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 <lcd.h>
  30 #include <bmp_layout.h>
  31 #include <command.h>
  32 #include <asm/byteorder.h>
  33 #include <malloc.h>
  34
  35 static int bmp_info (ulong addr);
  36 static int bmp_display (ulong addr, int x, int y);
  37
  38 /*
  39  * Allocate and decompress a BMP image using gunzip().
  40  *
  41  * Returns a pointer to the decompressed image data. Must be freed by
  42  * the caller after use.
  43  *
  44  * Returns NULL if decompression failed, or if the decompressed data
  45  * didn't contain a valid BMP signature.
  46  */
  47 #ifdef CONFIG_VIDEO_BMP_GZIP
  48 bmp_image_t *gunzip_bmp(unsigned long addr, unsigned long *lenp)
  49 {
  50         void *dst;
  51         unsigned long len;
  52         bmp_image_t *bmp;
  53
  54         /*
  55          * Decompress bmp image
  56          */
  57         len = CONFIG_SYS_VIDEO_LOGO_MAX_SIZE;
  58         dst = malloc(CONFIG_SYS_VIDEO_LOGO_MAX_SIZE);
  59         if (dst == NULL) {
  60                 puts("Error: malloc in gunzip failed!\n");
  61                 return NULL;
  62         }
  63         if (gunzip(dst, CONFIG_SYS_VIDEO_LOGO_MAX_SIZE, (uchar *)addr, &len) != 0) {
  64                 free(dst);
  65                 return NULL;
  66         }
  67         if (len == CONFIG_SYS_VIDEO_LOGO_MAX_SIZE)
  68                 puts("Image could be truncated"
  69                                 " (increase CONFIG_SYS_VIDEO_LOGO_MAX_SIZE)!\n");
  70
  71         bmp = dst;
  72
  73         /*
  74          * Check for bmp mark 'BM'
  75          */
  76         if (!((bmp->header.signature[0] == 'B') &&
  77               (bmp->header.signature[1] == 'M'))) {
  78                 free(dst);
  79                 return NULL;
  80         }
  81
  82         puts("Gzipped BMP image detected!\n");
  83
  84         return bmp;
  85 }
  86 #else
  87 bmp_image_t *gunzip_bmp(unsigned long addr, unsigned long *lenp)
  88 {
  89         return NULL;
  90 }
  91 #endif
  92
  93
  94 /*
  95  * Subroutine:  do_bmp
  96  *
  97  * Description: Handler for 'bmp' command..
  98  *
  99  * Inputs:      argv[1] contains the subcommand
 100  *
 101  * Return:      None
 102  *
 103  */
 104 int do_bmp(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
 105 {
 106         ulong addr;
 107         int x = 0, y = 0;
 108
 109         switch (argc) {
 110         case 2:         /* use load_addr as default address */
 111                 addr = load_addr;
 112                 break;
 113         case 3:         /* use argument */
 114                 addr = simple_strtoul(argv[2], NULL, 16);
 115                 break;
 116         case 5:
 117                 addr = simple_strtoul(argv[2], NULL, 16);
 118                 x = simple_strtoul(argv[3], NULL, 10);
 119                 y = simple_strtoul(argv[4], NULL, 10);
 120                 break;
 121         default:
 122                 cmd_usage(cmdtp);
 123                 return 1;
 124         }
 125
 126         /* Allow for short names
 127          * Adjust length if more sub-commands get added
 128          */
 129         if (strncmp(argv[1],"info",1) == 0) {
 130                 return (bmp_info(addr));
 131         } else if (strncmp(argv[1],"display",1) == 0) {
 132             return (bmp_display(addr, x, y));
 133         } else {
 134                 cmd_usage(cmdtp);
 135                 return 1;
 136         }
 137 }
 138
 139 U_BOOT_CMD(
 140         bmp,    5,      1,      do_bmp,
 141         "manipulate BMP image data",
 142         "info <imageAddr>          - display image info\n"
 143         "bmp display <imageAddr> [x y] - display image at x,y"
 144 );
 145
 146 /*
 147  * Subroutine:  bmp_info
 148  *
 149  * Description: Show information about bmp file in memory
 150  *
 151  * Inputs:      addr            address of the bmp file
 152  *
 153  * Return:      None
 154  *
 155  */
 156 static int bmp_info(ulong addr)
 157 {
 158         bmp_image_t *bmp=(bmp_image_t *)addr;
 159         unsigned long len;
 160
 161         if (!((bmp->header.signature[0]=='B') &&
 162               (bmp->header.signature[1]=='M')))
 163                 bmp = gunzip_bmp(addr, &len);
 164
 165         if (bmp == NULL) {
 166                 printf("There is no valid bmp file at the given address\n");
 167                 return 1;
 168         }
 169
 170         printf("Image size    : %d x %d\n", le32_to_cpu(bmp->header.width),
 171                le32_to_cpu(bmp->header.height));
 172         printf("Bits per pixel: %d\n", le16_to_cpu(bmp->header.bit_count));
 173         printf("Compression   : %d\n", le32_to_cpu(bmp->header.compression));
 174
 175         if ((unsigned long)bmp != addr)
 176                 free(bmp);
 177
 178         return(0);
 179 }
 180
 181 /*
 182  * Subroutine:  bmp_display
 183  *
 184  * Description: Display bmp file located in memory
 185  *
 186  * Inputs:      addr            address of the bmp file
 187  *
 188  * Return:      None
 189  *
 190  */
 191 static int bmp_display(ulong addr, int x, int y)
 192 {
 193         int ret;
 194         bmp_image_t *bmp = (bmp_image_t *)addr;
 195         unsigned long len;
 196
 197         if (!((bmp->header.signature[0]=='B') &&
 198               (bmp->header.signature[1]=='M')))
 199                 bmp = gunzip_bmp(addr, &len);
 200
 201         if (!bmp) {
 202                 printf("There is no valid bmp file at the given address\n");
 203                 return 1;
 204         }
 205
 206 #if defined(CONFIG_LCD)
 207         extern int lcd_display_bitmap (ulong, int, int);
 208
 209         ret = lcd_display_bitmap ((unsigned long)bmp, x, y);
 210 #elif defined(CONFIG_VIDEO)
 211         extern int video_display_bitmap (ulong, int, int);
 212
 213         ret = video_display_bitmap ((unsigned long)bmp, x, y);
 214 #else
 215 # error bmp_display() requires CONFIG_LCD or CONFIG_VIDEO
 216 #endif
 217
 218         if ((unsigned long)bmp != addr)
 219                 free(bmp);
 220
 221         return ret;
 222 }