Android Change boot logo

This is where we operate under Ubuntu. I logged in with the root user, first installing the NETPBM library

execution: Apt-get install NETPBM

for Android The first performance logo is in the kernel, so we have to change the kernel logo.

a . Related changes in the kernel

Compile the Linux kernel logo manufacturing script mklogo.sh, which reads as follows:

#!/bin/shpngtopnm logo.png > Linuxlogo.pnmpnmquant 224 linuxlogo.pnm > LINUXLOGO224.PNMPNMTOPLAINPNM LINUXLOGO224.PNM > LOGO_LINUX_GZSD_CLUT224.PPMRM linuxlogo.pnm linuxlogo224.pnm

Convert your chosen logo to PNG format, named Logo.png and mklogo.sh with the unified path.
Execute./mklogo.sh Final Build logo_linux_gzsd_clut224.ppm

This designation can be freely changed, but must abide by the naming method of Logo_yourname_type, here only the *_clut224.ppm naming method, the other format of the naming method, please see drivers/video/logo/ Makefile file.

Place the logo_linux_gzsd_clut224.ppm file in the drivers/video/logo/directory under the kernel source

Enter the Drivers/video/logo directory

1. Modify the Kconfig file

added: #LOGO之前 in endif

Config LOGO_LINUX_GZSD        bool "GZSD LOGO"        default n

2. Modify the Makefile file

Increase:

obj-$ (CONFIG_LOGO_LINUX_GZSD) + = LOGO_LINUX_GZSD_CLUT224.O

3.logo.c in the function Fb_find_logo if (depth >= 8) is added above:

#ifdef CONFIG_LOGO_LINUX_GZSD
Logo = &logo_linux_gzsd_clut224;
#endif

4.added include/linux/linux_logo.h in the kernel source directory

extern const struct Linux_logo logo_linux_gzsd_clut224;

A daily truth
Perseverance, is thousands of miles of sand and a stone of the cohesion, a little accumulation, only before the head can not see the end of the magnificent, perseverance, is a wisp of spring silkworm spinning around, a silk to insist, only to break the cocoon and see the brilliance of the bright;

5. perform make menuconfig on the terminaland select .

Device Drivers---> Graphics support--->bootup logo--->gzsd logo

save and compile when you exit

6. Disable the LCD console cursor

in the kernel source directory drivers/video/console/fbcon.c

comment out functions: All content within Fb_flashcursor and Fbcon_cursor

7. Make the logo appear next to the screen:

DRIVERS/VIDEO/FBMEM.C

Modify the function Fb_do_show_logo as follows

static void Fb_do_show_logo (struct fb_info *info, struct fb_image *image, int rotate, unsigned int num) {unsigned int x; int Xoff,yoff; /**for Central logo**/Xoff = (Info->var.xres-num * (Fb_logo.logo->width + 8)) >>1; Get next X coordinate Yoff = (Info->var.yres-num * (Fb_logo.logo->height + 8)) >>1; Get the next y-coordinate if (rotate = = Fb_rotate_ur) {for (x = 0; x < num && image->dx + image->width <= info->var. Xres; X + +) {image->dx = Xoff; image->dy = Yoff; Info->fbops->fb_imageblit (info, image); Image->dx + = image-> Width + 8;}} else if (rotate = = Fb_rotate_ud) {for (x = 0; x < num && image->dx >= 0; x + +) {Info->fbops->fb_imag Eblit (info, image); IMAGE-&GT;DX-= Image->width + 8;}} else if (rotate = = FB_ROTATE_CW) {for (x = 0; x < num && image->dy + image->height <= Info->var.yre S X + +) {Info->fbops->fb_imageblit (info, image); Image->dy + = Image->height + 8;}} else if (rotate = = Fb_rotaTE_CCW) {for (x = 0; x < num && image->dy >= 0; + x + +) {Info->fbops->fb_imageblit (info, image); image- >dy-= Image->height + 8;}}}

re-compile can

two. After Android starts flashing screen changes:

path: File system source under the frameworks/base/core/res/assets/images/there are two pictures

Android-logo-mask.png

Android-logo-shine.png

modify these two pictures can be, note please save the original.

Android Change boot logo