Package org.apache.pdfbox.util
Class ImageIOUtil
- java.lang.Object
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- org.apache.pdfbox.util.ImageIOUtil
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public class ImageIOUtil extends java.lang.Object
Handles some ImageIO operations.
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Field Summary
Fields Modifier and Type Field Description static float
DEFAULT_COMPRESSION_QUALITY
Default compression quality: 1.0f.static int
DEFAULT_SCREEN_RESOLUTION
Default screen resolution: 72dpi.
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Method Summary
All Methods Static Methods Concrete Methods Deprecated Methods Modifier and Type Method Description static boolean
writeImage(java.awt.image.BufferedImage image, java.lang.String filename, int dpi)
Writes a buffered image to a file using the given image format.static boolean
writeImage(java.awt.image.BufferedImage image, java.lang.String formatName, java.io.OutputStream output)
Writes a buffered image to a file using the given image format.static boolean
writeImage(java.awt.image.BufferedImage image, java.lang.String formatName, java.io.OutputStream output, int dpi)
Writes a buffered image to a file using the given image format.static boolean
writeImage(java.awt.image.BufferedImage image, java.lang.String formatName, java.io.OutputStream output, int dpi, float quality)
Writes a buffered image to a file using the given image format.static boolean
writeImage(java.awt.image.BufferedImage image, java.lang.String formatName, java.lang.String filename, int dpi)
Deprecated.usewriteImage(BufferedImage image, String filename, int dpi)
, which uses the full filename instead of just the prefix.
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Field Detail
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DEFAULT_SCREEN_RESOLUTION
public static final int DEFAULT_SCREEN_RESOLUTION
Default screen resolution: 72dpi.- See Also:
- Constant Field Values
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DEFAULT_COMPRESSION_QUALITY
public static final float DEFAULT_COMPRESSION_QUALITY
Default compression quality: 1.0f.- See Also:
- Constant Field Values
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Method Detail
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writeImage
public static boolean writeImage(java.awt.image.BufferedImage image, java.lang.String filename, int dpi) throws java.io.IOException
Writes a buffered image to a file using the given image format. SeewriteImage(BufferedImage image, String formatName, OutputStream output, int dpi, float quality)
for more details.- Parameters:
image
- the image to be writtenfilename
- used to construct the filename for the individual image. Its suffix will be used as the image format.dpi
- the resolution in dpi (dots per inch)- Returns:
- true if the image file was produced, false if there was an error.
- Throws:
java.io.IOException
- if an I/O error occurs
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writeImage
@Deprecated public static boolean writeImage(java.awt.image.BufferedImage image, java.lang.String formatName, java.lang.String filename, int dpi) throws java.io.IOException
Deprecated.usewriteImage(BufferedImage image, String filename, int dpi)
, which uses the full filename instead of just the prefix.Writes a buffered image to a file using the given image format. SeewriteImage(BufferedImage image, String formatName, OutputStream output, int dpi, float quality)
for more details.- Parameters:
image
- the image to be writtenformatName
- the target format (ex. "png") which is also the suffix for the filenamefilename
- used to construct the filename for the individual image. The formatName parameter will be used as the suffix.dpi
- the resolution in dpi (dots per inch)- Returns:
- true if the image file was produced, false if there was an error.
- Throws:
java.io.IOException
- if an I/O error occurs
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writeImage
public static boolean writeImage(java.awt.image.BufferedImage image, java.lang.String formatName, java.io.OutputStream output) throws java.io.IOException
Writes a buffered image to a file using the given image format. SeewriteImage(BufferedImage image, String formatName, OutputStream output, int dpi, float quality)
for more details.- Parameters:
image
- the image to be writtenformatName
- the target format (ex. "png")output
- the output stream to be used for writing- Returns:
- true if the image file was produced, false if there was an error.
- Throws:
java.io.IOException
- if an I/O error occurs
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writeImage
public static boolean writeImage(java.awt.image.BufferedImage image, java.lang.String formatName, java.io.OutputStream output, int dpi) throws java.io.IOException
Writes a buffered image to a file using the given image format. SeewriteImage(BufferedImage image, String formatName, OutputStream output, int dpi, float quality)
for more details.- Parameters:
image
- the image to be writtenformatName
- the target format (ex. "png")output
- the output stream to be used for writingdpi
- resolution to be used when writing the image- Returns:
- true if the image file was produced, false if there was an error.
- Throws:
java.io.IOException
- if an I/O error occurs
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writeImage
public static boolean writeImage(java.awt.image.BufferedImage image, java.lang.String formatName, java.io.OutputStream output, int dpi, float quality) throws java.io.IOException
Writes a buffered image to a file using the given image format. Compression is fixed for PNG, GIF, BMP and WBMP, dependent of the quality parameter for JPG, and dependent of bit count for TIFF (a bitonal image will be compressed with CCITT G4, a color image with LZW). Creating a TIFF image is only supported if the jai_imageio library is in the class path.- Parameters:
image
- the image to be writtenformatName
- the target format (ex. "png")output
- the output stream to be used for writingdpi
- resolution to be used when writing the imagequality
- quality to be used when compressing the image (0 < quality < 1.0f)- Returns:
- true if the image file was produced, false if there was an error.
- Throws:
java.io.IOException
- if an I/O error occurs
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