Resize an image resource in CQ5

Question

I am trying to resize a given JCR image resource and store it as a new rendition. The use case is to generate thumbnails in "any" scale.

I wanted to use the com.day.cq.dam.core.process.CreateThumbnailProcess, but this it is not available in the project, i am working on.

damoeb · Accepted Answer · 2014-12-04T11:49:04.363

I found a quite low level approach, to resize an image identified by jcrPathToImage to int targetWidth and int targetHeight.

Resize Image

Resource resource = getResourceResolver().getResource(jcrPathToImage);
Asset asset = resource.adaptTo(Asset.class);
Layer layer = new Layer(asset.getOriginal().getStream())
layer.resize(targetWidth, targetHeight);

Create new rendition in JCR

Extract mime type of the original image

Image image = new Image(resource);
String mimeType = image.getMimeType();

Store the resized Image using its asset representation.

ByteArrayOutputStream bout = null;
ByteArrayInputStream bin = null;

try {
    bout = new ByteArrayOutputStream(2048);
    layer.write(mimeType, 1, bout);

    bin = new ByteArrayInputStream(bout.toByteArray());

    asset.addRendition(resizedImgName, bin, mimeType);

} finally {
    // close streams ...               
}

score 1 · Answer 2 · answered Feb 21 '13 at 06:06

you can configure the DAM Update Asset workflow to give the renditions you want to get created

http://localhost:4502/etc/workflow/models/dam/update_asset.html

in this workflow model select the thumbnail creation step and in the process tab of that step you can add your custom thumbnail values

[140:100],[48:48],[319:319],[90,90]

Resize an image resource in CQ5

2 Answers2