Package com.atlassian.confluence.content.render.image

Class ImageRenderUtils

java.lang.Object

com.atlassian.confluence.content.render.image.ImageRenderUtils

public class ImageRenderUtils
extends Object

Convenient utility methods for rendering of images.

Since:

5.3

Constructor Summary

Constructors

Constructor	Description
ImageRenderUtils()

Method Summary

Modifier and Type	Method	Description
static ImageDimensions	dimensionsForImage(InputStream is)
static ImageDimensions	dimensionsForImage(ImageInputStream inputStream)	Helper class that uses an ImageReader to determine the width and height of an image.
static void	writePngToStream(BufferedImage image, jakarta.servlet.http.HttpServletResponse response)	Write the image (expected to be a PNG image) to the servlet output stream of the response.

Methods inherited from class java.lang.Object

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

Constructor Details

ImageRenderUtils

public ImageRenderUtils()

Method Details

dimensionsForImage

public static ImageDimensions dimensionsForImage(ImageInputStream inputStream)
                                          throws IOException

Helper class that uses an ImageReader to determine the width and height of an image.

Doesn't rasterize the whole image and works well even with very large images (e.g. 15,000 x 15,000 px).

Throws:

IOException

dimensionsForImage

public static ImageDimensions dimensionsForImage(InputStream is)
                                          throws IOException

Throws:

IOException

writePngToStream

public static void writePngToStream(BufferedImage image,
 jakarta.servlet.http.HttpServletResponse response)
                             throws IOException

Write the image (expected to be a PNG image) to the servlet output stream of the response.

This method will flush and close the servlet output stream.

Parameters:

image - The PNG that will be written to the servlet response

response - HttpServletResponse

Throws:

IOException - if the image cannot be written, or if it cannot be flushed.

See Also:

• Tomcat ImageIO Issues
• ResponseOutputStreamFilter