| Package | mx.graphics.codec |
| Class | public class JPEGEncoder |
| Inheritance | JPEGEncoder  Object |
| Implements | IImageEncoder |
| Language Version: | ActionScript 3.0 |
| Product Version: | Flex 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
Public Properties
Hide Inherited Public Properties
Show Inherited Public Properties| 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 | |
Public Methods
| Method | Defined By | ||
|---|---|---|---|
JPEGEncoder(quality:Number = 50.0)
Constructor. | JPEGEncoder | ||
Converts the pixels of BitmapData object
to a JPEG-encoded ByteArray object. | JPEGEncoder | ||
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 this object, formatted according to locale-specific conventions. | 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 | |
Property Detail
contentType | property |
Constructor Detail
JPEGEncoder | () | Constructor |
public function JPEGEncoder(quality:Number = 50.0)| Language Version: | ActionScript 3.0 |
| Product Version: | Flex 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
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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Method Detail
encode | () | method |
public function encode(bitmapData:BitmapData):ByteArray| Language Version: | ActionScript 3.0 |
| Product Version: | Flex 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
Converts the pixels of BitmapData object to a JPEG-encoded ByteArray object.
Parameters
bitmapData:BitmapData — The input BitmapData object.
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ByteArray — Returns a ByteArray object containing JPEG-encoded image data.
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encodeByteArray | () | method |
public function encodeByteArray(byteArray:ByteArray, width:int, height:int, transparent:Boolean = true):ByteArray| Language Version: | ActionScript 3.0 |
| Product Version: | Flex 3 |
| Runtime Versions: | Flash Player 9, AIR 1.1 |
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 — Returns a ByteArray object containing JPEG-encoded image data.
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Mon Nov 28 2011, 06:48 AM -08:00