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

java.lang.Object
  com.atlassian.confluence.content.render.image.ImageRenderUtils

public class ImageRenderUtils
extends java.lang.Object

Convenient utility methods for rendering of images.

Since:

v5.3

Constructor Summary

ImageRenderUtils()

Method Summary

static ImageDimensions	dimensionsForImage(javax.imageio.stream.ImageInputStream inputStream) Helper class that uses an ImageReader to determine the width and height of an image.
static ImageDimensions	dimensionsForImage(java.io.InputStream is)
static void	writePngToStream(java.awt.image.BufferedImage image, javax.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 Detail

ImageRenderUtils

public ImageRenderUtils()

Method Detail

dimensionsForImage

public static ImageDimensions dimensionsForImage(javax.imageio.stream.ImageInputStream inputStream)
                                          throws java.io.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:

java.io.IOException

dimensionsForImage

public static ImageDimensions dimensionsForImage(java.io.InputStream is)
                                          throws java.io.IOException

Throws:

java.io.IOException

writePngToStream

public static void writePngToStream(java.awt.image.BufferedImage image,
                                    javax.servlet.http.HttpServletResponse response)
                             throws java.io.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:

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

See Also:

Tomcat ImageIO Issues, ResponseOutputStreamFilter