Example 1 with ImagesService
use of com.google.appengine.api.images.ImagesService in project java-docs-samples by GoogleCloudPlatform.
the class ImagesServlet method doGet.
// [END gcs]
@Override
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
// [START original_image]
// Read the image.jpg resource into a ByteBuffer.
FileInputStream fileInputStream = new FileInputStream(new File("WEB-INF/image.jpg"));
FileChannel fileChannel = fileInputStream.getChannel();
ByteBuffer byteBuffer = ByteBuffer.allocate((int) fileChannel.size());
fileChannel.read(byteBuffer);
byte[] imageBytes = byteBuffer.array();
// Write the original image to Cloud Storage
gcsService.createOrReplace(new GcsFilename(bucket, "image.jpeg"), new GcsFileOptions.Builder().mimeType("image/jpeg").build(), ByteBuffer.wrap(imageBytes));
// [END original_image]
// [START resize]
// Get an instance of the imagesService we can use to transform images.
ImagesService imagesService = ImagesServiceFactory.getImagesService();
// Make an image directly from a byte array, and transform it.
Image image = ImagesServiceFactory.makeImage(imageBytes);
Transform resize = ImagesServiceFactory.makeResize(100, 50);
Image resizedImage = imagesService.applyTransform(resize, image);
// Write the transformed image back to a Cloud Storage object.
gcsService.createOrReplace(new GcsFilename(bucket, "resizedImage.jpeg"), new GcsFileOptions.Builder().mimeType("image/jpeg").build(), ByteBuffer.wrap(resizedImage.getImageData()));
// [END resize]
// [START rotate]
// Make an image from a Cloud Storage object, and transform it.
BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
BlobKey blobKey = blobstoreService.createGsBlobKey("/gs/" + bucket + "/image.jpeg");
Image blobImage = ImagesServiceFactory.makeImageFromBlob(blobKey);
Transform rotate = ImagesServiceFactory.makeRotate(90);
Image rotatedImage = imagesService.applyTransform(rotate, blobImage);
// Write the transformed image back to a Cloud Storage object.
gcsService.createOrReplace(new GcsFilename(bucket, "rotatedImage.jpeg"), new GcsFileOptions.Builder().mimeType("image/jpeg").build(), ByteBuffer.wrap(rotatedImage.getImageData()));
// [END rotate]
// Output some simple HTML to display the images we wrote to Cloud Storage
// in the browser.
PrintWriter out = resp.getWriter();
out.println("<html><body>\n");
out.println("<img src='//storage.cloud.google.com/" + bucket + "/image.jpeg' alt='AppEngine logo' />");
out.println("<img src='//storage.cloud.google.com/" + bucket + "/resizedImage.jpeg' alt='AppEngine logo resized' />");
out.println("<img src='//storage.cloud.google.com/" + bucket + "/rotatedImage.jpeg' alt='AppEngine logo rotated' />");
out.println("</body></html>\n");
}
Also used :
BlobstoreService(com.google.appengine.api.blobstore.BlobstoreService)
FileChannel(java.nio.channels.FileChannel)
ImagesService(com.google.appengine.api.images.ImagesService)
Image(com.google.appengine.api.images.Image)
ByteBuffer(java.nio.ByteBuffer)
FileInputStream(java.io.FileInputStream)
BlobKey(com.google.appengine.api.blobstore.BlobKey)
GcsFileOptions(com.google.appengine.tools.cloudstorage.GcsFileOptions)
Transform(com.google.appengine.api.images.Transform)
File(java.io.File)
GcsFilename(com.google.appengine.tools.cloudstorage.GcsFilename)
PrintWriter(java.io.PrintWriter)
Aggregations
BlobKey (com.google.appengine.api.blobstore.BlobKey)1
BlobstoreService (com.google.appengine.api.blobstore.BlobstoreService)1
Image (com.google.appengine.api.images.Image)1
ImagesService (com.google.appengine.api.images.ImagesService)1
Transform (com.google.appengine.api.images.Transform)1
GcsFileOptions (com.google.appengine.tools.cloudstorage.GcsFileOptions)1
GcsFilename (com.google.appengine.tools.cloudstorage.GcsFilename)1
File (java.io.File)1
FileInputStream (java.io.FileInputStream)1
PrintWriter (java.io.PrintWriter)1
ByteBuffer (java.nio.ByteBuffer)1
FileChannel (java.nio.channels.FileChannel)1
