/* Copyright (C) 1995, 1997, 1998 Aladdin Enterprises.  All rights reserved.

   This file is part of Aladdin Ghostscript.

   Aladdin 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 Ghostscript Free Public
   License (the "License") for full details.

   Every copy of Aladdin 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 Aladdin 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: gdevtfnx.c $ */
/* 12-bit & 24-bit RGB uncompressed TIFF driver */
#include "gdevprn.h"
#include "gdevtifs.h"

/*
 * Thanks to Alan Barclay <alan@escribe.co.uk> for donating the original
 * version of this code to Ghostscript.
 */

/* ------ The device descriptors ------ */

/* Default X and Y resolution */
#define X_DPI 72
#define Y_DPI 72

typedef struct gx_device_tiff_s {
    gx_device_common;
    gx_prn_device_common;
    gdev_tiff_state tiff;
} gx_device_tiff;

private dev_proc_print_page(tiff12_print_page);
private dev_proc_print_page(tiff24_print_page);

private const gx_device_procs tiff12_procs =
prn_color_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close,
		gx_default_rgb_map_rgb_color, gx_default_rgb_map_color_rgb);
private const gx_device_procs tiff24_procs =
prn_color_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close,
		gx_default_rgb_map_rgb_color, gx_default_rgb_map_color_rgb);

const gx_device_printer gs_tiff12nc_device =
{prn_device_std_body(gx_device_tiff, tiff12_procs, "tiff12nc",
		     DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS,
		     X_DPI, Y_DPI,
		     0, 0, 0, 0,
		     24, tiff12_print_page)
};

const gx_device_printer gs_tiff24nc_device =
{prn_device_std_body(gx_device_tiff, tiff24_procs, "tiff24nc",
		     DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS,
		     X_DPI, Y_DPI,
		     0, 0, 0, 0,
		     24, tiff24_print_page)
};

/* ------ Private definitions ------ */

/* Define our TIFF directory - sorted by tag number */
typedef struct tiff_rgb_directory_s {
    TIFF_dir_entry BitsPerSample;
    TIFF_dir_entry Compression;
    TIFF_dir_entry Photometric;
    TIFF_dir_entry FillOrder;
    TIFF_dir_entry SamplesPerPixel;
} tiff_rgb_directory;
typedef struct tiff_rgb_values_s {
    TIFF_ushort bps[3];
} tiff_rgb_values;

private const tiff_rgb_directory dir_rgb_template =
{
	/* C's ridiculous rules about & and arrays require bps[0] here: */
    {TIFFTAG_BitsPerSample, TIFF_SHORT | TIFF_INDIRECT, 3, offset_of(tiff_rgb_values, bps[0])},
    {TIFFTAG_Compression, TIFF_SHORT, 1, Compression_none},
    {TIFFTAG_Photometric, TIFF_SHORT, 1, Photometric_RGB},
    {TIFFTAG_FillOrder, TIFF_SHORT, 1, FillOrder_MSB2LSB},
    {TIFFTAG_SamplesPerPixel, TIFF_SHORT, 1, 3},
};

private const tiff_rgb_values val_12_template =
{
    {4, 4, 4}
};

private const tiff_rgb_values val_24_template =
{
    {8, 8, 8}
};

/* ------ Private functions ------ */

#define tfdev ((gx_device_tiff *)pdev)

private int
tiff12_print_page(gx_device_printer * pdev, FILE * file)
{
    int code;

    /* Write the page directory. */
    code = gdev_tiff_begin_page(pdev, &tfdev->tiff, file,
				(const TIFF_dir_entry *)&dir_rgb_template,
			  sizeof(dir_rgb_template) / sizeof(TIFF_dir_entry),
				(const byte *)&val_12_template,
				sizeof(val_12_template));
    if (code < 0)
	return code;

    /* Write the page data. */
    {
	int y;
	int raster = gdev_prn_raster(pdev);
	byte *line = gs_alloc_bytes(pdev->memory, raster, "tiff12_print_page");
	byte *row;

	if (line == 0)
	    return_error(gs_error_VMerror);

	for (y = 0; y < pdev->height; ++y) {
	    const byte *src;
	    byte *dest;
	    int x;

	    code = gdev_prn_get_bits(pdev, y, line, &row);
	    if (code < 0)
		break;

	    for (src = row, dest = line, x = 0; x < raster;
		 src += 6, dest += 3, x += 6
		) {
		dest[0] = (src[0] & 0xf0) | (src[1] >> 4);
		dest[1] = (src[2] & 0xf0) | (src[3] >> 4);
		dest[2] = (src[4] & 0xf0) | (src[5] >> 4);
	    }
	    fwrite(line, 1, dest - line, file);
	}

	gdev_tiff_end_page(&tfdev->tiff, file);
	gs_free_object(pdev->memory, line, "tiff12_print_page");
    }

    return code;
}

private int
tiff24_print_page(gx_device_printer * pdev, FILE * file)
{
    int code;

    /* Write the page directory. */
    code = gdev_tiff_begin_page(pdev, &tfdev->tiff, file,
				(const TIFF_dir_entry *)&dir_rgb_template,
			  sizeof(dir_rgb_template) / sizeof(TIFF_dir_entry),
				(const byte *)&val_24_template,
				sizeof(val_24_template));
    if (code < 0)
	return code;

    /* Write the page data. */
    {
	int y;
	int raster = gdev_prn_raster(pdev);
	byte *line = gs_alloc_bytes(pdev->memory, raster, "tiff24_print_page");
	byte *row;

	if (line == 0)
	    return_error(gs_error_VMerror);
	for (y = 0; y < pdev->height; ++y) {
	    code = gdev_prn_get_bits(pdev, y, line, &row);
	    if (code < 0)
		break;
	    fwrite((char *)row, raster, 1, file);
	}
	gdev_tiff_end_page(&tfdev->tiff, file);
	gs_free_object(pdev->memory, line, "tiff24_print_page");
    }

    return code;
}

#undef tfdev
