Adobe 65015634 Scripting Guide - Page 66

Applying a wave filter, Adobe Photoshop CS4 JavaScript Scripting Reference, Hello

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CHAPTER 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. NOTE: Look up the following classes in the Adobe Photoshop CS4 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. NOTE: 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. NOTE: 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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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 CS4 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.