/* Copyright (C) 2001-2022 Artifex Software, Inc.
   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.

   Refer to licensing information at http://www.artifex.com or contact
   Artifex Software, Inc.,  1305 Grant Avenue - Suite 200, Novato,
   CA 94945, U.S.A., +1(415)492-9861, for further information.
*/


/* Definitions for device implementors */

#ifndef gxdevice_INCLUDED
#  define gxdevice_INCLUDED

#include "stdio_.h"             /* for FILE */
#include "gxdevcli.h"
#include "gsfname.h"
#include "gsparam.h"
/*
 * Many drivers still use gs_malloc and gs_free, so include the interface
 * for these.  (Eventually they should go away.)
 */
#include "gsmalloc.h"
/*
 * Similarly, quite a few drivers reference stdout and/or stderr.
 * (Eventually these references must go away.)
 */
#include "gxstdio.h"

/*
 * 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 documentation in gxdevcli.h about memory management for devices.
 * 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.
 */

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

/* Define default pages sizes. */
/* U.S. letter paper (8.5" x 11"). */
#define DEFAULT_WIDTH_10THS_US_LETTER 85
#define DEFAULT_HEIGHT_10THS_US_LETTER 110
/* A4 paper (210mm x 297mm), we use 595pt x 842pt. */
#define DEFAULT_WIDTH_10THS_A4 82.6389f
#define DEFAULT_HEIGHT_10THS_A4 116.9444f
/* Choose a default.  A4 may be set in the makefile. */
#ifdef A4
#  define DEFAULT_WIDTH_10THS DEFAULT_WIDTH_10THS_A4
#  define DEFAULT_HEIGHT_10THS DEFAULT_HEIGHT_10THS_A4
#else
#  define DEFAULT_WIDTH_10THS DEFAULT_WIDTH_10THS_US_LETTER
#  define DEFAULT_HEIGHT_10THS DEFAULT_HEIGHT_10THS_US_LETTER
#endif

/* Define parameters for machines with little dinky RAMs.... */
#if ARCH_SMALL_MEMORY
#   define MAX_BITMAP 32000
#   define BUFFER_SPACE 25000
#   define MIN_MEMORY_LEFT 32000
#else
#   define MAX_BITMAP 10000000L /* reasonable on most modern hosts */
#   define BUFFER_SPACE 4000000L
#   define MIN_MEMORY_LEFT 500000L
#endif
#define MIN_BUFFER_SPACE 10000	/* give up if less than this */

#ifndef MaxPatternBitmap_DEFAULT
#  define MaxPatternBitmap_DEFAULT MAX_BITMAP
#endif

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

/*
 * To insulate statically defined device templates from the
 * consequences of changes in the device structure, the following macros
 * must be used for generating initialized device structures.
 *
 * The computations of page width and height in pixels should really be
 *      ((int)(page_width_inches*x_dpi))
 * but some compilers (the Ultrix 3.X pcc compiler and the HPUX compiler)
 * can't cast a computed float to an int.  That's why we specify
 * the page width and height in inches/10 instead of inches.
 * This has been now been changed to use floats.
 *
 * Note that the macro is broken up so as to be usable for devices that
 * add further initialized state to the generic device.
 * Note also that the macro does not initialize procs, which is
 * the next element of the structure.
 */
    #define std_device_part1_(devtype, init, dev_name, stype, open_init)\
        sizeof(devtype), init, dev_name,\
        0 /*memory*/, stype, 0 /*stype_is_dynamic*/, 0 /*finalize*/,\
        { 0 } /*rc*/, 0 /*retained*/, 0 /* parent */, 0 /* child */, 0 /* subclass_data */, 0 /* PageList */,\
        open_init() /*is_open, max_fill_band*/
        /* color_info goes here */
/*
 * The MetroWerks compiler has some bizarre bug that produces a spurious
 * error message if the width and/or height are defined as 0 below,
 * unless we use the +/- workaround in the next macro.
 */
#define std_device_part2_(width, height, x_dpi, y_dpi)\
        { gx_no_color_index, gx_no_color_index },\
          width, height, 0/*Pad*/, 0/*align*/, 0/*Num planes*/, 0/*TrayOrientation*/,\
        { (float)((((width) * 72.0 + 0.5) - 0.5) / (x_dpi))/*MediaSize[0]*/,\
          (float)((((height) * 72.0 + 0.5) - 0.5) / (y_dpi))/*MediaSize[1]*/},\
        { 0, 0, 0, 0 }/*ImagingBBox*/, 0/*ImagingBBox_set*/,\
        { x_dpi, y_dpi }/*HWResolution*/

