c++ 封装一个截图服务

2023-07-07 02:05:03 295

首先是抓图服务：

ICaptureHelper.h

#pragmaonce

#include
#include
usingstd::string;

classICaptureHelper
{
public:
virtual~ICaptureHelper(){}
virtualboolInit(conststring&windowName)=0;
virtualboolInit(HWNDhwnd)=0;
virtualvoidCleanup()=0;
virtualboolRefreshWindow()=0;
virtualboolChangeWindowHandle(conststring&windowName)=0;
virtualboolChangeWindowHandle(HWNDhwnd)=0;
virtualboolCapture()=0;

virtualconstRECT&GetWindowRect()const=0;
virtualconstRECT&GetClientRect()const=0;
virtualintGetBitmapDataSize()const=0;
virtualHBITMAPGetBitmap()const=0;
virtualvoid*GetBitmapAddress()const=0;
};

CaptureService.h

#pragmaonce

#include"ICaptureHelper.h"
#include
usingstd::map;

classCaptureService
{
public:
CaptureService()=default;
staticCaptureService&GetInstance();

enumCaptureType
{
//使用CreateDIBSection抓图，速度快，但是无法抓取D3D等渲染的窗口
CreateDibSection=0,

//使用PrintWindow抓图，速度慢(16ms左右)，但是可以抓取D3D等渲染的窗口
PrintWindow
};

boolRegisterCapture(stringname,stringwindowName,CaptureTypetype=CreateDibSection);//注册抓图服务
boolRegisterCapture(stringname,HWNDhwnd,CaptureTypetype=CreateDibSection);//注册抓图服务
voidUnRegisterCapture(stringname);//注销抓图服务
boolIsRegister(stringname);//获取是否已注册抓图服务

boolRefreshWindow(stringname);//刷新窗口
boolChangeWindowHandle(stringname,stringwindowName);//修改窗口句柄
boolChangeWindowHandle(stringname,HWNDhwnd);//修改窗口句柄
boolCapture(stringname);//抓图

boolGetWindowRect(stringname,RECT&winRect);//获取窗口尺寸
boolGetClientRect(stringname,RECT&clientRect);//获取窗口客户区尺寸
boolGetBitmapDataSize(stringname,int&bmpDataSize);//获取抓图数据大小
boolGetBitmap(stringname,HBITMAP&bitmap);//获取窗口位图
boolGetBitmapAddress(stringname,void**bitsPtr);//获取窗口位图地址

voidCleanup();//清理所有抓图服务

private:
~CaptureService();

private:
mapcaptureHelpers_;
};

其次是抓图代码封装：

AbsCaptureHelper.h

#pragmaonce

#include"ICaptureHelper.h"

classAbsCaptureHelper:publicICaptureHelper
{
public:
AbsCaptureHelper();
virtual~AbsCaptureHelper();

boolInit(conststring&windowName)override;
boolInit(HWNDhwnd)override;
voidCleanup()override;
boolRefreshWindow()override;
boolChangeWindowHandle(conststring&windowName)override;
boolChangeWindowHandle(HWNDhwnd)override;
boolCapture()override;

constRECT&GetWindowRect()constoverride{returnwindowRect_;}
constRECT&GetClientRect()constoverride{returnclientRect_;}
intGetBitmapDataSize()constoverride{returnbmpDataSize_;}
HBITMAPGetBitmap()constoverride{returnbitmap_;}
void*GetBitmapAddress()constoverride{returnbitsPtr_;}

protected:
virtualboolInitDC(constBITMAPINFO&bitmapInfo)=0;
virtualboolDoCapture()=0;

protected:
HWNDhwnd_;
HDCscrDc_;
HDCmemDc_;
HBITMAPbitmap_;
HBITMAPoldBitmap_;
void*bitsPtr_;

RECTwindowRect_;
RECTclientRect_;
intbmpDataSize_;
};

AbsCaptureHelper.cpp

#include"stdafx.h"
#include"AbsCaptureHelper.h"


AbsCaptureHelper::AbsCaptureHelper()
:hwnd_(nullptr)
,scrDc_(nullptr)
,memDc_(nullptr)
,bitmap_(nullptr)
,oldBitmap_(nullptr)
,bitsPtr_(nullptr)
,windowRect_{0,0,0,0}
,clientRect_{0,0,0,0}
,bmpDataSize_(0)
{
}

AbsCaptureHelper::~AbsCaptureHelper()
{
AbsCaptureHelper::Cleanup();
}

boolAbsCaptureHelper::Init(conststring&windowName)
{
constautohandle=::FindWindowA(nullptr,windowName.c_str());
if(handle==nullptr)
{
returnfalse;
}

returnInit(handle);
}

boolAbsCaptureHelper::Init(HWNDhwnd)
{
hwnd_=hwnd;

//获取窗口大小
if(!::GetWindowRect(hwnd_,&windowRect_)||!::GetClientRect(hwnd_,&clientRect_))
{
returnfalse;
}

constautoclientRectWidth=clientRect_.right-clientRect_.left;
constautoclientRectHeight=clientRect_.bottom-clientRect_.top;
bmpDataSize_=clientRectWidth*clientRectHeight*4;

