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/* Copyright (C) 1995, 1996, 1997, 1998, 1999 Aladdin Enterprises. All rights reserved.
This software is licensed to a single customer by Artifex Software Inc.
under the terms of a specific OEM agreement.
*/
/*$RCSfile$ $Revision$ */
/* Imager state definition */
#ifndef gxistate_INCLUDED
# define gxistate_INCLUDED
#include "gscsel.h"
#include "gsrefct.h"
#include "gsropt.h"
#include "gxcvalue.h"
#include "gxcmap.h"
#include "gxfixed.h"
#include "gxline.h"
#include "gxmatrix.h"
#include "gxtmap.h"
/*
* Define the subset of the PostScript graphics state that the imager
* library API needs. The definition of this subset is subject to change
* as we come to understand better the boundary between the imager and
* the interpreter. In particular, the imager state currently INCLUDES
* the following:
* line parameters: cap, join, miter limit, dash pattern
* transformation matrix (CTM)
* logical operation: RasterOp, transparency
* color modification: alpha, rendering algorithm
* overprint flag
* rendering tweaks: flatness, fill adjustment, stroke adjust flag,
* accurate curves flag, shading smoothness
* color rendering information:
* halftone, halftone phases
* transfer functions
* black generation, undercolor removal
* CIE rendering tables
* halftone and pattern caches
* shared (constant) device color spaces
* The imager state currently EXCLUDES the following:
* graphics state stack
* default CTM
* path
* clipping path and stack
* color specification: color, color space, substitute color spaces
* font
* device
* caches for many of the above
*/
/*
* Define the color rendering state information.
* This should be a separate object (or at least a substructure),
* but making this change would require editing too much code.
*/
/* Opaque types referenced by the color rendering state. */
#ifndef gs_halftone_DEFINED
# define gs_halftone_DEFINED
typedef struct gs_halftone_s gs_halftone;
#endif
#ifndef gx_device_color_DEFINED
# define gx_device_color_DEFINED
typedef struct gx_device_color_s gx_device_color;
#endif
#ifndef gx_device_halftone_DEFINED
# define gx_device_halftone_DEFINED
typedef struct gx_device_halftone_s gx_device_halftone;
#endif
/*
* We need some special memory management for the components of a
* c.r. state, as indicated by the following notations on the elements:
* (RC) means the element is reference-counted.
* (Shared) means the element is shared among an arbitrary number of
* c.r. states and is never freed.
* (Owned) means exactly one c.r. state references the element,
* and it is guaranteed that no references to it will outlive
* the c.r. state itself.
*/
/* Define the interior structure of a transfer function. */
typedef struct gx_transfer_colored_s {
/* The components must be in this order: */
gx_transfer_map *red; /* (RC) */
gx_transfer_map *green; /* (RC) */
gx_transfer_map *blue; /* (RC) */
gx_transfer_map *gray; /* (RC) */
} gx_transfer_colored;
typedef union gx_transfer_s {
gx_transfer_map *indexed[4]; /* (RC) */
gx_transfer_colored colored;
} gx_transfer;
#define gs_color_rendering_state_common\
\
/* Halftone screen: */\
\
gs_halftone *halftone; /* (RC) */\
gs_int_point screen_phase[gs_color_select_count];\
/* dev_ht depends on halftone and device resolution. */\
gx_device_halftone *dev_ht; /* (RC) */\
/* The contents of ht_cache depend on dev_ht. */\
struct gx_ht_cache_s *ht_cache; /* (Shared) by all gstates */\
\
/* Color (device-dependent): */\
\
struct gs_cie_render_s *cie_render; /* (RC) may be 0 */\
gx_transfer_map *black_generation; /* (RC) may be 0 */\
gx_transfer_map *undercolor_removal; /* (RC) may be 0 */\
/* set_transfer holds the transfer functions specified by */\
/* set[color]transfer; effective_transfer includes the */\
/* effects of overrides by TransferFunctions in halftone */\
/* dictionaries. (In Level 1 systems, set_transfer and */\
/* effective_transfer are always the same.) */\
gx_transfer set_transfer; /* members are (RC) */\
gx_transfer effective_transfer; /* see below */\
\
/* Color caches: */\
\
/* cie_joint_caches depend on cie_render and */\
/* the color space. */\
struct gx_cie_joint_caches_s *cie_joint_caches; /* (RC) */\
/* cmap_procs depend on the device's color_info. */\
const struct gx_color_map_procs_s *cmap_procs; /* static */\
/* The contents of pattern_cache depend on the */\
/* the color space and the device's color_info and */\
/* resolution. */\
struct gx_pattern_cache_s *pattern_cache /* (Shared) by all gstates */
/*
* Enumerate the reference-counted pointers in a c.r. state. Note that
* effective_transfer doesn't contribute to the reference count: it points
* either to the same objects as set_transfer, or to objects in a halftone
* structure that someone else worries about.
