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- /* Copyright (C) 1994, 1998, 1999 Aladdin Enterprises. All rights reserved.
-
- This file is part of AFPL Ghostscript.
-
- AFPL 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 Free Public License (the
- "License") for full details.
-
- Every copy of AFPL 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 AFPL 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.
- */
-
- /*$Id: sjpege.c,v 1.2 2000/09/19 19:00:50 lpd Exp $ */
- /* Interface routines for IJG encoding code. */
- #include "stdio_.h"
- #include "string_.h"
- #include "jpeglib_.h"
- #include "jerror_.h"
- #include "gx.h"
- #include "gserrors.h"
- #include "strimpl.h"
- #include "sdct.h"
- #include "sjpeg.h"
-
- /*
- * Interface routines. This layer of routines exists solely to limit
- * side-effects from using setjmp.
- */
-
- int
- gs_jpeg_create_compress(stream_DCT_state * st)
- { /* Initialize error handling */
- gs_jpeg_error_setup(st);
- /* Establish the setjmp return context for gs_jpeg_error_exit to use. */
- if (setjmp(st->data.common->exit_jmpbuf))
- return_error(gs_jpeg_log_error(st));
-
- jpeg_create_compress(&st->data.compress->cinfo);
- jpeg_stream_data_common_init(st->data.compress);
- return 0;
- }
-
- int
- gs_jpeg_set_defaults(stream_DCT_state * st)
- {
- if (setjmp(st->data.common->exit_jmpbuf))
- return_error(gs_jpeg_log_error(st));
- jpeg_set_defaults(&st->data.compress->cinfo);
- return 0;
- }
-
- int
- gs_jpeg_set_colorspace(stream_DCT_state * st,
- J_COLOR_SPACE colorspace)
- {
- if (setjmp(st->data.common->exit_jmpbuf))
- return_error(gs_jpeg_log_error(st));
- jpeg_set_colorspace(&st->data.compress->cinfo, colorspace);
- return 0;
- }
-
- int
- gs_jpeg_set_linear_quality(stream_DCT_state * st,
- int scale_factor, boolean force_baseline)
- {
- if (setjmp(st->data.common->exit_jmpbuf))
- return_error(gs_jpeg_log_error(st));
- jpeg_set_linear_quality(&st->data.compress->cinfo,
- scale_factor, force_baseline);
- return 0;
- }
-
- int
- gs_jpeg_set_quality(stream_DCT_state * st,
- int quality, boolean force_baseline)
- {
- if (setjmp(st->data.common->exit_jmpbuf))
- return_error(gs_jpeg_log_error(st));
- jpeg_set_quality(&st->data.compress->cinfo,
- quality, force_baseline);
- return 0;
- }
-
- int
- gs_jpeg_start_compress(stream_DCT_state * st,
- boolean write_all_tables)
- {
- if (setjmp(st->data.common->exit_jmpbuf))
- return_error(gs_jpeg_log_error(st));
- jpeg_start_compress(&st->data.compress->cinfo, write_all_tables);
- return 0;
- }
-
- int
- gs_jpeg_write_scanlines(stream_DCT_state * st,
- JSAMPARRAY scanlines,
- int num_lines)
- {
- if (setjmp(st->data.common->exit_jmpbuf))
- return_error(gs_jpeg_log_error(st));
- return (int)jpeg_write_scanlines(&st->data.compress->cinfo,
- scanlines, (JDIMENSION) num_lines);
- }
-
- int
- gs_jpeg_finish_compress(stream_DCT_state * st)
- {
- if (setjmp(st->data.common->exit_jmpbuf))
- return_error(gs_jpeg_log_error(st));
- jpeg_finish_compress(&st->data.compress->cinfo);
- return 0;
- }
-