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/* Copyright (C) 1997, 2000 Aladdin Enterprises.  All rights reserved.

  This software is provided AS-IS with no warranty, either express or

  implied.

  This software is distributed under license and may not be copied,

  modified or distributed except as expressly authorized under the terms

  of the license contained in the file LICENSE in this distribution.

  For more information about licensing, please refer to

  http://www.ghostscript.com/licensing/. For information on

  commercial licensing, go to http://www.artifex.com/licensing/ or

  contact Artifex Software, Inc., 101 Lucas Valley Road #110,

  San Rafael, CA  94903, U.S.A., +1(415)492-9861.

*/

/* $Id: gxdevcli.h,v 1.41 2005/10/12 17:59:55 leonardo Exp $ */

/* Definitions for device clients */

#ifndef gxdevcli_INCLUDED

#  define gxdevcli_INCLUDED

#include "std.h"		/* for FILE */

#include "stdint_.h"

#include "gscompt.h"

#include "gsdcolor.h"

#include "gsmatrix.h"

#include "gsiparam.h"		/* requires gsmatrix.h */

#include "gsrefct.h"

#include "gsropt.h"

#include "gsstruct.h"

#include "gstparam.h"

#include "gsxfont.h"

#include "gxbitmap.h"

#include "gxcindex.h"

#include "gxcvalue.h"

#include "gxfixed.h"

#include "gxtext.h"

#include "gxcmap.h"

/* See Drivers.htm for documentation of the driver interface. */

#ifndef gx_device_DEFINED

#  define gx_device_DEFINED

typedef struct gx_device_s gx_device;

#endif

/* ---------------- Memory management ---------------- */

/*

 * NOTE: if you write code that creates device instances (either with

 * gs_copydevice or by allocating them explicitly), allocates device

 * instances as either local or static variables (actual instances, not

 * pointers to instances), or sets the target of forwarding devices, please

 * read the following documentation carefully.  The rules for doing these

 * things changed substantially in release 5.68, in a

 * non-backward-compatible way, and unfortunately we could not find a way to

 * make the compiler give an error at places that need changing.

 */

/*

 * Device instances are managed with reference counting: when the last

 * reference to a device from a graphics state or the target field of a

 * forwarding device is removed, the device is normally freed.  However,

 * some device instances are referenced in other ways (for example, from

 * objects in the PostScript interpreter, or from library client code) and

 * will be freed by the garbage collector (if any) or explicitly: they

 * should not be freed by reference counting.  These are called "retained"

 * device instances.  Every device instance remembers whether or not it is

 * retained, and an instance is freed iff its reference count is zero and it

 * is not retained.

 *

 * Normally devices are initialized as not retained.  However, devices

 * initialized by calling gx_device_init(pdev, proto, memory, false), or

 * created by gs_copydevice are marked as retained.  You can also set the

 * retention status of a device explicitly with gx_device_retain(pdev,

 * true-or-false).  Note that if you change a retained device to

 * non-retained, if there are no references to it from graphics states or

 * targets, it will be freed immediately.

 *

 * The preferred technique for creating a new device is now gs_copydevice.

 * There are a number of places in the code where memory is explicitly

 * allocated, then initialized with gx_device_init. These should gradually

 * be replaced.

 *

 * There are 3 ways that a device structure might be allocated:

 *	1) Allocated dynamically, e.g.,

 *		gx_device *pdev_new;

 *		gs_copydevice(&pdev_new, pdev_old, memory);

 *	2) Declared as a local or static variable, e.g.,

 *		gx_device devv;

 *	or

 *		const gx_device devc = ...;

 *	3) Embedded in an object allocated in one of the above ways.

 * If you allocate a device using #2 or #3, you must either mark it as

 * retained by calling gx_device_retain(pdev, true) or initialize it with a

 * NULL memory.  If you do not do this, an attempt will be made to free the

 * device, corrupting memory.  Note that when memory is NULL, the finalize

 * method of the device will not be called when it is freed, so you cannot

 * use it for cleanup.  */

/*

 * Do not set the target of a forwarding device with an assignment like

 *	fdev->target = tdev;

 * You must use the procedure

 *	gx_device_set_target(fdev, tdev);

 * Note that the first argument is a gx_device_forward *, not a gx_device *.

