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#include <stdio.h>
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//open lseek
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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//close write read lseek
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#include <unistd.h>
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//mmap
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#include <sys/mman.h>
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//输入子系统头文件
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#include <linux/input.h>
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//函数申明
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//打开触摸屏设备文件
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void ts_open();
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//打开模拟器LCD屏设备文件
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void lcd_open();
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//关闭触摸屏设备文件
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void ts_close();
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//关闭模拟器LCD屏设备文件
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void lcd_close();
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//获取坐标
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void get_xy(int *x,int *y);
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//图片显示，显示某个大小某一个位置某张图片
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int bmp_show(char *pic_path,int x,int y,int w,int h);
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//功能一：相册
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void photo();
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//全局变量
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int ts_fd;
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int lcd_fd;
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unsigned *FB;
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int pos_x,pos_y;
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int main(int argc, char const *argv[])
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{
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/****************一、打开设备文件*******************/
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ts_open();
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lcd_open();
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/****************二、程序逻辑代码*******************/
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bmp_show("./main.bmp",0,0,800,480);
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while (1)
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{
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get_xy(&pos_x,&pos_y);
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if(pos_x > 84 && pos_x < 296 && pos_y > 213 && pos_y < 424) //坐标 68 278 218 428
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{
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printf("进入相册功能\n");
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photo();
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}
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// printf("(%d,%d)\n",pos_x,pos_y);
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}
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/****************三、关闭设备文件*******************/
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ts_close();
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lcd_close();
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return 0;
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}
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//打开触摸屏设备文件
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void ts_open()
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{
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// 1.打开模拟器的触摸屏设备文件（"/dev/ubuntu_event"）
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ts_fd = open("/dev/ubuntu_event",O_RDWR);
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if(ts_fd == -1)
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{
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perror("打开模拟器的触摸屏设备文件失败");
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}
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}
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//打开模拟器LCD屏设备文件
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void lcd_open()
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{
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// 1.打开LCD屏幕（设备文件："/dev/fb0"）
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lcd_fd=open("/dev/ubuntu_lcd",O_RDWR);
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if(lcd_fd == -1)
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{
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perror("打开LCD屏失败");
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}
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//映射内存
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FB = mmap(NULL,4*800*480,PROT_READ|PROT_WRITE,MAP_SHARED,lcd_fd,0);
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}
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//关闭触摸屏设备文件
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void ts_close()
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{
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// 3.关闭模拟器的触摸屏设备文件
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close(ts_fd);
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}
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//关闭模拟器LCD屏设备文件
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void lcd_close()
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{
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//解除映射
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munmap(FB,4*800*480);
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// 6.关闭LCD设备文件的文件描述符
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close(lcd_fd);
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}
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//获取坐标
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void get_xy(int *x,int *y)
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{
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// 2.读取坐标信息，存储在信息结构体中
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struct input_event ts_buf;
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int x_read = 0;
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int y_read = 0;
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while (1)
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{
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//产生堵塞，获取x，y的值
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read(ts_fd,&ts_buf,sizeof(ts_buf));
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if(ts_buf.type == EV_ABS && ts_buf.code == ABS_X)
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{
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*x = ts_buf.value;
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x_read = 1;
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}
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else if (ts_buf.type == EV_ABS && ts_buf.code == ABS_Y && y_read == 0)
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{
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*y = ts_buf.value;
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y_read = 1;
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}
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else if(x_read == 1 && y_read == 1)
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{
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break;
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}
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}
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}
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//图片显示，显示某个大小某一个位置某张图片
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int bmp_show(char *pic_path,int x,int y,int w,int h)
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{
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//映射新的显存
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unsigned *new_FB = FB + (x+y*800);
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// 2.打开BMP文件
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int bmp_fd = open(pic_path,O_RDWR);
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if (bmp_fd == -1)
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{
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perror("打开图片失败");
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return -1;
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}
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// 3.读取BMP中的RGB的数据
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//将图片文件头和信息头读完（54个字节）
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unsigned char bmp_info[54]={0};
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read(bmp_fd,bmp_info,sizeof(bmp_info));
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//读取BMP中的RGB数据
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unsigned char bmp_buf[w*h*3];
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read(bmp_fd,bmp_buf,sizeof(bmp_buf));
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// 4.将aRGB颜色写入到LCD屏中
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//将3字节RGB数据转换为4字节aRGB数据
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unsigned int lcd_buf[w*h];
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for(int i = 0;i<w*h;i++)
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{
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//像素 蓝分量 绿分量 红分量 灰度
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lcd_buf[i] = bmp_buf[i*3] << 0 | bmp_buf[i*3+1] << 8 | bmp_buf[i*3+2] << 16 | 0x00 << 24;
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}
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int n ,m;
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//图片上下颠倒
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unsigned int lcd_buf1[w*h];
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for(m=0;m<h;m++)
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{
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for(n=0;n<w;n++)
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{
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lcd_buf1[n+m*w] = lcd_buf[n+(h-m)*w];
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}
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}
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//显示图片
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for(m=0;m<h;m++)
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{
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for(n=0;n<w;n++)
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{
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*(new_FB+n+m*800) = lcd_buf1[n+m*w];
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}
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}
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// 5.关闭BMP文件
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close(bmp_fd);
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return 0;
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}
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//功能一：相册
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void photo()
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{
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char *pic[3]={"./1.bmp","./2.bmp","./3.bmp"};
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bmp_show("./photo.bmp",0,0,800,480);
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int i = -1;
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while (1)
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{
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get_xy(&pos_x,&pos_y);
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if(pos_x > 0 && pos_x < 80 && pos_y > 0 && pos_y < 480)
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{
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printf("显示上一张图片\n");
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i--;
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if(i < 0)
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{
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i=2;
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}
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bmp_show(pic[i],80,0,640,480);
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}
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else if(pos_x > 720 && pos_x < 800 && pos_y > 0 && pos_y < 480)
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{
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printf("显示下一张图片\n");
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i++;
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if(i>2)
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{
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i=0;
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}
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bmp_show(pic[i],80,0,640,480);
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}
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else if(pos_x > 300 && pos_x < 510 && pos_y > 165 && pos_y < 365)
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{
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printf("返回主界面\n");
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bmp_show("./main.bmp",0,0,800,480);
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break;
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}
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}
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}
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