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/* Copyright (C) 1997 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: gsalpha.c,v 1.4 2002/02/21 22:24:52 giles Exp $ */
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/* Graphics state alpha value access */
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#include "gx.h"
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#include "gsalpha.h"
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#include "gxdcolor.h"
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#include "gzstate.h"
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/* setalpha */
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int
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gs_setalpha(gs_state * pgs, floatp alpha)
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{
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pgs->alpha =
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(gx_color_value) (alpha < 0 ? 0 : alpha > 1 ? gx_max_color_value :
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alpha * gx_max_color_value);
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gx_unset_dev_color(pgs);
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return 0;
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}
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/* currentalpha */
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float
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gs_currentalpha(const gs_state * pgs)
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{
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return (float)pgs->alpha / gx_max_color_value;
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}
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