 *

 * We could have changed the member name "target" when this became

 * necessary, so the compiler would flag places that needed editing, but

 * there were literally hundreds of places that only read the target member

 * that we would have had to change, so we decided to leave the name alone.

 */

/* ---------------- Auxiliary types and structures ---------------- */

/* We need at least an abstract type for a graphics state, */

/* which is passed to the page device procedures. */

#ifndef gs_state_DEFINED

#  define gs_state_DEFINED

typedef struct gs_state_s gs_state;

#endif

/* We need abstract types for paths and fill/stroke parameters, */

/* for the path-oriented device procedures. */

#ifndef gx_path_DEFINED

#  define gx_path_DEFINED

typedef struct gx_path_s gx_path;

#endif

#ifndef gx_clip_path_DEFINED

#  define gx_clip_path_DEFINED

typedef struct gx_clip_path_s gx_clip_path;

#endif

#ifndef gx_fill_params_DEFINED

#  define gx_fill_params_DEFINED

typedef struct gx_fill_params_s gx_fill_params;

#endif

#ifndef gx_stroke_params_DEFINED

#  define gx_stroke_params_DEFINED

typedef struct gx_stroke_params_s gx_stroke_params;

#endif

#ifndef gs_imager_state_DEFINED

#  define gs_imager_state_DEFINED

typedef struct gs_imager_state_s gs_imager_state;

#endif

/* We need an abstract type for the image enumeration state, */

/* for begin[_typed]_image. */

#ifndef gx_image_enum_common_t_DEFINED

#  define gx_image_enum_common_t_DEFINED

typedef struct gx_image_enum_common_s gx_image_enum_common_t;

#endif

/* We need an abstract type for the pattern instance, */

/* for pattern_manage. */

#ifndef gs_pattern1_instance_t_DEFINED

#  define gs_pattern1_instance_t_DEFINED

typedef struct gs_pattern1_instance_s gs_pattern1_instance_t;

#endif

/* Define the type for colors passed to the higher-level procedures. */

typedef gx_device_color gx_drawing_color;

/* Define a type for telling get_alpha_bits what kind of object */

/* is being rendered. */

typedef enum {

    go_text,

    go_graphics

} graphics_object_type;

/* Define an edge of a trapezoid.  Requirement: end.y >= start.y. */

typedef struct gs_fixed_edge_s {

    gs_fixed_point start;

    gs_fixed_point end;

} gs_fixed_edge;

/* Define the parameters passed to get_bits_rectangle. */

#ifndef gs_get_bits_params_DEFINED

#  define gs_get_bits_params_DEFINED

typedef struct gs_get_bits_params_s gs_get_bits_params_t;

#endif

/* Define the structure for device color capabilities. */

typedef struct gx_device_anti_alias_info_s {

    int text_bits;		/* 1,2,4 */

    int graphics_bits;		/* ditto */

} gx_device_anti_alias_info;

typedef int32_t frac31; /* A fraction value in [-1,1]. 

    Represents a color (in [0,1]) 

    or a color difference (in [-1,1]) in shadings. */

/* Define an edge of a linear color trapezoid.  Requirement: end.y >= start.y. */

typedef struct gs_linear_color_edge_s {

    gs_fixed_point start;

    gs_fixed_point end;

    const frac31 *c0, *c1;

    fixed clip_x;

} gs_linear_color_edge;

/*

 * Possible values for the separable_and_linear flag in the

 * gx_device_color_info structure. These form an order, with lower

 * values having weaker properties.

 *

 *  GX_CINFO_SEP_LIN_UNKNOWN

 *    The properties of the color encoding are not yet known. This is

 *    always a safe default value.

 *

 *  GX_CINFO_SEP_LIN_NONE

 *    The encoding is not separable and linear. If this value is set,

 *    the device must provide an encode_color method, either directly

 *    or via map_rgb_color/map_cmyk_color methods. This setting is

 *    only legitimate for color models with 4 or fewer components.

