/* Copyright (C) 1995, 1997, 1998 Aladdin Enterprises.  All rights reserved.
  
  This file is part of GNU Ghostscript.
  
  GNU 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 GNU General Public License for full details.
  
  Everyone is granted permission to copy, modify and redistribute GNU
  Ghostscript, but only under the conditions described in the GNU General
  Public License.  A copy of this license is supposed to have been given
  to you along with GNU 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.
  
  Aladdin Enterprises supports the work of the GNU Project, but is not
  affiliated with the Free Software Foundation or the GNU Project.  GNU
  Ghostscript, as distributed by Aladdin Enterprises, does not require any
  GNU software to build or run it.
*/

/*$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 = (byte *) gs_malloc(raster, 1, "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(line, raster, 1, "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 = (byte *) gs_malloc(raster, 1, "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(line, raster, 1, "tiff24_print_page");
    }

    return code;
}

#undef tfdev
