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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: gsalphac.h,v 1.2 2000/09/19 19:00:25 lpd Exp $ */
- /* Alpha-compositing interface */
-
- #ifndef gsalphac_INCLUDED
- # define gsalphac_INCLUDED
-
- #include "gscompt.h"
-
- /*
- * Define the compositing operations. These values must match the ones in
- * dpsNeXT.h.
- */
- typedef enum {
- composite_Clear = 0,
- composite_Copy,
- composite_Sover,
- composite_Sin,
- composite_Sout,
- composite_Satop,
- composite_Dover,
- composite_Din,
- composite_Dout,
- composite_Datop,
- composite_Xor,
- composite_PlusD,
- composite_PlusL,
- #define composite_last composite_PlusL
- composite_Highlight, /* (only for compositerect) */
- #define compositerect_last composite_Highlight
- composite_Dissolve /* (not for PostScript composite operators) */
- #define composite_op_last composite_Dissolve
- } gs_composite_op_t;
-
- /*
- * Define parameters for alpha-compositing.
- */
- typedef struct gs_composite_alpha_params_s {
- gs_composite_op_t op;
- float delta; /* only for Dissolve */
- } gs_composite_alpha_params_t;
-
- /* Create an alpha-compositing object. */
- int gs_create_composite_alpha(P3(gs_composite_t ** ppcte,
- const gs_composite_alpha_params_t * params,
- gs_memory_t * mem));
-
- #endif /* gsalphac_INCLUDED */
-