 *

 *  GX_CINFO_SEP_LIN

 *    A separable and linear encoding has the separability and

 *    linearity properties.

 *

 *    Encodings with this property are completely characterized 

 *    by the comp_shift array. Hence, there is no need to provide

 *    an encode_color procedure for such devices, though the device

 *    creator may choose to do so for performance reasons (e.g.: when

 *     each color component is assigned a byte).

 */

typedef enum {

    GX_CINFO_UNKNOWN_SEP_LIN = -1,

    GX_CINFO_SEP_LIN_NONE = 0,

    GX_CINFO_SEP_LIN

} gx_color_enc_sep_lin_t;

/*

 * Color model component polarity. An "unknown" value has been added to

 * this enumeration.

 */

typedef enum {

    GX_CINFO_POLARITY_UNKNOWN = -1,

    GX_CINFO_POLARITY_SUBTRACTIVE = 0,

    GX_CINFO_POLARITY_ADDITIVE

} gx_color_polarity_t;

/*

 * Enumerator to indicate if a color model will support overprint mode.

 *

 * Only "DeviceCMYK" color space support this option, but we interpret

 * this designation some broadly: a DeviceCMYK color model is any sub-

 * tractive color model that provides the components Cyan, Magenta,

 * Yellow, and Black, and maps the DeviceCMYK space directly to these

 * components. This includes DeviceCMYK color models with spot colors,

 * and DeviceN color models that support the requisite components (the

 * latter may vary from Adobe's implementations; this is not easily

 * tested).

 *

 * In principle this parameter could be a boolean set at initialization

 * time. Primarily for historical reasons, the determination of whether

 * or not a color model supports overprint is delayed until this

 * information is required, hence the use of an enumeration with an

 * "unknown" setting.

 */

typedef enum {

    GX_CINFO_OPMODE_UNKNOWN = -1,

    GX_CINFO_OPMODE_NOT = 0,

    GX_CINFO_OPMODE

} gx_cm_opmode_t;

/* component index value used to indicate no color component.  */

#define GX_CINFO_COMP_NO_INDEX 0xff

/*

 * Additional possible value for cinfo.gray_index, to indicate which

 * component, if any, qualifies as the "gray" component.

 */

#define GX_CINFO_COMP_INDEX_UNKNOWN 0xfe

/*

 * The enlarged color model information structure: Some of the

 * information that was implicit in the component number in

 * the earlier conventions (component names, polarity, mapping

 * functions) are now explicitly provided.

 *

 * Also included is some information regarding the encoding of

 * color information into gx_color_index. Some of this information

 * was previously gathered indirectly from the mapping

 * functions in the existing code, specifically to speed up the

 * halftoned color rendering operator (see

 * gx_dc_ht_colored_fill_rectangle in gxcht.c). The information

 * is now provided explicitly because such optimizations are

 * more critical when the number of color components is large.

 *

 * Note: no pointers have been added to this structure, so there

 *       is no requirement for a structure descriptor.

 */

typedef struct gx_device_color_info_s {

    /*

     * max_components is the maximum number of components for all

     * color models supported by this device. This does not include

     * any alpha components.

     */

    int max_components;

    /*

     * The number of color components. This does not include any

     * alpha-channel information, which may be integrated into

     * the gx_color_index but is otherwise passed as a separate

     * component.

     */

    int num_components;

    /*

     * Polarity of the components of the color space, either

     * additive or subtractive. This is used to interpret transfer

     * functions and halftone threshold arrays. Possible values

     * are GX_CM_POLARITY_ADDITIVE or GX_CM_POLARITY_SUBTRACTIVE

     */

    gx_color_polarity_t polarity;

    /*

     * The number of bits of gx_color_index actually used. 

     * This must be <= arch_sizeof_color_index, which is usually 64.

     */

    byte depth;

    /*

     * Index of the gray color component, if any. The max_gray and

     * dither_gray values apply to this component only; all other

     * components use the max_color and dither_color values.

     * 

     * Note:  This field refers to a 'gray' colorant because of the

     * past use of the max_gray/color and dither_grays/colors fields.

