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USING TVFONT - draft.
Introduction.
TVFONT is a
v e r s i o n o f CRE (January 1973)
that
was
spm, i a I i zed t o t h e t a s k o f c o n v e r t i n g t e l e v i s i o n images
into type
f o n t s f o r the X G P ,
X e r o x G r a p h i c s P r i n t e r . T h e o r i g i n a l i d e a was to
denmns t r a t e t h e u t i l i t y o f a p o l y g o n r e p r e s e n t a t i o n f o r scaling,
moo th i ng a n d e d i t i n g t y p o g r a p h i c a l g l y p h s ;
the resulting h a c k
( d e m o n s t r a t i o n p r o g r a m ) w a s e x t e n d e d a n d d e v e l o p e d b y Tovar flock
i n t o t h e p r o g r a m c a l l e d TVFONT. Accordingly, t h e main i d e a o f TVFDNT
i s to convert video rasters
into polygons,
t o e d i t a n d scale t h e
po I ygons, a n d t o c o n v e r t t h e p o l y g o n s b a c k i n t o b i t r a s t e r s .
1
This section IV,
wi I I b e a v a i l a b l e as a T V F O N T user manual
in
a n o t h e r s i x months: i t is p r e s e n t e d h e r e to g i v e t h e would be
u s e r a s t a r t , a n d t h e g e n e r a l r e a d e r a sample o f t h e d e s i g n and
extent of TVFONT.
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i
.
The
figure
on
page
41
is
an
example
of
expanding
and
c o n t r a c t i n g a font w i t h o u t manual t o u c h i n g u p . T h e t o p sample is the
o r i g i n a l (BDR40 f r o m CMU). T h e rmainder h a v e b e e n g e n e r a t e d b y
TVFONT. The expans i on or contract ion ~-l-as done by c o n v e r t i n g f o n t s
from
b i t m a t r i c e s i n t o a polygonal representation,
multiplying by
t h e appropr i ate
c o n s t a n t and
r e c o n v e r t i n g back
into
a
b i t
r e p r e s e n t a t i o n . The fo I I OLD i ng paragraph
i s a n e x a m p l e o f a f o n t made
from t e l e v i s i o n p i c t u r e s :
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