| Package | mx.graphics.codec |
| Class | public class JPEGEncoder |
| Inheritance | JPEGEncoder  Object |
| Implements | IImageEncoder |
| Property | Defined By | ||
|---|---|---|---|
 | constructor : Object
A reference to the class object or constructor function for a given object instance.
| Object | |
| contentType : String
[read-only]
The MIME type for the JPEG encoded image.
| JPEGEncoder | ||
| prototype : Object
[static]
A reference to the prototype object of a class or function object.
| Object | |
| Method | Defined By | ||
|---|---|---|---|
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JPEGEncoder(quality:Number = 50.0)
Constructor.
| JPEGEncoder | ||
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Converts the pixels of BitmapData object
to a JPEG-encoded ByteArray object.
| JPEGEncoder | ||
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Converts a ByteArray object containing raw pixels
in 32-bit ARGB (Alpha, Red, Green, Blue) format
to a new JPEG-encoded ByteArray object.
| JPEGEncoder | ||
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Indicates whether an object has a specified property defined.
| Object | |
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Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter.
| Object | |
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Indicates whether the specified property exists and is enumerable.
| Object | |
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Sets the availability of a dynamic property for loop operations.
| Object | |
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Returns the string representation of the specified object.
| Object | |
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Returns the primitive value of the specified object.
| Object | |
| contentType | property |
Hide Inherited Public Properties
Show Inherited Public PropertiescontentType:String [read-only]
The MIME type for the JPEG encoded image.
The value is "image/jpeg".
public function get contentType():String
| JPEGEncoder | () | Constructor |
public function JPEGEncoder(quality:Number = 50.0)
Constructor.
Parametersquality:Number (default = 50.0)quality value,
the smaller the file size of the resultant image.
The value does not affect the encoding speed.
Note that even though this value is a number between 0.0 and 100.0,
it does not represent a percentage.
The default value is 50.0.
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| encode | () | method |
public function encode(bitmapData:BitmapData):ByteArray
Converts the pixels of BitmapData object to a JPEG-encoded ByteArray object.
Parameters
bitmapData:BitmapData — The input BitmapData object.
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ByteArray |
| encodeByteArray | () | method |
public function encodeByteArray(byteArray:ByteArray, width:int, height:int, transparent:Boolean = true):ByteArray
Converts a ByteArray object containing raw pixels in 32-bit ARGB (Alpha, Red, Green, Blue) format to a new JPEG-encoded ByteArray object. The original ByteArray is left unchanged. Transparency is not supported; however you still must represent each pixel as four bytes in ARGB format.
Parameters
byteArray:ByteArray — The input ByteArray object containing raw pixels.
This ByteArray should contain
4 width height bytes.
Each pixel is represented by 4 bytes, in the order ARGB.
The first four bytes represent the top-left pixel of the image.
The next four bytes represent the pixel to its right, etc.
Each row follows the previous one without any padding.
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width:int — The width of the input image, in pixels.
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height:int — The height of the input image, in pixels.
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transparent:Boolean (default = true)false,
alpha channel information is ignored.
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ByteArray |