Wild guess: this may be a bug in record-dc%. IIRC, DrRacket uses record-dc% when rendering picts, and it would make sense that serialization would too. But drawing picts directly wouldn't.
The last time I saw that kind of bug (inconsistent pict rendering between contexts), it turned out that record-dc% was not keeping track of some properties of the drawing, and so rendering was off when the recording was rendered. As a first step, I'd recommend trying to render your pict using a regular dc and a render-dc, to see if that's where the difference is coming from. Then, if that's the case, you can see which dc commands your example runs, and make sure that record-dc records everything about them faithfully. Vincent On Thu, 06 Oct 2016 14:32:19 -0500, Leif Andersen wrote: > > I have been playing with scribble and serialize/deserialize a bit lately > in a (somewhat successful) attempt to make my paper build in a > reasonable amount of time. > > Anyway, I noticed some interesting behavior when Scribble is combined > with picts and serialize/deserialize. And I'm kind of stumped as to what > could cause it. > > Take the following file: > > ``` > #lang scribble/manual > > @(require pict > racket/serialize) > > @(define x > (vc-append > (filled-rectangle 30 10 #:color "yellow") > (filled-rectangle 30 10 #:color "yellow"))) > > @x > > @(deserialize (serialize x)) > ``` > > This code defines a pict made out of two yellow rectangles stacked on > top of each other. It makes a document containing these two rectangles, > followed by the two rectangles after they've been serialized and > deserialized. Provided that `x` is serializable (which it supposedly > is), I would imagine that the two pictures would look the same. Instead > however, it ends up looking like this. (The PDF file is also attached). > Inline image 1 > Note how after its been serialized and deserialized, the two rectangles, > appear slightly further apart and have a doubly thick line. > > For what its worth, if I have DrRacket draw the pict it always shows up > like the bottom rectangle. > > Both of these images make sense (depending on how we intemperate > border), but I'm a bit confused why it would show up differently after > being serialized and deserialized. Any ideas? > > Thank you. > > ~Leif Andersen > > -- > You received this message because you are subscribed to the Google > Groups "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send > an email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
