I recently installed a Debian Jessie desktop and when opening PNG/BMP images it all becomes blurred on zoom (in or out). With the image at 100%, everything looks sharp as expected.
This happens both on Image Viewer and Iceweasel.
When opening the same images on my Macbook, everything is OK.
Does anyone know how can I change this behavior?
I think it has nothing to do with the images, but with the software used to view them - both formats (PNG/BMP) are raster graphics:
In computer graphics, a raster graphics image, or bitmap, is a dot matrix data structure representing a generally rectangular grid of pixels, or points of color, viewable via a monitor, paper, or other display medium. Raster images are stored in image files with varying formats. ~Wikipedia
Therefore, there will be a loss in quality when zooming in and out. I think that you are not experiencing the same in your Macbook as it may be using some algorithm to prevent this loss in quality to happen, although it should have a limit as well.
When enlarged, individual pixels appear as squares. Zooming in further, they can be analyzed, with their colors constructed by adding the values for red, green and blue. ~Wikipedia
Are you sure that those images in your Debian system are the exact same ones as in your Macbook? Maybe you have PNG/BMP in the first one, and SVG in the latter.
