Index: chrome/android/java/src/org/chromium/chrome/browser/photo_picker/DecoderServiceHost.java |
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/DecoderServiceHost.java b/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/DecoderServiceHost.java |
new file mode 100644 |
index 0000000000000000000000000000000000000000..1fa1640a51ed7e03058b7e6900a2c4aeb916877b |
--- /dev/null |
+++ b/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/DecoderServiceHost.java |
@@ -0,0 +1,99 @@ |
+// Copyright 2016 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+package org.chromium.chrome.browser.photo_picker; |
+ |
+import android.content.Context; |
+import android.graphics.Bitmap; |
+import android.graphics.Canvas; |
+import android.graphics.Color; |
+import android.graphics.Paint; |
+ |
+/** |
+ * A class to communicate with the decoder service. |
+ */ |
+public class DecoderServiceHost { |
+ /** |
+ * Interface for notifying clients of the service being ready. |
+ */ |
+ public interface ServiceReadyCallback { |
+ /** |
+ * A function to define to receive a notification once the service is up and running. |
+ */ |
+ void serviceReady(); |
+ } |
+ |
+ /** |
+ * An interface notifying clients when an image has finished decoding. |
+ */ |
+ public interface ImageDecodedCallback { |
+ /** |
+ * A function to define to receive a notification that an image has been decoded. |
+ * @param filePath The file path for the newly decoded image. |
+ * @param bitmap The results of the decoding (or placeholder image, if failed). |
+ */ |
+ void imageDecodedCallback(String filePath, Bitmap bitmap); |
+ } |
+ |
+ // The callback the client wants us to use to report back when the service is ready. |
+ private ServiceReadyCallback mCallback; |
+ |
+ /** |
+ * The DecoderServiceHost constructor. |
+ * @param callback The callback to use when communicating back to the client. |
+ */ |
+ public DecoderServiceHost(ServiceReadyCallback callback) { |
+ mCallback = callback; |
+ } |
+ |
+ /** |
+ * Initiate binding with the decoder service. |
+ * @param context The context to use. |
+ */ |
+ public void bind(Context context) { |
+ mCallback.serviceReady(); |
+ } |
+ |
+ /** |
+ * Unbind from the decoder service. |
+ * @param context The context to use. |
+ */ |
+ public void unbind(Context context) { |
+ // TODO(finnur): Implement. |
+ } |
+ |
+ /** |
+ * Accepts a request to decode a single image. |
+ * @param filePath The path to the file to decode. |
+ * @param width The requested width of the resulting bitmap. |
+ * @param callback The callback to use to communicate the decoding results. |
+ */ |
+ public void decodeImage(String filePath, int width, ImageDecodedCallback callback) { |
+ // TODO(finnur): Queue up and actually decode the image requested. |
+ callback.imageDecodedCallback(filePath, createPlaceholderBitmap(width, width)); |
+ } |
+ |
+ /** |
+ * Cancels a request to decode an image (if it hasn't already been dispatched). |
+ * @param filePath |
+ */ |
+ public void cancelDecodeImage(String filePath) { |
+ // TODO(finnur): Implement. |
+ } |
+ |
+ /** |
+ * Creates a placeholder bitmap, used when the server failed to decode the image. |
+ * @param width The requested width of the resulting bitmap. |
+ * @param height The requested height of the resulting bitmap. |
+ * @return Placeholder bitmap. |
+ */ |
+ private Bitmap createPlaceholderBitmap(int width, int height) { |
+ Bitmap placeholder = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); |
+ Canvas canvas = new Canvas(placeholder); |
+ Paint paint = new Paint(); |
+ paint.setColor(Color.GRAY); |
+ canvas.drawRect(0, 0, (float) width, (float) height, paint); |
+ return placeholder; |
+ } |
+} |