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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/context/sources/general/manuals/workflows/workflows-graphics.tex | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/doc/context/sources/general/manuals/workflows/workflows-graphics.tex b/doc/context/sources/general/manuals/workflows/workflows-graphics.tex index 549b8b9f2..25eed7bee 100644 --- a/doc/context/sources/general/manuals/workflows/workflows-graphics.tex +++ b/doc/context/sources/general/manuals/workflows/workflows-graphics.tex @@ -83,6 +83,53 @@ and suitable action can be taken. \stopsection +\startsection[title=Downsampling] + +You can plug in you rown converter, here is an example: + +\starttyping +\startluacode + +figures.converters.jpg = figures.converters.jpg or { } + +figures.converters.jpg["lowresjpg.pdf"] = + function(oldname,newname,resolution) + figures.programs.run ( + [[gm]], + [[convert -geometry %nx%x%ny% -compress JPEG "%old%" "%new%"]], + { + old = old, + new = new, + nx = resolution or 300, + ny = resolution or 300, + } + ) + end +\stopluacode +\stoptyping + +You can limit the search to a few types and set the resolution with: + +\starttyping +\setupexternalfigures + [order={pdf,jpg}, + resolution=100, + method=auto] +\stoptyping + +And use it like: + +\starttyping +\externalfigure[verybig.jpg][height=10cm] +\stoptyping + +The second string passed to the \type {run} helper contains the arguments to the +first one. The variables between percent signs get replaced by the variables in +the tables passed as third argument. + +\stopsection + \stopchapter \stopcomponent + |