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Directives- ⌂ #IMAGE
- Operations
#IMAGE Shadow
Add a drop-shadow "under" the current image. Useful when subsequently compositing the image onto another image.
Only supported by ImageMagick image processing engine.
Prototype
#IMAGE($image_bytes, 'Shadow', $x, $y, $opacity, $sigma)
Parameters
x and y parameters do not have an effect in PHP's ImageMagick implementation.
- x - Horizontal offset in pixels from "center". A positive number moves the shadow left. A negative number moves it right.
- y - Vertical offset in pixels from "center". A positive number moves the shadow down. A negative number moves it up.
- opacity - How "dark" to make the shadow. 0 = transparent. 100 = solid black.
- sigma - Width of "blur". 0 = tiny/invisible, 4 = pretty wide.
Example
The following example rotates the image before applying the shadow and then rotates it back, to work-around the x/y parameters having no effect (issue with PHP ImageMagick).
#{
// Add drop-shadow to logo, place it in a white circle with a drop-
// shadow and overlay that in the upper-right of a banner image
$CircleDiameter = 512;
$ShiftX = 6;
$ShiftY = 3;
$LogoSize = $CircleDiameter * 0.65;
$CircleShiftX = $CircleDiameter / $ShiftX;
$CircleShiftY = $CircleDiameter / $ShiftY * -1;
// Overlay logo in center of circle
$Logo = image($Logo,'Shadow',0,0,45,1);
$LogoWidth = image($Logo,'GetWidth');
$LogoHeight = image($Logo,'GetHeight');
$X = ($CircleDiameter / 2) - ($LogoWidth / 2);
$Y = ($CircleDiameter / 2) - ($LogoHeight / 2);
$Circle = image($Circle,'Composite',$Logo,$X,$Y,'Dissolve',100);
// Add drop-shadow to circle (rotate before and after to adjust
// angle from lower-right to lower-left)
$Circle = image($Circle,'Rotate',270,'none');
$Circle = image($Circle,'Shadow',0,0,50,4);
$Circle = image($Circle,'Rotate',-270,'none');
// Overlay circle with logo on banner image
$BannerWidth = image($Banner,'GetWidth');
$X = $BannerWidth - $CircleDiameter + $CircleShiftX;
$Y = $CircleShiftY;
$Banner = image($Banner,'Composite',$Circle,$X,$Y,'Dissolve',100);
}