基于GEC6818开发板的相册

一，实现的功能

1.图片的显示

2.上滑，下滑，左滑，右滑切换图片

3.幻灯片播放相册

4.显示图片的缩略图

二，代码实现

pic.h

#ifndef __PIC__H_
#define __PIC__H_#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <stdlib.h>
#include <unistd.h>
#include <linux/input.h>typedef enum DIRECTION{UP,DOWN,LEFT,RIGHT
}DIRECTION;typedef struct point{int x;int y;
}point;struct node{char pics[20];struct node *next;
};struct Linked{struct node *first;struct node *last;int nodeNum;
};int save_color[800][800];
extern void add_node(struct Linked *l,struct node *p);//增加数据结点
extern struct Linked *Create_link(struct Linked *l);//创建链表存储图片文件名
void show_bmp(int x0,int y0,char * pic,int flag);//显示图片extern void lcd_draw_point(int x,int y,int color);//画点
extern int get_slip_way();//获取滑动方式
void print_test(struct Linked *l);
void show_mulu(int x0,int y0,struct Linked *l);//显示目录
void lcd_draw_point_mulu(int w,int h,int x,int y,int color);//目录画点
point touch();//获取点击事件
void control();//控制整个程序的运行
int touch_bool();//判断是否点击
void show_left(int i,char *pic);//左滑显示下一张
void show_right(int i,char *pic);//右滑显示上一张
void show_up(int i,char *pic);//上滑显示下一张
void show_down(int i,char *pic);//下滑显示上一张void play_pic(struct Linked * l);//幻灯片播放void show_cril(int i,char *pic);//画圆显示#endif

main.c

#include "pic.h"int *plcd = NULL;
/*lcd_draw_point:画点@x:横坐标@y:纵坐标@color:颜色
*/void lcd_draw_point(int x,int y,int color)
{if(x>=0 && x <800 && y >= 0 && y<480){*(plcd+y*800+x) = color;}}int main()
{struct Linked *l = Create_link(l);int lcd_fd = open("/dev/fb0",O_RDWR);if(lcd_fd == -1){perror("open error\n");return -1;}plcd = mmap(NULL,800*480*4,PROT_READ | PROT_WRITE, MAP_SHARED,lcd_fd,0);show_bmp(0,0,"mu.bmp",1);touch();show_mulu(0, 0,l);munmap(plcd,800*480*4);close(lcd_fd);
}

获取滑动方向，控制图片切换

#include "pic.h"/*get_slip_way:获取滑动方向
*/int get_slip_way()
{point p1;p1.x = -1;p1.y = -1;point p2;p1.x = -1;p1.y = -1;int fd = open("/dev/input/event0",O_RDWR);if(fd == 0){perror("open error\n");return -1;}struct  input_event ev;int ret;int flag = 0;int count = 0;while(1){ret = read(fd,&ev,sizeof(ev));if(ret != sizeof(ev)){close(fd);perror("read error");return -1;}//判断触摸事件，并获取X值if(ev.type == EV_ABS && ev.code == ABS_X){if(p1.x < 0){p1.x = ev.value;}else{p2.x = ev.value;}}if(ev.type == EV_ABS && ev.code == ABS_Y){if(p1.y < 0){p1.y = ev.value;}else{p2.y = ev.value;}}if(ev.type == EV_KEY && ev.code == BTN_TOUCH && ev.value==0){int dt_x = abs(p1.x - p2.x);int dt_y = abs(p1.y - p2.y);if(dt_x > 2*dt_y){if(p1.x > p2.x){return LEFT;}if(p1.x < p2.x){return RIGHT;}}else if (2*dt_x < dt_y){if(p1.y > p2.y){return UP;}if(p1.y < p2.y){return DOWN;}}else{p1.x = -1;p1.y = -1; p2.x = -1;p2.y = -1; }}}
}/*control:控制图片的转换*/
void control()
{char pic[100] = {0};int i = 1;struct Linked *l = Create_link(l);while(1){DIRECTION x = get_slip_way();switch (x){case UP: if(++i >= 14){i = 1;}show_cril(i,pic);show_bmp(0,0,"100.bmp",1);break;case LEFT:if(++i >= 14){i = 1;}show_left(i,pic);show_bmp(0,0,"100.bmp",1);break;case DOWN:if(--i == 0){i = 13;}show_down(i,pic);show_bmp(0,0,"100.bmp",1);break;case RIGHT:if(--i == 0){i = 13;}show_right(i,pic);show_bmp(0,0,"100.bmp",1);break;default:break;}point p = touch();printf("x = %d y = %d\n",p.x,p.y);if(p.x>=0&&p.x<90&&p.y>=0&&p.y<90){show_mulu(0, 0, l);show_bmp(360, 0, "play.bmp", 1);p = touch();printf("x = %d y = %d\n",p.x,p.y);if(p.x>360&&p.x<=460&&p.y>=0&&p.y<=90){play_pic(l);}}}}

