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#include <common.h>
#include <command.h>
#include <fs.h>
#include <linux/stat.h>
#include <errno.h>
#include <malloc.h>
#include <getopt.h>
#include <fcntl.h>
#include <fb.h>
#include <bmp_layout.h>
#include <asm/byteorder.h>
static inline void set_pixel(struct fb_info *info, void *adr, int r, int g, int b)
{
u32 px;
px = (r >> (8 - info->red.length)) << info->red.offset |
(g >> (8 - info->green.length)) << info->green.offset |
(b >> (8 - info->blue.length)) << info->blue.offset;
switch (info->bits_per_pixel) {
case 8:
break;
case 16:
*(u16 *)adr = px;
break;
case 32:
*(u32 *)adr = px;
break;
}
}
static int do_bmp(int argc, char *argv[])
{
int ret, opt, fd;
char *fbdev = "/dev/fb0";
void *fb, *offscreenbuf = NULL;
struct fb_info info;
struct bmp_image *bmp;
char *bmpfile;
int bmpsize;
char *image;
int sw, sh, width, height, startx = -1, starty = -1;
int bits_per_pixel, fbsize;
int xres, yres;
int offscreen = 0;
void *adr, *buf;
while((opt = getopt(argc, argv, "f:x:y:o")) > 0) {
switch(opt) {
case 'f':
fbdev = optarg;
break;
case 'x':
startx = simple_strtoul(optarg, NULL, 0);
break;
case 'y':
starty = simple_strtoul(optarg, NULL, 0);
case 'o':
offscreen = 1;
}
}
if (optind == argc) {
printf("no filename given\n");
return 1;
}
bmpfile = argv[optind];
fd = open(fbdev, O_RDWR);
if (fd < 0) {
perror("open");
return 1;
}
fb = memmap(fd, PROT_READ | PROT_WRITE);
if (fb == (void *)-1) {
perror("memmap");
goto failed_memmap;
}
ret = ioctl(fd, FBIOGET_SCREENINFO, &info);
if (ret) {
perror("ioctl");
goto failed_memmap;
}
xres = info.xres;
yres = info.yres;
bmp = read_file(bmpfile, &bmpsize);
if (!bmp) {
printf("unable to read %s\n", bmpfile);
goto failed_memmap;
}
if (bmp->header.signature[0] != 'B' ||
bmp->header.signature[1] != 'M') {
printf("No valid bmp file\n");
}
sw = le32_to_cpu(bmp->header.width);
sh = le32_to_cpu(bmp->header.height);
if (startx < 0) {
startx = (xres - sw) / 2;
if (startx < 0)
startx = 0;
}
if (starty < 0) {
starty = (yres - sh) / 2;
if (starty < 0)
starty = 0;
}
width = min(sw, xres - startx);
height = min(sh, yres - starty);
bits_per_pixel = le16_to_cpu(bmp->header.bit_count);
fbsize = xres * yres * (info.bits_per_pixel >> 3);
if (offscreen) {
/* Don't fail if malloc fails, just continue rendering directly
* on the framebuffer
*/
offscreenbuf = malloc(fbsize);
if (offscreenbuf)
memcpy(offscreenbuf, fb, fbsize);
}
buf = offscreenbuf ? offscreenbuf : fb;
if (bits_per_pixel == 8) {
int x, y;
struct bmp_color_table_entry *color_table = bmp->color_table;
for (y = 0; y < height; y++) {
image = (char *)bmp +
le32_to_cpu(bmp->header.data_offset);
image += (sh - y - 1) * sw * (bits_per_pixel >> 3);
adr = buf + ((y + starty) * xres + startx) *
(info.bits_per_pixel >> 3);
for (x = 0; x < width; x++) {
int pixel;
pixel = *image;
set_pixel(&info, adr, color_table[pixel].red,
color_table[pixel].green,
color_table[pixel].blue);
adr += info.bits_per_pixel >> 3;
image += bits_per_pixel >> 3;
}
}
} else if (bits_per_pixel == 24) {
int x, y;
for (y = 0; y < height; y++) {
image = (char *)bmp +
le32_to_cpu(bmp->header.data_offset);
image += (sh - y - 1) * sw * (bits_per_pixel >> 3);
adr = buf + ((y + starty) * xres + startx) *
(info.bits_per_pixel >> 3);
for (x = 0; x < width; x++) {
char *pixel;
pixel = image;
set_pixel(&info, adr, pixel[2], pixel[1],
pixel[0]);
adr += info.bits_per_pixel >> 3;
image += bits_per_pixel >> 3;
}
}
} else
printf("bmp: illegal bits per pixel value: %d\n", bits_per_pixel);
if (offscreenbuf) {
memcpy(fb, offscreenbuf, fbsize);
free(offscreenbuf);
}
free(bmp);
close(fd);
return 0;
failed_memmap:
close(fd);
return 1;
}
BAREBOX_CMD_HELP_START(bmp)
BAREBOX_CMD_HELP_USAGE("bmp [OPTIONS] FILE\n")
BAREBOX_CMD_HELP_SHORT("Show the bitmap FILE on the framebuffer.\n")
BAREBOX_CMD_HELP_OPT ("-f <fb>", "framebuffer device (/dev/fb0)\n")
BAREBOX_CMD_HELP_OPT ("-x <xofs>", "x offset (default center)\n")
BAREBOX_CMD_HELP_OPT ("-y <yofs>", "y offset (default center)\n")
BAREBOX_CMD_HELP_OPT ("-o", "render offscreen\n")
BAREBOX_CMD_HELP_END
/**
* @page bmp_command
This command displays a graphics in the bitmap (.bmp) format on the
framebuffer. Currently the bmp command supports images with 8 and 24 bit
color depth.
\todo What does the -o (offscreen) option do?
*/
BAREBOX_CMD_START(bmp)
.cmd = do_bmp,
.usage = "show a bmp image",
BAREBOX_CMD_HELP(cmd_bmp_help)
BAREBOX_CMD_END
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