Bitmap

java.lang.Object
- com.geoway.mobile.graphics.Bitmap

```
public class Bitmap
extends java.lang.Object
```
A class that provides the functionality to store, compress, uncompress and resize basic image formats.
Currently supported formats are png and jpeg. Upon loading compressed images will be converted to
alpha premultiplied uncompressed bitmaps of various image formats.

字段概要

字段
限定符和类型字段和说明

protected boolean swigCMemOwn

字段
限定符和类型	字段和说明
`protected boolean`	`swigCMemOwn`

构造器概要

构造器
构造器和说明
`Bitmap(BinaryData pixelData, long width, long height, ColorFormat colorFormat, int bytesPerRow)` Constructs a bitmap from an already decoded vector of bytes.
`Bitmap(long cPtr, boolean cMemoryOwn)`

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法和说明
`void`	`compressForGL()`
`BinaryData`	`compressToInternal()` Compresses this bitmap to a internal format.
`BinaryData`	`compressToPng()` Compresses this bitmap to a png.
`static Bitmap`	`createFromCompressed(BinaryData compressedData)` Creates a new bitmap from compressed byte vector.
`void`	`delete()`
`boolean`	`equals(java.lang.Object obj)` Checks if this object is equal to the specified object.
`protected void`	`finalize()`
`long`	`getBytesPerPixel()` Returns the bytes per pixel parameter of this bitmap.
`ColorFormat`	`getColorFormat()` Returns the color format of this bitmap.
`static long`	`getCPtr(Bitmap obj)`
`long`	`getHeight()` Returns the height of the bitmap.
`Bitmap`	`getPaddedBitmap(int xPadding, int yPadding)` Returns paddedsub-bitmap with specified offsets and dimensions.
`BinaryData`	`getPixelData()` Returns a copy of the pixel data of this bitmap.
`Bitmap`	`getResizedBitmap(long width, long height)` Returns resized version of the bitmap.
`Bitmap`	`getRGBABitmap()` Returns copy of the bitmap converted to RGBA format.
`Bitmap`	`getSubBitmap(int xOffset, int yOffset, int width, int height)` Returns sub-bitmap with specified offsets and dimensions.
`long`	`getWidth()` Returns the width of the bitmap.
`int`	`hashCode()` Returns the hash value of this object.
`void`	`preMultipliedAlpha()`
`void`	`update(int xOffset, int yOffset, Bitmap bitMap)`

从类继承的方法 java.lang.Object
clone, getClass, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - swigCMemOwn
```
protected boolean swigCMemOwn
```
- 构造器详细资料
  - Bitmap
```
public Bitmap(long cPtr,
              boolean cMemoryOwn)
```
  - Bitmap
```
public Bitmap(BinaryData pixelData,
              long width,
              long height,
              ColorFormat colorFormat,
              int bytesPerRow)
```
    Constructs a bitmap from an already decoded vector of bytes. The bitmap data is expected to be alpha premultiplied, if alpha channel is used.
    If the power of two conversion flag is set, additional padding will be added to the image to make it's dimensions power of two.
    This can be useful when creating OpenGL textures from the Bitmap, because some GPUs perform badly with non power of two textures.
    
    参数:
    
    pixelData - A vector of decoded, premultiplied bitmap bytes.
    
    width - The width of the bitmap.
    
    height - The height of the bitmap.
    
    colorFormat - The color format of the bitmap.
    
    bytesPerRow - The total number of bytes per row. Some bitmaps have additional padding at the end of each row. If the value is negative, then bitmap is assumed to be vertically flipped. In this case absolute value of the bytesPerRow value is used.
- 方法详细资料
  - getCPtr
```
public static long getCPtr(Bitmap obj)
```
  - finalize
```
protected void finalize()
```
    覆盖:
    
    finalize 在类中 java.lang.Object
  - delete
```
public void delete()
```
  - equals
```
public boolean equals(java.lang.Object obj)
```
    Checks if this object is equal to the specified object.
    
    覆盖:
    
    equals 在类中 java.lang.Object
    
    参数:
    
    obj - The reference object.
    
    返回:
    
    True when objects are equal, false otherwise.
  - hashCode
```
public int hashCode()
```
    Returns the hash value of this object.
    
