Using a source region with an image that has exif orientation should effectively crop the region where specified after the orientation has been applied.
Actual behaviorThe output image has the wrong area of the source image.
Steps to reproduce the behaviorUsing a source image that has exif orientation (in this case it was top right orientated) use the following code to read the image from inputStream and write to outputStream:
Thumbnails
.of(inputStream)
.useExifOrientation(true)
.size(256, 256)
.sourceRegion(cropX, cropY, cropWidth, cropHeight)
.outputFormat("JPEG")
.outputQuality(1)
.toOutputStream(outputStream);
This will produce an incorrect result.
Looking at the code during the readImage method of InputStreamImageSource it adds a filter to work with the orientation. However, it then calculates the source region a bit further down before any filters are run and is using the original width and height. I'm assuming this maybe why it doesn't correctly produce the cropped image.
My current workaround for this is to first create a BufferedImage to correct the orientation, and then create the cropped version from this BufferedImage as follows:
BufferedImage img = Thumbnails
.of(inputStream)
.scale(1)
.useExifOrientation(true)
.outputFormat("JPEG")
.outputQuality(1)
.asBufferedImage();
Thumbnails
.of(img)
.size(256, 256)
.sourceRegion(cropX, cropY, cropWidth, cropHeight)
.outputFormat("JPEG")
.outputQuality(1)
.toOutputStream(outputStream); Environment
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4