Foxit PDF SDK

Public Member Functions | Static Public Attributes | List of all members
com.foxit.sdk.common.Image Class Reference
Inheritance diagram for com.foxit.sdk.common.Image:

## Public Member Functions
| Image () throws com.foxit.sdk.PDFException
| Constructor. More...
| Image (byte[] buffer) throws com.foxit.sdk.PDFException
| Constructor, from a memory buffer. More...
| Image (FileReaderCallback file_read) throws com.foxit.sdk.PDFException
| Constructor, with a file read callback object. More...
| Image (Image other)
| Constructor, with another image object. More...
| Image (String path) throws com.foxit.sdk.PDFException
| Constructor, from an existing image file path. More...
boolean | addFrame (Bitmap bitmap) throws com.foxit.sdk.PDFException
| Add a bitmap as a frame. (Unsupported DIB formats: com.foxit.sdk.common.Bitmap.e_DIBRgb565 and com.foxit.sdk.common.Bitmap.e_DIB8bppMask ) More...
synchronized void | delete ()
| Clean up related C++ resources immediately. More...
Bitmap | getFrameBitmap (int index) throws com.foxit.sdk.PDFException
| Get a frame bitmap, specified by index. More...
int | getFrameCount () throws com.foxit.sdk.PDFException
| Get frame count. More...
int | getHeight () throws com.foxit.sdk.PDFException
| Get image height. More...
int | getOrientation () throws com.foxit.sdk.PDFException
| Get image orientation. More...
int | getType () throws com.foxit.sdk.PDFException
| Get image type. More...
int | getWidth () throws com.foxit.sdk.PDFException
| Get image width. More...
int | getXDPI () throws com.foxit.sdk.PDFException
| Get DPI for X-axis. More...
int | getYDPI () throws com.foxit.sdk.PDFException
| Get DPI for Y-axis. More...
boolean | isEmpty ()
| Check whether current object is empty or not. More...
boolean | saveAs (StreamCallback file, String file_extension) throws com.foxit.sdk.PDFException
| Save current image as an image file. More...
boolean | saveAs (String file_path) throws com.foxit.sdk.PDFException
| Save current image as an image file. More...
void | setDPIs (int x_dpi, int y_dpi) throws com.foxit.sdk.PDFException
| Set DPI for X-axis and Y-axis. More...

## Static Public Attributes
static final int | e_BMP = 1
| Image type is BMP.
static final int | e_GIF = 4
| Image type is GIF.
static final int | e_JBIG2 = 8
| Image type is JBIG2. More...
static final int | e_JPG = 2
| Image type is JPG or JPEG.
static final int | e_JPX = 6
| Image type is JPX or JPEG-2000.
static final int | e_None = 0
| Not have image type yet. More...
static final int | e_OrientationFlipH = 2
| Flip Horizontal.
static final int | e_OrientationFlipV = 4
| Flip Vertical.
static final int | e_OrientationNone = 0
| No orientation.
static final int | e_OrientationNormal = 1
| Normal orientation.
static final int | e_OrientationRotate180 = 3
| Rotate 180 degrees in clockwise direction.
static final int | e_OrientationRotate270 = 8
| Rotate 90 degrees in counter-clockwise direction.
static final int | e_OrientationRotate270FlipH = 7
| First rotate 90 in counter-clockwise direction and then flip horizontal.
static final int | e_OrientationRotate90 = 6
| Rotate 90 degrees in clockwise direction.
static final int | e_OrientationRotate90FlipH = 5
| First rotate 90 in clockwise direction and then flip horizontal.
static final int | e_PNG = 3
| Image type is PNG.
static final int | e_TIF = 5
| Image type is TIF or TIFF.
static final int | e_Unknown = -1
| Unknown image type.
static final int | e_WEBP = 9
| Image type is webp. More...

