PngDevice
Inheritance: java.lang.Object, com.aspose.pdf.devices.Device, com.aspose.pdf.devices.PageDevice, com.aspose.pdf.devices.ImageDevice
public final class PngDevice extends ImageDevice
Represents image device that helps to save pdf document pages into png.
Constructors
| Constructor | Description |
|---|---|
| PngDevice() | Initializes a new instance of the PngDevice class with default resolution. |
| PngDevice(Resolution resolution) | Initializes a new instance of the PngDevice class. |
| PngDevice(int width, int height, Resolution resolution) | Initializes a new instance of the PngDevice class with provided image dimensions and resolution. |
| PngDevice(PageSize pageSize, Resolution resolution) | Initializes a new instance of the PngDevice class with provided page size and resolution. |
| PngDevice(int width, int height) | Initializes a new instance of the PngDevice class with provided image dimensions, default resolution (=150). |
| PngDevice(PageSize pageSize) | Initializes a new instance of the PngDevice class with provided page size, default resolution (=150). |
Methods
| Method | Description |
|---|---|
| isTransparentBackground() | Gets or sets if image has transparent background. |
| setTransparentBackground(boolean value) | Gets or sets if image has transparent background. |
| processInternal(Page page, System.IO.Stream output) | Converts the page into png and saves it in the output stream. |
| process(Page page, OutputStream output) | Converts the page into png and saves it in the output stream. |
| processToBufferedImage(Page page) | Converts the page into BufferedImage. |
| processToBufferedImageBinarized(Page page, double threshold) | Converts the page into BufferedImage with Bradley binarization. |
PngDevice()
public PngDevice()
Initializes a new instance of the PngDevice class with default resolution.
PngDevice(Resolution resolution)
public PngDevice(Resolution resolution)
Initializes a new instance of the PngDevice class.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| resolution | Resolution | Resolution for the result image file, see Resolution class. |
PngDevice(int width, int height, Resolution resolution)
public PngDevice(int width, int height, Resolution resolution)
Initializes a new instance of the PngDevice class with provided image dimensions and resolution.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| width | int | Image output width. |
| height | int | Image output height. |
| resolution | Resolution | Resolution for the result image file, see Resolution class. |
PngDevice(PageSize pageSize, Resolution resolution)
public PngDevice(PageSize pageSize, Resolution resolution)
Initializes a new instance of the PngDevice class with provided page size and resolution.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| pageSize | PageSize | Page size of the output image. |
| resolution | Resolution | Resolution for the result image file, see Resolution class. |
PngDevice(int width, int height)
public PngDevice(int width, int height)
Initializes a new instance of the PngDevice class with provided image dimensions, default resolution (=150).
Parameters:
| Parameter | Type | Description |
|---|---|---|
| width | int | Image output width. |
| height | int | Image output height. |
PngDevice(PageSize pageSize)
public PngDevice(PageSize pageSize)
Initializes a new instance of the PngDevice class with provided page size, default resolution (=150).
Parameters:
| Parameter | Type | Description |
|---|---|---|
| pageSize | PageSize | Page size of the output image. |
isTransparentBackground()
public final boolean isTransparentBackground()
Gets or sets if image has transparent background.
Returns: boolean - boolean value
setTransparentBackground(boolean value)
public final void setTransparentBackground(boolean value)
Gets or sets if image has transparent background.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| value | boolean | boolean value |
processInternal(Page page, System.IO.Stream output)
public void processInternal(Page page, System.IO.Stream output)
Converts the page into png and saves it in the output stream.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| page | Page | The page to convert. |
| output | com.aspose.ms.System.IO.Stream | Output stream with png image. |
process(Page page, OutputStream output)
public void process(Page page, OutputStream output)
Converts the page into png and saves it in the output stream.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| page | Page | The page to convert. |
| output | java.io.OutputStream | Output stream with png image. |
processToBufferedImage(Page page)
public BufferedImage processToBufferedImage(Page page)
Converts the page into BufferedImage.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| page | Page | The page to convert. |
Returns: java.awt.image.BufferedImage - BufferedImage Output BufferedImage image.
processToBufferedImageBinarized(Page page, double threshold)
public BufferedImage processToBufferedImageBinarized(Page page, double threshold)
Converts the page into BufferedImage with Bradley binarization.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| page | Page | The page to convert. |
| threshold | double | The threshold value between 0.0 and 1.0. |
Returns: java.awt.image.BufferedImage - BufferedImage Output BufferedImage image.
