/* Copyright (C) 1992, 1993, 1997, 1998, 1999, 2000 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.
*/

/*$RCSfile: gdevbmp.c,v $ $Revision: 1.3.2.1 $ */
/* .BMP file format output drivers */
#include "gdevprn.h"
#include "gdevpccm.h"
#include "gdevbmp.h"

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

private dev_proc_print_page(bmp_print_page);
private dev_proc_print_page(bmp_cmyk_print_page);

/* Monochrome. */

const gx_device_printer gs_bmpmono_device =
prn_device(prn_std_procs, "bmpmono",
	   DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS,
	   X_DPI, Y_DPI,
	   0, 0, 0, 0,		/* margins */
	   1, bmp_print_page);

/* 8-bit (SuperVGA-style) grayscale . */
/* (Uses a fixed palette of 256 gray levels.) */

private const gx_device_procs bmpgray_procs =
prn_color_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close,
		gx_default_gray_map_rgb_color, gx_default_gray_map_color_rgb);
const gx_device_printer gs_bmpgray_device =
prn_device(bmpgray_procs, "bmpgray",
	   DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS,
	   X_DPI, Y_DPI,
	   0, 0, 0, 0,		/* margins */
	   8, bmp_print_page);

/* 1-bit-per-plane separated CMYK color. */

#define bmp_cmyk_procs(p_map_color_rgb, p_map_cmyk_color)\
    gdev_prn_open, NULL, NULL, gdev_prn_output_page, gdev_prn_close,\
    NULL, p_map_color_rgb, NULL, NULL, NULL, NULL, NULL, NULL,\
    gdev_prn_get_params, gdev_prn_put_params,\
    p_map_cmyk_color, NULL, NULL, NULL, gx_page_device_get_page_device

private const gx_device_procs bmpsep1_procs = {
    bmp_cmyk_procs(cmyk_1bit_map_color_rgb, cmyk_1bit_map_cmyk_color)
};
const gx_device_printer gs_bmpsep1_device = {
  prn_device_body(gx_device_printer, bmpsep1_procs, "bmpsep1",
	DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS,
	X_DPI, Y_DPI,
	0,0,0,0,			/* margins */
	4, 4, 1, 1, 2, 2, bmp_cmyk_print_page)
};

/* 8-bit-per-plane separated CMYK color. */

private const gx_device_procs bmpsep8_procs = {
    bmp_cmyk_procs(cmyk_8bit_map_color_rgb, cmyk_8bit_map_cmyk_color)
};
const gx_device_printer gs_bmpsep8_device = {
  prn_device_body(gx_device_printer, bmpsep8_procs, "bmpsep8",
	DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS,
	X_DPI, Y_DPI,
	0,0,0,0,			/* margins */
	4, 32, 255, 255, 256, 256, bmp_cmyk_print_page)
};

/* 4-bit planar (EGA/VGA-style) color. */

private const gx_device_procs bmp16_procs =
prn_color_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close,
		pc_4bit_map_rgb_color, pc_4bit_map_color_rgb);
const gx_device_printer gs_bmp16_device =
prn_device(bmp16_procs, "bmp16",
	   DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS,
	   X_DPI, Y_DPI,
	   0, 0, 0, 0,		/* margins */
	   4, bmp_print_page);

/* 8-bit (SuperVGA-style) color. */
/* (Uses a fixed palette of 3,3,2 bits.) */

private const gx_device_procs bmp256_procs =
prn_color_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close,
		pc_8bit_map_rgb_color, pc_8bit_map_color_rgb);
const gx_device_printer gs_bmp256_device =
prn_device(bmp256_procs, "bmp256",
	   DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS,
	   X_DPI, Y_DPI,
	   0, 0, 0, 0,		/* margins */
	   8, bmp_print_page);

/* 24-bit color. */

private const gx_device_procs bmp16m_procs =
prn_color_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close,
		bmp_map_16m_rgb_color, bmp_map_16m_color_rgb);
const gx_device_printer gs_bmp16m_device =
prn_device(bmp16m_procs, "bmp16m",
	   DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS,
	   X_DPI, Y_DPI,
	   0, 0, 0, 0,		/* margins */
	   24, bmp_print_page);

/* 32-bit CMYK color (outside the BMP specification). */

private const gx_device_procs bmp32b_procs = {
    bmp_cmyk_procs(cmyk_8bit_map_color_rgb, gx_default_cmyk_map_cmyk_color)
};
const gx_device_printer gs_bmp32b_device =
prn_device(bmp32b_procs, "bmp32b",
	   DEFAULT_WIDTH_10THS, DEFAULT_HEIGHT_10THS,
	   X_DPI, Y_DPI,
	   0, 0, 0, 0,		/* margins */
	   32, bmp_print_page);

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

/* Write out a page in BMP format. */
/* This routine is used for all non-separated formats. */
private int
bmp_print_page(gx_device_printer * pdev, FILE * file)
{
    uint raster = gdev_prn_raster(pdev);
    /* BMP scan lines are padded to 32 bits. */
    uint bmp_raster = raster + (-raster & 3);
    byte *row = gs_alloc_bytes(pdev->memory, bmp_raster, "bmp file buffer");
    int y;
    int code;		/* return code */

    if (row == 0)		/* can't allocate row buffer */
	return_error(gs_error_VMerror);

    /* Write the file header. */

    code = write_bmp_header(pdev, file);
    if (code < 0)
	goto done;

    /* Write the contents of the image. */
    /* BMP files want the image in bottom-to-top order! */

    for (y = pdev->height - 1; y >= 0; y--) {
	gdev_prn_copy_scan_lines(pdev, y, row, raster);
	fwrite((const char *)row, bmp_raster, 1, file);
    }

done:
    gs_free_object(pdev->memory, row, "bmp file buffer");

    return code;
}

/* Write out a page in separated CMYK format. */
/* This routine is used for all formats. */
private int
bmp_cmyk_print_page(gx_device_printer * pdev, FILE * file)
{
    int plane_depth = pdev->color_info.depth / 4;
    uint raster = bitmap_raster(pdev->width * plane_depth);
    /* BMP scan lines are padded to 32 bits. */
    uint bmp_raster = raster + (-raster & 3);
    byte *row = gs_alloc_bytes(pdev->memory, bmp_raster, "bmp file buffer");
    int y;
    int code = 0;		/* return code */
    int plane;

    if (row == 0)		/* can't allocate row buffer */
	return_error(gs_error_VMerror);

    for (plane = 0; plane <= 3; ++plane) {
	gx_render_plane_t render_plane;

	/* Write the page header. */

	code = write_bmp_separated_header(pdev, file);
	if (code < 0)
	    break;

	/* Write the contents of the image. */
	/* BMP files want the image in bottom-to-top order! */

	gx_render_plane_init(&render_plane, (gx_device *)pdev, plane);
	for (y = pdev->height - 1; y >= 0; y--) {
	    byte *actual_data;
	    uint actual_raster;

	    code = gdev_prn_get_lines(pdev, y, 1, row, bmp_raster,
				      &actual_data, &actual_raster,
				      &render_plane);
	    if (code < 0)
		goto done;
	    fwrite((const char *)actual_data, bmp_raster, 1, file);
	}
    }

done:
    gs_free_object(pdev->memory, row, "bmp file buffer");

    return code;
}