/* offsets and margins go here */
#define std_device_part3_sc(ins, bp, ep)\
        0/*FirstPage*/, 0/*LastPage*/, 0/*PageHandlerPushed*/, 0/*DisablePageHandler*/,\
        0/* Object Filter*/, 0/*ObjectHandlerPushed*/,\
        0, /* NupControl */ 0, /* NupHandlerPushed */\
        0/*PageCount*/, 0/*ShowpageCount*/, 1/*NumCopies*/, 0/*NumCopies_set*/,\
        0/*IgnoreNumCopies*/, 0/*UseCIEColor*/, 0/*LockSafetyParams*/,\
        0/*band_offset_x*/, 0/*band_offset_y*/, false /*BLS_force_memory*/, \
        {false}/* sgr */,\
        0/* MaxPatternBitmap */, 0/*page_uses_transparency*/, 0/*page_uses_overprint*/,\
        { MAX_BITMAP, BUFFER_SPACE,\
             { BAND_PARAMS_INITIAL_VALUES },\
           0/*false*/, /* params_are_read_only */\
           BandingAuto /* banding_type */\
        }, /*space_params*/\
        0/*Profile Array*/,\
        0/* graphics_type_tag default GS_UNTOUCHED_TAG */,\
        1/* interpolate_control default 1, uses image /Interpolate flag, full device resolution */,\
        { ins, bp, ep }
#define std_device_part3_()\
        std_device_part3_sc(gx_default_install, gx_default_begin_page, gx_default_end_page)

/*
 * We need a number of different variants of the std_device_ macro simply
 * because we can't pass the color_info or offsets/margins
 * as macro arguments, which in turn is because of the early macro
 * expansion issue noted in stdpre.h.  The basic variants are:
 *      ...body_with_macros_, which uses 0-argument macros to supply
 *        open_init, color_info, and offsets/margins;
 *      ...full_body, which takes 12 values (6 for dci_values,
 *        6 for offsets/margins);
 *      ...color_full_body, which takes 9 values (3 for dci_color,
 *        6 for margins/offset).
 *      ...std_color_full_body, which takes 7 values (1 for dci_std_color,
 *        6 for margins/offset).
 *
 */
#define std_device_body_with_macros_(dtype, init, dname, stype, w, h, xdpi, ydpi, open_init, dci_macro, margins_macro)\
        std_device_part1_(dtype, init, dname, stype, open_init),\
        dci_macro(),\
        std_device_part2_(w, h, xdpi, ydpi),\
        margins_macro(),\
        std_device_part3_()

#define std_device_std_body_type(dtype, init, dname, stype, w, h, xdpi, ydpi)\
        std_device_body_with_macros_(dtype, init, dname, stype,\
          w, h, xdpi, ydpi,\
          open_init_closed, dci_black_and_white_, no_margins_)

#define std_device_std_body(dtype, init, dname, w, h, xdpi, ydpi)\
        std_device_std_body_type(dtype, init, dname, 0, w, h, xdpi, ydpi)

#define std_device_std_body_type_open(dtype, init, dname, stype, w, h, xdpi, ydpi)\
        std_device_body_with_macros_(dtype, init, dname, stype,\
          w, h, xdpi, ydpi,\
          open_init_open, dci_black_and_white_, no_margins_)

#define std_device_std_body_open(dtype, init, dname, w, h, xdpi, ydpi)\
        std_device_std_body_type_open(dtype, init, dname, 0, w, h, xdpi, ydpi)

#define std_device_full_body_type(dtype, init, dname, stype, w, h, xdpi, ydpi, ncomp, depth, mg, mc, dg, dc, xoff, yoff, lm, bm, rm, tm)\
        std_device_part1_(dtype, init, dname, stype, open_init_closed),\
        dci_values(ncomp, depth, mg, mc, dg, dc),\
        std_device_part2_(w, h, xdpi, ydpi),\
        offset_margin_values(xoff, yoff, lm, bm, rm, tm),\
        std_device_part3_()

