1 /* Copyright (C) 1997 Aladdin Enterprises. All rights reserved. 2 3 This software is provided AS-IS with no warranty, either express or 4 implied. 5 6 This software is distributed under license and may not be copied, 7 modified or distributed except as expressly authorized under the terms 8 of the license contained in the file LICENSE in this distribution. 9 10 For more information about licensing, please refer to 11 http://www.ghostscript.com/licensing/. For information on 12 commercial licensing, go to http://www.artifex.com/licensing/ or 13 contact Artifex Software, Inc., 101 Lucas Valley Road #110, 14 San Rafael, CA 94903, U.S.A., +1(415)492-9861. 15 */ 16 17 /* $Id: gsalphac.h,v 1.5 2002/06/16 08:45:42 lpd Exp $ */ 18 /* Alpha-compositing interface */ 19 20 #ifndef gsalphac_INCLUDED 21 # define gsalphac_INCLUDED 22 23 #include "gscompt.h" 24 25 /* 26 * Define the compositing operations. These values must match the ones in 27 * dpsNeXT.h. 28 */ 29 typedef enum { 30 composite_Clear = 0, 31 composite_Copy, 32 composite_Sover, 33 composite_Sin, 34 composite_Sout, 35 composite_Satop, 36 composite_Dover, 37 composite_Din, 38 composite_Dout, 39 composite_Datop, 40 composite_Xor, 41 composite_PlusD, 42 composite_PlusL, 43 #define composite_last composite_PlusL 44 composite_Highlight, /* (only for compositerect) */ 45 #define compositerect_last composite_Highlight 46 composite_Dissolve /* (not for PostScript composite operators) */ 47 #define composite_op_last composite_Dissolve 48 } gs_composite_op_t; 49 50 /* 51 * Define parameters for alpha-compositing. 52 */ 53 typedef struct gs_composite_alpha_params_s { 54 gs_composite_op_t op; 55 float delta; /* only for Dissolve */ 56 } gs_composite_alpha_params_t; 57 58 /* Create an alpha-compositing object. */ 59 int gs_create_composite_alpha(gs_composite_t ** ppcte, 60 const gs_composite_alpha_params_t * params, 61 gs_memory_t * mem); 62 63 #endif /* gsalphac_INCLUDED */ 64