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/* |
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* Avoid copy if client has setup raw |
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* data buffer to avoid extra copy. |
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*/ |
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if (tif->tif_rawcp != buf) |
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_TIFFmemcpy(buf, tif->tif_rawcp, cc); |
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tif->tif_rawcp += cc; |
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tif->tif_rawcc -= cc; |
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return (1); |
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} |
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/* |
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* Seek forwards nrows in the current strip. |
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*/ |
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static int |
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DumpModeSeek(TIFF* tif, uint32 nrows) |
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{ |
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tif->tif_rawcp += nrows * tif->tif_scanlinesize; |
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tif->tif_rawcc -= nrows * tif->tif_scanlinesize; |
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return (1); |
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} |
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/* |
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* Initialize dump mode. |
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*/ |
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int |
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TIFFInitDumpMode(TIFF* tif, int scheme) |
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{ |
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(void) scheme; |
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tif->tif_decoderow = DumpModeDecode; |
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tif->tif_decodestrip = DumpModeDecode; |
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tif->tif_decodetile = DumpModeDecode; |
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tif->tif_encoderow = DumpModeEncode; |
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tif->tif_encodestrip = DumpModeEncode; |
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tif->tif_encodetile = DumpModeEncode; |
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tif->tif_seek = DumpModeSeek; |
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return (1); |
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} |
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/* |
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* Local Variables: |
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* mode: c |
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* c-basic-offset: 8 |
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* fill-column: 78 |
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* End: |
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*/
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