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- /* Copyright (C) 1996 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: gxstate.h,v 1.2 2000/09/19 19:00:40 lpd Exp $ */
- /* Internal graphics state API */
-
- #ifndef gxstate_INCLUDED
- # define gxstate_INCLUDED
-
- /* Opaque type for a graphics state */
- #ifndef gs_state_DEFINED
- # define gs_state_DEFINED
- typedef struct gs_state_s gs_state;
-
- #endif
-
- /*
- * The interfaces in this file are for internal use only, primarily by the
- * interpreter. They are not guaranteed to remain stable from one release
- * to another.
- */
-
- /* Memory and save/restore management */
- gs_memory_t *gs_state_memory(P1(const gs_state *));
- gs_state *gs_state_saved(P1(const gs_state *));
- gs_state *gs_state_swap_saved(P2(gs_state *, gs_state *));
- gs_memory_t *gs_state_swap_memory(P2(gs_state *, gs_memory_t *));
-
- /*
- * "Client data" interface for graphics states.
- *
- * As of release 4.36, the copy procedure is superseded by copy_for
- * (although it will still be called if there is no copy_for procedure).
- */
- typedef void *(*gs_state_alloc_proc_t) (P1(gs_memory_t * mem));
- typedef int (*gs_state_copy_proc_t) (P2(void *to, const void *from));
- typedef void (*gs_state_free_proc_t) (P2(void *old, gs_memory_t * mem));
- typedef enum {
- copy_for_gsave, /* from = current, to = new(saved) */
- copy_for_grestore, /* from = saved, to = current */
- copy_for_gstate, /* from = current, to = new(copy) */
- copy_for_setgstate, /* from = stored, to = current */
- copy_for_copygstate, /* from & to are specified explicitly */
- copy_for_currentgstate /* from = current, to = stored */
- } gs_state_copy_reason_t;
-
- /* Note that the 'from' argument of copy_for is not const. */
- /* This is deliberate -- some clients need this. */
- typedef int (*gs_state_copy_for_proc_t) (P3(void *to, void *from,
- gs_state_copy_reason_t reason));
- typedef struct gs_state_client_procs_s {
- gs_state_alloc_proc_t alloc;
- gs_state_copy_proc_t copy;
- gs_state_free_proc_t free;
- gs_state_copy_for_proc_t copy_for;
- } gs_state_client_procs;
- void gs_state_set_client(P3(gs_state *, void *, const gs_state_client_procs *));
-
- /* gzstate.h redefines the following: */
- #ifndef gs_state_client_data
- void *gs_state_client_data(P1(const gs_state *));
-
- #endif
-
- #endif /* gxstate_INCLUDED */
-