X11 截图与鼠标事件

X11 截图

/***************************************************************************

Written by WuXiao 2010.05.23
Compile this code using:
gcc -o output main.c -lX11 -ljpeg

***************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>

#include <X11/Xlib.h>

#include <jpeglib.h>



/***************************************************************
Write XImage data to a JPEG file

Must include <jpeglib.h>
Return value:
0 - failed
1 - success
****************************************************************/
static char err_str[256];
int JpegWriteFileFromImage(char *filename, XImage* img)
{
FILE* fp;
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;

fp = fopen(filename,"wb");
if(fp==NULL)
{
memset(err_str, 0, sizeof(err_str));
sprintf(err_str,"cannot write file %s",filename);
printf("JpegWriteFileFromImage %s",err_str);
return 0;
}



fwrite(img->data,1,img->width*img->height*img->bits_per_pixel/8,fp);

printf("img.width=%d,img.height=%d,img.bits_per_pixel=%d depth=%d\n",img->width,img->height,img->bits_per_pixel,img->depth);

cinfo.err = jpeg_std_error(&jerr);
jpeg_create_compress(&cinfo);

jpeg_stdio_dest(&cinfo,fp);
cinfo.image_width = img->width;
cinfo.image_height = img->height;
cinfo.input_components = 3;
cinfo.in_color_space = JCS_RGB;

jpeg_set_defaults(&cinfo);
jpeg_start_compress(&cinfo,TRUE);

JSAMPROW row_pointer[1];
unsigned char* pBuf = (unsigned char*)malloc(3*img->width);
row_pointer[0] = pBuf;
printf("img.width=%d,img.height=%d,img.bits_per_pixel=%d depth=%d\n",img->width,img->height,img->bits_per_pixel,img->depth);
int i=0;
while(cinfo.next_scanline < cinfo.image_height)
{
//printf("cinfo.next_scanline=%d ",cinfo.next_scanline);
int j=0;
for(i=0;i<img->width;i++)
{
//memcpy(pBuf+j,img->data+cinfo.next_scanline*img->bytes_per_line+i*4,3);
*(pBuf+j) = *(img->data+cinfo.next_scanline*img->bytes_per_line+i*4+2);
*(pBuf+j+1) = *(img->data+cinfo.next_scanline*img->bytes_per_line+i*4+1);
*(pBuf+j+2) = *(img->data+cinfo.next_scanline*img->bytes_per_line+i*4);
j+=3;
}
jpeg_write_scanlines(&cinfo,row_pointer,1);
}

free(pBuf);
jpeg_finish_compress(&cinfo);
jpeg_destroy_compress(&cinfo);

fclose(fp);
return 1;
}

/*****************************************************************
Capture a local screenshot of the desktop,
saving to the file specified by filename.
If type = 0, then write a bitmap file, else
write a JPEG file.

Return Value:
0 - fail
1 - success
******************************************************************/
int CaptureDesktop(char* filename, int type)
{
Window desktop;
Display* dsp;
XImage* img;

int screen_width;
int screen_height;
  struct timeval tv;
  long long L1,L2,L3;
  int tv1=0,tv2=0;
dsp = XOpenDisplay(NULL);/* Connect to a local display */
if(NULL==dsp)
{
//sprintf(err_str,"Error:Cannot connect to local display\n");
printf("CaptureDesktop","Cannot connect to local display");
return 0;
}
desktop = RootWindow(dsp,0);/* Refer to the root window */
if(0==desktop)
{
//printf("cannot get root window\n");
printf("CaptureDesktop","cannot get root window");
return 0;
}

/* Retrive the width and the height of the screen */
screen_width = DisplayWidth(dsp,0);
screen_height = DisplayHeight(dsp,0);
printf("%d %d\n",screen_width,screen_height);
/* Get the Image of the root window */
 gettimeofday(&tv,NULL);
                L1=tv.tv_sec*1000*1000+tv.tv_usec;

img = XGetImage(dsp,desktop,0,0,screen_width,screen_height,~0,ZPixmap);
if(type==0){
printf("type=%d\n",type);
}
//BmpWriteFileFromImage(filename,img);
else
JpegWriteFileFromImage(filename,img);

gettimeofday(&tv,NULL);
                L2=tv.tv_sec*1000*1000+tv.tv_usec;
                tv1=(L2-L1);
                printf("cap time=%d\n",tv1);

XDestroyImage(img);
XCloseDisplay(dsp);
return 1;
}

main()
{
//CaptureDesktop("./screenshot.bmp",0);
CaptureDesktop("./screenshot.jpg",1);
printf("Done.\n");
}

鼠标事件：

/* ref: http://www.ishiboo.com/~danny/Projects/xwarppointer/ */
#include <stdio.h>
#include <string.h>
//头文件
#include <unistd.h>
#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
//全局变量
Display *display;
Window root;
//初始化
void init()
{
    if ((display = XOpenDisplay(NULL)) == NULL) {
    fprintf(stderr, "Cannot open local X-display.\n");
    return;
    }
    root = DefaultRootWindow(display);
}
void GetCursorPos(int *x,int *y)
{
int tmp;unsigned int tmp2;
Window fromroot, tmpwin;
XQueryPointer(display, root, &fromroot, &tmpwin, x, y, &tmp, &tmp, &tmp2);
}
//设置坐标
void SetCursorPos(int x,int y)
{
int tmp;
XWarpPointer(display, None, root, 0, 0, 0, 0, x, y);
XFlush(display);
}
//模拟点击
/* http://www.linuxquestions.org/questions/programming-9/simulating-a-mouse-click-594576/ */
void mouseClick(int button)
{
Display *display = XOpenDisplay(NULL);

XEvent event;

if(display == NULL)
{
printf("Errore nell'apertura del Display !!!\n");
return;
}

memset(&event, 0x00, sizeof(event));

event.type = ButtonPress;
event.xbutton.button = button;
event.xbutton.same_screen = True;

XQueryPointer(display, RootWindow(display, DefaultScreen(display)), &event.xbutton.root, &event.xbutton.window, &event.xbutton.x_root, &event.xbutton.y_root, &event.xbutton.x, &event.xbutton.y, &event.xbutton.state);

event.xbutton.subwindow = event.xbutton.window;

while(event.xbutton.subwindow)
{
event.xbutton.window = event.xbutton.subwindow;

XQueryPointer(display, event.xbutton.window, &event.xbutton.root, &event.xbutton.subwindow, &event.xbutton.x_root, &event.xbutton.y_root, &event.xbutton.x, &event.xbutton.y, &event.xbutton.state);
}

if(XSendEvent(display, PointerWindow, True, 0xfff, &event) == 0) printf("Errore nell'invio dell'evento !!!\n");

XFlush(display);


sleep(1);

event.type = ButtonRelease;
event.xbutton.state = 0x100;

if(XSendEvent(display, PointerWindow, True, 0xfff, &event) == 0) printf("Errore nell'invio dell'evento !!!\n");

XFlush(display);

XCloseDisplay(display);
}
int main()
{
//init();
//int x,y;
//GetCursorPos(&x,&y);
//printf("%d %d\n",x,y);
//SetCursorPos(500,522);
//XCloseDisplay(display);
//mouseClick(Button1);
//sleep(5);
mouseClick(Button3);


return 0;
}