//位图信息
BITMAPINFObitmapInfo;
bitmapInfo.bmiHeader.biSize=sizeof(bitmapInfo);
bitmapInfo.bmiHeader.biWidth=clientRectWidth;
bitmapInfo.bmiHeader.biHeight=clientRectHeight;
bitmapInfo.bmiHeader.biPlanes=1;
bitmapInfo.bmiHeader.biBitCount=32;
bitmapInfo.bmiHeader.biSizeImage=clientRectWidth*clientRectHeight;
bitmapInfo.bmiHeader.biCompression=BI_RGB;

returnInitDC(bitmapInfo);
}

voidAbsCaptureHelper::Cleanup()
{
if(bitmap_==nullptr)
{
return;
}

//删除用过的对象
::SelectObject(memDc_,oldBitmap_);
::DeleteObject(bitmap_);
::DeleteDC(memDc_);
::ReleaseDC(hwnd_,scrDc_);

hwnd_=nullptr;
scrDc_=nullptr;
memDc_=nullptr;
bitmap_=nullptr;
oldBitmap_=nullptr;
bitsPtr_=nullptr;
}

boolAbsCaptureHelper::RefreshWindow()
{
constautohwnd=hwnd_;
Cleanup();
returnInit(hwnd);
}

boolAbsCaptureHelper::ChangeWindowHandle(conststring&windowName)
{
Cleanup();
returnInit(windowName);
}

boolAbsCaptureHelper::ChangeWindowHandle(HWNDhwnd)
{
Cleanup();
returnInit(hwnd);
}

boolAbsCaptureHelper::Capture()
{
if(bitmap_==nullptr||memDc_==nullptr||scrDc_==nullptr)
{
returnfalse;
}

returnDoCapture();
}

DibCaptureHelper.h

#pragmaonce

#include"AbsCaptureHelper.h"

classDibCaptureHelper:publicAbsCaptureHelper
{
public:
DibCaptureHelper();
virtual~DibCaptureHelper();

protected:
boolInitDC(constBITMAPINFO&bitmapInfo)override;
boolDoCapture()override;

private:
boolsaveBitmap_;
intmockPageNumber;
intbmpCount_;
};

DibCaptureHelper.cpp

#include"stdafx.h"
#include"DibCaptureHelper.h"
#include

staticintBmpCount=0;
staticintBmpMaxCount=50;

DibCaptureHelper::DibCaptureHelper()
:saveBitmap_(false)
,mockPageNumber(++BmpCount)
,bmpCount_(0)
{
}

DibCaptureHelper::~DibCaptureHelper()
{
}

boolDibCaptureHelper::InitDC(constBITMAPINFO&bitmapInfo)
{
scrDc_=::GetWindowDC(hwnd_);
memDc_=::CreateCompatibleDC(scrDc_);

bitmap_=::CreateDIBSection(memDc_,&bitmapInfo,DIB_RGB_COLORS,&bitsPtr_,nullptr,0);
if(bitmap_==nullptr)
{
::DeleteDC(memDc_);
::ReleaseDC(hwnd_,scrDc_);
returnfalse;
}

oldBitmap_=static_cast(::SelectObject(memDc_,bitmap_));
returntrue;
}

boolDibCaptureHelper::DoCapture()
{
constautoclientRectWidth=clientRect_.right-clientRect_.left;
constautoclientRectHeight=clientRect_.bottom-clientRect_.top;

constautoret=::BitBlt(
memDc_,0,0,clientRectWidth,clientRectHeight,
scrDc_,0,0,SRCCOPY);

returnret!=0;
}

PrintCaptureHelper.h

#pragmaonce

#include"AbsCaptureHelper.h"

classPrintCaptureHelper:publicAbsCaptureHelper
{
public:
PrintCaptureHelper();
virtual~PrintCaptureHelper();

protected:
boolInitDC(constBITMAPINFO&bitmapInfo)override;
boolDoCapture()override;
};

PrintCaptureHelper.cpp

#include"stdafx.h"
#include"PrintCaptureHelper.h"


PrintCaptureHelper::PrintCaptureHelper()
{
}

PrintCaptureHelper::~PrintCaptureHelper()
{
}

boolPrintCaptureHelper::InitDC(constBITMAPINFO&bitmapInfo)
{
scrDc_=::GetWindowDC(hwnd_);
memDc_=::CreateCompatibleDC(scrDc_);

bitmap_=::CreateDIBSection(scrDc_,&bitmapInfo,DIB_RGB_COLORS,&bitsPtr_,nullptr,0);
if(bitmap_==nullptr)
{
::DeleteDC(memDc_);
::ReleaseDC(hwnd_,scrDc_);
returnfalse;
}

oldBitmap_=static_cast(::SelectObject(memDc_,bitmap_));
returntrue;
}

boolPrintCaptureHelper::DoCapture()
{
constautoret=::PrintWindow(hwnd_,memDc_,PW_CLIENTONLY|PW_RENDERFULLCONTENT);
returnret!=0;
}

以上就是c++封装一个截图服务的详细内容，更多关于c++截图的资料请关注毛票票其它相关文章！

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