#define std_device_full_body_type_extended(dtype, init, dname, stype, w, h, xdpi, ydpi, mcomp, ncomp, pol, depth, gi, mg, mc, dg, dc, ef, cn, xoff, yoff, lm, bm, rm, tm)\
        std_device_part1_(dtype, init, dname, stype, open_init_closed),\
        dci_extended_alpha_values(mcomp, ncomp, pol, depth, gi, mg, mc, dg, dc, 1, 1, ef, cn), \
        std_device_part2_(w, h, xdpi, ydpi),\
        offset_margin_values(xoff, yoff, lm, bm, rm, tm),\
        std_device_part3_()

#define std_device_full_body(dtype, init, dname, w, h, xdpi, ydpi, ncomp, depth, mg, mc, dg, dc, xoff, yoff, lm, bm, rm, tm)\
        std_device_full_body_type(dtype, init, dname, 0, w, h, xdpi, ydpi,\
            ncomp, depth, mg, mc, dg, dc, xoff, yoff, lm, bm, rm, tm)

#define std_device_dci_alpha_type_body(dtype, init, dname, stype, w, h, xdpi, ydpi, ncomp, depth, mg, mc, dg, dc, ta, ga)\
        std_device_part1_(dtype, init, dname, stype, open_init_closed),\
        dci_alpha_values(ncomp, depth, mg, mc, dg, dc, ta, ga),\
        std_device_part2_(w, h, xdpi, ydpi),\
        offset_margin_values(0, 0, 0, 0, 0, 0),\
        std_device_part3_()
#define std_device_dci_alpha_type_body_sc(dtype, init, dname, stype, w, h, xdpi, ydpi, ncomp, depth, mg, mc, dg, dc, ta, ga, ins, bp, ep)\
        std_device_part1_(dtype, init, dname, stype, open_init_closed),\
        dci_alpha_values(ncomp, depth, mg, mc, dg, dc, ta, ga),\
        std_device_part2_(w, h, xdpi, ydpi),\
        offset_margin_values(0, 0, 0, 0, 0, 0),\
        std_device_part3_sc(ins, bp, ep)

#define std_device_dci_type_body(dtype, init, dname, stype, w, h, xdpi, ydpi, ncomp, depth, mg, mc, dg, dc)\
        std_device_dci_alpha_type_body(dtype, init, dname, stype, w, h,\
          xdpi, ydpi, ncomp, depth, mg, mc, dg, dc, 1, 1)

#define std_device_dci_type_body_sc(dtype, init, dname, stype, w, h, xdpi, ydpi, ncomp, depth, mg, mc, dg, dc, ins, bp, ep)\
        std_device_dci_alpha_type_body_sc(dtype, init, dname, stype, w, h,\
          xdpi, ydpi, ncomp, depth, mg, mc, dg, dc, 1, 1, ins, bp, ep)

#define std_device_dci_body(dtype, init, dname, w, h, xdpi, ydpi, ncomp, depth, mg, mc, dg, dc)\
        std_device_dci_type_body(dtype, init, dname, 0,\
          w, h, xdpi, ydpi, ncomp, depth, mg, mc, dg, dc)

#define std_device_color_full_body(dtype, init, dname, w, h, xdpi, ydpi, depth, max_value, dither, xoff, yoff, lm, bm, rm, tm)\
        std_device_part1_(dtype, init, dname, 0, open_init_closed),\
        dci_color(depth, max_value, dither),\
        std_device_part2_(w, h, xdpi, ydpi),\
        offset_margin_values(xoff, yoff, lm, bm, rm, tm),\
        std_device_part3_()

#define std_device_color_body(dtype, init, dname, w, h, xdpi, ydpi, depth, max_value, dither)\
        std_device_color_full_body(dtype, init, dname,\
          w, h, xdpi, ydpi,\
          depth, max_value, dither,\
          0, 0, 0, 0, 0, 0)

#define std_device_color_stype_body(dtype, init, dname, stype, w, h, xdpi, ydpi, depth, max_value, dither)\
        std_device_part1_(dtype, init, dname, stype, open_init_closed),\
        dci_color(depth, max_value, dither),\
        std_device_part2_(w, h, xdpi, ydpi),\
        offset_margin_values(0, 0, 0, 0, 0, 0),\
        std_device_part3_()

#define std_device_std_color_full_body_type(dtype, init, dname, stype, w, h, xdpi, ydpi, depth, xoff, yoff, lm, bm, rm, tm)\
        std_device_part1_(dtype, init, dname, stype, open_init_closed),\
        dci_std_color(depth),\
        std_device_part2_(w, h, xdpi, ydpi),\
        offset_margin_values(xoff, yoff, lm, bm, rm, tm),\
        std_device_part3_()