幻灯片播放

#include "pic.h"/*play_pic:播放图片@l:存储数据的链表
*/void play_pic(struct Linked *l)
{struct node *p = l->first;int flag = 1;//控制不同的播放方式char pic[100];int i = 1;while(p){if(flag == 1){show_down(i,pic);flag++;}else if(flag == 2){show_left(i,pic);flag++;}else if(flag == 3){show_up(i,pic);flag++;}else if(flag == 4){show_right(i,pic);flag ++;}else if(flag == 5){flag = 1;}i++;p = p->next;}}

保存图片到链表

#include "pic.h"
/*add_node:增加数据结点@l:要添加到的链表@p:需要添加的数据结点
*/
void add_node(struct Linked *l,struct node *p)
{if(l->first == NULL && l->last == NULL){l->first = p;l->last = p;l->nodeNum++;}else{l->last->next = p;l->last = p;l->nodeNum++;}}/*Create_link:创建链表@l:初始化的链表
*/
struct Linked *Create_link(struct Linked *l)
{l = malloc(sizeof(*l));l->first = NULL;l->last = NULL;l->nodeNum = 0;int i = 1;while(1){struct node *p = malloc(sizeof(*p));sprintf(p->pics,"%d.bmp",i);puts(p->pics);p->next = NULL;add_node(l,p);i++;if(i == 13){break;}}return l;}
/*print_test:打印链表数据@l:打印的链表
*/void print_test(struct Linked *l)
{struct node *p = l->first;while(p){puts(p->pics);p = p->next;}}

