17dd7cddfSDavid du Colombier /* Copyright (C) 1994, 1997 Aladdin Enterprises. All rights reserved. 27dd7cddfSDavid du Colombier 3*593dc095SDavid du Colombier This software is provided AS-IS with no warranty, either express or 4*593dc095SDavid du Colombier implied. 57dd7cddfSDavid du Colombier 6*593dc095SDavid du Colombier This software is distributed under license and may not be copied, 7*593dc095SDavid du Colombier modified or distributed except as expressly authorized under the terms 8*593dc095SDavid du Colombier of the license contained in the file LICENSE in this distribution. 97dd7cddfSDavid du Colombier 10*593dc095SDavid du Colombier For more information about licensing, please refer to 11*593dc095SDavid du Colombier http://www.ghostscript.com/licensing/. For information on 12*593dc095SDavid du Colombier commercial licensing, go to http://www.artifex.com/licensing/ or 13*593dc095SDavid du Colombier contact Artifex Software, Inc., 101 Lucas Valley Road #110, 14*593dc095SDavid du Colombier San Rafael, CA 94903, U.S.A., +1(415)492-9861. 157dd7cddfSDavid du Colombier */ 167dd7cddfSDavid du Colombier 17*593dc095SDavid du Colombier /* $Id: gsht1.h,v 1.5 2002/06/16 08:45:42 lpd Exp $ */ 187dd7cddfSDavid du Colombier /* Extended public interface to halftones */ 197dd7cddfSDavid du Colombier 207dd7cddfSDavid du Colombier #ifndef gsht1_INCLUDED 217dd7cddfSDavid du Colombier # define gsht1_INCLUDED 227dd7cddfSDavid du Colombier 237dd7cddfSDavid du Colombier #include "gsht.h" 247dd7cddfSDavid du Colombier 257dd7cddfSDavid du Colombier /* Procedural interface */ 26*593dc095SDavid du Colombier int gs_setcolorscreen(gs_state *, gs_colorscreen_halftone *); 27*593dc095SDavid du Colombier int gs_currentcolorscreen(gs_state *, gs_colorscreen_halftone *); 287dd7cddfSDavid du Colombier 297dd7cddfSDavid du Colombier /* 307dd7cddfSDavid du Colombier * We include sethalftone here, even though it is a Level 2 feature, 317dd7cddfSDavid du Colombier * because it turns out to be convenient to define setcolorscreen 327dd7cddfSDavid du Colombier * using sethalftone. 337dd7cddfSDavid du Colombier */ 347dd7cddfSDavid du Colombier #ifndef gs_halftone_DEFINED 357dd7cddfSDavid du Colombier # define gs_halftone_DEFINED 367dd7cddfSDavid du Colombier typedef struct gs_halftone_s gs_halftone; 377dd7cddfSDavid du Colombier 387dd7cddfSDavid du Colombier #endif 397dd7cddfSDavid du Colombier /* 407dd7cddfSDavid du Colombier * gs_halftone structures may have complex substructures. We provide two 417dd7cddfSDavid du Colombier * procedures for setting them. gs_halftone assumes that the gs_halftone 427dd7cddfSDavid du Colombier * structure and all its substructures was allocated with the same allocator 437dd7cddfSDavid du Colombier * as the gs_state; gs_halftone_allocated looks in the structure itself (the 447dd7cddfSDavid du Colombier * rc.memory member) to find the allocator that was used. Both procedures 457dd7cddfSDavid du Colombier * copy the top-level structure (using the appropriate allocator), but take 467dd7cddfSDavid du Colombier * ownership of the substructures. 477dd7cddfSDavid du Colombier */ 48*593dc095SDavid du Colombier int gs_sethalftone(gs_state *, gs_halftone *); 49*593dc095SDavid du Colombier int gs_sethalftone_allocated(gs_state *, gs_halftone *); 50*593dc095SDavid du Colombier int gs_currenthalftone(gs_state *, gs_halftone *); 517dd7cddfSDavid du Colombier 527dd7cddfSDavid du Colombier #endif /* gsht1_INCLUDED */ 53