#define std_device_std_color_full_body(dtype, init, dname, w, h, xdpi, ydpi, depth, xoff, yoff, lm, bm, rm, tm)\
        std_device_std_color_full_body_type(dtype, init, dname, 0,\
            w, h, xdpi, ydpi, depth, xoff, yoff, lm, bm, rm, tm)

/* ---------------- Default implementations ---------------- */

/* Default implementations of optional procedures. */
/* Note that the default map_xxx_color routines assume white_on_black. */
dev_proc_open_device(gx_default_open_device);
dev_proc_get_initial_matrix(gx_default_get_initial_matrix);
dev_proc_get_initial_matrix(gx_upright_get_initial_matrix);
dev_proc_sync_output(gx_default_sync_output);
dev_proc_output_page(gx_default_output_page);
dev_proc_close_device(gx_default_close_device);
dev_proc_map_rgb_color(gx_default_w_b_map_rgb_color);
dev_proc_map_color_rgb(gx_default_w_b_map_color_rgb);
dev_proc_encode_color(gx_default_w_b_mono_encode_color);
dev_proc_decode_color(gx_default_w_b_mono_decode_color);
#define gx_default_map_rgb_color gx_default_w_b_map_rgb_color
#define gx_default_map_color_rgb gx_default_w_b_map_color_rgb
dev_proc_copy_mono(gx_default_copy_mono);
dev_proc_copy_color(gx_default_copy_color);
dev_proc_get_params(gx_default_get_params);
dev_proc_put_params(gx_default_put_params);
dev_proc_map_cmyk_color(gx_default_map_cmyk_color);
dev_proc_get_page_device(gx_default_get_page_device);   /* returns NULL */
dev_proc_get_page_device(gx_page_device_get_page_device);       /* returns dev */
dev_proc_get_alpha_bits(gx_default_get_alpha_bits);
dev_proc_copy_alpha(gx_no_copy_alpha);  /* gives error */
dev_proc_copy_alpha(gx_default_copy_alpha);
dev_proc_fill_path(gx_default_fill_path);
dev_proc_fill_path(gx_default_fill_path_shading_or_pattern);
dev_proc_stroke_path(gx_default_stroke_path);
dev_proc_stroke_path(gx_default_stroke_path_shading_or_pattern);
dev_proc_fill_mask(gx_default_fill_mask);
dev_proc_fill_trapezoid(gx_default_fill_trapezoid);
dev_proc_fill_parallelogram(gx_default_fill_parallelogram);
dev_proc_fill_triangle(gx_default_fill_triangle);
dev_proc_draw_thin_line(gx_default_draw_thin_line);
dev_proc_strip_tile_rectangle(gx_default_strip_tile_rectangle);
dev_proc_strip_copy_rop2(gx_no_strip_copy_rop2);
dev_proc_get_clipping_box(gx_default_get_clipping_box);
dev_proc_get_clipping_box(gx_get_largest_clipping_box);
dev_proc_begin_typed_image(gx_default_begin_typed_image);
dev_proc_get_bits_rectangle(gx_default_get_bits_rectangle); /* just returns error */
dev_proc_get_bits_rectangle(gx_blank_get_bits_rectangle);
dev_proc_composite(gx_no_composite);
/* default is for ordinary "leaf" devices, null is for */
/* devices that only care about coverage and not contents. */
dev_proc_composite(gx_default_composite);
dev_proc_composite(gx_null_composite);
dev_proc_get_hardware_params(gx_default_get_hardware_params);
dev_proc_text_begin(gx_default_text_begin);
dev_proc_dev_spec_op(gx_default_dev_spec_op);
dev_proc_fill_rectangle_hl_color(gx_default_fill_rectangle_hl_color);
dev_proc_include_color_space(gx_default_include_color_space);
dev_proc_fill_linear_color_scanline(gx_default_fill_linear_color_scanline);
dev_proc_fill_linear_color_scanline(gx_hl_fill_linear_color_scanline);
dev_proc_fill_linear_color_trapezoid(gx_default_fill_linear_color_trapezoid);
dev_proc_fill_linear_color_triangle(gx_default_fill_linear_color_triangle);
dev_proc_update_spot_equivalent_colors(gx_default_update_spot_equivalent_colors);
dev_proc_ret_devn_params(gx_default_ret_devn_params);
dev_proc_fillpage(gx_default_fillpage);
dev_proc_get_profile(gx_default_get_profile);
dev_proc_set_graphics_type_tag(gx_default_set_graphics_type_tag);
dev_proc_strip_copy_rop2(gx_default_strip_copy_rop2);
dev_proc_strip_tile_rect_devn(gx_default_strip_tile_rect_devn);
dev_proc_copy_alpha_hl_color(gx_default_copy_alpha_hl_color);
dev_proc_process_page(gx_default_process_page);
dev_proc_transform_pixel_region(gx_default_transform_pixel_region);
dev_proc_fill_stroke_path(gx_default_fill_stroke_path);
dev_proc_lock_pattern(gx_default_lock_pattern);
dev_proc_begin_transparency_group(gx_default_begin_transparency_group);
dev_proc_end_transparency_group(gx_default_end_transparency_group);
dev_proc_begin_transparency_mask(gx_default_begin_transparency_mask);
dev_proc_end_transparency_mask(gx_default_end_transparency_mask);
dev_proc_discard_transparency_layer(gx_default_discard_transparency_layer);
dev_proc_push_transparency_state(gx_default_push_transparency_state);
dev_proc_pop_transparency_state(gx_default_pop_transparency_state);
dev_proc_put_image(gx_default_put_image);
dev_proc_copy_alpha_hl_color(gx_default_no_copy_alpha_hl_color);
dev_proc_copy_planes(gx_default_copy_planes);

