修改前

修改后

6.0 Recovery 模式横屏修改方法

修改相关文件
bootable\recovery\minui\Android.mk
bootable\recovery\minui\mt_graphic_rotate.cpp
bootable\recovery\minui\mt_graphic_rotate.h
bootable\recovery\minui\graphics_fbdev.cpp
bootable\recovery\minui\minui.h

1、在 Android.mk 中增加 mt_graphic_rotate.cpp 编译项

LOCAL_SRC_FILES := \
    events.cpp \
    graphics.cpp \
    graphics_adf.cpp \
    graphics_drm.cpp \
    graphics_fbdev.cpp \
    resources.cpp \

#cczheng add 
LOCAL_SRC_FILES += mt_graphic_rotate.cpp

2、对比修改 mt_graphic_rotate.cpp，没有则直接复制以下类

/*
* 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.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 rotate_index;
}

#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