how to disable auto zooming

[pete111]

command: /home/pi/pngview/pngview/pngview /home/pi/image.png
I found out pngview zoom my image (no idea why, because image has the same dimensions as screen, both 720x576). I am using the same image as wallpaper. But when I open image.png in pngview, it is bigger.

How can I disable this auto zoom?

[AndrewFromMelbourne]

There is no where in the code that zooms the image.

One possible confusion is that this code does not use the framebuffer, it uses the DispmanX interface on the Raspberry Pi.

The framebuffer may be distorted (zoomed).

So if you are seeing a difference in displayed size between an image displayed on the framebuffer and an image using the pngview code, I would suspect that the framebuffer is distorted.