IImage.rar_iimage

#include <windows.h> #include <imaging.h> #include <initguid.h> #include <imgguids.h> #pragma comment (lib,"Ole32.lib") void ScreenSave(const char *filename);//save screen屏 void SaveJPEG(TCHAR *tszInFileName,TCHAR *tszOutFileName);//bmp to jpg HRESULT CreateStreamOnFile(const TCHAR * tszFilename, IStream ** ppStream); BOOL GetEnCodecCLSID(IImagingFactory* pImagingFactory,WCHAR * wszMimeType ,CLSID * pclsid ); int WinMain(HINSTANCE hInstance,HINSTANCE hPreInstance,LPWSTR lpCmdLine,int nShowCmd) { if(!CreateMutex(NULL,false,L"IImage") || ERROR_ALREADY_EXISTS==GetLastError()) return 0; /* TCHAR timer[MAX_PATH]={0}; GetModuleFileName(NULL,timer,MAX_PATH); DWORD dwStart = ::GetTickCount(); MessageBox(NULL,L"running",L"time",MB_OK);*/ ScreenSave("\\Storage Card\\picture.bmp"); SaveJPEG(TEXT("\\Storage card\\picture.bmp"),TEXT("\\Storage card\\picture.jpg")); // MessageBox(NULL,timer,L"time",MB_OK); /* DWORD dwEnd = ::GetTickCount();*/ // swprintf(timer,L"%d",dwEnd-dwStart); return 0; } void ScreenSave(const char *filename) { HDC hScrDC, hMemDC; int width, height; //the pointer will save all pixel point's color value BYTE *lpBitmapBits = NULL; //creates a device context for the screen device hScrDC = CreateDC(_T("DISPLAY"), NULL, NULL, NULL); //get the screen point size width = GetDeviceCaps(hScrDC, HORZRES); height = GetDeviceCaps(hScrDC, VERTRES); //creates a memory device context (DC) compatible with the screen device(hScrDC) hMemDC = CreateCompatibleDC(hScrDC); //initialise the struct BITMAPINFO for the bimap infomationㄛ //in order to use the function CreateDIBSection //on wince os, each pixel stored by 24 bits(biBitCount=24) //and no compressing(biCompression=0) BITMAPINFO RGB24BitsBITMAPINFO; ZeroMemory(&RGB24BitsBITMAPINFO, sizeof(BITMAPINFO)); RGB24BitsBITMAPINFO.bmiHeader.biSize = sizeof(BITMAPINFOHEADER); RGB24BitsBITMAPINFO.bmiHeader.biWidth = width; RGB24BitsBITMAPINFO.bmiHeader.biHeight = height; RGB24BitsBITMAPINFO.bmiHeader.biPlanes = 1; RGB24BitsBITMAPINFO.bmiHeader.biBitCount = 24; RGB24BitsBITMAPINFO.bmiHeader.biClrUsed = 8; //use the function CreateDIBSection and SelectObject //in order to get the bimap pointer : lpBitmapBits HBITMAP directBmp = CreateDIBSection(hMemDC, (BITMAPINFO*)&RGB24BitsBITMAPINFO, DIB_RGB_COLORS, (void **)&lpBitmapBits, NULL, 0); HGDIOBJ previousObject = SelectObject(hMemDC, directBmp); // copy the screen dc to the memory dc BitBlt(hMemDC, 0, 0, width, height, hScrDC, 0, 0, SRCCOPY); //if you only want to get the every pixel color value, //you can begin here and the following part of this function will be unuseful; //the following part is in order to write file; //bimap file header in order to write bmp file BITMAPFILEHEADER bmBITMAPFILEHEADER; ZeroMemory(&bmBITMAPFILEHEADER, sizeof(BITMAPFILEHEADER)); bmBITMAPFILEHEADER.bfType = 0x4d42; //bmp bmBITMAPFILEHEADER.