//-----------pnglib.h#include "stdafx.h"#include "afxdialogex.h"#include "atlimage.h"class DrawImage{public:	DrawImage(UINT, LPCTSTR);	DrawImage(HWND, UINT, LPCTSTR);	~DrawImage();public:	void Draw(int, int, int, int);	void Destroy();	BOOL LoadPNG(UINT, LPCTSTR);	BOOL LoadPNG(HWND, UINT, LPCTSTR);	int GetWidth();	int GetHeight();private:	BOOL Load_Resource(CImage *, UINT, LPCTSTR);	CImage img;	HDC hDC;	HWND hWnd;};

 

//----------------pnglib.cpp#include "stdafx.h"#include "pnglib.h"DrawImage::DrawImage(UINT nResID, LPCTSTR lpTyp){	LoadPNG(nResID, lpTyp);}DrawImage::DrawImage(HWND hWndin, UINT nResID, LPCTSTR lpTyp){	LoadPNG(hWndin, nResID, lpTyp);}DrawImage::~DrawImage(){	Destroy();}int DrawImage::GetWidth(){	return img.GetWidth();}int DrawImage::GetHeight(){	return img.GetHeight();}void DrawImage::Draw(int xDest, int yDest, int WidthDest, int HeightDest){	img.Draw(hDC, xDest, yDest, WidthDest, HeightDest);}void DrawImage::Destroy(){	img.Destroy();	ReleaseDC(hWnd, hDC);}BOOL DrawImage::LoadPNG(UINT nResID, LPCTSTR lpTyp){	hDC = ::GetDC(hWnd);	return Load_Resource(&img, nResID, lpTyp);}BOOL DrawImage::LoadPNG(HWND hWndin, UINT nResID, LPCTSTR lpTyp){	hWnd = hWndin;	hDC = ::GetDC(hWnd);	return Load_Resource(&img, nResID, lpTyp);}BOOL DrawImage::Load_Resource(CImage *pImage, UINT nResID, LPCTSTR lpTyp){	if (pImage == NULL)	{		return false;	}	pImage->Destroy();	HRSRC hRsrc = ::FindResource(AfxGetResourceHandle(), MAKEINTRESOURCE(nResID), lpTyp);	if (hRsrc == NULL)return false;	HGLOBAL hImgData = ::LoadResource(AfxGetResourceHandle(), hRsrc);	if (hImgData == NULL)	{		::FreeResource(hImgData);		return false;	}	LPVOID lpVoid = ::LockResource(hImgData);	LPSTREAM pStream = NULL;	DWORD dwSize = ::SizeofResource(AfxGetResourceHandle(), hRsrc);	HGLOBAL hNew = ::GlobalAlloc(GHND, dwSize);	LPBYTE lpByte = (LPBYTE)::GlobalLock(hNew);	::memcpy(lpByte, lpVoid, dwSize);	::GlobalUnlock(hNew);	HRESULT ht = ::CreateStreamOnHGlobal(hNew, TRUE, &pStream);	if (ht != S_OK)	{		GlobalFree(hNew);	}	else	{		pImage->Load(pStream);		GlobalFree(hNew);	}	::FreeResource(hImgData);	for (int i = 0; i < img.GetWidth(); i++)	{		for (int j = 0; j < img.GetHeight(); j++)		{			unsigned char* puc = reinterpret_cast
     
      (img.GetPixelAddress(i, j));			puc[0] = puc[0] * puc[3] / 255;			puc[1] = puc[1] * puc[3] / 255;			puc[2] = puc[2] * puc[3] / 255;		}	}	if (img.IsNull())	{		return false;	}	return true;}
     

 用法：

把你的PNG添加到工程里面，修改资源ID为   PIC_PNG1用法1：默认在当前窗口中绘图DrawImage m_png(PIC_PNG1,"png");m_png.Draw(100,100,m_png.GetWidth(),m_png.GetHeight());//其中两个100是图片左上角的坐标用法2：可以在任何窗口中绘图HWND hWndin = 桌面句柄；//在桌面绘图，需要自己去获取DrawImage m_png(hWndin，PIC_PNG1,"png");m_png.Draw(100,100,m_png.GetWidth(),m_png.GetHeight());

 

作者：天楼桦