## Detailed Description

Foxit PDF SDK offers following image types:

- BMP: bitmap image format. It only support single frame. Foxit PDF SDK supports to load image from a BMP image file, get some basic information, get its bitmap, change its bitmap and save it as an image file.
- JPG: joint photographic experts group image format. It only support single frame. Foxit PDF SDK supports to load image from a JPG image file, get some basic information, get its bitmap, change its bitmap and save it as an image file.
- PNG: portable network graphics image format. It only support single frame. Foxit PDF SDK supports to load image from a PNG image file, get some basic information, get its bitmap, change its bitmap and save it as an image file.
- GIF: graphics interchange format. It supports multiple frames. Foxit PDF SDK supports to load image from a GIF image file, get its size, get its bitmap, change its bitmap and save it as an image file.
- TIF: tagged image file format. It supports multiple frames. Foxit PDF SDK supports to load image from a TIF image file, get some basic information, get its bitmap, change its bitmap and save it as an image file.
- JPX: JPEG-2000 image format. It only support single frame. Foxit PDF SDK supports to load image from a JPX image file, get its size, get its bitmap, change its bitmap and save it as an image file.
- JBIG2: JBIG2 image format. It only support single frame. Foxit PDF SDK supports to load image from a JBIG2 image file, get its size, and save it as an image file. Foxit PDF SDK does not support to get its frame bitmap yet.

## Constructor & Destructor Documentation

## ◆ Image() [1/5]

com.foxit.sdk.common.Image.Image | ( |  | ) | throws com.foxit.sdk.PDFException

Constructor.

This constructor is to construct a new image object (without any data). The image type of this constructed image object would be com.foxit.sdk.common.Image.e_None .

## ◆ Image() [2/5]

com.foxit.sdk.common.Image.Image | ( | String | path | ) | throws com.foxit.sdk.PDFException

Constructor, from an existing image file path.

Parameters

  [in] | path | A full path of an existing image file. It should not be an empty string.

## ◆ Image() [3/5]

com.foxit.sdk.common.Image.Image | ( | byte[] | buffer | ) | throws com.foxit.sdk.PDFException

Constructor, from a memory buffer.

Parameters

  [in] | buffer | A memory buffer. The image file data should be fully loaded in this memory buffer. It should not be null.

## ◆ Image() [4/5]

com.foxit.sdk.common.Image.Image | ( | FileReaderCallback | file_read | ) | throws com.foxit.sdk.PDFException

Constructor, with a file read callback object.

Parameters

  [in] | file_read | A com.foxit.sdk.common.fxcrt.FileReaderCallback object which is implemented by user to load an image file. It should not be null.

## ◆ Image() [5/5]

com.foxit.sdk.common.Image.Image | ( | Image | other | ) |

Constructor, with another image object.

Parameters

  [in] | other | Another image object.

## Member Function Documentation

## ◆ addFrame()

boolean com.foxit.sdk.common.Image.addFrame | ( | Bitmap | bitmap | ) | throws com.foxit.sdk.PDFException

Add a bitmap as a frame. (Unsupported DIB formats: com.foxit.sdk.common.Bitmap.e_DIBRgb565 and com.foxit.sdk.common.Bitmap.e_DIB8bppMask )

Currently, this function does not support an image with type com.foxit.sdk.common.Image.e_JBIG2 , or com.foxit.sdk.common.Image.e_Unknown .
For supporting image types:

- If current image's type is com.foxit.sdk.common.Image.e_TIF , com.foxit.sdk.common.Image.e_GIF , or com.foxit.sdk.common.Image.e_None , this function will add the new bitmap to be the new last frame.
- If current image's type is one of other types, which only contains single frame, this function will use the new bitmap to replace the first frame.

Parameters

  [in] | bitmap | A valid bitmap as a frame to be added or set.

Returns
  true means success, while false means failure.

## ◆ delete()

synchronized void com.foxit.sdk.common.Image.delete | ( |  | ) |

Clean up related C++ resources immediately.

Returns
  None.

Note
  Once this function is called, current object cannot be used anymore.

Reimplemented from com.foxit.sdk.common.Base.

## ◆ getFrameBitmap()

Bitmap com.foxit.sdk.common.Image.getFrameBitmap | ( | int | index | ) | throws com.foxit.sdk.PDFException

Get a frame bitmap, specified by index.

