Stretchblt copyimage
* libjpeg data structure for storing one row, that is, scanline of an image */ * these are standard libjpeg structures for reading(decompression) */ Is their another way to check the data at a pixel without converting a jpg into an HBITMAP? Maybe some incredibly magical libraries? I have no idea why and googling hasn't revealed any answers.
}stream->Release() causes an access violation. HBITMAP hBB = (HBITMAP)CopyImage(hB,IMAGE_BITMAP,0,0,LR_COPYRETURNORG) MessageBox(NULL,"Load Image 7", "", NULL) MessageBox(NULL,"Load Image 6", "", NULL) MessageBox(NULL,"Load Image 5", "", NULL) Stream->Release() //access violation here? MessageBox(NULL,"Load Image 4", "", NULL) OleLoadPicture(stream,0,false,IID_IPicture,(void**)&pic) MessageBox(NULL,"Load Image 3", "", NULL) MessageBox(NULL,"Load Image 1", "", NULL) May have something to do with how I'm passing jpgData*/
Stretchblt copyimage code#
* TODO (#1#): Fix access violaion in code below. InternetReadFile(hFile, buffer, bytesToRead, &bytesRead) Ĭode: HBITMAP Internet::loadImage(BYTE* jpgData) HFile = InternetOpenUrl(hInternet, gal.c_str(), NULL, 0, 0, 0) īool succeeds = HttpQueryInfo(hFile, HTTP_QUERY_CONTENT_LENGTH | HTTP_QUERY_FLAG_NUMBER, (LPVOID)&sizeBuffer, &length, NULL) Std::string temp = gal + ".overview.jpg" HInternet = InternetOpen( "GINA: Version 0.1", INTERNET_OPEN_TYPE_DIRECT, NULL, 0,0) Header.Code: HBITMAP Internet::getFromInternet(std::string gal) * 256 different colors, each is defined by an bmpRBQuad type */ Header.type = 0x4d42 // magic sequence 'BM' WriteBitmapToFile(void *data, unsigned long size, const char *filename) * adding the correct header and put it all WriteBitmapToFile(pBitmap, FrameSize, "tmp.bmp") Memcpy( pBitmap, CamGetPicture(), FrameSize ) Mvfg_getparam( MVFGPAR_DATAFORMAT, &sFormat, giCurrentGrabberID) īYTE *pBitmap = (BYTE*)malloc(FrameSize) BitBlt( hDC, rcWin.left, rcWin.top, lXSize / lXSizeDiv, lYSize / lYSizeDiv, HDCBits, 0, 0, lXSize / lXSizeDiv, lYSize / lYSizeDiv, SRCCOPY ) StretchBlt( hDC, rcWin.left, rcWin.top, lXSize / lXSizeDiv, lYSize / lYSizeDiv, GaHistogram.y = rect.bottom - (DWORD)( (double) gadwHistogram / fYFactor ) GaHistogram.x = (DWORD)( fXFactor * (double)lX ) hBrush = CreateSolidBrush( 0xffffff ) hBrush = CreateSolidBrush( GetSysColor( COLOR_WINDOW )) SelectObject (hdc, GetStockObject (WHITE_PEN)) LineTo( hdc, lX * fXFactor, rect.bottom-10 ) MoveToEx( hdc, lX * fXFactor, rect.bottom, &Point ) SelectObject (hdc, GetStockObject (BLACK_PEN)) create colortable fot bitmap (grayvalues).įor (i = 0 i dwMax ) ? gadwHistogram : dwMax įYFactor = (double) dwMax / (double) rect.bottom įXFactor = (double) ( rect.right - 100 ) / (double) 0x100 HDCBits = CreateCompatibleDC( ghDCMain )
Z_BITMAPINFO zWinGHeader // bitmapinfo for cerating the DIB Here are the two functions : LPSTR CreateBMP( HWND hAppWnd, int nImageType ) does any body has any idea why, the picture is in black? bmp file, but the bitmap file is black (the image size is 900KB, 640*480).
Stretchblt copyimage windows#
after trying for couple of days I end up with the following 2 functions, which creates a file and windows OS is able to run the. I am working with a framegrabber and need to get the images from computer memory and save them on an image file.