Re: [pygame] Resizing a sprite at runtime

[Casey Duncan <casey@xxxxxxxxxxx>]

On Jun 22, 2007, at 10:34 AM, Michael Sullivan wrote:

> If I have an image loaded into a variable, is there a way I can  
> display
> the image larger than it actually is in the file?  I have a sprite
> that's 80x40.  The other sprites on the screen are 64x64, and the  
> first
> sprite looks tiny compared to the others, so I wanted to make it  
> appear
> bigger than 80x40.  Can anyone help me out?

I assume you want to keep the same aspect ratio, and do smooth (non  
jaggy) scaling. Here's an example function that scales an input image  
to fit in a square of a given size.

def resize(surface, size):
    scale = size / float(max(surface.get_rect().size))
    return pygame.transform.rotozoom(surface, 0, scale)

Note using rotozoom will "upsample" the input surface to 32bpp  
regardless of the input surface bitsize.

hth,

-Casey