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/* Copyright (C) 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: gdevcmap.h,v 1.5 2002/06/16 07:25:26 lpd Exp $ */
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/* Interface to special color mapping device */
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#ifndef gdevcmap_INCLUDED
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# define gdevcmap_INCLUDED
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/* Define the color mapping algorithms. */
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typedef enum {
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/* Don't change the color. */
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device_cmap_identity = 0,
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/* Snap each RGB primary component to 0 or 1 individually. */
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device_cmap_snap_to_primaries,
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/* Snap black to white, other colors to black. */
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device_cmap_color_to_black_over_white,
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/* Convert to a gray shade of the correct brightness. */
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device_cmap_monochrome
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} gx_device_color_mapping_method_t;
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#define device_cmap_max_method device_cmap_monochrome
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/* Define the color mapping forwarding device. */
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typedef struct gx_device_cmap_s {
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gx_device_forward_common;
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gx_device_color_mapping_method_t mapping_method;
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} gx_device_cmap;
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extern_st(st_device_cmap);
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#define public_st_device_cmap() /* in gdevcmap.c */\
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gs_public_st_suffix_add0_final(st_device_cmap, gx_device_cmap,\
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"gx_device_cmap", device_cmap_enum_ptrs, device_cmap_reloc_ptrs,\
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gx_device_finalize, st_device_forward)
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/* Initialize a color mapping device. Do this just once after allocation. */
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int gdev_cmap_init(gx_device_cmap * dev, gx_device * target,
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gx_device_color_mapping_method_t mapping_method);
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/*
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* Clients can change the color mapping method at any time by setting
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* the ColorMappingMethod device parameter, but they must then call
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* gs_setdevice_no_init(pgs, dev);
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* for each graphics state that may reference the device.
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*/
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#endif /* gdevcmap_INCLUDED */
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