     * Prior to 8.00, the 'gray' values were used for monochrome

     * devices and the 'color' values for RGB and CMYK devices.

     * Ideally we would like to have the flexibiiity of allowing

     * different numbers of intensity levels for each colorant.

     * However this is not compatible with the pre 8.00 devices.

     * With post 8.00 devices, we can have two different numbers of

     * intensity levels.  For one colorant (which is specified by

     * the gray_index) we will use the max_gray/dither_grays values.

     * The remaining colorants will use the max_color/dither_colors

     * values.  The colorant which is specified by the gray_index

     * value does not have to be gray or black.  For example if we

     * have an RGB device and we want 32 intensity levels for red and

     * blue and 64 levels for green, then we can set gray_index to

     * 1 (the green colorant), set max_gray to 63 and dither_grays to

     * 64, and set max_color to 31 and dither_colors to 32.

     *

     * This will be GX_CINFO_COMP_NO_INDEX if there is no 'gray' 

     * component.

     */

    byte gray_index;

    /*

     * max_gray and max_color are the number of distinct native

     * intensity levels, less 1, for the 'gray' and all other color

     * components, respectively. For nearly all current devices

     * that support both 'gray' and non-'gray' components, the two

     * parameters have the same value.  (See comment for gray_index.)

     *

     * dither_grays and dither_colors are the number of intensity

     * levels between which halftoning can occur, for the 'gra'y and

     * all other color components, respectively. This is

     * essentially redundant information: in all reasonable cases,

     * dither_grays = max_gray + 1 and dither_colors = max_color + 1.

     * These parameters are, however, extensively used in the

     * current code, and thus have been retained.

     *

     * Note that the non-'gray' values may now be relevant even if

     * num_components == 1. This simplifies the handling of devices

     * with configurable color models which may be set for a single

     * non-'gray' color model.

     */

    uint max_gray;		/* # of distinct color levels -1 */

    uint max_color;

    uint dither_grays;

    uint dither_colors;

    /*

     * Information to control super-sampling of objects to support

     * anti-aliasing.

     */

    gx_device_anti_alias_info anti_alias;

    /*

     * Flag to indicate if gx_color_index for this device may be divided

     * into individual fields for each component. This is almost always

     * the case for printers, and is the case for most modern displays

     * as well. When this is the case, halftoning may be performed

     * separately for each component, which greatly simplifies processing

     * when the number of color components is large.

     *

     * If the gx_color_index is separable in this manner, the comp_shift

     * array provides the location of the low-order bit for each

     * component. This may be filled in by the client, but need not be.

     * If it is not provided, it will be calculated based on the values

     * in the max_gray and max_color fields as follows:

     *

     *     comp_shift[num_components - 1] = 0,

     *     comp_shift[i] = comp_shift[i + 1]

     *                      + ( i == gray_index ? ceil(log2(max_gray + 1))

     *                                          : ceil(log2(max_color + 1)) )

     *

     * The comp_mask and comp_bits fields should be left empty by the client.

     * They will be filled in during initialization using the following

     * mechanism:

     *

     *     comp_bits[i] = ( i == gray_index ? ceil(log2(max_gray + 1))

     *                                      : ceil(log2(max_color + 1)) )

     *

     *     comp_mask[i] = (((gx_color_index)1 << comp_bits[i]) - 1)

     *                       << comp_shift[i]

     *

     * (For current devices, it is almost always the case that

     * max_gray == max_color, if the color model contains both gray and

     * non-gray components.)

     *

     * If separable_and_linear is not set, the data in the other fields

     * is unpredictable and should be ignored.

     */

    gx_color_enc_sep_lin_t separable_and_linear;

    byte                   comp_shift[GX_DEVICE_COLOR_MAX_COMPONENTS];

    byte                   comp_bits[GX_DEVICE_COLOR_MAX_COMPONENTS];

    gx_color_index         comp_mask[GX_DEVICE_COLOR_MAX_COMPONENTS];

    /*

     * Pointer to name for the process color model.

