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- /* Copyright (C) 1989, 1992 Aladdin Enterprises. All rights reserved.
-
- This file is part of Ghostscript.
-
- Ghostscript is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY. No author or distributor accepts responsibility
- to anyone for the consequences of using it or for whether it serves any
- particular purpose or works at all, unless he says so in writing. Refer
- to the Ghostscript General Public License for full details.
-
- Everyone is granted permission to copy, modify and redistribute
- Ghostscript, but only under the conditions described in the Ghostscript
- General Public License. A copy of this license is supposed to have been
- given to you along with Ghostscript so you can know your rights and
- responsibilities. It should be in a file named COPYING. Among other
- things, the copyright notice and this notice must be preserved on all
- copies. */
-
- /* state.h */
- /* Ghostscript interpreter graphics state definition */
-
- /* Note that from the interpreter's point of view, */
- /* the graphics state is opaque, i.e. the interpreter is */
- /* just another client of the library. */
-
- /* The interpreter requires additional items in the graphics state. */
- /* These are "client data" from the library's point of view. */
- /* Note that they are all refs. */
-
- typedef struct int_gstate_s int_gstate;
-
- /* Most of the complexity in the interpreter state comes from */
- /* the parameters associated with the various Level 2 color spaces. */
-
- /* CIE transformation procedures */
- typedef struct ref_cie_procs_s {
- union {
- ref ABC;
- ref A;
- } Decode;
- ref DecodeLMN;
- } ref_cie_procs;
- /* CIE rendering transformation procedures */
- typedef struct ref_cie_render_procs_s {
- ref TransformPQR, EncodeLMN, EncodeABC, RenderTableT;
- } ref_cie_render_procs;
-
- /* Separation name and tint transform */
- typedef struct ref_separation_params_s {
- ref layer_name, tint_transform;
- } ref_separation_params;
-
- /* All color space parameters. */
- /* All of these are optional. */
- /* Note that they may actually be the parameters for an underlying or */
- /* alternate space for a special space. */
- typedef struct ref_color_procs_s {
- ref_cie_procs cie;
- union {
- ref_separation_params separation;
- ref index_proc;
- } special;
- } ref_color_procs;
- typedef struct ref_colorspace_s {
- ref array; /* color space (array), */
- /* only relevant if the current */
- /* color space has parameters associated with it. */
- ref_color_procs procs; /* associated procedures/parameters, */
- /* only relevant for CIE, Separation, Indexed/CIE, */
- /* or a Pattern with one of the above */
- } ref_colorspace;
-
- struct int_gstate_s {
- /* Screen_procs are only relevant if setscreen was */
- /* executed more recently than sethalftone */
- /* (for this graphics context). */
- struct {
- ref red, green, blue, gray;
- } screen_procs, /* halftone screen procedures */
- transfer_procs; /* transfer procedures */
- ref black_generation; /* (procedure) */
- ref undercolor_removal; /* (procedure) */
- ref font; /* font object (dictionary) */
- ref_colorspace colorspace;
- /* Pattern is only relevant if the current color space */
- /* is a pattern space. */
- ref pattern; /* pattern (dictionary) */
- struct {
- ref dict; /* CIE color rendering dictionary */
- ref_cie_render_procs procs; /* (see above) */
- } colorrendering;
- /* Halftone is only relevant if sethalftone was executed */
- /* more recently than setscreen for this graphics context. */
- /* setscreen sets it to null. */
- ref halftone; /* halftone (dictionary) */
- };
- /* Enumerate the refs in an int_gstate. */
- /* Since all the elements of an int_gstate are refs, this is simple. */
- #define int_gstate_map_refs(p,m)\
- { register ref *rp_ = (ref *)(p);\
- register int i = sizeof(int_gstate) / sizeof(ref);\
- do { m(rp_); ++rp_; } while ( --i );\
- }
-
- /* The current instances. */
- extern int_gstate istate;
- extern gs_state *igs;
-