/* Portions Copyright (C) 2001 artofcode LLC.
   Portions Copyright (C) 1996, 2001 Artifex Software Inc.
   Portions Copyright (C) 1988, 2000 Aladdin Enterprises.
   This software is based in part on the work of the Independent JPEG Group.
   All Rights Reserved.

   This software is distributed under license and may not be copied, modified
   or distributed except as expressly authorized under the terms of that
   license.  Refer to licensing information at http://www.artifex.com/ or
   contact Artifex Software, Inc., 101 Lucas Valley Road #110,
   San Rafael, CA  94903, (415)492-9861, for further information. */

/*$RCSfile: gsrop.c,v $ $Revision: 1.8 $ */
/* RasterOp / transparency accessing for library */
#include "gx.h"
#include "gserrors.h"
#include "gzstate.h"
#include "gsrop.h"

/* setrasterop */
int
gs_setrasterop(gs_state * pgs, gs_rop3_t rop)
{
    if (pgs->in_cachedevice)
	return_error(pgs->memory, gs_error_undefined);
    pgs->log_op = (rop & rop3_1) | (pgs->log_op & ~rop3_1);
    return 0;
}

/* currentrasterop */
gs_rop3_t
gs_currentrasterop(const gs_state * pgs)
{
    return lop_rop(pgs->log_op);
}

/* setsourcetransparent */
int
gs_setsourcetransparent(gs_state * pgs, bool transparent)
{
    if (pgs->in_cachedevice)
	return_error(pgs->memory, gs_error_undefined);
    pgs->log_op =
	(transparent ? pgs->log_op | lop_S_transparent :
	 pgs->log_op & ~lop_S_transparent);
    return 0;
}

/* currentsourcetransparent */
bool
gs_currentsourcetransparent(const gs_state * pgs)
{
    return (pgs->log_op & lop_S_transparent) != 0;
}

/* settexturetransparent */
int
gs_settexturetransparent(gs_state * pgs, bool transparent)
{
    if (pgs->in_cachedevice)
	return_error(pgs->memory, gs_error_undefined);
    pgs->log_op =
	(transparent ? pgs->log_op | lop_T_transparent :
	 pgs->log_op & ~lop_T_transparent);
    return 0;
}

/* currenttexturetransparent */
bool
gs_currenttexturetransparent(const gs_state * pgs)
{
    return (pgs->log_op & lop_T_transparent) != 0;
}

/* Save/restore logical operation.  (For internal use only.) */
int
gs_set_logical_op(gs_state * pgs, gs_logical_operation_t lop)
{
    pgs->log_op = lop;
    return 0;
}
gs_logical_operation_t
gs_current_logical_op(const gs_state * pgs)
{
    return pgs->log_op;
}