Currently, this function does not support an image with type com.foxit.sdk.common.Image.e_JBIG2 . This function can only support to get a frame bitmap which is in following formats:
com.foxit.sdk.common.Bitmap.e_DIB8bppMask , com.foxit.sdk.common.Bitmap.e_DIB8bpp , com.foxit.sdk.common.Bitmap.e_DIBRgb , com.foxit.sdk.common.Bitmap.e_DIBRgb32 , com.foxit.sdk.common.Bitmap.e_DIBArgb .
For other unsupported DIB format, this function will return a bitmap object which's function Bitmap.isEmpty returns true.

Parameters

  [in] | index | Index of the frame. Valid range: from 0 to (count-1). count is returned by function Image.getFrameCount .

Returns
  The frame bitmap. If the return value of function Bitmap.isEmpty for the returned bitmap object is true, that means the frame's DIB format is not supported.

## ◆ getFrameCount()

int com.foxit.sdk.common.Image.getFrameCount | ( |  | ) | throws com.foxit.sdk.PDFException

Get frame count.

Currently, this function does not support an image with type com.foxit.sdk.common.Image.e_JBIG2 .

Returns
  The frame count.

## ◆ getHeight()

int com.foxit.sdk.common.Image.getHeight | ( |  | ) | throws com.foxit.sdk.PDFException

Get image height.

If the image has multiple frames, usually the first frame's size will be treated as the image size.

Returns
  Image height.

## ◆ getOrientation()

int com.foxit.sdk.common.Image.getOrientation | ( |  | ) | throws com.foxit.sdk.PDFException

Get image orientation.

This function only support an image with type com.foxit.sdk.common.Image.e_JPG and com.foxit.sdk.common.Image.e_TIF .

Returns
  Image orientation. Please refer to values starting from com.foxit.sdk.common.Image.e_OrientationNone and this would be one of these values.

## ◆ getType()

int com.foxit.sdk.common.Image.getType | ( |  | ) | throws com.foxit.sdk.PDFException

Get image type.

If current image is a new image (not constructed from any image file), its type would be com.foxit.sdk.common.Image.e_None .

Returns
  Image type. Please refer to values starting from com.foxit.sdk.common.Image.e_Unknown and this would be one of these values.

## ◆ getWidth()

int com.foxit.sdk.common.Image.getWidth | ( |  | ) | throws com.foxit.sdk.PDFException

Get image width.

If the image has multiple frames, usually the first frame's size will be treated as the image size.

Returns
  Image width..

## ◆ getXDPI()

int com.foxit.sdk.common.Image.getXDPI | ( |  | ) | throws com.foxit.sdk.PDFException

Get DPI for X-axis.

Currently, this function does not support an image with type com.foxit.sdk.common.Image.e_JPX , com.foxit.sdk.common.Image.e_GIF or com.foxit.sdk.common.Image.e_JBIG2 or com.foxit.sdk.common.Image.e_WEBP .
For a new image (not constructed from any image file), the default DPI for X-axis is 96.

Returns
  DPI value for X-axis.

## ◆ getYDPI()

int com.foxit.sdk.common.Image.getYDPI | ( |  | ) | throws com.foxit.sdk.PDFException

Get DPI for Y-axis.

Currently, this function does not support an image with type com.foxit.sdk.common.Image.e_JPX , com.foxit.sdk.common.Image.e_GIF , com.foxit.sdk.common.Image.e_JBIG2 or com.foxit.sdk.common.Image.e_WEBP .
For a new image (not constructed from any image file), the default DPI for Y-axis is 96.

Returns
  DPI value for Y-axis.

## ◆ isEmpty()

boolean com.foxit.sdk.common.Image.isEmpty | ( |  | ) |

Check whether current object is empty or not.

When the current object is empty, that means current object is useless.

Returns
  true means current object is empty, while false means not.

## ◆ saveAs() [1/2]

boolean com.foxit.sdk.common.Image.saveAs | ( | StreamCallback | file,
|  | String | file_extension
| ) |  | throws com.foxit.sdk.PDFException

Save current image as an image file.

