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
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 |
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 | ||
Indicates whether an object has a specified property defined. | Object | ||
Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | ||
Indicates whether the specified property exists and is enumerable. | Object | ||
Sets the availability of a dynamic property for loop operations. | Object | ||
Returns the string representation of this object, formatted according to locale-specific conventions. | Object | ||
Returns the string representation of the specified object. | Object | ||
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 ) — A value between 0.0 and 100.0.
The smaller the 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.
|
ByteArray — Returns a ByteArray object containing JPEG-encoded image data.
|
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.
| |
width:int — The width of the input image, in pixels.
| |
height:int — The height of the input image, in pixels.
| |
transparent:Boolean (default = true ) — If false ,
alpha channel information is ignored.
|
ByteArray — Returns a ByteArray object containing JPEG-encoded image data.
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Thu Dec 6 2018, 01:12 PM -08:00