| 套件 | mx.graphics.codec |
| 類別 | public class JPEGEncoder |
| 繼承 | JPEGEncoder  Object |
| 實作 | IImageEncoder |
| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 3 |
| 執行階段版本: | Flash Player 9, AIR 1.1 |
公用屬性
隱藏繼承公用屬性
顯示繼承公用屬性| 屬性 | 定義自 | ||
|---|---|---|---|
 | constructor : Object
類別物件的參照或是特定物件實體的建構函數。 | Object | |
| contentType : String [唯讀]
The MIME type for the JPEG encoded image. | JPEGEncoder | ||
公用方法
| 方法 | 定義自 | ||
|---|---|---|---|
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 | ||
|
指出物件是否有已定義的指定屬性。 | Object | |
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指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。 | Object | |
|
指出指定的屬性是否存在，以及是否可列舉。 | Object | |
|
為迴圈作業設定動態屬性的可用性。 | Object | |
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傳回代表此物件的字串，根據地區特定慣例進行格式化。 | Object | |
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會傳回指定之物件的字串形式。 | Object | |
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會傳回指定之物件的基本值。 | Object | |
屬性詳細資訊
contentType | 屬性 |
建構函式詳細資料
JPEGEncoder | () | 建構函式 |
public function JPEGEncoder(quality:Number = 50.0)| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 3 |
| 執行階段版本: | Flash Player 9, AIR 1.1 |
Constructor.
參數quality: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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方法詳細資訊
encode | () | 方法 |
public function encode(bitmapData:BitmapData):ByteArray| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 3 |
| 執行階段版本: | Flash Player 9, AIR 1.1 |
Converts the pixels of BitmapData object to a JPEG-encoded ByteArray object.
參數
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 | () | 方法 |
public function encodeByteArray(byteArray:ByteArray, width:int, height:int, transparent:Boolean = true):ByteArray| 語言版本: | ActionScript 3.0 |
| 產品版本: | Flex 3 |
| 執行階段版本: | 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.
參數
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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Tue Jun 12 2018, 03:47 PM Z