Manage screen resolution in MFC C++

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Hello, i'm developing a game in VC++ 6.0 with MFC. My screen resolution is 1280x1024 pixels, so i have a background bitmap with this size. The problem is when i change the resolution to be smaller, some parts of the pictures are not seen. I'm using BitBlt() function to display the bitmap.
I need to make it in that way:
If my screen resolution is 1280x1024 - the pic resolution to be that size
If my screen resolution is 1024x768 - the pic resolution to be that size
..........................................................................

Any ideas what i can do? Thanks in advance.

Posted 17-Jan-10 4:30am

George Findulov

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Graham Breach · Answer 1 · 2010-01-17T04:55:00

Solution 1

You could use StretchBlt() instead of BitBlt(), though it might not look very good. Use SetStretchBltMode() to change how the pixels are mapped from the source to the destination.

Posted 17-Jan-10 4:55am

Graham Breach

CPallini · Answer 2 · 2010-01-17T09:47:00

Solution 2

You may use my DLL (see the article Plain C Resampling DLL) to resize the bitmap without loosing much quality (another option could be GDI+).
:)

Posted 17-Jan-10 9:47am

CPallini