nicht angemeldet
Hallo !
Wenn du Michaels guten Rat, dir deinen eigenen Browser zu schreiben, umzusetzen gedenkst, vergiss bitte nicht die Vorgaben des W3C bezüglich der Umsetzung der Maßangabe "Pixel" peinlichst genau zu beachten:
Wenn ich 'mal zitieren darf: *fg*
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Pixel units are relative to the resolution of the viewing device, i.e., most often a computer display. If the pixel density of the output device is very different from that of a typical computer display, the user agent should rescale pixel values. It is recommended that the reference pixel be the visual angle of one pixel on a device with a pixel density of 90dpi and a distance from the reader of an arm's length. For a nominal arm's length of 28 inches, the visual angle is therefore about 0.0227 degrees.
For reading at arm's length, 1px thus corresponds to about 0.28 mm (1/90 inch). When printed on a laser printer, meant for reading at a little less than arm's length (55 cm, 21 inches), 1px is about 0.21 mm. On a 300 dots-per-inch (dpi) printer, that may be rounded up to 3 dots (0.25 mm); on a 600 dpi printer, it can be rounded to 5 dots.
The two images below illustrate the effect of viewing distance on the size of a pixel and the effect of a device's resolution. In the first image, a reading distance of 71 cm (28 inch) results in a px of 0.28 mm, while a reading distance of 3.5 m (12 feet) requires a px of 1.4 mm.
<img src="http://www.w3.org/TR/CSS2/images/pixel1.gif" border=0 alt="">
In the second image, an area of 1px by 1px is covered by a single dot in a low-resolution device (a computer screen), while the same area is covered by 16 dots in a higher resolution device (such as a 400 dpi laser printer).
<img src="http://www.w3.org/TR/CSS2/images/pixel2.gif" border=0 alt="">
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So und nicht anders ist "px" definiert.
Viel Spaß beim Programmieren! ;-)
SCNR
Gruß,
kerki