原文修改出自简书：https://www.jianshu.com/p/768fdd954061
应该是MTK修改的google源码，支持recovery下屏幕旋转90/180/270, 作者把MTK的修改上传了，验证没有问，可以直接使用，多谢分享
Android O恢复出厂设置时，图标和屏的方向不一致
在alps\bootable\recovery\minui\Android.mk中 添加mt_graphic_rotate.cpp
LOCAL_SRC_FILES := \
events.cpp \
graphics.cpp \
graphics_adf.cpp \
graphics_drm.cpp \
graphics_fbdev.cpp \
resources.cpp \
mt_graphic_rotate.cpp
在alps\bootable\recovery\minui\graphics_fbdev.cpp中做修改
#if 0
Blank(true);
Blank(false);
#endif
// return gr_draw;//mtk delete
return rotate_canvas_get(gr_draw);//mtk add
GRSurface* MinuiBackendFbdev::Flip() {
rotate_surface(gr_draw, rotate_canvas_get(gr_draw));//mtk add
if (double_buffered) {
} else {
// Copy from the in-memory surface to the framebuffer.
memcpy(gr_framebuffer[0].data, gr_draw->data, gr_draw->height * gr_draw->row_bytes);
}
// return gr_draw;//mtk delete
return rotate_canvas_get(gr_draw);//mtk add
rotate_canvas_exit();//mtk add
if (!double_buffered && gr_draw) {
free(gr_draw->data);
free(gr_draw);
}
创建alps\bootable\recovery\minui\mt_graphic_rotate.cpp
/*
* Copyright (C) 2014 MediaTek Inc.
* Modification based on code covered by the mentioned copyright
* and/or permission notice(s).
*/
#include <stdbool.h>
#include <stdlib.h>
#include <unistd.h>
#include <inttypes.h>
#include <fcntl.h>
#include <stdio.h>
#include <sys/cdefs.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <linux/fb.h>
#include <linux/kd.h>
#include "minui/minui.h"
#include "graphics.h"
GRSurface __gr_canvas;
GRSurface* gr_canvas = NULL;
int rotate_index=-1;
static void print_surface_info(GRSurface *s, const char *name)
{
printf("[graphics] %s > Height:%d, Width:%d, PixelBytes:%d, RowBytes:%d, Size:%d, Data: 0x%08" PRIxPTR "\n",
name, s->height, s->width, s->pixel_bytes, s->row_bytes, s->height* s->row_bytes, (uintptr_t) s->data);
}
// Read configuration from MTK_LCM_PHYSICAL_ROTATION
#ifndef MTK_LCM_PHYSICAL_ROTATION
#define MTK_LCM_PHYSICAL_ROTATION "undefined"
#endif
static int rotate_config(GRSurface *gr_draw)
{
if (rotate_index<0)
{
if (gr_draw->pixel_bytes != 4) rotate_index=0; // support 4 bytes pixel only
else if (0 == strncmp(MTK_LCM_PHYSICAL_ROTATION, "90", 2))
{
rotate_index=1;
}
else if (0 == strncmp(MTK_LCM_PHYSICAL_ROTATION, "180", 3))
{
rotate_index=2;
}
else if (0 == strncmp(MTK_LCM_PHYSICAL_ROTATION, "270", 3)) rotate_index=3;
else rotate_index=0;
printf("[graphics] rotate_config %d %s\n", rotate_index, MTK_LCM_PHYSICAL_ROTATION);
}
return 3;//mtk /*修改这个值可以改变图标的方向*/
}
#define swap(x, y, type) {type z; z=x; x=y; y=z;}
// Allocate and setup the canvas object
void rotate_canvas_init(GRSurface *gr_draw)
{
gr_canvas = &__gr_canvas;
memcpy(gr_canvas, gr_draw, sizeof(GRSurface));
// Swap canvas' height and width, if the rotate angle is 90" or 270"
if (rotate_config(gr_draw)%2) {
swap(gr_canvas->width, gr_canvas->height, int);
gr_canvas->row_bytes = gr_canvas->width * gr_canvas->pixel_bytes;
}
gr_canvas->data = (unsigned char*) malloc(gr_canvas->height * gr_canvas->row_bytes);
if (gr_canvas->data == NULL) {
printf("[graphics] rotate_canvas_init() malloc gr_canvas->data failed\n");
gr_canvas = NULL;
return;
}
memset(gr_canvas->data, 0, gr_canvas->height * gr_canvas->row_bytes);
print_surface_info(gr_draw, "gr_draw");
print_surface_info(gr_canvas, "gr_canvas");
}
// Cleanup the canvas
void rotate_canvas_exit(void)
{
if (gr_canvas) {
if (gr_canvas->data)
free(gr_canvas->data);
free(gr_canvas);
}
gr_canvas=NULL;
}
// Return the canvas object
GRSurface *rotate_canvas_get(GRSurface *gr_draw)
{
// Initialize the canvas, if it was not exist.
