基于SDL实现图片的移动和风车的转动

所需准备的东西如下：

1.本程序所需的库支持

其中调用了SDL SDL_image SDL_gfx tslib 等库

包含有的文件有SDL的头文件，交叉编译的可执行文件a 、一些链接库文件

libSDL-1.2.so.0.11.3 、libSDL-1.2.so.0、libSDL.so、---------------〉 SDL的一些链接库

libSDL_gfx.so、libSDL_gfx.so.13、libSDL_gfx.so.13.9.0、libSDL_gfx.so.13.9.1、 ----------〉SDL_gfx 的一些链接库

libSDL_image-1.2.so.0、libSDL_image-1.2.so.0.8.0、libSDL_image.so、 ---------------〉 SDL_image的一些链接库

libts-0.0.so.0、libts-0.0.so.0.1.1、libts.so、 ---------------〉触摸屏的一些链接库

2.本程序所需的图片

背景图片：bg.bmp 移动图片：player.bmp

3.本程序所需的代码及头文件

main.c ts.c ts.h tslib.h move.h movebutton.h judge.h

代码如下：

1.-------------------------main.c

#include "SDL.h"
#include "stdio.h"
#include"judge.h"
#include"movebutton.h"
#include<stdlib.h>


static void sig(int argv) {
exit(0);


}


int main() {
//声明和初始化
SDL_Surface * screen;
SDL_Surface * image;
SDL_Surface * PlayerImage;
XTsEvent event;


Uint32 BeginTicks;
//声明要传输的精灵图片的区域部分
SDL_Rect PRect, BRect; //PRect对应精灵的移动的小图位置（实现动画），BRect对应精灵在屏幕的位置。
unsigned char PlayerStarts = 0;
unsigned char PlayerIndex = 0;


int flag=1;


//初始化SDL
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) == -1) {
fprintf(stderr, "初始化SDL %s\n", SDL_GetError());
return -1;
}
TsInit();
signal(SIGINT, sig);


//初始化成功设置退出要调用的函数SDL_Quit
atexit(SDL_Quit);


screen = SDL_SetVideoMode(640, 480, 16, SDL_SWSURFACE);
if (screen == NULL) {
fprintf(stderr, "不能设置 640x480x8 video mode %s\n",SDL_GetError());
return -1;
}


SDL_WM_SetCaption("图片移动", NULL);
//读取背景图片信息，
image = SDL_LoadBMP("./bg.bmp");


if (image == NULL) {
fprintf(stderr, "不能下载图片, %s\n", SDL_GetError());
return -1;
}


//读取picture
PlayerImage = SDL_LoadBMP("./picture.bmp"); //请在终端里运行该程序
if (PlayerImage == NULL) {
fprintf(stderr, "不能下载图片, %s\n", SDL_GetError());
return -1;
}


//读取第一个像素
Uint8 key = *((Uint8 *)PlayerImage->pixels);
//设置色键
SDL_SetColorKey(PlayerImage, SDL_SRCCOLORKEY, key);


if (SDL_BlitSurface(image, NULL, screen, NULL) < 0) {
//解释一下NULL，第一个是按照image的尺寸显示，第二个是默认显示 
fprintf(stderr, "BlitSurface error: %s\n", SDL_GetError());
return -1;
}


PRect.x = 0; //初始化动画显示的图片。
PRect.y = 0;
PRect.w = 32;
PRect.h = 48;


BRect.x = 220; //初始化精灵的位置。
BRect.y = 200;
BRect.w = 32;
BRect.h = 48;


if (SDL_BlitSurface(PlayerImage, &PRect, screen, &BRect) < 0) {
fprintf(stderr, "BlitSurface error: %s\n", SDL_GetError());
return -1;
}


//更新显示图片
SDL_UpdateRect(screen, 0, 0, image->w, image->h);


BeginTicks = SDL_GetTicks();
//  真的时候监听板子上的触摸事件
while (1) {


//消息循环


TsEvent(&event);
//if (TsEvent(&event)) 
// {


switch (event.type) {
case TSDOWN:
movebutton(screen);
SDL_UpdateRect(screen, 0, 0, 0, 0);
break;


case TSUP:
movebutton(screen);
SDL_UpdateRect(screen, 0, 0, 0, 0);
break;


