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/* Copyright (C) 2003 artofcode LLC. All rights reserved.
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This software is provided AS-IS with no warranty, either express or
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implied.
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This software is distributed under license and may not be copied,
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modified or distributed except as expressly authorized under the terms
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of the license contained in the file LICENSE in this distribution.
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For more information about licensing, please refer to
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http://www.ghostscript.com/licensing/. For information on
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commercial licensing, go to http://www.artifex.com/licensing/ or
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contact Artifex Software, Inc., 101 Lucas Valley Road #110,
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San Rafael, CA 94903, U.S.A., +1(415)492-9861.
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*/
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/* $Id: zfjpx.c,v 1.2 2004/08/11 14:33:02 stefan Exp $ */
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/* this is the ps interpreter interface to the jbig2decode filter
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used for (1bpp) scanned image compression. PDF only specifies
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a decoder filter, and we don't currently implement anything else */
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#include "memory_.h"
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#include "ghost.h"
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#include "oper.h"
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#include "gsstruct.h"
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#include "gstypes.h"
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#include "ialloc.h"
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#include "idict.h"
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#include "store.h"
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#include "stream.h"
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#include "strimpl.h"
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#include "ifilter.h"
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#include "sjpx.h"
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/* <source> /JPXDecode <file> */
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/* <source> <dict> /JPXDecode <file> */
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private int
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z_jpx_decode(i_ctx_t * i_ctx_p)
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{
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os_ptr op = osp;
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ref *sop = NULL;
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stream_jpxd_state state;
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state.jpx_memory = imemory->non_gc_memory;
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if (r_has_type(op, t_dictionary)) {
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check_dict_read(*op);
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if ( dict_find_string(op, "Colorspace", &sop) > 0) {
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dlprintf("found Colorspace parameter (NYI)\n");
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}
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}
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/* we pass npop=0, since we've no arguments left to consume */
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/* we pass 0 instead of the usual rspace(sop) which will allocate storage
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for filter state from the same memory pool as the stream it's coding.
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this causes no trouble because we maintain no pointers */
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return filter_read(i_ctx_p, 0, &s_jpxd_template,
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(stream_state *) & state, 0);
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}
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/* match the above routine to the corresponding filter name
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this is how our 'private' routines get called externally */
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const op_def zfjpx_op_defs[] = {
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op_def_begin_filter(),
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{"2JPXDecode", z_jpx_decode},
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op_def_end(0)
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};
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