The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/mobile/android/base/gfx/VirtualLayer.java	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,36 @@
     1.4 +/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
     1.5 + * This Source Code Form is subject to the terms of the Mozilla Public
     1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.8 +
     1.9 +package org.mozilla.gecko.gfx;
    1.10 +
    1.11 +public class VirtualLayer extends Layer {
    1.12 +    public VirtualLayer(IntSize size) {
    1.13 +        super(size);
    1.14 +    }
    1.15 +
    1.16 +    @Override
    1.17 +    public void draw(RenderContext context) {
    1.18 +        // No-op.
    1.19 +    }
    1.20 +
    1.21 +    void setPositionAndResolution(int left, int top, int right, int bottom, float newResolution) {
    1.22 +        // This is an optimized version of the following code:
    1.23 +        // beginTransaction();
    1.24 +        // try {
    1.25 +        //     setPosition(new Rect(left, top, right, bottom));
    1.26 +        //     setResolution(newResolution);
    1.27 +        //     performUpdates(null);
    1.28 +        // } finally {
    1.29 +        //     endTransaction();
    1.30 +        // }
    1.31 +
    1.32 +        // it is safe to drop the transaction lock in this instance (i.e. for the
    1.33 +        // VirtualLayer that is just a shadow of what gecko is painting) because
    1.34 +        // the position and resolution of this layer are always touched on the compositor
    1.35 +        // thread, and therefore do not require synchronization.
    1.36 +        mPosition.set(left, top, right, bottom);
    1.37 +        mResolution = newResolution;
    1.38 +    }
    1.39 +}