}
judge(screen, &event, 0, &BeginTicks, &BRect, PRect, &PlayerIndex,
&PlayerStarts);
// }


if (SDL_BlitSurface(image, NULL, screen, NULL) < 0) {
//NULL，第一个是按照image的尺寸显示，第二个是默认显示
fprintf(stderr, "BlitSurface error: %s\n", SDL_GetError());
return -1;
}


if (SDL_BlitSurface(PlayerImage, &PRect, screen, &BRect) < 0) {
fprintf(stderr, "BlitSurface error: %s\n", SDL_GetError());
return -1;
}


movebutton(screen);
}
//退出了程序释放图片资源
//SDL_FreeSurface(image);
// SDL_FreeSurface(PlayerImage);
return 0;


}

2-----------------------ts.c

#include"ts.h"


struct tsdev *ts;


int  TsInit()
{
char *tsdevice=NULL;

if( (tsdevice = getenv("TSLIB_TSDEVICE")) != NULL ) {
                ts = ts_open(tsdevice,0);
        }else {
        ts = ts_open("/dev/input/event0", 0);
      }
        
      if (!ts) {
perror("ts_open");
return -1;
}
 
if (ts_config(ts)) {
perror("ts_config");
exit(1);
}

return 0;
}


int TsEvent(XTsEvent *event)
{
//当按下时候记录坐标
static int x1=-1;
static int y1=-1;
int ret;
struct ts_sample samp;

while(1){

ret = ts_read(ts, &samp, 1);
if (ret < 0) {

perror("ts_read");
event->type=-1;
return -1;
}

if(samp.pressure == 1)
{

if(x1 ==-1 || y1 ==-1)
{
x1=samp.x;
y1=samp.y;

event->x=samp.x;
event->y=samp.y;
event->type=TSDOWN;
return 1;

}

if(samp.x == x1 && samp.y == y1)
{
continue ;

}

event->x=samp.x;
event->y=samp.y;
event->type=TSMOTION;

return 1;
}

if(samp.pressure == 0) {

x1=-1;
y1=-1;

event->x=samp.x;
event->y=samp.y;
event->type=TSUP;

return 1;
}

event->type=-1;
return -1;
}

}


void Tsclose()
{
ts_close(ts);
}

----------------------3. ts.h

#ifndef __TS_TEST_H
#define __TS_TEST_H


#include "tslib.h"
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>


//type
typedef enum{ TSDOWN=0,TSUP,TSMOTION} TSEVENT;


typedef struct
{
TSEVENT type;
int x;
int y;

}XTsEvent;


int  TsInit();
int  TsEvent(XTsEvent *event);
void Tsclose();


#endif
----------------------4   tslib.h

#ifndef _TSLIB_H_
#define _TSLIB_H_
/*
 *  tslib/src/tslib.h
 *
 *  Copyright (C) 2001 Russell King.
 *
 * This file is placed under the LGPL.
 *
 * $Id: tslib.h,v 1.4 2005/02/26 01:47:23 kergoth Exp $
 *
 * Touch screen library interface definitions.
 */
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#include <stdarg.h>
#include <sys/time.h>


#ifdef WIN32
  #define TSIMPORT __declspec(dllimport)
  #define TSEXPORT __declspec(dllexport)
  #define TSLOCAL
#else
  #define TSIMPORT
  #ifdef GCC_HASCLASSVISIBILITY
    #define TSEXPORT __attribute__ ((visibility("default")))
    #define TSLOCAL __attribute__ ((visibility("hidden")))
  #else
    #define TSEXPORT
    #define TSLOCAL
  #endif
#endif


#ifdef TSLIB_INTERNAL
  #define TSAPI TSEXPORT
#else
  #define TSAPI TSIMPORT
#endif // TSLIB_INTERNAL


struct tsdev;


struct ts_sample {
int x;
int y;
unsigned int pressure;
struct timevaltv;
};


/*
 * Close the touchscreen device, free all resources.
 */
TSAPI int ts_close(struct tsdev *);


/*
 * Configure the touchscreen device.
 */
TSAPI int ts_config(struct tsdev *);


/*
 * Change this hook to point to your custom error handling function.
 */
extern TSAPI int (*ts_error_fn)(const char *fmt, va_list ap);


/*
 * Returns the file descriptor in use for the touchscreen device.
 */
TSAPI int ts_fd(struct tsdev *);


/*
 * Load a filter/scaling module
 */
TSAPI int ts_load_module(struct tsdev *, const char *mod, const char *params);


