JPEG from resource with GDI+

I am trying to show a jpeg image from a resource with GDI+.

I've made a JPEG resource called IDR_JPEG1 in VC++ 7.1 with the type "JPEG".

I've used this code:

Code:

// Graphics declaration above...
LPSTREAM stream; 
HGLOBAL imageMem = LoadResource(GetModuleHandle(0), FindResource(GetModuleHandle(0), MAKEINTRESOURCE(IDR_JPEG1), "JPEG"));
CreateStreamOnHGlobal(imageMem, false, &stream);

Image image(stream);
graphics.DrawImage(&image, 0, 0, 50, 50);

It compiles but no image is shown.
But when i do

Code:

Image image(L"res/generals.jpg");
graphics.DrawImage(&image, 0, 0, 50, 50);

the image is shown...

What is wrong ?

I don't know what class Image is, but obviously it has a constructor that takes a filename (string) but no constructor that takes an LPSTREAM (prolly an implicit conversion takes place). Successful compilation does not mean invincibility, you should check for error messages.

typedef IStream *LPSTREAM;
Image::Image(IStream*,BOOL);

I' having roughly the same problem. I investigated some further and noticed that DrawImage returns status 3 (OutOfMemory), but this is not the case.

Mazdak, did you check the last error code after doing: "Image image(stream);" to see whether the stream was correctly loaded?

Anyone some ideas?

As stated in the documentation LoadResource does not return an actual HGLOBAL. Therefore, its return value can not be used with CreateStreamOnHGlobal.

See CodeProject: Loading JPG & PNG resources using GDI+ for sample code.