显示图片

#include "pic.h"/*show_cril:圆形切换@i:图片的名字@*pic:空数组用来存储完整文件名*/
void show_cril(int i,char *pic)
{sprintf(pic,"%d.bmp",i);puts(pic);show_bmp(0, 0,pic,0);int num = 0;int r = 15;for(int k=0;k<35;k++){for(int m=0;m<480;m++){for(int n=0;n<800;n++){if((m-240)*(m-240)+(n-400)*(n-400)<=r*r*num)lcd_draw_point(n, 479-m, save_color[m][n]);}}num = num+30;}}/*show_left:图片从右向左覆盖@i:图片的名字@*pic:空数组用来存储完整文件名*/void show_left(int i,char *pic)
{sprintf(pic,"%d.bmp",i);puts(pic);show_bmp(0, 0,pic,0);for(int m=799;m>=0;m--){for(int n=479;n>=0;n--){lcd_draw_point(m, 479-n, save_color[n][m]);}usleep(5);}
}/*show_up:图片从上向下覆盖@i:图片的名字@*pic:空数组用来存储完整文件名*/void show_up(int i,char *pic)
{sprintf(pic,"%d.bmp",i);puts(pic);show_bmp(0, 0,pic,0);for(int m=0;m<480;m++){for(int n=0;n<800;n++){lcd_draw_point(n, 479-m, save_color[m][n]);}usleep(5);}}/*show_down:图片从下向上覆盖@i:图片的名字@*pic:空数组用来存储完整文件名*/void show_down(int i,char *pic)
{sprintf(pic,"%d.bmp",i);puts(pic);show_bmp(0, 0,pic,0);for(int m=479;m>=0;m--){for(int n=0;n<800;n++){lcd_draw_point(n, 479-m, save_color[m][n]);}usleep(5);}}/*show_right:图片从左向到覆盖@i:图片的名字@*pic:空数组用来存储完整文件名*/void show_right(int i,char *pic)
{sprintf(pic,"%d.bmp",i);show_bmp(0, 0,pic,0);for(int m=0;m<800;m++){for(int n=0;n<480;n++){lcd_draw_point(m, 479-n, save_color[n][m]);}usleep(5);}
}/*show_bmp:显示图片@x0:初始横坐标@y0:初始纵坐标@*pic:图片文件名@flag:为0保存像素,为1立即显示*/void show_bmp(int x0,int y0,char * pic,int flag)
{int fd = open(pic,O_RDWR);int hight,width;short depth;unsigned char buf[4] = {0};lseek(fd,0x0A,SEEK_SET);read(fd, buf,4);int save = buf[3] <<24 | buf[2] <<16 | buf[1]<<8 |buf[0] <<0;lseek(fd,0x12,SEEK_SET);read(fd, buf,4);width = buf[3] <<24 | buf[2] <<16 | buf[1]<<8 |buf[0] <<0;lseek(fd,0x16,SEEK_SET);read(fd, buf,4);hight = buf[3] <<24 | buf[2] <<16 | buf[1]<<8 |buf[0] <<0;lseek(fd,0x1c,SEEK_SET);read(fd, buf,2);depth = buf[1] <<8 | buf[0];int laizi = 0;if((width/8) % 4 != 0){laizi = 4 - (width/8)%4;}int  real_width = laizi + abs(width);int total_by = real_width *abs(hight) *(depth/8);unsigned char* pixel = malloc(total_by);lseek(fd,54,SEEK_SET);read(fd,pixel,total_by);int m ,n,i = 0;unsigned int a,r,g,b;int color;printf("hight= %d, width = & %d\n",hight,width);for(m = 0;m<abs(hight);m++){for(n=0;n<abs(width);n++){b = pixel[i++];g = pixel[i++];r = pixel[i++];if(depth == 24){a = 0;}else if (depth == 32 ){a = pixel[i++];}color = a<<24 | r <<16 | g<<8 | b;save_color[m][n] = color;if(flag==1){lcd_draw_point( width>0 ?  x0+n : x0+abs(width)-n-1,hight>0? y0+hight-m-1 : y0+m,color);}}i  = i +laizi;usleep(50);}free(pixel);close(fd);
}/*show_bmp_small:显示目录缩略图@x0:初始横坐标@y0:初始纵坐标@*pic:图片文件名*/void show_bmp_small(double x0,double y0,char * pic)
{int fd = open(pic,O_RDWR);int hight,width;short depth;unsigned char buf[4] = {0};lseek(fd,0x0A,SEEK_SET);read(fd, buf,4);int save = buf[3] <<24 | buf[2] <<16 | buf[1]<<8 |buf[0] <<0;lseek(fd,0x12,SEEK_SET);read(fd, buf,4);width = buf[3] <<24 | buf[2] <<16 | buf[1]<<8 |buf[0] <<0;lseek(fd,0x16,SEEK_SET);read(fd, buf,4);hight = buf[3] <<24 | buf[2] <<16 | buf[1]<<8 |buf[0] <<0;lseek(fd,0x1c,SEEK_SET);read(fd, buf,2);depth = buf[1] <<8 | buf[0];int laizi = 0;if((width/8) % 4 != 0){laizi = 4 - (width/8)%4;}int  real_width = laizi + abs(width);int total_by = real_width *abs(hight) *(depth/8);unsigned char* pixel = malloc(total_by);lseek(fd,54,SEEK_SET);read(fd,pixel,total_by);int m ,n,i = 0;unsigned int a,r,g,b;int color;for(m = 0;m<abs(hight);m=m+1){for(n=0;n<abs(width);n=n+1){b = pixel[i++];g = pixel[i++];r = pixel[i++];if(depth == 24){a = 0;}else if (depth == 32 ){a = pixel[i++];}color = a<<24 | r <<16 | g<<8 | b;lcd_draw_point( width>0 ?  (x0+n)/4.0 : (x0+abs(width)-n-1)/4.0,hight>0? (y0+hight-m-1)/3.0 : (y0+m)/3.0,color);}i  = i +laizi;}free(pixel);close(fd);
}/*show_mulu:显示图片@x0:初始横坐标@y0:初始纵坐标@l :保存着图片文件名的链表*/void show_mulu(int x0,int y0,struct Linked *l)
{struct node *p = l->first;int w=0;int h=0;int flag = -1;while(p){show_bmp_small(w*4, h*3, p->pics);w = w + 200;usleep(5);if(w==800){w = 0;h = h +160;}p = p->next;}show_bmp(360, 0, "play.bmp", 1);point p1 = touch();printf("x = %d y = %d\n",p1.x,p1.y);if(p1.x>360&&p1.x<=440&&p1.y>=0&&p1.y<=90){play_pic(l);}if(p1.x>=0&&p1.x<200 && p1.y>=0&&p1.y<=160){flag = 1;}if(p1.x>=200&&p1.x<400&& p1.y>=0&&p1.y<=160){flag = 2;}if(p1.x>=400&&p1.x<600 && p1.y>=0&&p1.y<=160){flag = 3;}if(p1.x>=600&&p1.x<800 && p1.y>=0&&p1.y<=160){flag = 4;}if(p1.x>=0&&p1.x<200 && p1.y>=160&&p1.y<=320){flag = 5;}if(p1.x>=200&&p1.x<400&& p1.y>=160&&p1.y<=320){flag = 6;}if(p1.x>=400&&p1.x<600 && p1.y>=160&&p1.y<=320){flag = 7;}if(p1.x>=600&&p1.x<800 && p1.y>=160&&p1.y<=320){flag = 8;}if(p1.x>=0&&p1.x<200 && p1.y>=320&&p1.y<=480){flag = 9;}if(p1.x>=200&&p1.x<400&& p1.y>=320&&p1.y<=480){flag = 10;}if(p1.x>=400&&p1.x<600 &&  p1.y>=320&&p1.y<=480){flag = 11;}if(p1.x>=600&&p1.x<800 &&  p1.y>=320&&p1.y<=480){flag = 12;}char pic[32] = {0};sprintf(pic,"%d.bmp",flag);show_bmp(0,0,pic,1);show_bmp(0,0,"100.bmp",1);control();}