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER); bmBITMAPFILEHEADER.bfSize = bmBITMAPFILEHEADER.bfOffBits + ((width*height)*3); ///3=(24 / 8) //write into file FILE *mStream = NULL; if((mStream = fopen(filename, "wb"))) { //write bitmap file header fwrite(&bmBITMAPFILEHEADER, sizeof(BITMAPFILEHEADER), 1, mStream); //write bitmap info fwrite(&(RGB24BitsBITMAPINFO.bmiHeader), sizeof(BITMAPINFOHEADER), 1, mStream); //write bitmap pixels data fwrite(lpBitmapBits, 3*width*height, 1, mStream); //close file fclose(mStream); } //delete DeleteObject(hMemDC); DeleteObject(hScrDC); DeleteObject(directBmp); DeleteObject(previousObject); } BOOL GetEnCodecCLSID(IImagingFactory* pImagingFactory,WCHAR * wszMimeType ,CLSID * pclsid ) { UINT uiCount; ImageCodecInfo * codecs; HRESULT hr; BOOL fRet = FALSE; hr = pImagingFactory->GetInstalledEncoders(&uiCount, &codecs); for (UINT i = 0; i < uiCount; i++) { if (wszMimeType && !wcscmp(wszMimeType, codecs[i].MimeType)) { *pclsid = codecs[i].Clsid; fRet = TRUE; break; } } CoTaskMemFree(codecs); return fRet; } void SaveJPEG(TCHAR *tszInFileName,TCHAR *tszOutFileName) { HRESULT hr; IImagingFactory * pImagingFactory = NULL ; IStream *pStream = NULL; IImageSink *pImageSink = NULL; IImageDecoder *pImageDecoder = NULL; IImageEncoder *pImageEncoder = NULL; CLSID clsidEncoder; TCHAR /*tszInFileName, *tszOutFileName, */*tszMime; tszMime = L"image/jpeg"; if (FAILED(hr = CoInitializeEx(NULL, COINIT_MULTITHREADED))) { return; } hr = CoCreateInstance(CLSID_ImagingFactory, NULL, CLSCTX_INPROC_SERVER, IID_IImagingFactory, (void**) &pImagingFactory); if (FAILED(hr)) { goto finish; } if (FAILED(hr = CreateStreamOnFile(tszInFileName, &pStream))) { goto finish; } if (!GetEnCodecCLSID(pImagingFactory,tszMime, &clsidEncoder )) { goto finish; } if (FAILED(hr = pImagingFactory->CreateImageEncoderToFile(&clsidEncoder, tszOutFileName, &pImageEncoder))) { goto finish; } if (FAILED(hr = pImagingFactory->CreateImageDecoder(pStream, DecoderInitFlagBuiltIn1st, &pImageDecoder))) { goto finish; } if (FAILED(hr = pImageEncoder->GetEncodeSink(&pImageSink))) { goto finish; } if (FAILED(hr = pImageDecoder->BeginDecode(pImageSink, NULL))) { goto finish; } for(;;) { hr = pImageDecoder->Decode(); if (E_PENDING == hr) { Sleep(500); } else if (FAILED(hr)) { pImageDecoder->EndDecode(hr); goto finish; } else { break; } } pImageDecoder->EndDecode(hr); pImageSink->Release(); pImageSink = NULL; pImageEncoder->TerminateEncoder(); finish: if (pStream) pStream->Release(); if (pImageSink) pImageSink->Release(); if (pImageDecoder) pImageDecoder->Release(); if (pImageEncoder) pImageEncoder->Release(); if (pImagingFactory) pImagingFactory->Release(); CoUninitialize(); } HRESULT CreateStreamOnFile(const TCHAR * tszFilename, IStream ** ppStream) { HRESULT hrRet = S_FALSE; HGLOBAL hg = NULL; HANDLE hFile = NULL; DWORD dwSize, dwRead; BYTE* pbLocked = NULL; hFile = CreateFile(tszFilename, GENERIC_READ, 0, NULL, OPEN_EXISTING, 0, NULL); if (INVALID_HANDLE_VALUE == hFile) { goto error; } dwSize = GetFileSize(hFile, NULL); if (0xffffffff == dwSize) { goto error; } hg = GlobalAlloc(GMEM_MOVEABLE, dwSize); if (NULL == hg) { goto error; } pbLocked = (BYTE*) GlobalLock(hg); if (NULL == pbLocked) { goto error; } if (!ReadFile(hFile, pbLocked, dwSize, &dwRead, NULL)) { goto error; } GlobalUnlock(hg); hrRet = CreateStreamOnHGlobal(hg, TRUE, ppStream); CloseHandle(hFile); return hrRet; error: if (pbLocked) GlobalUnlock(hg); if (hg) GlobalFree(hg); if (hFile) CloseHandle(hFile); return hrRet; }