2.4 Pict Drawing Adjusters
(scale pict factor) → pict? |
pict : pict? |
factor : real? |
(scale pict w-factor h-factor) → pict? |
pict : pict? |
w-factor : real? |
h-factor : real? |
Scales a pict drawing, as well as its bounding-box. The drawing
is scaled by adjusting the destination dc<%>’s scale while
drawing the original pict.
Creats a container picture that doesn’t draw the child picture,
but uses the child’s size.
Selects a specific pen width for drawing, which applies to pen drawing
for pict that does not already use a specific pen width.
A #f value for w makes the pen transparent (in contrast
to a zero value, which means “as thin as possible for the target device”).
(colorize pict color) → pict? | |||||||||||
pict : pict? | |||||||||||
|
Selects a specific color drawing, which applies to drawing in
pict that does not already use a specific color. The
black-and-white parameter causes all non-white colors to be
converted to black.
(cellophane pict opacity) → pict? |
pict : pict? |
opacity : (real-in 0 1) |
Makes the given pict semi-transparent, where an opacity of
0 is fully transparent, and an opacity of 1 is fully
opaque. See set-alpha for information about the
contexts and cases when semi-transparent drawing works.
Clips a pict’s drawing to its bounding box.
(inset/clip pict amt) → pict? |
pict : pict? |
amt : real? |
(inset/clip pict h-amt v-amt) → pict? |
pict : pict? |
h-amt : real? |
v-amt : real? |
(inset/clip pict l-amt t-amt r-amt b-amt) → pict? |
pict : pict? |
l-amt : real? |
t-amt : real? |
r-amt : real? |
b-amt : real? |
Insets and clips the pict’s drawing to its bounding
box. Usually, the inset amounts are negative.
(scale/improve-new-text pict-expr scale-expr) |
(scale/improve-new-text pict-expr x-scale-expr y-scale-expr) |
(black-and-white) → boolean? |
(black-and-white on?) → void? |
on? : any/c |
A parameter that determines whether colorize uses color or
black-and-white colors.