|Dec 14, 2012, 10:48 PM||#26|
I don't understand your second example.
But I think you may have misunderstood what I was saying... I'm not saying we should de-rasterize existing graphics - we should just make SVGs a more widely supported format and use them extensively going forward.
As far as how to have a PNG fallback for browsers without SVG support:
Last edited by ArtOfWarfare; Dec 14, 2012 at 10:53 PM.
|Dec 20, 2012, 02:53 PM||#27|
Digital images don't have a dpi or ppi, because they are digital. When you print a digital image on paper, then they have dpi. When you display them on a screen, they are displayed at the ppi of the screen.
For example, take an image that is 300x300.
On an iPhone (retina) the image would be displayed at 326ppi. The image would display at 0.92 inches by 0.92 inches.
On an average computer screen, the image would be displayed at 72ppi. The image would be 4.17 inches by 4.17 inches.
So if your eyesight is good enough, you can make out the same level of detail on both screens even though the image is much smaller on an iPhone. You will be more likely to zoom in on an image on an iphone because it is so small, and it will look worse if you zoom it to the point where the image is displayed at 4 x 4 inches. If that is what your client is worried about, then you just need to provide an image with a resolution that is higher in the first place. This is independent of ppi. A good image might be 640 pixels wide so that is uses the entire width of the screen.
Regardless, the conversation should be about how big the client wants the images to display, not the ppi. Once you know the size they want, then you can figure the resolution out pretty easy.
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