If the type of current image is com.foxit.sdk.common.Image.e_TIF , com.foxit.sdk.common.Image.e_GIF or com.foxit.sdk.common.Image.e_None , and the saved image file type does not support multiply frames, only the first frame of current image will be saved to the image file.
If the type of the saved image file is com.foxit.sdk.common.Image.e_WEBP , the bitmap format of the current image should be com.foxit.sdk.common.Bitmap.e_DIBRgb , or .
For an image object (not constructed from any image file), please ensure to add at least one valid frame bitmap to the image object before using this function; otherwise this function will fail.

Parameters

  [in] | file | A com.foxit.sdk.common.fxcrt.StreamCallback object which is implemented by user to save image file.
  [in] | file_extension | A full path of the saved image file. It should not be an empty string. Currently, this function supports following extension names: .bmp, .jpg, .jpeg, .png, .tif, .tiff, .jpx, .jp2.

Returns
  true means success, while false means failure.

Note
  This function does not support to save current image object just back to the image file which is used to construct current image object. In order to do so, user is recommended to do as following steps:
  Assume that current image object is constructed from an image file named "org.bmp".
  1. Use current function to save current image object to an temporary file. Here, this temporary file is named as "temp.tmp".
  2. Ensure that current image object has destructed.
  3. Remove "org.bmp" and rename "temp.tmp" to "org.bmp".

## ◆ saveAs() [2/2]

boolean com.foxit.sdk.common.Image.saveAs | ( | String | file_path | ) | throws com.foxit.sdk.PDFException

Save current image as an image file.

If the type of current image is com.foxit.sdk.common.Image.e_TIF , com.foxit.sdk.common.Image.e_GIF or com.foxit.sdk.common.Image.e_None , and the saved image file type does not support multiply frames, only the first frame of current image will be saved to the image file.
If the type of the saved image file is com.foxit.sdk.common.Image.e_WEBP , the bitmap format of the current image should be com.foxit.sdk.common.Bitmap.e_DIBRgb , or .
For an image object (not constructed from any image file), please ensure to add at least one valid frame bitmap to the image object before using this function; otherwise this function will fail.

Parameters

  [in] | file_path | A full path of the saved image file. It should not be an empty string. Currently, this function supports following extension names: .bmp, .jpg, .jpeg, .png, .tif, .tiff, .jpx, .jp2.

Returns
  true means success, while false means failure.

Note
  This function does not support to save current image object just back to the image file which is used to construct current image object. In order to do so, user is recommended to do as following steps:
  Assume that current image object is constructed from an image file named "org.bmp".
  1. Use current function to save current image object to an temporary file. Here, this temporary file is named as "temp.tmp".
  2. Ensure that current image object has destructed.
  3. Remove "org.bmp" and rename "temp.tmp" to "org.bmp".

## ◆ setDPIs()

void com.foxit.sdk.common.Image.setDPIs | ( | int | x_dpi,
|  | int | y_dpi
| ) |  | throws com.foxit.sdk.PDFException

Set DPI for X-axis and Y-axis.

Currently, this function does not support an image with type com.foxit.sdk.common.Image.e_JPX , com.foxit.sdk.common.Image.e_GIF , com.foxit.sdk.common.Image.e_JBIG2 or com.foxit.sdk.common.Image.e_WEBP .

Parameters

  [in] | x_dpi | DPI for X-axis. It should be above 0.
  [in] | y_dpi | DPI for Y-axis. It should be above 0.

Returns
  None.

## Member Data Documentation

## ◆ e_JBIG2

final int com.foxit.sdk.common.Image.e_JBIG2 = 8
| static

Image type is JBIG2.

Note
  Currently, only few functions in class Image support this type.

## ◆ e_None

final int com.foxit.sdk.common.Image.e_None = 0
| static

Not have image type yet.

Note
  This is only for a new image object, which is not constructed from any image file or retrieved from other object.

## ◆ e_WEBP

final int com.foxit.sdk.common.Image.e_WEBP = 9
| static

Image type is webp.

Note
  Currently, unsupported on Android, iOS, linux arm and mac arm platforms.