    覆盖:
    
    hashCode 在类中 java.lang.Object
    
    返回:
    
    The hash value of this object.
  - getWidth
```
public long getWidth()
```
    Returns the width of the bitmap.
    
    返回:
    
    The width of the bitmap.
  - getHeight
```
public long getHeight()
```
    Returns the height of the bitmap.
    
    返回:
    
    The height of the bitmap.
  - getColorFormat
```
public ColorFormat getColorFormat()
```
    Returns the color format of this bitmap.
    
    返回:
    
    The color format of this bitmap.
  - getBytesPerPixel
```
public long getBytesPerPixel()
```
    Returns the bytes per pixel parameter of this bitmap. Valid values are 1, 2, 3 and 4.
    
    返回:
    
    The bytes per pixel parameter of this bitmap.
  - getPixelData
```
public BinaryData getPixelData()
```
    Returns a copy of the pixel data of this bitmap.
    
    返回:
    
    A binary data of the bitmap's pixel data.
  - compressToPng
```
public BinaryData compressToPng()
```
    Compresses this bitmap to a png.
    
    返回:
    
    A byte vector of the png's data.
  - compressToInternal
```
public BinaryData compressToInternal()
```
    Compresses this bitmap to a internal format.
    This operation is intended for serialization of the data only, no actual compression is performed.
    
    返回:
    
    A byte vector of the serialized data.
  - getResizedBitmap
```
public Bitmap getResizedBitmap(long width,
                               long height)
```
    Returns resized version of the bitmap. The power of two padding added during the construction of this bitmap
    will be removed prior to resizing. If the power of two conversion flag is set, new padding will be added to the image
    after resizing to make it's dimensions power of two.
    
    参数:
    
    width - The new width of this bitmap.
    
    height - The new height of this bitmap.
    
    返回:
    
    The resized bitmap instance or null in case of error (wrong dimensions).
  - getSubBitmap
```
public Bitmap getSubBitmap(int xOffset,
                           int yOffset,
                           int width,
                           int height)
```
    Returns sub-bitmap with specified offsets and dimensions.
    
    参数:
    
    xOffset - X coordinate offset in the bitmap.
    
    yOffset - Y coordinate offset in the bitmap.
    
    width - Width of the sub-bitmap.
    
    height - Height of the sub-bitmap.
    
    返回:
    
    Sub-bitmap instance or null in case of error (wrong dimensions).
  - getPaddedBitmap
```
public Bitmap getPaddedBitmap(int xPadding,
                              int yPadding)
```
    Returns paddedsub-bitmap with specified offsets and dimensions.
    
    参数:
    
    xPadding - Padding along X coordinate. If negative value is used, the bitmap is padded from the left. By default, bitmap is padded from the right.
    
    yPadding - Padding along Y coordinate. If negative value is used, the bitmap is padded from the top. By default, bitmap is padded from the bottom.
    
    返回:
    
    Padded bitmap instance or null in case of error (wrong dimensions).
  - getRGBABitmap
```
public Bitmap getRGBABitmap()
```
    Returns copy of the bitmap converted to RGBA format.
    
    返回:
    
    The bitmap with identical dimensions but converted to RGBA format.
  - createFromCompressed
```
public static Bitmap createFromCompressed(BinaryData compressedData)
```
    Creates a new bitmap from compressed byte vector.
    If the power of two conversion flag is set, additional padding will be added to the image to make it's dimensions power of two.
    
    参数:
    
    compressedData - The compressed bitmap data.
    
    返回:
    
    The bitmap created from the compressed data. If the decompression fails, null is returned.
  - preMultipliedAlpha
```
public void preMultipliedAlpha()
```
  - compressForGL
```
public void compressForGL()
```
  - update
```
public void update(int xOffset,
                   int yOffset,
                   Bitmap bitMap)
```

类 Bitmap

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

swigCMemOwn

构造器详细资料

Bitmap

Bitmap

方法详细资料

getCPtr

finalize

delete

equals

hashCode

getWidth

getHeight

getColorFormat

getBytesPerPixel

getPixelData

compressToPng

compressToInternal

getResizedBitmap

getSubBitmap

getPaddedBitmap

getRGBABitmap

createFromCompressed

preMultipliedAlpha

compressForGL

update