     */

    const char * cm_name;

    /*

     * Indicate if overprint mode is supported. This is only supported

     * for color models that have "DeviceCMYK" like behaivor: they support

     * the cyan, magenta, yellow, and black color components, and map the

     * components of a DeviceCMYK color space directly to these compoents.

     * Most such color spaces will have the name DeviceCMYK, but it is

     * also possible for DeviceN color models this behavior.

     *

     * If opmode has the value GX_CINFO_OPMODE, the process_comps will

     * be a bit mask, with the (1 << i) bit set if i'th component is the

     * cyan, magenta, yellow, or black component.

     */

    gx_cm_opmode_t opmode;

    gx_color_index process_comps;

} gx_device_color_info;

/* NB encoding flag ignored */

#define dci_extended_alpha_values(mcmp, nc, p, d, gi, mg, \

		        mc, dg, dc, ta, ga, sl, cn)   \

    {mcmp /* max components */, \

     nc /* number components */, \

     p /* polarity */, \

     d /* depth */, \

     gi /* gray index */, \

     mg /* max gray */, \

     mc /* max color */, \

     dg /* dither grays */, \

     dc /* dither colors */, \

     { ta, ga } /* antialias info text, graphics */, \

     sl /* separable_and_linear */, \

     { 0 } /* component shift */, \

     { 0 } /* component bits */, \

     { 0 } /* component mask */, \

     cn /* process color name */,\

     GX_CINFO_OPMODE_UNKNOWN /* opmode */,\

/*

 * The "has color" macro requires a slightly different definition

 * with the more general color models.

 */

#define gx_device_has_color(dev)                           \

   ( (dev)->color_info.num_components > 1 ||                \

     (dev)->color_info.gray_index == GX_CINFO_COMP_NO_INDEX )

/* parameter initialization macros for backwards compatibility */

/*

 * These macros are needed to define values for fields added when

 * DeviceN compatibility was added.  Previously the graphics

 * library and the much of the device code examined the number of

 * components and assume that 1 --> DeviceGray, 3-->DeviceRGB,

 * and 4--> DeviceCMYK.  Since the old device code does not

 * specify a color model, these macros make the same assumption.

 * This assumption is incorrect for a DeviceN device and thus

 * the following macros should not be used.  The previously

 * defined macros should be used for new devices.

 */

#define dci_std_cm_name(nc)                 \

    ( (nc) == 1 ? "DeviceGray"              \

                : ((nc) == 3 ? "DeviceRGB"  \

                             : "DeviceCMYK") )

#define dci_std_polarity(nc)                    \

    ( (nc) == 4 ? GX_CINFO_POLARITY_SUBTRACTIVE \

                : GX_CINFO_POLARITY_ADDITIVE )

      /*

       * Get the default gray_index value, based on the number of color

       * components. Note that this must be consistent with the index

       * implicitly used by the get_color_comp_index method and the

       * procedures in the structure returned by the

       * get_color_mapping_procs method.

       */

#define dci_std_gray_index(nc)    \

    ((nc) == 3 ? GX_CINFO_COMP_NO_INDEX : (nc) - 1)

#define dci_alpha_values(nc, depth, mg, mc, dg, dc, ta, ga) \

    dci_extended_alpha_values(nc, nc,			    \

                              dci_std_polarity(nc),         \

                              depth,                        \

                              dci_std_gray_index(nc),       \

                              mg, mc, dg, dc, ta, ga,       \

                              GX_CINFO_UNKNOWN_SEP_LIN,     \

			      dci_std_cm_name(nc) )

/*

 * Determine the depth corresponding to a color_bits specification.

 * Note that color_bits == 0 ==> depth == 0; surprisingly this

 * case is used.

*/

#define dci_std_color_depth(color_bits)   \

    ((color_bits) == 1 ? 1 : ((color_bits) + 7) & ~7)

/*

 * Determine the number of components corresponding to a color_bits

 * specification. A device is monochrome only if it is bi-level;

 * the 4 and 8 bit cases are handled as mapped color displays (for

 * compatibility with existing code). The peculiar color_bits = 0

 * case is considered monochrome, for no apparent reason.

