#ifndef  _AFXSTD_507A8D18_E3C1_47AA_8892_41786A393718_INCLUDE_H_
#define  _AFXSTD_507A8D18_E3C1_47AA_8892_41786A393718_INCLUDE_H_


#if _MSC_VER > 1200
#pragma once
#endif //!_MSC_VER > 1200


#include <atlimage.h>
#include <string>
using namespace std;


//====================================CImageEx====================================
/// @brief 图像处理类
///
/// 格式: BMP、GIF、JPG、PNG、TIF等
/// 功能: 图像加载、保存
///      图像信息的获取
///      图像数据的获取与修改
///      位图的绑定与获取
///      图像绘制...
//================================================================================
class CImageEx 
{
public:	   
	CImageEx();
	~CImageEx();	

public:	
	//通过文件路径imagePath加载图像,必须带后缀
	HRESULT LoadImage(string &imagePath);

	//指定文件路径imagePath保存图像,必须带后缀
	HRESULT SaveImage(string &imagePath);

	//图像宽度(以像素为单位)
	int GetWidth(); 

	//图像高度(以像素为单位)
	int GetHeight(); 	
	
	//图像数据
	BYTE *GetData();

	//每行的字节数
	//值 > 0  图像方向为从上到下, GetData()获得的指针指向第一行
	//值 < 0  图像方向为从下到上, GetData()获得的指针指向最后一行
	int GetRowBytes();

	//每个像素所占的bit数
	int GetBPP();
   
	//设置位置为x、y的像素的颜色
    <span style="white-space:pre">	</span>void SetPixelColor(int x, int y, int color);
	void SetPixelColor(int x, int y, int r, int g, int b);
		   
	//获取位置为x、y的像素的颜色
    <span style="white-space:pre">	</span>int GetPixelColor(int x, int y); 	

	//获取位置为x、y的像素的颜色内存数据
	void *GetPixelAddress( int x, int y );

	//将一个DIB（或DDB）位图与CImage对象相连接
	void AttachHBitMap(HBITMAP &pHbitMap);

	//返回HBITMAP位图句柄
	HRESULT DetachHBitMap(HBITMAP &pHbitMap); 

	//返回CBitMap
	CBitmap *GetBitmap();  

	//将数据绘制到hWnd的窗体上
	void Draw(HWND hWnd);

	//将数据绘制保存到位图路径imagePath中
	//宽度为 width，长度为 heigth
	void DrawToBitMap(string &imagePath, int width, int heigth);

	//获取CImage
	CImage *GetImagePtr();

private:
	CImage *m_pImage;
};


#endif //!_AFXSTD_507A8D18_E3C1_47AA_8892_41786A393718_INCLUDE_H_

#include "stdafx.h"
#include <windows.h>
#include "Image.h"

CImageEx::CImageEx()
{
	m_pImage      = NULL;
}

CImageEx::~CImageEx()
{
	if (NULL != m_pImage)
	{
		m_pImage->Destroy();	
	}
}

HRESULT CImageEx::LoadImage( string &imagePath )
{
	if (NULL != m_pImage && !m_pImage->IsNull())
	{
		m_pImage->Destroy();
	}
	if (NULL == m_pImage)
	{
		m_pImage = new CImage;
	}

	return( m_pImage->Load((CString)imagePath.c_str()) );		
}


CImage * CImageEx::GetImagePtr()
{
	return(m_pImage);
}

HRESULT CImageEx::DetachHBitMap( HBITMAP &pHbitMap )
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return(E_POINTER);
	}

	pHbitMap = m_pImage->Detach();
	return(S_OK);
}

CBitmap * CImageEx::GetBitmap()
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return(NULL);
	}

	return(CBitmap::FromHandle(m_pImage->Detach()));
}

BYTE * CImageEx::GetData()
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return(NULL);
	}

	return ( (BYTE *)m_pImage->GetBits() );
}

int CImageEx::GetRowBytes()
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return(0);
	}

	return ( m_pImage->GetPitch() );
}

int CImageEx::GetBPP()
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return(0);
	}

	return ( m_pImage->GetBPP() );
}

int CImageEx::GetWidth()
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return(0);
	}

	return ( m_pImage->GetWidth() );
}

int CImageEx::GetHeight()
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return(0);
	}

	return ( m_pImage->GetHeight() );
}

HRESULT CImageEx::SaveImage( string &imagePath )
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return(0);
	}

	return ( m_pImage->Save((CString)imagePath.c_str()) );
}

void CImageEx::AttachHBitMap( HBITMAP &pHbitMap )
{
	if (NULL != m_pImage && !m_pImage->IsNull())
	{
		m_pImage->Destroy();
	}
	if (NULL == m_pImage)
	{
		m_pImage = new CImage;
	}

	m_pImage->Attach(pHbitMap);
}

void CImageEx::SetPixelColor( int x, int y, int color )
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return;
	}

	m_pImage->SetPixel(x, y, (COLORREF)(color));
}

void CImageEx::SetPixelColor( int x, int y, int r, int g, int b )
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return;
	}

	m_pImage->SetPixelRGB(x, y, r, g, b);
}

int CImageEx::GetPixelColor( int x, int y )
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return(0);
	}

	return(m_pImage->GetPixel(x, y));
}

void *CImageEx::GetPixelAddress( int x, int y )
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return(NULL);
	}

	return(m_pImage->GetPixelAddress(x, y));
}

void CImageEx::Draw( HWND hWnd )
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return;
	}

	RECT  rect;
	HDC   hDC =  GetDC(hWnd);
	::GetClientRect(hWnd, &rect);
	m_pImage->Draw(hDC, rect);

	//窗体重绘事件使用BeginPaint与EndPaint
}

void CImageEx::DrawToBitMap(string &imagePath, int width, int heigth)
{
	if (NULL == m_pImage || m_pImage->IsNull())
	{
		return;
	}
		
	HDC hDC   = m_pImage->GetDC();
	CDC	*pCDC = CDC::FromHandle(hDC);

	//创建位图
	CBitmap *pBitMap = new CBitmap;
	pBitMap->DeleteObject();
	pBitMap->CreateCompatibleBitmap(pCDC, width, heigth);

	//创建绘制DC,绑定pBitMap
	CDC memDC;
	memDC.CreateCompatibleDC(pCDC);
	CBitmap *pOldBitMap =  memDC.SelectObject(pBitMap);

	//将图像绘制到pBitMap中
	::SetStretchBltMode(memDC.m_hDC, HALFTONE);  
	::SetBrushOrgEx(memDC.m_hDC, 0, 0, NULL); 
	m_pImage->StretchBlt(memDC.m_hDC, 0, 0, width, heigth, 0, 0, m_pImage->GetWidth(), m_pImage->GetHeight(), SRCCOPY);
	HBITMAP hBitMap = (HBITMAP)memDC.SelectObject(pOldBitMap->m_hObject); //位图资源
	
	//保存到目的路径
	CImage  imageDes;
	imageDes.Attach(hBitMap);
	imageDes.Save((CString)imagePath.c_str());

	memDC.DeleteDC();	
	if (NULL != pBitMap)
	{
		pBitMap->DeleteObject();
		delete pBitMap;
	}

	m_pImage->ReleaseDC();
}

CImageEx imageEx;
imageEx.LoadImage(string("C:\\Tulip.jpg"));
imageEx.DrawToBitMap(string("C:\\Tulip2.jpg"), 200, 100);