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/*
* (C) Copyright 2002
* Detlev Zundel, DENX Software Engineering, dzu@denx.de.
*
* 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>
#include <asm/byteorder.h>
#include <malloc.h>
static int bmp_info (ulong addr);
static int bmp_display (ulong addr, int x, int y);
int gunzip(void *, int, unsigned char *, unsigned long *);
/*
* Allocate and decompress a BMP image using gunzip().
*
* Returns a pointer to the decompressed image data. Must be freed by
* the caller after use.
*
* Returns NULL if decompression failed, or if the decompressed data
* didn't contain a valid BMP signature.
*/
#ifdef CONFIG_VIDEO_BMP_GZIP
static bmp_image_t *gunzip_bmp(unsigned long addr, unsigned long *lenp)
{
void *dst;
unsigned long len;
bmp_image_t *bmp;
/*
* Decompress bmp image
*/
len = CFG_VIDEO_LOGO_MAX_SIZE;
dst = malloc(CFG_VIDEO_LOGO_MAX_SIZE);
if (dst == NULL) {
puts("Error: malloc in gunzip failed!\n");
return NULL;
}
if (gunzip(dst, CFG_VIDEO_LOGO_MAX_SIZE, (uchar *)addr, &len) != 0) {
free(dst);
return NULL;
}
if (len == CFG_VIDEO_LOGO_MAX_SIZE)
puts("Image could be truncated"
" (increase CFG_VIDEO_LOGO_MAX_SIZE)!\n");
bmp = dst;
/*
* Check for bmp mark 'BM'
*/
if (!((bmp->header.signature[0] == 'B') &&
(bmp->header.signature[1] == 'M'))) {
free(dst);
return NULL;
}
puts("Gzipped BMP image detected!\n");
return bmp;
}
#else
static bmp_image_t *gunzip_bmp(unsigned long addr, unsigned long *lenp)
{
return NULL;
}
#endif
/*
* 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;
int x = 0, y = 0;
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:
addr = simple_strtoul(argv[2], NULL, 16);
x = simple_strtoul(argv[3], NULL, 10);
y = simple_strtoul(argv[4], NULL, 10);
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 (bmp_display(addr, x, y));
} 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> [x y] - display image at x,y\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;
unsigned long len;
if (!((bmp->header.signature[0]=='B') &&
(bmp->header.signature[1]=='M')))
bmp = gunzip_bmp(addr, &len);
if (bmp == NULL) {
printf("There is no valid bmp file at the given address\n");
return 1;
}
printf("Image size : %d x %d\n", le32_to_cpu(bmp->header.width),
le32_to_cpu(bmp->header.height));
printf("Bits per pixel: %d\n", le16_to_cpu(bmp->header.bit_count));
printf("Compression : %d\n", le32_to_cpu(bmp->header.compression));
if ((unsigned long)bmp != addr)
free(bmp);
return(0);
}
/*
* Subroutine: bmp_display
*
* Description: Display bmp file located in memory
*
* Inputs: addr address of the bmp file
*
* Return: None
*
*/
static int bmp_display(ulong addr, int x, int y)
{
int ret;
bmp_image_t *bmp = (bmp_image_t *)addr;
unsigned long len;
if (!((bmp->header.signature[0]=='B') &&
(bmp->header.signature[1]=='M')))
bmp = gunzip_bmp(addr, &len);
if (!bmp) {
printf("There is no valid bmp file at the given address\n");
return 1;
}
#if defined(CONFIG_LCD)
extern int lcd_display_bitmap (ulong, int, int);
ret = lcd_display_bitmap ((unsigned long)bmp, x, y);
#elif defined(CONFIG_VIDEO)
extern int video_display_bitmap (ulong, int, int);
ret = video_display_bitmap ((unsigned long)bmp, x, y);
#else
# error bmp_display() requires CONFIG_LCD or CONFIG_VIDEO
#endif
if ((unsigned long)bmp != addr)
free(bmp);
return ret;
}
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