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[Texmacs-dev] A few explanations please

From: Salman Khilji
Subject: [Texmacs-dev] A few explanations please
Date: Tue, 20 Apr 2004 21:07:35 -0700
User-agent: KMail/1.5.1

Can someone please explain the following quantities please.  What is meant by 
logical?  What is meant by ink here?  Am I painting the folliwing picture 

| A  |

The "+" signs refer to x1, y1, x2, y2.

The bounds of the letter A refer to x3, y3, and x4, y4.

Am I correct?

class box_rep: public abstract_struct {

  SI x1, y1;    // under left corner (logical)
  SI x2, y2;    // upper right corner (logical)
  SI x3, y3;    // under left corner (ink)
  SI x4, y4;    // upper right corner (ink)

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