ImageRenderUtils (Atlassian Confluence 8.8.0 API)

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

All Methods Static Methods Concrete Methods
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, 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(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,
                                    javax.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