common/cmd_bmp.c

   1 /*
   2  * (C) Copyright 2002
   3  * Detlev Zundel, DENX Software Engineering, dzu@denx.de.
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 /*
  25  * BMP handling routines
  26  */
  27
  28 #include <common.h>
  29 #include <bmp_layout.h>
  30 #include <command.h>
  31 #include <asm/byteorder.h>
  32 #include <malloc.h>
  33
  34 static int bmp_info (ulong addr);
  35 static int bmp_display (ulong addr, int x, int y);
  36
  37 int gunzip(void *, int, unsigned char *, unsigned long *);
  38
  39 /*
  40  * Allocate and decompress a BMP image using gunzip().
  41  *
  42  * Returns a pointer to the decompressed image data. Must be freed by
  43  * the caller after use.
  44  *
  45  * Returns NULL if decompression failed, or if the decompressed data
  46  * didn't contain a valid BMP signature.
  47  */
  48 #ifdef CONFIG_VIDEO_BMP_GZIP
  49 static bmp_image_t *gunzip_bmp(unsigned long addr, unsigned long *lenp)
  50 {
  51         void *dst;
  52         unsigned long len;
  53         bmp_image_t *bmp;
  54
  55         /*
  56          * Decompress bmp image
  57          */
  58         len = CFG_VIDEO_LOGO_MAX_SIZE;
  59         dst = malloc(CFG_VIDEO_LOGO_MAX_SIZE);
  60         if (dst == NULL) {
  61                 puts("Error: malloc in gunzip failed!\n");
  62                 return NULL;
  63         }
  64         if (gunzip(dst, CFG_VIDEO_LOGO_MAX_SIZE, (uchar *)addr, &len) != 0) {
  65                 free(dst);
  66                 return NULL;
  67         }
  68         if (len == CFG_VIDEO_LOGO_MAX_SIZE)
  69                 puts("Image could be truncated"
  70                                 " (increase CFG_VIDEO_LOGO_MAX_SIZE)!\n");
  71
  72         bmp = dst;
  73
  74         /*
  75          * Check for bmp mark 'BM'
  76          */
  77         if (!((bmp->header.signature[0] == 'B') &&
  78               (bmp->header.signature[1] == 'M'))) {
  79                 free(dst);
  80                 return NULL;
  81         }
  82
  83         puts("Gzipped BMP image detected!\n");
  84
  85         return bmp;
  86 }
  87 #else
  88 static bmp_image_t *gunzip_bmp(unsigned long addr, unsigned long *lenp)
  89 {
  90         return NULL;
  91 }
  92 #endif
  93
  94
  95 /*
  96  * Subroutine:  do_bmp
  97  *
  98  * Description: Handler for 'bmp' command..
  99  *
 100  * Inputs:      argv[1] contains the subcommand
 101  *
 102  * Return:      None
 103  *
 104  */
 105 int do_bmp(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 106 {
 107         ulong addr;
 108         int x = 0, y = 0;
 109
 110         switch (argc) {
 111         case 2:         /* use load_addr as default address */
 112                 addr = load_addr;
 113                 break;
 114         case 3:         /* use argument */
 115                 addr = simple_strtoul(argv[2], NULL, 16);
 116                 break;
 117         case 5:
 118                 addr = simple_strtoul(argv[2], NULL, 16);
 119                 x = simple_strtoul(argv[3], NULL, 10);
 120                 y = simple_strtoul(argv[4], NULL, 10);
 121                 break;
 122         default:
 123                 printf ("Usage:\n%s\n", cmdtp->usage);
 124                 return 1;
 125         }
 126
 127         /* Allow for short names
 128          * Adjust length if more sub-commands get added
 129          */
 130         if (strncmp(argv[1],"info",1) == 0) {
 131                 return (bmp_info(addr));
 132         } else if (strncmp(argv[1],"display",1) == 0) {
 133             return (bmp_display(addr, x, y));
 134         } else {
 135                 printf ("Usage:\n%s\n", cmdtp->usage);
 136                 return 1;
 137         }
 138 }
 139
 140 U_BOOT_CMD(
 141         bmp,    5,      1,      do_bmp,
 142         "bmp     - manipulate BMP image data\n",
 143         "info <imageAddr>          - display image info\n"
 144         "bmp display <imageAddr> [x y] - display image at x,y\n"
 145 );
 146
 147 /*
 148  * Subroutine:  bmp_info
 149  *
 150  * Description: Show information about bmp file in memory
 151  *
 152  * Inputs:      addr            address of the bmp file
 153  *
 154  * Return:      None
 155  *
 156  */
 157 static int bmp_info(ulong addr)
 158 {
 159         bmp_image_t *bmp=(bmp_image_t *)addr;
 160         unsigned long len;
 161
 162         if (!((bmp->header.signature[0]=='B') &&
 163               (bmp->header.signature[1]=='M')))
 164                 bmp = gunzip_bmp(addr, &len);
 165
 166         if (bmp == NULL) {
 167                 printf("There is no valid bmp file at the given address\n");
 168                 return 1;
 169         }
 170
 171         printf("Image size    : %d x %d\n", le32_to_cpu(bmp->header.width),
 172                le32_to_cpu(bmp->header.height));
 173         printf("Bits per pixel: %d\n", le16_to_cpu(bmp->header.bit_count));
 174         printf("Compression   : %d\n", le32_to_cpu(bmp->header.compression));
 175
 176         if ((unsigned long)bmp != addr)
 177                 free(bmp);
 178
 179         return(0);
 180 }
 181
 182 /*
 183  * Subroutine:  bmp_display
 184  *
 185  * Description: Display bmp file located in memory
 186  *
 187  * Inputs:      addr            address of the bmp file
 188  *
 189  * Return:      None
 190  *
 191  */
 192 static int bmp_display(ulong addr, int x, int y)
 193 {
 194         int ret;
 195         bmp_image_t *bmp = (bmp_image_t *)addr;
 196         unsigned long len;
 197
 198         if (!((bmp->header.signature[0]=='B') &&
 199               (bmp->header.signature[1]=='M')))
 200                 bmp = gunzip_bmp(addr, &len);
 201
 202         if (!bmp) {
 203                 printf("There is no valid bmp file at the given address\n");
 204                 return 1;
 205         }
 206
 207 #if defined(CONFIG_LCD)
 208         extern int lcd_display_bitmap (ulong, int, int);
 209
 210         ret = lcd_display_bitmap ((unsigned long)bmp, x, y);
 211 #elif defined(CONFIG_VIDEO)
 212         extern int video_display_bitmap (ulong, int, int);
 213
 214         ret = video_display_bitmap ((unsigned long)bmp, x, y);
 215 #else
 216 # error bmp_display() requires CONFIG_LCD or CONFIG_VIDEO
 217 #endif
 218
 219         if ((unsigned long)bmp != addr)
 220                 free(bmp);
 221
 222         return ret;
 223 }