int gx_default_initialize_device(gx_device *dev);

/* BACKWARD COMPATIBILITY */
#define gx_non_imaging_composite gx_null_composite

/* Color mapping routines for black-on-white, gray scale, true RGB, */
/* true CMYK, and 1-bit CMYK color. */
dev_proc_map_rgb_color(gx_default_b_w_map_rgb_color);
dev_proc_map_color_rgb(gx_default_b_w_map_color_rgb);
dev_proc_encode_color(gx_default_b_w_mono_encode_color);
dev_proc_decode_color(gx_default_b_w_mono_decode_color);
dev_proc_map_rgb_color(gx_default_gray_map_rgb_color);
dev_proc_map_color_rgb(gx_default_gray_map_color_rgb);
dev_proc_map_color_rgb(gx_default_rgb_map_color_rgb);
dev_proc_encode_color(gx_default_gray_encode_color);
dev_proc_decode_color(gx_default_gray_decode_color);
#define gx_default_cmyk_map_cmyk_color cmyk_8bit_map_cmyk_color /*see below*/
/*
 * The following are defined as "standard" color mapping procedures
 * that can be propagated through device pipelines and that color
 * processing code can test for.
 */
dev_proc_map_rgb_color(gx_default_rgb_map_rgb_color);
dev_proc_map_cmyk_color(cmyk_1bit_map_cmyk_color);
dev_proc_map_color_rgb(cmyk_1bit_map_color_rgb);
dev_proc_decode_color(cmyk_1bit_map_color_cmyk);
dev_proc_map_cmyk_color(cmyk_8bit_map_cmyk_color);
dev_proc_map_color_rgb(cmyk_8bit_map_color_rgb);
dev_proc_decode_color(cmyk_8bit_map_color_cmyk);
dev_proc_map_cmyk_color(cmyk_16bit_map_cmyk_color);
dev_proc_map_color_rgb(cmyk_16bit_map_color_rgb);
dev_proc_decode_color(cmyk_16bit_map_color_cmyk);
dev_proc_encode_color(gx_default_8bit_map_gray_color);
dev_proc_decode_color(gx_default_8bit_map_color_gray);

