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/* Copyright (C) 1994, 1998, 1999 Aladdin Enterprises. 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: sjpege.c,v 1.5 2002/02/21 22:24:54 giles Exp $ */
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/* Interface routines for IJG encoding code. */
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#include "stdio_.h"
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#include "string_.h"
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#include "jpeglib_.h"
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#include "jerror_.h"
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#include "gx.h"
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#include "gserrors.h"
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#include "strimpl.h"
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#include "sdct.h"
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#include "sjpeg.h"
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/*
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* Interface routines. This layer of routines exists solely to limit
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* side-effects from using setjmp.
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*/
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int
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gs_jpeg_create_compress(stream_DCT_state * st)
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{ /* Initialize error handling */
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gs_jpeg_error_setup(st);
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/* Establish the setjmp return context for gs_jpeg_error_exit to use. */
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if (setjmp(st->data.common->exit_jmpbuf))
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return_error(gs_jpeg_log_error(st));
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jpeg_stream_data_common_init(st->data.compress);
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jpeg_create_compress(&st->data.compress->cinfo);
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return 0;
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}
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int
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gs_jpeg_set_defaults(stream_DCT_state * st)
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{
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if (setjmp(st->data.common->exit_jmpbuf))
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return_error(gs_jpeg_log_error(st));
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jpeg_set_defaults(&st->data.compress->cinfo);
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return 0;
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}
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int
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gs_jpeg_set_colorspace(stream_DCT_state * st,
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J_COLOR_SPACE colorspace)
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{
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if (setjmp(st->data.common->exit_jmpbuf))
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return_error(gs_jpeg_log_error(st));
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jpeg_set_colorspace(&st->data.compress->cinfo, colorspace);
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return 0;
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}
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int
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gs_jpeg_set_linear_quality(stream_DCT_state * st,
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int scale_factor, boolean force_baseline)
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{
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if (setjmp(st->data.common->exit_jmpbuf))
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return_error(gs_jpeg_log_error(st));
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jpeg_set_linear_quality(&st->data.compress->cinfo,
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scale_factor, force_baseline);
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return 0;
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}
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int
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gs_jpeg_set_quality(stream_DCT_state * st,
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int quality, boolean force_baseline)
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{
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if (setjmp(st->data.common->exit_jmpbuf))
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return_error(gs_jpeg_log_error(st));
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jpeg_set_quality(&st->data.compress->cinfo,
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quality, force_baseline);
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return 0;
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}
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int
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gs_jpeg_start_compress(stream_DCT_state * st,
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boolean write_all_tables)
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{
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if (setjmp(st->data.common->exit_jmpbuf))
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return_error(gs_jpeg_log_error(st));
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jpeg_start_compress(&st->data.compress->cinfo, write_all_tables);
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return 0;
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}
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int
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gs_jpeg_write_scanlines(stream_DCT_state * st,
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JSAMPARRAY scanlines,
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int num_lines)
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{
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if (setjmp(st->data.common->exit_jmpbuf))
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return_error(gs_jpeg_log_error(st));
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return (int)jpeg_write_scanlines(&st->data.compress->cinfo,
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scanlines, (JDIMENSION) num_lines);
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}
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int
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gs_jpeg_finish_compress(stream_DCT_state * st)
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{
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if (setjmp(st->data.common->exit_jmpbuf))
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return_error(gs_jpeg_log_error(st));
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jpeg_finish_compress(&st->data.compress->cinfo);
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return 0;
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}
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