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- /* Copyright (C) 1997 Aladdin Enterprises. All rights reserved.
-
- This file is part of Aladdin Ghostscript.
-
- Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
- or distributor accepts any responsibility for the consequences of using it,
- or for whether it serves any particular purpose or works at all, unless he
- or she says so in writing. Refer to the Aladdin Ghostscript Free Public
- License (the "License") for full details.
-
- Every copy of Aladdin Ghostscript must include a copy of the License,
- normally in a plain ASCII text file named PUBLIC. The License grants you
- the right to copy, modify and redistribute Aladdin Ghostscript, but only
- under certain conditions described in the License. Among other things, the
- License requires that the copyright notice and this notice be preserved on
- all copies.
- */
-
- /* zfunc0.c */
- /* PostScript language interface to FunctionType 0 (Sampled) Functions */
- #include "memory_.h"
- #include "ghost.h"
- #include "errors.h"
- #include "oper.h"
- #include "gsdsrc.h"
- #include "gsfunc.h"
- #include "gsfunc0.h"
- #include "stream.h" /* for files.h */
- #include "files.h"
- #include "ialloc.h"
- #include "idict.h"
- #include "idparam.h"
- #include "ifunc.h"
-
- /* Initialization */
- private build_function_proc(build_function_0);
- int
- zfunc0_init(gs_memory_t *mem)
- { build_function_procs[0] = build_function_0;
- return 0;
- }
-
- BEGIN_OP_DEFS(zfunc0_op_defs) {
- END_OP_DEFS(zfunc0_init) }
-
- /* Finish building a FunctionType 0 (Sampled) function. */
- private int
- build_function_0(const_os_ptr op, const gs_function_params_t *mnDR, int depth,
- gs_function_t **ppfn)
- { gs_function_Sd_params_t params;
- ref *pDataSource;
- int code;
-
- *(gs_function_params_t *)¶ms = *mnDR;
- params.Encode = 0;
- params.Decode = 0;
- params.Size = 0;
- if ( (code = dict_find_string(op, "DataSource", &pDataSource)) <= 0 )
- return(code < 0 ? code : gs_note_error(e_rangecheck));
- switch ( r_type(pDataSource) ) {
- case t_string:
- data_source_init_string2(¶ms.DataSource,
- pDataSource->value.const_bytes,
- r_size(pDataSource));
- break;
- case t_file:
- { stream *s;
-
- check_read_known_file_else(s, pDataSource, return_error,
- return_error(e_invalidfileaccess));
- if ( !(s->modes & s_mode_seek) )
- return_error(e_ioerror);
- data_source_init_stream(¶ms.DataSource, s);
- }
- break;
- default:
- return_error(e_rangecheck);
- }
- if ( (code = dict_int_param(op, "Order", 1, 3, 1, ¶ms.Order)) < 0 ||
- (code = dict_int_param(op, "BitsPerSample", 1, 32, 0,
- ¶ms.BitsPerSample)) < 0 ||
- ((code = fn_build_float_array(op, "Encode", false, true, ¶ms.Encode)) != 2 * params.m && (code != 0 || params.Encode != 0)) ||
- ((code = fn_build_float_array(op, "Decode", false, true, ¶ms.Decode)) != 2 * params.n && (code != 0 || params.Decode != 0))
- ) {
- goto fail;
- }
- { int *ptr = (int *)ialloc_byte_array(params.m, sizeof(int), "Size");
-
- if ( ptr == 0 ) {
- code = gs_note_error(e_VMerror);
- goto fail;
- }
- params.Size = ptr;
- code = dict_int_array_param(op, "Size", params.m, ptr);
- if ( code != params.m )
- goto fail;
- }
- code = gs_function_Sd_init(ppfn, ¶ms, imemory);
- if ( code >= 0 )
- return 0;
- fail: gs_function_Sd_free_params(¶ms, imemory);
- return(code < 0 ? code : gs_note_error(e_rangecheck));
- }
-