触屏判断

#include "pic.h"/*touch:获得点击事件@retval:点击的坐标*/point touch()
{point p;p.x = -1;p.y = -1;int fd = open("/dev/input/event0",O_RDWR);if(fd == 0){perror("open error\n");return p;}struct  input_event ev;int ret;while(1){ret = read(fd,&ev,sizeof(ev));if(ret != sizeof(ev)){close(fd);perror("read error");return p;}//判断触摸事件，并获取X值if(ev.type == EV_ABS && ev.code == ABS_X){if(p.x < 0){p.x = ev.value*(800.0/1024);//EV_ABS默认1024，600}}if(ev.type == EV_ABS && ev.code == ABS_Y){if(p.y < 0){p.y = ev.value*(480.0/600);}}if(p.x>=0&&p.y>=0){close(fd);return p;}}
}/*touch_bool:判断是否点击*/int touch_bool()
{point p;p.x = -1;p.y = -1;int fd = open("/dev/input/event0",O_RDWR);if(fd == 0){perror("open error");return 0;}struct input_event ev;int ret;int flag = -1;while(1){ret = read(fd,&ev,sizeof(ev));if(ret != sizeof(ev)){close(fd);perror("read error");return 0;}if(ev.type == EV_ABS && ev.code == ABS_X){return 1;}if(ev.type == EV_ABS && ev.code == ABS_Y);{return 1;}if(p.x>=0 && p.y>=0){return 0;}}}

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基于GEC6818开发板的相册

一，实现的功能

二，代码实现

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