Barcode-Lib4J requires Java 9+

Package de.vwsoft.barcodelib4j.image

Java Class «BitmapImageIO» – PNG, JPG, BMP

java.lang.Object

de.vwsoft.barcodelib4j.image.BitmapImageIO

public class BitmapImageIO
extends Object

Provides static utility methods for writing raster graphics with a specified resolution.

The specified resolution is typically written to the header of an image file, allowing graphics software to determine the image's dimensions, such as in millimeters or inches. The formats currently supported are PNG, JPEG, and BMP.

Method Summary

Modifier and Type	Method	Description
static Point	getResolution(ImageReader imgReader)	Retreives the resolution of an image.
static void	writeBMP(RenderedImage img, OutputStream out, int dpiResX, int dpiResY)	Writes a rendered image in BMP format with the specified resolution.
static void	writeJPG(RenderedImage img, OutputStream out, int dpiResX, int dpiResY, float quality)	Writes a rendered image in JPEG format with the specified resolution and quality.
static void	writePNG(RenderedImage img, OutputStream out, int dpiResX, int dpiResY)	Writes a rendered image in PNG format with the specified resolution.
static void	writeTIFF(RenderedImage img, OutputStream out)	Writes a rendered image in the standard TIFF format with LZW compression.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

writePNG

public static void writePNG(RenderedImage img,
 OutputStream out,
 int dpiResX,
 int dpiResY)
                     throws IOException

Writes a rendered image in PNG format with the specified resolution.

Parameters:

img - the RenderedImage object to write

out - the OutputStream to write the image data to

dpiResX - the horizontal resolution in dots per inch (DPI)

dpiResY - the vertical resolution in dots per inch (DPI)

Throws:

IOException - if an I/O error occurs during writing

writeJPG

public static void writeJPG(RenderedImage img,
 OutputStream out,
 int dpiResX,
 int dpiResY,
 float quality)
                     throws IOException

Writes a rendered image in JPEG format with the specified resolution and quality.

Parameters:

img - the RenderedImage object to write

out - the OutputStream to write the image data to

dpiResX - the horizontal resolution in dots per inch (DPI)

dpiResY - the vertical resolution in dots per inch (DPI)

quality - the quality of the JPEG image (0.0f to 1.0f)

Throws:

IOException - if an I/O error occurs during writing

writeBMP

public static void writeBMP(RenderedImage img,
 OutputStream out,
 int dpiResX,
 int dpiResY)
                     throws IOException

Writes a rendered image in BMP format with the specified resolution.

Parameters:

img - the RenderedImage object to write

out - the OutputStream to write the image data to

dpiResX - the horizontal resolution in dots per inch (DPI)

dpiResY - the vertical resolution in dots per inch (DPI)

Throws:

IOException - if an I/O error occurs during writing

writeTIFF

public static void writeTIFF(RenderedImage img,
 OutputStream out)
                      throws IOException

Writes a rendered image in the standard TIFF format with LZW compression.

Parameters:

img - the RenderedImage object to write

out - the OutputStream to write the image data to

Throws:

IOException - if an I/O error occurs during writing

getResolution

public static Point getResolution(ImageReader imgReader)
                           throws IOException

Retreives the resolution of an image.

The formats currently supported are PNG, JPEG, and BMP.

Parameters:

imgReader - the ImageReader object used to read the image

Returns:

a Point object representing the resolution (in DPI) of the image

Throws:

IOException - if an I/O error occurs during reading