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- /* Copyright (C) 1997 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: gsalpha.c,v 1.2 2000/09/19 19:00:25 lpd Exp $ */
- /* Graphics state alpha value access */
- #include "gx.h"
- #include "gsalpha.h"
- #include "gxdcolor.h"
- #include "gzstate.h"
-
- /* setalpha */
- int
- gs_setalpha(gs_state * pgs, floatp alpha)
- {
- pgs->alpha =
- (gx_color_value) (alpha < 0 ? 0 : alpha > 1 ? gx_max_color_value :
- alpha * gx_max_color_value);
- gx_unset_dev_color(pgs);
- return 0;
- }
-
- /* currentalpha */
- float
- gs_currentalpha(const gs_state * pgs)
- {
- return (float)pgs->alpha / gx_max_color_value;
- }
-