这期内容当中小编将会给大家带来有关利用c++怎么封装一个截图服务，文章内容丰富且以专业的角度为大家分析和叙述，阅读完这篇文章希望大家可以有所收获。
在鄂城等地区，都构建了全面的区域性战略布局，加强发展的系统性、市场前瞻性、产品创新能力，以专注、极致的服务理念，为客户提供
做网站、网站建设 网站设计制作
定制网站开发,公司网站建设,企业网站建设,
成都品牌网站建设,
网络营销推广,
外贸网站制作,鄂城网站建设费用合理。
首先是抓图服务：
ICaptureHelper.h
#pragma once
#include
#include
using std::string;
class ICaptureHelper
{
public:
virtual ~ICaptureHelper() {}
virtual bool Init(const string& windowName) = 0;
virtual bool Init(HWND hwnd) = 0;
virtual void Cleanup() = 0;
virtual bool RefreshWindow() = 0;
virtual bool ChangeWindowHandle(const string& windowName) = 0;
virtual bool ChangeWindowHandle(HWND hwnd) = 0;
virtual bool Capture() = 0;
virtual const RECT& GetWindowRect() const = 0;
virtual const RECT& GetClientRect() const = 0;
virtual int GetBitmapDataSize() const = 0;
virtual HBITMAP GetBitmap() const = 0;
virtual void* GetBitmapAddress() const = 0;
};
CaptureService.h
#pragma once
#include "ICaptureHelper.h"
#include
其次是抓图代码封装：
AbsCaptureHelper.h
#pragma once
#include "ICaptureHelper.h"
class AbsCaptureHelper : public ICaptureHelper
{
public:
AbsCaptureHelper();
virtual ~AbsCaptureHelper();
bool Init(const string& windowName) override;
bool Init(HWND hwnd) override;
void Cleanup() override;
bool RefreshWindow() override;
bool ChangeWindowHandle(const string& windowName) override;
bool ChangeWindowHandle(HWND hwnd) override;
bool Capture() override;
const RECT& GetWindowRect() const override { return windowRect_; }
const RECT& GetClientRect() const override { return clientRect_; }
int GetBitmapDataSize() const override { return bmpDataSize_; }
HBITMAP GetBitmap() const override { return bitmap_; }
void* GetBitmapAddress() const override { return bitsPtr_; }
protected:
virtual bool InitDC(const BITMAPINFO& bitmapInfo) = 0;
virtual bool DoCapture() = 0;
protected:
HWND hwnd_;
HDC scrDc_;
HDC memDc_;
HBITMAP bitmap_;
HBITMAP oldBitmap_;
void* bitsPtr_;
RECT windowRect_;
RECT clientRect_;
int bmpDataSize_;
};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();
}
bool AbsCaptureHelper::Init(const string& windowName)
{
const auto handle = ::FindWindowA(nullptr, windowName.c_str());
if (handle == nullptr)
{
return false;
}
return Init(handle);
}
bool AbsCaptureHelper::Init(HWND hwnd)
{
hwnd_ = hwnd;
//获取窗口大小
if (!::GetWindowRect(hwnd_, &windowRect_) || !::GetClientRect(hwnd_, &clientRect_))
{
return false;
}
const auto clientRectWidth = clientRect_.right - clientRect_.left;
const auto clientRectHeight = clientRect_.bottom - clientRect_.top;
bmpDataSize_ = clientRectWidth * clientRectHeight * 4;
//位图信息
BITMAPINFO bitmapInfo;
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;
return InitDC(bitmapInfo);
}
void AbsCaptureHelper::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;
}
bool AbsCaptureHelper::RefreshWindow()
{
const auto hwnd = hwnd_;
Cleanup();
return Init(hwnd);
}
bool AbsCaptureHelper::ChangeWindowHandle(const string& windowName)
{
Cleanup();
return Init(windowName);
}
bool AbsCaptureHelper::ChangeWindowHandle(HWND hwnd)
{
Cleanup();
return Init(hwnd);
}
bool AbsCaptureHelper::Capture()
{
if (bitmap_ == nullptr || memDc_ == nullptr || scrDc_ == nullptr)
{
return false;
}
return DoCapture();
}DibCaptureHelper.h
#pragma once
#include "AbsCaptureHelper.h"
class DibCaptureHelper : public AbsCaptureHelper
{
public:
DibCaptureHelper();
virtual ~DibCaptureHelper();
protected:
bool InitDC(const BITMAPINFO& bitmapInfo) override;
bool DoCapture() override;
private:
bool saveBitmap_;
int mockPageNumber;
int bmpCount_;
};DibCaptureHelper.cpp
#include "stdafx.h"
#include "DibCaptureHelper.h"
#include
static int BmpCount = 0;
static int BmpMaxCount = 50;
DibCaptureHelper::DibCaptureHelper()
: saveBitmap_(false)
, mockPageNumber(++BmpCount)
, bmpCount_(0)
{
}
DibCaptureHelper::~DibCaptureHelper()
{
}
bool DibCaptureHelper::InitDC(const BITMAPINFO& 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_);
return false;
}
oldBitmap_ = static_cast(::SelectObject(memDc_, bitmap_));
return true;
}
bool DibCaptureHelper::DoCapture()
{
const auto clientRectWidth = clientRect_.right - clientRect_.left;
const auto clientRectHeight = clientRect_.bottom - clientRect_.top;
const auto ret = ::BitBlt(
memDc_, 0, 0, clientRectWidth, clientRectHeight,
scrDc_, 0, 0, SRCCOPY);
return ret != 0;
}
PrintCaptureHelper.h
#pragma once
#include "AbsCaptureHelper.h"
class PrintCaptureHelper : public AbsCaptureHelper
{
public:
PrintCaptureHelper();
virtual ~PrintCaptureHelper();
protected:
bool InitDC(const BITMAPINFO& bitmapInfo) override;
bool DoCapture() override;
};PrintCaptureHelper.cpp
#include "stdafx.h"
#include "PrintCaptureHelper.h"
PrintCaptureHelper::PrintCaptureHelper()
{
}
PrintCaptureHelper::~PrintCaptureHelper()
{
}
bool PrintCaptureHelper::InitDC(const BITMAPINFO& 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_);
return false;
}
oldBitmap_ = static_cast(::SelectObject(memDc_, bitmap_));
return true;
}
bool PrintCaptureHelper::DoCapture()
{
const auto ret = ::PrintWindow(hwnd_, memDc_, PW_CLIENTONLY | PW_RENDERFULLCONTENT);
return ret != 0;
}上述就是小编为大家分享的利用c++怎么封装一个截图服务了，如果刚好有类似的疑惑，不妨参照上述分析进行理解。如果想知道更多相关知识，欢迎关注创新互联行业资讯频道。
网站题目：利用c++怎么封装一个截图服务-创新互联
分享链接：
http://cdkjz.cn/article/johci.html
