Recovery and Charger mode screen rotation 180 degrees [turn]

How to get Recovery (System firmware upgrade),Charger (Power off charge animation) when the screen rotates 180 degrees

Workaround:

1. Find the gr_flip (void) method in the bootable\recovery\minui\graphics.c file

Put memcpy (Gr_framebuffer[gr_active_fb].data,gr_mem_surface.data,

fi.line_length*vi.yres); Revision changed to

rotate_180 (Gr_framebuffer[gr_active_fb].data,gr_mem_surface.data

, fi.line_length*vi.yres);

2. Add a method

void *rotate_180 (void *_dst,const void *_src,int len)

{

int pixelsize = Pixel_size,size,step = number of len/pixelsize;//pixels

unsigned char *dst = _DST;

Const unsigned char *src = _src + len;

while (step--> 0) {

size = Pixelsize;

SRC-=size;

while (size--> 0) {

*dst++ = *src++;

}

SRC-=pixelsize;

}

Return _DST;

}

The function of the rotate_180 method is to reverse the data in buffer by pixels .

Example: Raw data

{(+), (4,5,6), (7,8,9),

(A,b,c), (d,e,f), (G,h,i),

(A,b,c), (d,e,f), (g,h,i)

}

180 degree rotation after data

{(g,h,i), (d,e,f), (A,b,c),

(G,h,i), (d,e,f), (A,b,c),

(7,8,9), (4,5,6), ()

}

The data for each pixel is constant, in pixels, in the order of rotation

This completes the rotation

Recovery and Charger mode screen rotation 180 degrees [turn]