*/
#define gs_cr_state_do_rc_ptrs(m)\
m(halftone) m(dev_ht) m(cie_render)\
m(black_generation) m(undercolor_removal)\
m(set_transfer.colored.red) m(set_transfer.colored.green)\
m(set_transfer.colored.blue) m(set_transfer.colored.gray)\
m(cie_joint_caches)
/* Enumerate the pointers in a c.r. state. */
#define gs_cr_state_do_ptrs(m)\
m(0,halftone) m(1,dev_ht) m(2,ht_cache)\
m(3,cie_render) m(4,black_generation) m(5,undercolor_removal)\
m(6,set_transfer.colored.red) m(7,set_transfer.colored.green)\
m(8,set_transfer.colored.blue) m(9,set_transfer.colored.gray)\
m(10,effective_transfer.colored.red) m(11,effective_transfer.colored.green)\
m(12,effective_transfer.colored.blue) m(13,effective_transfer.colored.gray)\
m(14,cie_joint_caches) m(15,pattern_cache)
#define st_cr_state_num_ptrs 16
/*
* Define constant values that can be allocated once and shared among
* all imager states in an address space.
*/
#ifndef gs_color_space_DEFINED
# define gs_color_space_DEFINED
typedef struct gs_color_space_s gs_color_space;
#endif
typedef union gx_device_color_spaces_s {
struct dcn_ {
gs_color_space *Gray;
gs_color_space *RGB;
gs_color_space *CMYK;
} named;
gs_color_space *indexed[3];
} gx_device_color_spaces_t;
typedef struct gs_imager_state_shared_s {
rc_header rc;
gx_device_color_spaces_t device_color_spaces;
} gs_imager_state_shared_t;
#define private_st_imager_state_shared() /* in gsistate.c */\
gs_private_st_ptrs3(st_imager_state_shared, gs_imager_state_shared_t,\
"gs_imager_state_shared", imager_state_shared_enum_ptrs,\
imager_state_shared_reloc_ptrs, device_color_spaces.named.Gray,\
device_color_spaces.named.RGB, device_color_spaces.named.CMYK)
/* Define the imager state structure itself. */
#define gs_imager_state_common\
gs_memory_t *memory;\
void *client_data;\
gs_imager_state_shared_t *shared;\
gx_line_params line_params;\
gs_matrix_fixed ctm;\
gs_logical_operation_t log_op;\
gx_color_value alpha;\
bool overprint;\
float flatness;\
gs_fixed_point fill_adjust; /* fattening for fill */\
bool stroke_adjust;\
bool accurate_curves;\
float smoothness;\
const gx_color_map_procs *\
(*get_cmap_procs)(P2(const gs_imager_state *, const gx_device *));\
gs_color_rendering_state_common
#define st_imager_state_num_ptrs\
(st_line_params_num_ptrs + st_cr_state_num_ptrs + 2)
/* Access macros */
#define ctm_only(pis) (*(const gs_matrix *)&(pis)->ctm)
#define ctm_only_writable(pis) (*(gs_matrix *)&(pis)->ctm)
#define set_ctm_only(pis, mat) (*(gs_matrix *)&(pis)->ctm = (mat))
#define gs_init_rop(pis) ((pis)->log_op = lop_default)
#define gs_currentflat_inline(pis) ((pis)->flatness)
#define gs_currentlineparams_inline(pis) (&(pis)->line_params)
#define gs_current_logical_op_inline(pis) ((pis)->log_op)
#define gs_set_logical_op_inline(pis, lop) ((pis)->log_op = (lop))
#ifndef gs_imager_state_DEFINED
# define gs_imager_state_DEFINED
typedef struct gs_imager_state_s gs_imager_state;
#endif
struct gs_imager_state_s {
gs_imager_state_common;
};
/* Initialization for gs_imager_state */
#define gs_imager_state_initial(scale)\
0, 0, 0, { gx_line_params_initial },\
{ scale, 0.0, 0.0, -(scale), 0.0, 0.0 },\
lop_default, gx_max_color_value, 0/*false*/, 1.0,\
{ fixed_half, fixed_half }, 0/*false*/, 0/*false*/, 1.0,\
gx_default_get_cmap_procs
/* The imager state structure is public only for subclassing. */
#define public_st_imager_state() /* in gsistate.c */\
gs_public_st_composite(st_imager_state, gs_imager_state, "gs_imager_state",\
imager_state_enum_ptrs, imager_state_reloc_ptrs)
/* Initialize an imager state, other than the parts covered by */
/* gs_imager_state_initial. */
int gs_imager_state_initialize(P2(gs_imager_state * pis, gs_memory_t * mem));
/* Make a temporary copy of a gs_imager_state. Note that this does not */
/* do all the necessary reference counting, etc. */
gs_imager_state *
gs_imager_state_copy(P2(const gs_imager_state * pis, gs_memory_t * mem));
/* Increment reference counts to note that an imager state has been copied. */
void gs_imager_state_copied(P1(gs_imager_state * pis));
/* Adjust reference counts before assigning one imager state to another. */
void gs_imager_state_pre_assign(P2(gs_imager_state *to,
const gs_imager_state *from));
/* Free device color spaces. Perhaps this should be declared elsewhere? */
void gx_device_color_spaces_free(P3(gx_device_color_spaces_t *pdcs,
gs_memory_t *mem, client_name_t cname));
/* Release an imager state. */
void gs_imager_state_release(P1(gs_imager_state * pis));
#endif /* gxistate_INCLUDED */
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