Image Loading

if(SDL_Init(SDL_INIT_VIDEO) < 0){	cerr << "error L init SDL [" << SDL_GetError() << "]\n";	exit(-1);}SDL_Surface *screen = SDL_SetVideoMode(800,600,16,SDL_HWSURFACE);if(!screen){	cerr << "error : SDL_SetVideoMode("		<< w << "," << h << "," << bpp << ",SDL_SWSURFACE)\t"		<< SDL_GetError() << "\n";	exit(-1);}/*here we create a tmp surface, convertit, and free the tmp*/SDL_Surface *tmp = IMG_Load("myimage.jpg");if(!tmp)	// error checking{	cerr << "error : LoadImage(" << src << ")\t"		<< SDL_GetError() << "\n";}SDL_Surface *img = SDL_DisplayFormat(tmp);SDL_FreeSurface(tmp);SDL_Rect dest;	// create destination rectangledest.x = 10;dest.y = 100;SDL_BlitSurface(img , NULL , screen , &dest);

#include <gdiplus.h>using namespace Gdiplus;#pragma comment (lib,"gdiplus.lib")//==========================================================================//// Stream implementation                                                    ////==========================================================================//class CStream : public IStream{public:	CStream(const BYTE* pBuffer, size_t nLen) : m_pBuffer(pBuffer), m_nLen(nLen), m_nPos(0) {}	// IUnknown //	virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void __RPC_FAR *__RPC_FAR *ppvObject) {return E_FAIL;}	virtual ULONG STDMETHODCALLTYPE AddRef() {return 1;}	virtual ULONG STDMETHODCALLTYPE Release() {return 1;}	// ISequentialStream //	virtual HRESULT STDMETHODCALLTYPE Read(void *pv, ULONG cb, ULONG *pcbRead)	{		if(cb > m_nLen-m_nPos)		{			memcpy(pv,m_pBuffer+m_nPos,m_nLen-m_nPos);			if(pcbRead) *pcbRead = m_nLen-m_nPos;			m_nPos = m_nLen;			return S_OK;		}		else		{			memcpy(pv,m_pBuffer+m_nPos,cb);			if(pcbRead) *pcbRead = cb;			m_nPos += cb;			return S_OK;		}	}	virtual HRESULT STDMETHODCALLTYPE Write(const void *pv, ULONG cb, ULONG *pcbWritten) {return E_FAIL;}	// IStream //	virtual HRESULT STDMETHODCALLTYPE SetSize(ULARGE_INTEGER libNewSize) {return E_FAIL;}	virtual HRESULT STDMETHODCALLTYPE CopyTo(IStream *pstm, ULARGE_INTEGER cb, ULARGE_INTEGER *pcbRead, ULARGE_INTEGER *pcbWritten) {return E_FAIL;}	virtual HRESULT STDMETHODCALLTYPE Commit(DWORD grfCommitFlags) {return E_FAIL;}	virtual HRESULT STDMETHODCALLTYPE Revert() {return E_FAIL;}	virtual HRESULT STDMETHODCALLTYPE LockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType) {return E_FAIL;}	virtual HRESULT STDMETHODCALLTYPE UnlockRegion(ULARGE_INTEGER libOffset, ULARGE_INTEGER cb, DWORD dwLockType) {return E_FAIL;}	virtual HRESULT STDMETHODCALLTYPE Clone(IStream **ppstm) {return E_FAIL;}	virtual HRESULT STDMETHODCALLTYPE Stat(STATSTG *pInfo, DWORD grfStatFlag)	{		HRESULT hResult;		memset(pInfo,0,sizeof(STATSTG));		if((grfStatFlag & STATFLAG_NONAME) == 0)		{			IMalloc* pMalloc;			hResult = CoGetMalloc(1,&pMalloc);			if(FAILED(hResult)) return hResult;			pInfo->pwcsName = (LPOLESTR)pMalloc->Alloc(4);			pMalloc->Release();			if(!pInfo->pwcsName) return E_OUTOFMEMORY;			memcpy(pInfo->pwcsName,L"?",4);		}		pInfo->type = STGTY_STREAM;		pInfo->cbSize.QuadPart = m_nLen;		return S_OK;	}	virtual HRESULT STDMETHODCALLTYPE Seek(LARGE_INTEGER dlibMove, DWORD dwOrigin, ULARGE_INTEGER *plibNewPosition)	{		switch(dwOrigin)		{		case STREAM_SEEK_SET: m_nPos = (size_t)dlibMove.QuadPart; break;		case STREAM_SEEK_CUR: m_nPos = (size_t)(((int)m_nPos)+dlibMove.QuadPart); break;		case STREAM_SEEK_END: m_nPos = (size_t)(((int)m_nLen)+dlibMove.QuadPart); break;		}		if(plibNewPosition)			plibNewPosition->QuadPart = m_nPos;		return S_OK;	}private:	const BYTE*	m_pBuffer;	size_t		m_nLen;	size_t		m_nPos;};BYTE* LoadImageInMemory(const BYTE* pData, DWORD dwLen, DWORD& rWidth, DWORD& rHeight, DWORD dwMaxX, DWORD dwMaxY){BYTE* pRet;	// Init GDI+	GdiplusStartupInput gdiplusStartupInput;	ULONG_PTR gdiplusToken;	if(GdiplusStartup(&gdiplusToken,&gdiplusStartupInput,NULL) != Ok)		return NULL;	// Load from our stream //	{	CStream theStream(pData,dwLen);	Bitmap theImage(&theStream);	if(theImage.GetLastStatus() != Ok)	{		GdiplusShutdown(gdiplusToken);		return NULL;	}	// Allocate memory for return //	rWidth = min(theImage.GetWidth(),dwMaxX);	rHeight = min(theImage.GetHeight(),dwMaxY);	pRet = new BYTE[rWidth*rHeight*4];	if(!pRet)	{		GdiplusShutdown(gdiplusToken);		return NULL;	}	Rect rc(0,0,rWidth,rHeight);	BitmapData theLock;	theLock.Width = rWidth;	theLock.Height = rHeight;	theLock.Stride = theLock.Width*4;	theLock.Scan0 = pRet;	if(theImage.LockBits(&rc,ImageLockModeRead|ImageLockModeUserInputBuf,PixelFormat32bppRGB,&theLock) != Ok)	{		delete[] pRet;		GdiplusShutdown(gdiplusToken);		return NULL;	}	theImage.UnlockBits(&theLock);	}	// Cleanup and return //	GdiplusShutdown(gdiplusToken);	return pRet;}

#include "Corona.h"int main() {  corona::Image *pImage =    corona::OpenImage("my.jpg", corona::PF_R8G8B8A8);  // pImage->getWidth() gives you the image's width  // pImage->getHeight() gives you the image's height  // pImage->getPixels() returns a pointer to the image's pixels  delete pImage;}