[Android] Composited selection handle rendering

ui/android/java/src/org/chromium/ui/gfx/BitmapHelper.java

 // Copyright 2012 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.ui.gfx;
 
 import android.content.res.Resources;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 
 import org.chromium.base.CalledByNative;
 import org.chromium.base.JNINamespace;
 
 /**
  * Helper class to decode and sample down bitmap resources.
  */
 @JNINamespace("gfx")
 public class BitmapHelper {
     @CalledByNative
     private static Bitmap createBitmap(int width,
                                       int height,
                                       int bitmapFormatValue) {
         Bitmap.Config bitmapConfig = getBitmapConfigForFormat(bitmapFormatValue);
         return Bitmap.createBitmap(width, height, bitmapConfig);
     }
 
     /**
+     * Decode a bitmap resource.
+     *
+     * @param name The resource name of the bitmap to decode.
+     * @return The corresponding bitmap.
+     */
+    @CalledByNative
+    private static Bitmap decodeDrawableResource(String name) {
+        Resources res = Resources.getSystem();
+        return decodeDrawableResource(res.getIdentifier(name, null, null));
+    }
+
+    /**
+     * Decode a bitmap resource.
+     *
+     * @param resId The resource id of the bitmap to decode.
+     * @return The corresponding bitmap.
+     */
+    @CalledByNative
+    private static Bitmap decodeDrawableResource(int resId) {
+        final BitmapFactory.Options options = new BitmapFactory.Options();
+        options.inJustDecodeBounds = false;
+        options.inPreferredConfig = Bitmap.Config.ARGB_8888;
+        return BitmapFactory.decodeResource(Resources.getSystem(), resId, options);
+    }
+
+    /**
      * Decode and sample down a bitmap resource to the requested width and height.
      *
      * @param name The resource name of the bitmap to decode.
      * @param reqWidth The requested width of the resulting bitmap.
      * @param reqHeight The requested height of the resulting bitmap.
      * @return A bitmap sampled down from the original with the same aspect ratio and dimensions.
      *         that are equal to or greater than the requested width and height.
      */
     @CalledByNative
-    private static Bitmap decodeDrawableResource(String name,
-                                                 int reqWidth,
-                                                 int reqHeight) {
+    private static Bitmap decodeAndDownsampleDrawableResource(String name,
+                                                              int reqWidth,
+                                                              int reqHeight) {
         Resources res = Resources.getSystem();
         int resId = res.getIdentifier(name, null, null);
         if (resId == 0) return null;
 
         final BitmapFactory.Options options = new BitmapFactory.Options();
         options.inJustDecodeBounds = true;
         BitmapFactory.decodeResource(res, resId, options);
 
         options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight);
         options.inJustDecodeBounds = false;
@@ skipping 61 matching lines @@
                 return Bitmap.Config.ARGB_4444;
             case BitmapFormat.FORMAT_RGB_565:
                 return Bitmap.Config.RGB_565;
             case BitmapFormat.FORMAT_ARGB_8888:
             default:
                 return Bitmap.Config.ARGB_8888;
         }
     }
 
 }