/*
 * Open the touchscreen device.
 */
TSAPI struct tsdev *ts_open(const char *dev_name, int nonblock);


/*
 * Return a scaled touchscreen sample.
 */
TSAPI int ts_read(struct tsdev *, struct ts_sample *, int);


/*
 * Returns a raw, unscaled sample from the touchscreen.
 */
TSAPI int ts_read_raw(struct tsdev *, struct ts_sample *, int);


#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _TSLIB_H_ */

----------------------5 move.h

#ifndef _MOVE_H_
#define _MOVE_H_ 
#include "SDL.h"


//




int move(SDL_Surface *screen,int i,Uint32 *BeginTicks,SDL_Rect *BRect,SDL_Rect PRect,unsigned char *PlayerIndex )
  { 
    Uint32  EndTicks;
   EndTicks = SDL_GetTicks();


if ((EndTicks - *BeginTicks) > 50) {//到了50MS
*BeginTicks = EndTicks;
SDL_FillRect(screen, BRect, 0); //清除以前的图片。


if (i) {
switch (i) {
case 1: //向上移动。
if (((*BRect).y - 5) > 0) { //要移动的位置是否到顶
(*BRect).y -= 5;//坐标减去5
}
else {
(*BRect).y = 0; //设置位置在顶部。
}
PRect.x = (*PlayerIndex)* 32; //使用序号计算该显示那个动画图片
PRect.y = 144; //向上的图组
(*PlayerIndex)++; //动画序号加1
if ((*PlayerIndex) > 2) (*PlayerIndex) = 0; //循环显示动画
                                       
break;
case 2:

if (((*BRect).y + (*BRect).h + 5) < screen->h) {
(*BRect).y += 5;
}
else {
(*BRect).y = screen->h - (*BRect).h;
}
PRect.x = (*PlayerIndex) * 32;
PRect.y = 0;
(*PlayerIndex)++;
if ((*PlayerIndex) > 2) (*PlayerIndex) = 0;//循环显示动画
break;
case 3:
if (((*BRect).x - 5) > 0) {
(*BRect).x -= 5;
}
else {
(*BRect).x = 0;
}
PRect.x = (*PlayerIndex) * 32;
PRect.y = 48;
(*PlayerIndex)++;
if ((*PlayerIndex) > 2) (*PlayerIndex) = 0;
break;
case 4:
if (((*BRect).x + (*BRect).w + 5) < screen->w) {
(*BRect).x += 5;
}
else {
(*BRect).x = screen->w - (*BRect).w;
}
PRect.x = (*PlayerIndex)* 32;
PRect.y = 96;
(*PlayerIndex) ++;
if ((*PlayerIndex) > 2) (*PlayerIndex) = 0;
break;


}
}
                 }
}
#endif

----------------------6 movebutton.h

#ifndef _MOVEBUTTON_H_
#define _MOVEBUTTON_H_
int movebutton(SDL_Surface *screen) {


         filledTrigonColor(screen, 510, 280, 550,280,530, 250, 0xff8f66);
filledTrigonColor(screen, 510,400, 550,400,530, 430, 0xff8f66);
filledTrigonColor(screen, 470, 320, 470,360,440, 340, 0xff8f66);
filledTrigonColor(screen, 590, 320, 590,360,620, 340, 0xff8f66);
    filledCircleColor (screen, 530, 340, 40, 0xff8f66);
              stringColor(screen, 520, 340, "Quit", 0xFFFFFFFF);
    
              boxColor(screen, 490, 180,600, 220,0xff8f66);
              stringColor(screen, 500, 200, " draw Trigon", 0xFFFFFFFF);
SDL_Flip(screen);
return 0;
}
#endif
//临时
----------------------7    judge.h

#ifndef _JUDGE_H_
#define _JUDGE_H_
#include"move.h"
#include"ts.h"


int judge(SDL_Surface *screen, XTsEvent * event,unsigned char i,Uint32 *BeginTicks,SDL_Rect *BRect,SDL_Rect PRect,unsigned char  * PlayerIndex,unsigned char *PlayerStarts) {
// 向上移动图片
if ((*event).x<=550&&(*event).x>=510)
if ((*event).y>=250 && (*event).y<=280)
if ((*event).type==TSDOWN||(*event).type==TSUP) {
                         move(screen,1,BeginTicks,BRect,PRect,PlayerIndex);
                            *PlayerStarts = 1;//向上移动。
*PlayerIndex  = 0;//动画序号清零
}
// 向下移动图片
if ((*event).x<=550 && (*event).x>=510)
if ((*event).y>=400 && (*event).y<=430)
if ((*event).type==TSDOWN||(*event).type==TSUP) {
move(screen,2,BeginTicks,BRect,PRect,PlayerIndex);
                              *PlayerStarts = 2; //向下移动。
    *PlayerIndex  = 0;//动画序号清零
}


