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.
Rotates a pict’s drawing by theta radians counter-clockwise.
The bounding box of the resulting pict is the box encloses the rotated corners of pict (which inflates the area of the bounding box, unless theta is a multiple of half of pi). The ascent and descent lines of the result’s bounding box are the horizontal lines that bisect the rotated original lines; if the ascent line drops below the descent line, the two lines are flipped.
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.