cmd_bmp.c

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/*
 * (C) Copyright 2002
 * Detlev Zundel, DENX Software Engineering, [e-mail].
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/*
 * BMP handling routines
 */

#include <common.h>
#include <bmp_layout.h>
#include <command.h>

#if (CONFIG_COMMANDS & CFG_CMD_BMP)

static int bmp_info (ulong addr);
extern int bmp_display (ulong addr, int x, int y);

/*
 * Subroutine:  do_bmp
 *
 * Description: Handler for 'bmp' command..
 *
 * Inputs:	argv[1] contains the subcommand
 *
 * Return:      None
 *
 */
int do_bmp(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	ulong addr;

	switch (argc) {
	case 2:		/* use load_addr as default address */
		addr = load_addr;
		break;
	case 3:		/* use argument */
		addr = simple_strtoul(argv[2], NULL, 16);
		break;
	case 5:		/* use argument */
		addr = simple_strtoul(argv[2], NULL, 16);
		break;
	default:
		printf ("Usage:\n%s\n", cmdtp->usage);
		return 1;
	}

	/* Allow for short names
	 * Adjust length if more sub-commands get added
	 */
	if (strncmp(argv[1],"info",1) == 0) {
		return (bmp_info(addr));
	} else if (strncmp(argv[1],"display",1) == 0) {
		return (display_bmp(addr, simple_strtoul(argv[3], NULL, 10), simple_strtoul(argv[4], NULL, 10)));
	} else {
		printf ("Usage:\n%s\n", cmdtp->usage);
		return 1;
	}
}

U_BOOT_CMD(
	bmp,	5,	1,	do_bmp,
	"bmp     - manipulate BMP image data\n",
	"info <imageAddr>    - display image info\n"
	"bmp display <imageAddr> - display image\n"
);

/*
 * Subroutine:  bmp_info
 *
 * Description: Show information about bmp file in memory
 *
 * Inputs:	addr		address of the bmp file
 *
 * Return:      None
 *
 */
static int bmp_info(ulong addr)
{
	bmp_image_t *bmp=(bmp_image_t *)addr;
	if (!((bmp->header.signature[0]=='B') &&
	      (bmp->header.signature[1]=='M'))) {
		printf("There is no valid bmp file at the given address\n");
		return(1);
	}
	printf("Image size    : %d x %d\n", (bmp->header.width), (bmp->header.height));
	printf("Bits per pixel: %d\n", (bmp->header.bit_count));
	printf("Compression   : %d\n", (bmp->header.compression));
	return(0);
}

#endif /* (CONFIG_COMMANDS & CFG_CMD_BMP) */