C
HAPTER
3: Scripting Photoshop
Advanced Scripting
66
JS
To create and specify details in a text item:
1.
Type the following code into the
HelloWorldDoc
script immediately before the statements at the end
of the file that restore original preferences.
//create a reference to the active document
docRef = app.activeDocument
//create a variable named textColor
//create a SolidColor object whose color is red
//assign the object to textColor
textColor = new solidColor
textColor.rgb.red = 255
textColor.rgb.green = 0
textColor.rgb.blue = 0
helloWorldText = "Hello, World!"
//create a variable named newTextLayer
//use the add() method of the artLayers class to create a layer object
//assign the object to newTextLayer
newTextLayer = docRef.artLayers.add()
//use the kind property of the artLayer class to make the layer a text layer
newTextLayer.kind = LayerKind.TEXT
newTextLayer.textItem.contents = helloWorldText
newTextLayer.textItem.position = Array(0.75, 1)
newTextLayer.textItem.size = 36
newTextLayer.textItem.color = textColor
2.
Save the script, and then open Photoshop and select the script from the Scripts menu (choose
File >
Script > HelloWorldDoc
). Be patient while Photoshop executes your commands one by one.
3.
After viewing the document in Photoshop, close Photoshop without saving the document.
N
OTE
:
Look up the following classes in the
Adobe Photoshop CS5 JavaScript Scripting Reference
, or in the
ExtendScript Object Model Viewer to see if you understand how you used them in this script:
➤
SolidColor
➤
ArtLayer
. Notice that the
LayerKind.TEXT
value of the kind property uses the
LayerKind
constant.
Constants are always depicted in upper case letters in Photoshop JavaScripts.
Applying a wave filter
In this section we’ll apply a wave filter to the word
Hello
in our document. This entails the following steps:
➤
Set the document width and height to pixels and then rasterize the text object in the Text Layer.
N
OTE
:
Because text is a vector graphic and cannot apply a wave filter to vector graphics, we must first
convert the image to a bitmap. Rasterizing converts mathematically defined vector artwork to pixels.
For more information on rasterizing, refer to Photoshop Help.
➤
Select the area of the layer to which we want to apply the wave filter.
N
OTE
:
See
“Defining the area of a selection object” on page 67
in order to understand the code within
the script that accomplishes this task.
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