/* Default implementations for forwarding devices */
void gx_forward_initialize_procs(gx_device *dev);
dev_proc_close_device(gx_forward_close_device);
dev_proc_get_initial_matrix(gx_forward_get_initial_matrix);
dev_proc_sync_output(gx_forward_sync_output);
dev_proc_output_page(gx_forward_output_page);
dev_proc_map_rgb_color(gx_forward_map_rgb_color);
dev_proc_map_color_rgb(gx_forward_map_color_rgb);
dev_proc_fill_rectangle(gx_forward_fill_rectangle);
dev_proc_copy_mono(gx_forward_copy_mono);
dev_proc_copy_color(gx_forward_copy_color);
dev_proc_get_params(gx_forward_get_params);
dev_proc_put_params(gx_forward_put_params);
dev_proc_map_cmyk_color(gx_forward_map_cmyk_color);
dev_proc_get_page_device(gx_forward_get_page_device);
#define gx_forward_get_alpha_bits gx_default_get_alpha_bits
dev_proc_copy_alpha(gx_forward_copy_alpha);
dev_proc_fill_path(gx_forward_fill_path);
dev_proc_stroke_path(gx_forward_stroke_path);
dev_proc_fill_mask(gx_forward_fill_mask);
dev_proc_fill_trapezoid(gx_forward_fill_trapezoid);
dev_proc_fill_parallelogram(gx_forward_fill_parallelogram);
dev_proc_fill_triangle(gx_forward_fill_triangle);
dev_proc_draw_thin_line(gx_forward_draw_thin_line);
dev_proc_strip_tile_rectangle(gx_forward_strip_tile_rectangle);
dev_proc_get_clipping_box(gx_forward_get_clipping_box);
dev_proc_begin_typed_image(gx_forward_begin_typed_image);
dev_proc_get_bits_rectangle(gx_forward_get_bits_rectangle);
/* There is no forward_composite (see Drivers.htm). */
dev_proc_get_hardware_params(gx_forward_get_hardware_params);
dev_proc_text_begin(gx_forward_text_begin);
dev_proc_get_color_mapping_procs(gx_forward_get_color_mapping_procs);
dev_proc_get_color_comp_index(gx_forward_get_color_comp_index);
dev_proc_encode_color(gx_forward_encode_color);
dev_proc_decode_color(gx_forward_decode_color);
dev_proc_dev_spec_op(gx_forward_dev_spec_op);
dev_proc_fill_rectangle_hl_color(gx_forward_fill_rectangle_hl_color);
dev_proc_include_color_space(gx_forward_include_color_space);
dev_proc_fill_linear_color_scanline(gx_forward_fill_linear_color_scanline);
dev_proc_fill_linear_color_trapezoid(gx_forward_fill_linear_color_trapezoid);
dev_proc_fill_linear_color_triangle(gx_forward_fill_linear_color_triangle);
dev_proc_update_spot_equivalent_colors(gx_forward_update_spot_equivalent_colors);
dev_proc_ret_devn_params(gx_forward_ret_devn_params);
dev_proc_fillpage(gx_forward_fillpage);
dev_proc_put_image(gx_forward_put_image);
dev_proc_copy_planes(gx_forward_copy_planes);
dev_proc_composite(gx_forward_composite);
dev_proc_get_profile(gx_forward_get_profile);
dev_proc_set_graphics_type_tag(gx_forward_set_graphics_type_tag);
dev_proc_strip_copy_rop2(gx_forward_strip_copy_rop2);
dev_proc_strip_tile_rect_devn(gx_forward_strip_tile_rect_devn);
dev_proc_copy_alpha_hl_color(gx_forward_copy_alpha_hl_color);
dev_proc_transform_pixel_region(gx_forward_transform_pixel_region);
dev_proc_fill_stroke_path(gx_forward_fill_stroke_path);
dev_proc_lock_pattern(gx_forward_lock_pattern);
void gx_forward_device_initialize_procs(gx_device *dev);

/* ---------------- Implementation utilities ---------------- */
int gx_default_get_param(gx_device *dev, char *Param, void *list);

/* Fill in defaulted procedures in a device procedure record. */
void gx_device_fill_in_procs(gx_device *);
void gx_device_forward_fill_in_procs(gx_device_forward *);

/* Forward the color mapping procedures from a device to its target. */
void gx_device_forward_color_procs(gx_device_forward *);

/*
 * Check if the device's encode_color routine uses 'separable' bit encodings
 * for each colorant.  For more info see the routine's header.
 */
void check_device_separable(gx_device * dev);
/*
 * Is this a contone device?
 */
bool device_is_contone(gx_device* pdev);
/*
 * Check if the device's encode_color routine uses a pdf14 compatible
 * encoding.  For more info see the routine's header.
 */
void check_device_compatible_encoding(gx_device * dev);
/*
 * If a device has a linear and separable encode color function then
 * set up the comp_bits, comp_mask, and comp_shift fields.
 */
void set_linear_color_bits_mask_shift(gx_device * dev);
/*
 * Copy the color mapping procedures from the target if they are
 * standard ones (saving a level of procedure call at mapping time).
 */
void gx_device_copy_color_procs(gx_device *dev, const gx_device *target);