// 向左移动图片
if ((*event).x<=470 && (*event).x>=440)
if ((*event).y>=320 && (*event).y<=360)
if ((*event).type==TSDOWN||(*event).type==TSUP) {
move(screen,3,BeginTicks,BRect,PRect,PlayerIndex);
                              *PlayerStarts = 3; //向左移动
    *PlayerIndex  = 0;//动画序号清零
}


// 退出
if ((*event).x<=620 && (*event).x>=590)
if ((*event).y>=320 && (*event).y<=360)
if ((*event).type==TSDOWN||(*event).type==TSUP) {
move(screen,4,BeginTicks,BRect,PRect,PlayerIndex);
                              *PlayerStarts = 4; //向右移动
             *PlayerIndex  = 0;//动画序号清零
}


if ((*event).x<=570 && (*event).x>=490)
if ((*event).y>=300 && (*event).y<=380)
if ((*event).type==TSDOWN||(*event).type==TSUP) {
     SDL_Quit();

}


// 画风车
if ((*event).x<=600 && (*event).x>=490)
if ((*event).y>=180 && (*event).y<=220)
if ((*event).type==TSDOWN||(*event).type==TSUP)
 {
filledTrigonColor(screen, 300, 200, 300,240,340, 240,0xff0623);
                             SDL_UpdateRect(screen, 0, 0,0,0);
                                  SDL_Delay(500);
                           filledTrigonColor(screen, 300, 280, 340,280,340, 240,0xfbff89);
                             SDL_UpdateRect(screen, 0, 0,0,0);
                                  SDL_Delay(500);
      filledTrigonColor(screen, 380, 280, 380,240,340, 240,0x741dff);
SDL_UpdateRect(screen, 0, 0,0,0);
                                  SDL_Delay(500);
                            filledTrigonColor(screen, 380, 200, 340,200,340, 240,0x5bff20);
SDL_UpdateRect(screen, 0, 0,0,0);
                                  SDL_Delay(1000);


filledTrigonColor(screen, 320, 220, 340,220,340, 240,0x66b120);
SDL_UpdateRect(screen, 0, 0,0,0);
 SDL_Delay(1000);
filledTrigonColor(screen, 320, 240, 320,260,340, 240,0xb12ab1);
SDL_UpdateRect(screen, 0, 0,0,0);
 SDL_Delay(1000);
filledTrigonColor(screen, 340, 260, 360,260,340, 240,0x16b133);
SDL_UpdateRect(screen, 0, 0,0,0);
 SDL_Delay(1000);


                            filledTrigonColor(screen, 360, 240, 360,220,340, 240,0xff8f66);
SDL_UpdateRect(screen, 0, 0,0,0);
 SDL_Delay(1000);


} 
return 0;
}
#endif

四、本程序所需的命令

1、配置需要的库的命令

1. SDL-1.2.14
cd SDL-1.2.14

./configure --prefix=/opt/arm --disable-video-nanox -disable-video-qtopia --disable-static --enable-shared --disable-video-photon --disable-video-ggi --disable-video-svga --disable-video-aalib --disable-video-dummy --disable-video-dga --disable-arts --disable-esd --disable-alsa --disable-video-x11 --disable-nasm --disable-joystick --disable-input-tslib -enable-video-fbcon --host=arm-linux

make&&make install

2. SDL_image-1.2.10

cd SDL_image-1.2.10

./configure --prefix=/opt/arm --host=arm-linux --disable-static --enable-shared --with-sdl-prefix=/opt/arm CPPFLAGS=-I/opt/arm/include/SDL LDFLAGS=-L/opt/arm/lib

make&&make install

3. SDL_gfx-2.0.22

cd SDL_gfx-2.0.22

./configure --prefix=/opt/arm --disable-static --enable-shared --with-sdl-prefix=/opt/arm CPPFLAGS=-I/opt/arm/include/SDL LDFLAGS=-L/opt/arm/lib --host=arm-linux --enable-mmx=no

make&&make install