 */

#define dci_std_color_num_components(color_bits)      \

    ( (color_bits) <= 1 ? 1                           \

                      : ((color_bits) % 3 == 0 ||     \

                         (color_bits) == 4     ||     \

                         (color_bits) == 8       ) ? 3 : 4 )

/*

 * The number of bits assigned to the gray/black color component,

 * assuming there is such a component. The underlying assumption

 * is that any extra bits are assigned to this component.

 */

#define dci_std_gray_bits(nc, color_bits)    \

    ((color_bits) - ((nc) - 1) * ((color_bits) / (nc)))

/*

 * The number of bits assigned to a color component. The underlying

 * assumptions are that there is a gray component if nc != 3, and

 * that the gray component uses any extra bits.

 */

#define dci_std_color_bits(nc, color_bits)                        \

    ( (nc) == 3                                                   \

        ? (color_bits) / (nc)                                     \

        : ( (nc) == 1                                             \

              ? 0                                                 \

              : ((color_bits) - dci_std_gray_bits(nc, color_bits))\

                     / ((nc) == 1 ? (1) : (nc) - 1) ) )

/*

 * Determine the max_gray and max_color values based on the number

 * of components and the color_bits value. See the comments above

 * for information on the underlying assumptions.

 */

#define dci_std_color_max_gray(nc, color_bits)            \

    ( (nc) == 3                                           \

        ? 0                                               \

        : (1 << dci_std_gray_bits(nc, color_bits)) - 1 ) 

#define dci_std_color_max_color(nc, color_bits)               \

    ( (nc) == 1                                               \

        ? 0                                                   \

        : (1 << dci_std_color_bits(nc, color_bits)) - 1 )

/*

 * Define a color model based strictly on the number of bits

 * available for color representation. Please note, this is only

 * intended to work for a limited set of devices.

 */

#define dci_std_color_(nc, color_bits)                        \

    dci_values( nc,                                           \

                dci_std_color_depth(color_bits),              \

                dci_std_color_max_gray(nc, color_bits),       \

                dci_std_color_max_color(nc, color_bits),      \

                dci_std_color_max_gray(nc, color_bits) + 1,   \

                dci_std_color_max_color(nc, color_bits) + 1 )

#define dci_std_color(color_bits)                             \

    dci_std_color_( dci_std_color_num_components(color_bits), \

                    color_bits )

#define dci_values(nc,depth,mg,mc,dg,dc)\

  dci_alpha_values(nc, depth, mg, mc, dg, dc, 1, 1)

#define dci_black_and_white dci_std_color(1)

#define dci_black_and_white_() dci_black_and_white

#define dci_color(depth,maxv,dither)\

  dci_values(3, depth, maxv, maxv, dither, dither)

/*

 * Macro to access the name of the process color model.

 */

#define get_process_color_model_name(dev) \

    ((dev)->color_info.cm_name)

/* Structure for device procedures. */

typedef struct gx_device_procs_s gx_device_procs;

/* Structure for page device procedures. */

/* Note that these take the graphics state as a parameter. */

typedef struct gx_page_device_procs_s {

#define dev_page_proc_install(proc)\

  int proc(gx_device *dev, gs_state *pgs)

    dev_page_proc_install((*install));

#define dev_page_proc_begin_page(proc)\

  int proc(gx_device *dev, gs_state *pgs)

    dev_page_proc_begin_page((*begin_page));

#define dev_page_proc_end_page(proc)\

  int proc(gx_device *dev, int reason, gs_state *pgs)

    dev_page_proc_end_page((*end_page));

} gx_page_device_procs;

/* Default procedures */

dev_page_proc_install(gx_default_install);

dev_page_proc_begin_page(gx_default_begin_page);

dev_page_proc_end_page(gx_default_end_page);

/* ---------------- Device structure ---------------- */

/*

 * Define the generic device structure.  The device procedures can

 * have two different configurations:

 * 

 *      - Statically initialized devices predating release 2.8.1

 *      set the static_procs pointer to point to a separate procedure record,

 *      and do not initialize procs.

