Drawimage

[john5632]

LoadImage is returning NULL? and nothing is getting drawn.

[john5632]

Thanks its working...but what I need to change in code If I load a png/jpg image...

[Anu_Bala]

Check bmp file is avaialble in folder.Otherwise it returns NULL.

Anu

[Chris Meech]

You've not shown the code that actually draws the image, but I'll take a guess at the problem. In your first code snippet, it is a CBitmap instance that will be used for drawing. In your second snippet, it is a pointer to a Bitmap instance that is used. Your drawing code will need to be adjusted accordingly. :)

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[enhzflep]

I use this code

// BMP, GIF, JPEG, PNG, TIFF, Exif, WMF, and EMF
HBITMAP mLoadImg(WCHAR *szFilename)
{
HBITMAP result=NULL;

Gdiplus::Bitmap\* bitmap = new Gdiplus::Bitmap(szFilename,false);
bitmap->GetHBITMAP(NULL, &result);
delete bitmap;
return result;

}

Note: You have to startup and shutdown the GDI+ system. I usually do this in apps initialization and destruction (winmain or main if not mfc apps)

int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
Gdiplus::GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR gdiplusToken;
Gdiplus::GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

hInst = hInstance;
InitCommonControls();
// The user interface is a modal dialog box
DialogBox(hInstance, MAKEINTRESOURCE(DLG\_MAIN), NULL, (DLGPROC)DialogProc);
Gdiplus::GdiplusShutdown(gdiplusToken);

}

[john5632]

:), basically my motive is to draw image (png/jpg) using bitblt...I will adjust code accordingly.

[Anu_Bala]

See this link.It may help you. http://stackoverflow.com/questions/2490661/how-to-load-png-jpeg-images-using-mfc[^]

Anu

[john5632]

Thank you for help...I am able to draw image. I need your help in one more problem as described below: I need to draw image on the screen using XOR so that diff of 2 images can be draw as a complete image. How to solve this?

[wangafei]

first you can get the path,then set ID and path link！ so，your first method can do it

[ThatsAlok]

MFC by default support only BMP file, however you can take services of different library that suits your need, one of them is gdiplus, search Google for more information

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