/* Get the black and white pixel values of a device. */
gx_color_index gx_device_black(gx_device *dev);
#define gx_device_black_inline(dev)\
  ((dev)->cached_colors.black == gx_no_color_index ?\
   gx_device_black(dev) : (dev)->cached_colors.black)
gx_color_index gx_device_white(gx_device *dev);
#define gx_device_white_inline(dev)\
  ((dev)->cached_colors.white == gx_no_color_index ?\
   gx_device_white(dev) : (dev)->cached_colors.white)

/* Clear the black/white pixel cache. */
void gx_device_decache_colors(gx_device *dev);

/*
 * Copy the color-related device parameters back from the target:
 * color_info and color mapping procedures.
 */
void gx_device_copy_color_params(gx_device *dev, const gx_device *target);

/*
 * Copy device parameters back from a target.  This copies all standard
 * parameters related to page size and resolution, plus color_info
 * and (if appropriate) color mapping procedures.
 */
void gx_device_copy_params(gx_device *dev, const gx_device *target);

/*
 * Parse the output file name for a device, recognizing "-" and "|command",
 * and also detecting and validating any %nnd format for inserting the
 * page count.  If a format is present, store a pointer to its last
 * character in *pfmt, otherwise store 0 there.  Note that an empty name
 * is currently allowed.
 */
int gx_parse_output_file_name(gs_parsed_file_name_t *pfn,
                              const char **pfmt, const char *fname,
                              uint len, gs_memory_t *memory);

/*
 * Returns true if the outputfile requests separate pages (contains %d)
 */
bool gx_outputfile_is_separate_pages(const char *fname, gs_memory_t *memory);

/*
 * Open the output file for a device.  Note that if the file name is empty,
 * it may be replaced with the name of a scratch file.
 */
int gx_device_open_output_file(const gx_device * dev, char *fname,
                               bool binary, bool positionable,
                               gp_file ** pfile);

/* Close the output file for a device. */
int gx_device_close_output_file(const gx_device * dev, const char *fname,
                                gp_file *file);

/* Delete the current output file for a device (file must be closed first) */
int gx_device_delete_output_file(const gx_device * dev, const char *fname);

/*
 * Define the number of levels for a colorant above which we do not halftone.
 */
#define MIN_CONTONE_LEVELS 31

/*
 * Determine whether a given device needs to halftone.  Eventually this
 * should take a gs_gstate as an additional argument.
 */
#define gx_device_must_halftone(dev)\
  ((gx_device_has_color(dev) ? (dev)->color_info.max_color :\
    (dev)->color_info.max_gray) < MIN_CONTONE_LEVELS)

/*
 * Do generic work for output_page.  All output_page procedures must call
 * this as the last thing they do, unless an error has occurred earlier.
 */
dev_proc_output_page(gx_finish_output_page);

/*
 * Device procedures that draw into rectangles need to clip the coordinates
 * to the rectangle ((0,0),(dev->width,dev->height)).  The following macros
 * do the clipping.  They assume that the arguments of the procedure are
 * named dev, x, y, w, and h, and may modify the arguments (other than dev).
 *
 * For procedures that fill a region, dev, x, y, w, and h are the only
 * relevant arguments.  For procedures that copy bitmaps, see below.
 *
 * The following group of macros for region-filling procedures clips
 * specific edges of the supplied rectangle, as indicated by the macro name.
 */
#define fit_fill_xy(dev, x, y, w, h)\
  BEGIN\
        if ( (x | y) < 0 ) {\
          if ( x < 0 )\
            w += x, x = 0;\
          if ( y < 0 )\
            h += y, y = 0;\
        }\
  END
#define fit_fill_y(dev, y, h)\
  BEGIN\
        if ( y < 0 )\
          h += y, y = 0;\
  END
#define fit_fill_w(dev, x, w)\
  BEGIN\
        if ( w > (dev)->width - x )\
          w = (dev)->width - x;\
  END
#define fit_fill_h(dev, y, h)\
  BEGIN\
        if ( h > (dev)->height - y )\
          h = (dev)->height - y;\
  END
#define fit_fill_xywh(dev, x, y, w, h)\
  BEGIN\
        fit_fill_xy(dev, x, y, w, h);\
        fit_fill_w(dev, x, w);\
        fit_fill_h(dev, y, h);\
  END
/*
 * Clip all edges, and return from the procedure if the result is empty.
 */
#define fit_fill(dev, x, y, w, h)\
  BEGIN\
        fit_fill_xywh(dev, x, y, w, h);\
        if ( w <= 0 || h <= 0 )\
          return 0;\
  END