 *

 *      - Statically initialized devices starting with release 2.8.1,

 *      and all dynamically created device instances,

 *      set the static_procs pointer to 0, and initialize procs.

 *

 * The gx_device_set_procs procedure converts the first of these to

 * the second, which is what all client code starting in 2.8.1 expects

 * (using the procs record, not the static_procs pointer, to call the

 * driver procedures).

 *

 * The choice of the name Margins (rather than, say, HWOffset), and the

 * specification in terms of a default device resolution rather than

 * 1/72" units, are due to Adobe.

 *

 * ****** NOTE: If you define any subclasses of gx_device, you *must* define

 * ****** the finalization procedure as gx_device_finalize.  Finalization

 * ****** procedures are not automatically inherited.

 */

typedef struct gx_device_cached_colors_s {

    gx_color_index black, white;

} gx_device_cached_colors_t;

#define gx_device_common\

	int params_size;		/* OBSOLETE if stype != 0: */\

					/* size of this structure */\

	const gx_device_procs *static_procs;	/* OBSOLETE */\

					/* pointer to procs */\

	const char *dname;		/* the device name */\

	gs_memory_t *memory;		/* (0 iff static prototype) */\

	gs_memory_type_ptr_t stype;	/* memory manager structure type, */\

					/* may be 0 if static prototype */\

	bool stype_is_dynamic;		/* if true, free the stype when */\

					/* freeing the device */\

	void (*finalize)(gx_device *);  /* finalization to execute */\

					/* before closing device, if any */\

	rc_header rc;			/* reference count from gstates */\

					/* and targets, +1 if retained */\

	bool retained;			/* true if retained */\

	bool is_open;			/* true if device has been opened */\

	int max_fill_band;		/* limit on band size for fill, */\

					/* must be 0 or a power of 2 */\

					/* (see gdevabuf.c for more info) */\

	gx_device_color_info color_info;	/* color information */\

	gx_device_cached_colors_t cached_colors;\

	int width;			/* width in pixels */\

	int height;			/* height in pixels */\

        int TrayOrientation;            /* default 0 ( 90 180 270 ) if device supports */\

	float MediaSize[2];		/* media dimensions in points */\

	float ImagingBBox[4];		/* imageable region in points */\

	  bool ImagingBBox_set;\

	float HWResolution[2];		/* resolution, dots per inch */\

	float MarginsHWResolution[2];	/* resolution for Margins */\

	float Margins[2];		/* offset of physical page corner */\

					/* from device coordinate (0,0), */\

					/* in units given by MarginsHWResolution */\

	float HWMargins[4];		/* margins around imageable area, */\

					/* in default user units ("points") */\

	long PageCount;			/* number of pages written */\

	long ShowpageCount;		/* number of calls on showpage */\

	int NumCopies;\

	  bool NumCopies_set;\

	bool IgnoreNumCopies;		/* if true, force num_copies = 1 */\

	bool UseCIEColor;		/* for PS LL3 */\

	bool LockSafetyParams;		/* If true, prevent unsafe changes */\

	gx_page_device_procs page_procs;	/* must be last */\

		/* end of std_device_body */\

	gx_device_procs procs	/* object procedures */

/*

 * Note: x/y_pixels_per_inch are here only for backward compatibility.

 * They should not be used in new code.

 */

#define x_pixels_per_inch HWResolution[0]

#define y_pixels_per_inch HWResolution[1]

#define offset_margin_values(x, y, left, bot, right, top)\

  {x, y}, {left, bot, right, top}

#define margin_values(left, bot, right, top)\

  offset_margin_values(0, 0, left, bot, right, top)

#define no_margins margin_values(0, 0, 0, 0)

#define no_margins_() no_margins

/* Define macros that give the page offset ("Margins") in inches. */

#define dev_x_offset(dev) ((dev)->Margins[0] / (dev)->MarginsHWResolution[0])

#define dev_y_offset(dev) ((dev)->Margins[1] / (dev)->MarginsHWResolution[1])

#define dev_y_offset_points(dev) (dev_y_offset(dev) * 72.0)

