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| author | Yin Kangkai | 2012-02-23 15:56:36 +0800 |
|---|---|---|
| committer | Denys Vlasenko | 2012-02-29 18:07:59 +0100 |
| commit | 3ac066c25670ccf6a992c49340287379c9a342bc (patch) | |
| tree | 6b770e7f114091be3883719fd9bc2f10d5dba5dd | |
| parent | 62c006d508552a6ac547b807eb9ad0a32a76e1c9 (diff) | |
| download | busybox-3ac066c25670ccf6a992c49340287379c9a342bc.zip busybox-3ac066c25670ccf6a992c49340287379c9a342bc.tar.gz | |
fbsplash: use line_length instead of xres * bytes_per_pixel
In some system (e.g. my "strange" device), line_length is not equal xres *
bytes_per_pixel, so we need to use line_length in scr_fix to mmap and draw
rectangle etc.
My "strange" device output this:
bytes_per_pixel: 4
xres: 600, yres: 1024
yoffset: 0, xoffset: 0, line_length: 2432
G.addr: b74da000
Signed-off-by: Yin Kangkai <kangkai.yin@intel.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
| -rw-r--r-- | miscutils/fbsplash.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/miscutils/fbsplash.c b/miscutils/fbsplash.c index 04d583d..988439b 100644 --- a/miscutils/fbsplash.c +++ b/miscutils/fbsplash.c @@ -143,7 +143,7 @@ static void fb_open(const char *strfb_device) // map the device in memory G.addr = mmap(NULL, - G.scr_var.xres * G.scr_var.yres * G.bytes_per_pixel, + G.scr_var.yres * G.scr_fix.line_length, PROT_WRITE, MAP_SHARED, fbfd, 0); if (G.addr == MAP_FAILED) bb_perror_msg_and_die("mmap"); @@ -213,8 +213,8 @@ static void fb_drawrectangle(void) thispix = fb_pixel_value(nred, ngreen, nblue); // horizontal lines - ptr1 = G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * G.bytes_per_pixel; - ptr2 = G.addr + ((G.nbar_posy + G.nbar_height - 1) * G.scr_var.xres + G.nbar_posx) * G.bytes_per_pixel; + ptr1 = G.addr + G.nbar_posy * G.scr_fix.line_length + G.nbar_posx * G.bytes_per_pixel; + ptr2 = G.addr + (G.nbar_posy + G.nbar_height - 1) * G.scr_fix.line_length + G.nbar_posx * G.bytes_per_pixel; cnt = G.nbar_width - 1; do { fb_write_pixel(ptr1, thispix); @@ -224,14 +224,14 @@ static void fb_drawrectangle(void) } while (--cnt >= 0); // vertical lines - ptr1 = G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * G.bytes_per_pixel; - ptr2 = G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx + G.nbar_width - 1) * G.bytes_per_pixel; + ptr1 = G.addr + G.nbar_posy * G.scr_fix.line_length + G.nbar_posx * G.bytes_per_pixel; + ptr2 = G.addr + G.nbar_posy * G.scr_fix.line_length + (G.nbar_posx + G.nbar_width - 1) * G.bytes_per_pixel; cnt = G.nbar_height - 1; do { fb_write_pixel(ptr1, thispix); fb_write_pixel(ptr2, thispix); - ptr1 += G.scr_var.xres * G.bytes_per_pixel; - ptr2 += G.scr_var.xres * G.bytes_per_pixel; + ptr1 += G.scr_fix.line_length; + ptr2 += G.scr_fix.line_length; } while (--cnt >= 0); } @@ -254,7 +254,7 @@ static void fb_drawfullrectangle(int nx1pos, int ny1pos, int nx2pos, int ny2pos, cnt1 = ny2pos - ny1pos; nypos = ny1pos; do { - ptr = G.addr + (nypos * G.scr_var.xres + nx1pos) * G.bytes_per_pixel; + ptr = G.addr + nypos * G.scr_fix.line_length + nx1pos * G.bytes_per_pixel; cnt2 = nx2pos - nx1pos; do { fb_write_pixel(ptr, thispix); |