On Tue, Feb 19, 2019 at 10:48:38AM +0100, Bahr Rudolf wrote:
Hi All,
from an external figure I normally know its width and height in px. But I don't know its exact sizes in pt. When newsizing the figure in a document (by the same width-to-height-ratio), I'll do that as some part of textwidth or textheight, in pt or mm, but not in px, i.e. by means of [width=<some pt>]. Sometimes it would be interesting to know its new height in pt, and viceversa.
Is there a variable or something else containing its new size in pt?
Regards, Rudolf
Hi All, up to now Nobody answered to my question, perhaps it might have been too simple. Indeed One could normally assume: picture-width-in-px preset-picture-width-in-pt -------------------- = -------------------------- picture-height-in-px asked-picture-height-in-pt And according to Adam Riese One gets: preset-picture-width-in-pt * picture-height-in-px asked-picture-height-in-pt = --------------------------------------------------- picture-width-in-px ----------------- The picture sizes in px One gets by invoking for instance graphics Magick's identify in a lua program: local file = assert ( io.popen ( 'gm identify ' .. picture_name, 'r' )) local output = file:read ( '*all' ) file:close () local words = {} for w in string.gmatch ( output, "%g+" ) do words [ #words + 1 ] = w end -- Width and height are found in words[3]: i.e. 5407x3544+0+0 local dims = {} for d in string.gmatch ( words [ 3 ], "%d+" ) do dims [ #dims + 1 ] = d end local px_width = dims [ 1 ] local px_height = dims [ 2 ] ----------------- It's a solution at least as long as your Lua supports "io.popen". There might be shorter solutions. Cheers, Rudolf