Sanjoy Mahajan wrote:
>>>{\pdfimageresolution=72 \externalfigure[ch01dia1.png]}
>
>>when you set pdfimageresolution there isn't any unit either, the
>>unit is implicit
It is defined to be an integer number of pixels per inch, in the
pdftex manual.
> What about a new pdftex primitive: \pdfimagepixel, which would force
> using a unit. Then the above would be done by \pdfimagepixel=1bp
You can (as always) propose it on the pdftex list, but i personally
do not see the point. Bear in mind that the png spec is extremely
clear on the use pHYs:
If this ancillary chunk is not present, pixels are assumed to be
square, and the physical size of each pixel is unknown.
So the problem was created way before pdftex came into play.
Cheers, Taco
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