/* Note that left/right/top/bottom are defined relative to */

/* the physical paper, not the coordinate system. */

/* For backward compatibility, we define macros that give */

/* the margins in inches. */

#define dev_l_margin(dev) ((dev)->HWMargins[0] / 72.0)

#define dev_b_margin(dev) ((dev)->HWMargins[1] / 72.0)

#define dev_b_margin_points(dev) ((dev)->HWMargins[1])

#define dev_r_margin(dev) ((dev)->HWMargins[2] / 72.0)

#define dev_t_margin(dev) ((dev)->HWMargins[3] / 72.0)

#define dev_t_margin_points(dev) ((dev)->HWMargins[3])

/* The extra () are to prevent premature expansion. */

#define open_init_closed() 0 /*false*/, 0	/* max_fill_band */

#define open_init_open() 1 /*true*/, 0	/* max_fill_band */

/* Accessors for device procedures */

#define dev_proc(dev, p) ((dev)->procs.p)

#define set_dev_proc(dev, p, proc) ((dev)->procs.p = (proc))

#define fill_dev_proc(dev, p, dproc)\

  if ( dev_proc(dev, p) == 0 ) set_dev_proc(dev, p, dproc)

#define assign_dev_procs(todev, fromdev)\

  ((todev)->procs = (fromdev)->procs)

/* ---------------- Device procedures ---------------- */

/* Define an opaque type for parameter lists. */

#ifndef gs_param_list_DEFINED

#  define gs_param_list_DEFINED

typedef struct gs_param_list_s gs_param_list;

#endif

/*

 * Definition of device procedures.

 * Note that the gx_device * argument is not declared const,

 * because many drivers maintain dynamic state in the device structure.

 * Note also that the structure is defined as a template, so that

 * we can instantiate it with device subclasses.

 * Because C doesn't have real templates, we must do this with macros.

 */

/* Define macros for declaring device procedures. */

#define dev_t_proc_open_device(proc, dev_t)\

  int proc(dev_t *dev)

#define dev_proc_open_device(proc)\

  dev_t_proc_open_device(proc, gx_device)

#define dev_t_proc_get_initial_matrix(proc, dev_t)\

  void proc(dev_t *dev, gs_matrix *pmat)

#define dev_proc_get_initial_matrix(proc)\

  dev_t_proc_get_initial_matrix(proc, gx_device)

#define dev_t_proc_sync_output(proc, dev_t)\

  int proc(dev_t *dev)

#define dev_proc_sync_output(proc)\

  dev_t_proc_sync_output(proc, gx_device)

#define dev_t_proc_output_page(proc, dev_t)\

  int proc(dev_t *dev, int num_copies, int flush)

#define dev_proc_output_page(proc)\

  dev_t_proc_output_page(proc, gx_device)

#define dev_t_proc_close_device(proc, dev_t)\

  int proc(dev_t *dev)

#define dev_proc_close_device(proc)\

  dev_t_proc_close_device(proc, gx_device)

#define dev_t_proc_map_rgb_color(proc, dev_t)\

  gx_color_index proc(dev_t *dev, const gx_color_value cv[])

#define dev_proc_map_rgb_color(proc)\

  dev_t_proc_map_rgb_color(proc, gx_device)

#define dev_t_proc_map_color_rgb(proc, dev_t)\

  int proc(dev_t *dev,\

    gx_color_index color, gx_color_value rgb[3])

#define dev_proc_map_color_rgb(proc)\

  dev_t_proc_map_color_rgb(proc, gx_device)

#define dev_t_proc_fill_rectangle(proc, dev_t)\

  int proc(dev_t *dev,\

    int x, int y, int width, int height, gx_color_index color)

#define dev_proc_fill_rectangle(proc)\

  dev_t_proc_fill_rectangle(proc, gx_device)

#define dev_t_proc_tile_rectangle(proc, dev_t)\

  int proc(dev_t *dev,\

    const gx_tile_bitmap *tile, int x, int y, int width, int height,\

    gx_color_index color0, gx_color_index color1,\

    int phase_x, int phase_y)