if (gr_canvas==NULL)
rotate_canvas_init(gr_draw);
return gr_canvas;
}
// Surface Rotate Routines
static void rotate_surface_0(GRSurface *dst, GRSurface *src)
{
memcpy(dst->data, src->data, src->height*src->row_bytes);
}
static void rotate_surface_270(GRSurface *dst, GRSurface *src)
{
int v, w, h;
unsigned int *src_pixel;
unsigned int *dst_pixel;
for (h=0, v=src->width-1; h<dst->height; h++, v--) {
for (w=0; w<dst->width; w++) {
dst_pixel = (unsigned int *)(dst->data + dst->row_bytes*h);
src_pixel = (unsigned int *)(src->data + src->row_bytes*w);
*(dst_pixel+w)=*(src_pixel+v);
}
}
}
static void rotate_surface_180(GRSurface *dst, GRSurface *src)
{
int v, w, k, h;
unsigned int *src_pixel;
unsigned int *dst_pixel;
for (h=0, k=src->height-1; h<dst->height && k>=0 ; h++, k--) {
dst_pixel = (unsigned int *)(dst->data + dst->row_bytes*h);
src_pixel = (unsigned int *)(src->data + src->row_bytes*k);
for (w=0, v=src->width-1; w<dst->width && v>=0; w++, v--) {
*(dst_pixel+w)=*(src_pixel+v);
}
}
}
static void rotate_surface_90(GRSurface *dst, GRSurface *src)
{
int w, k, h;
unsigned int *src_pixel;
unsigned int *dst_pixel;
for (h=0; h<dst->height; h++) {
for (w=0, k=src->height-1; w<dst->width; w++, k--) {
dst_pixel = (unsigned int *)(dst->data + dst->row_bytes*h);
src_pixel = (unsigned int *)(src->data + src->row_bytes*k);
*(dst_pixel+w)=*(src_pixel+h);
}
}
}
typedef void (*rotate_surface_t) (GRSurface *, GRSurface *);
rotate_surface_t rotate_func[4]=
{
rotate_surface_0,
rotate_surface_90,
rotate_surface_180,
rotate_surface_270
};
// rotate and copy src* surface to dst surface
void rotate_surface(GRSurface *dst, GRSurface *src)
{
rotate_surface_t rotate;
rotate=rotate_func[rotate_config(dst)];
rotate(dst, src);
}
创建alps\bootable\recovery\minui\mt_graphic_rotate.h
/*
* Copyright (C) 2014 MediaTek Inc.
* Modification based on code covered by the mentioned copyright
* and/or permission notice(s).
*/
#ifndef MT_GRAPHICS_ROTATE_H_
#define MT_GRAPHICS_ROTATE_H_
#include "minui/minui.h"
void rotate_canvas_exit(void);
void rotate_canvas_init(GRSurface *gr_draw);
void rotate_surface(GRSurface *dst, GRSurface *src);
GRSurface *rotate_canvas_get(GRSurface *gr_draw);
#endif