/*
 * For driver procedures that copy bitmaps (e.g., copy_mono, copy_color),
 * clipping the destination region also may require adjusting the pointer to
 * the source data.  In addition to dev, x, y, w, and h, the clipping macros
 * for these procedures reference data, data_x, raster, and id; they may
 * modify the values of data, data_x, and id.
 *
 * Clip the edges indicated by the macro name.
 */
#define fit_copy_xyw(dev, data, data_x, raster, id, x, y, w, h)\
  BEGIN\
        if ( (x | y) < 0 ) {\
          if ( x < 0 )\
            w += x, data_x -= x, x = 0;\
          if ( y < 0 )\
            h += y, data -= (int)(y * raster), id = gx_no_bitmap_id, y = 0; \
        }\
        if ( w > (dev)->width - x )\
          w = (dev)->width - x;\
  END
/*
 * Clip all edges, and return from the procedure if the result is empty.
 */
#define fit_copy(dev, data, data_x, raster, id, x, y, w, h)\
  BEGIN\
        fit_copy_xyw(dev, data, data_x, raster, id, x, y, w, h);\
        if ( h > (dev)->height - y )\
          h = (dev)->height - y;\
        if ( w <= 0 || h <= 0 )\
          return 0;\
  END

/* ---------------- Media parameters ---------------- */

/* Define the InputAttributes and OutputAttributes of a device. */
/* The device get_params procedure would call these. */

typedef struct gdev_input_media_s {
    float PageSize[4];          /* nota bene */
    const char *MediaColor;
    float MediaWeight;
    const char *MediaType;
} gdev_input_media_t;

#define gdev_input_media_default_values { 0, 0, 0, 0 }, 0, 0, 0
extern const gdev_input_media_t gdev_input_media_default;

void gdev_input_media_init(gdev_input_media_t * pim);

int gdev_begin_input_media(gs_param_list * mlist, gs_param_dict * pdict,
                           int count);

int gdev_write_input_page_size(int index, gs_param_dict * pdict,
                               double width_points, double height_points);

int gdev_write_input_media(int index, gs_param_dict * pdict,
                           const gdev_input_media_t * pim);

int gdev_end_input_media(gs_param_list * mlist, gs_param_dict * pdict);

typedef struct gdev_output_media_s {
    const char *OutputType;
} gdev_output_media_t;

#define gdev_output_media_default_values 0
extern const gdev_output_media_t gdev_output_media_default;

int gdev_begin_output_media(gs_param_list * mlist, gs_param_dict * pdict,
                            int count);

int gdev_write_output_media(int index, gs_param_dict * pdict,
                            const gdev_output_media_t * pom);

int gdev_end_output_media(gs_param_list * mlist, gs_param_dict * pdict);

void gx_device_request_leadingedge(gx_device *dev, int le_req);

/* ---------------- Device subclassing procedures ---------------- */
int gs_is_pdf14trans_compositor(const gs_composite_t * pct);

#define subclass_common\
    t_dev_proc_composite *saved_compositor_method;\
    gx_device_forward *forwarding_dev;\
    gx_device *pre_composite_device;\
    void (*saved_finalize_method)(gx_device *)

typedef int (t_dev_proc_composite) (gx_device *dev, gx_device **pcdev, const gs_composite_t *pcte, gs_gstate *pgs, gs_memory_t *memory, gx_device *cdev);

typedef struct {
    t_dev_proc_composite *saved_compositor_method;
    gx_device_forward *forwarding_dev;
    gx_device *pre_composite_device;
    void (*saved_finalize_method)(gx_device *);
} generic_subclass_data;

int gx_copy_device_procs(gx_device *dest, const gx_device *src, const gx_device *prototype);
int gx_device_subclass(gx_device *dev_to_subclass, gx_device *new_prototype, unsigned int private_data_size);
void gx_device_unsubclass(gx_device *dev);
int gx_update_from_subclass(gx_device *dev);
int gx_subclass_composite(gx_device *dev, gx_device **pcdev, const gs_composite_t *pcte,
    gs_gstate *pgs, gs_memory_t *memory, gx_device *cdev);
void gx_subclass_fill_in_page_procs(gx_device *dev);

int gx_init_non_threadsafe_device(gx_device *dev);


#endif /* gxdevice_INCLUDED */