auto import from //depot/cupcake/@135843
diff --git a/core/java/android/view/SurfaceHolder.java b/core/java/android/view/SurfaceHolder.java
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+++ b/core/java/android/view/SurfaceHolder.java
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+/*
+ * Copyright (C) 2006 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.view;
+
+import android.graphics.Canvas;
+import android.graphics.Rect;
+import static android.view.WindowManager.LayoutParams.MEMORY_TYPE_NORMAL;
+import static android.view.WindowManager.LayoutParams.MEMORY_TYPE_HARDWARE;
+import static android.view.WindowManager.LayoutParams.MEMORY_TYPE_GPU;
+import static android.view.WindowManager.LayoutParams.MEMORY_TYPE_PUSH_BUFFERS;
+
+/**
+ * Abstract interface to someone holding a display surface. Allows you to
+ * control the surface size and format, edit the pixels in the surface, and
+ * monitor changes to the surface. This interface is typically available
+ * through the {@link SurfaceView} class.
+ *
+ * <p>When using this interface from a thread different than the one running
+ * its {@link SurfaceView}, you will want to carefully read the
+ * {@link #lockCanvas} and {@link Callback#surfaceCreated Callback.surfaceCreated}.
+ */
+public interface SurfaceHolder {
+ /**
+ * Surface type.
+ *
+ * @see #SURFACE_TYPE_NORMAL
+ * @see #SURFACE_TYPE_HARDWARE
+ * @see #SURFACE_TYPE_GPU
+ * @see #SURFACE_TYPE_PUSH_BUFFERS
+ */
+
+ /** Surface type: creates a regular surface, usually in main, non
+ * contiguous, cached/buffered RAM. */
+ public static final int SURFACE_TYPE_NORMAL = MEMORY_TYPE_NORMAL;
+ /** Surface type: creates a suited to be used with DMA engines and
+ * hardware accelerators. */
+ public static final int SURFACE_TYPE_HARDWARE = MEMORY_TYPE_HARDWARE;
+ /** Surface type: creates a surface suited to be used with the GPU */
+ public static final int SURFACE_TYPE_GPU = MEMORY_TYPE_GPU;
+ /** Surface type: creates a "push" surface, that is a surface that
+ * doesn't owns its buffers. With such a surface lockCanvas will fail. */
+ public static final int SURFACE_TYPE_PUSH_BUFFERS = MEMORY_TYPE_PUSH_BUFFERS;
+
+ /**
+ * Exception that is thrown from {@link #lockCanvas} when called on a Surface
+ * whose is SURFACE_TYPE_PUSH_BUFFERS.
+ */
+ public static class BadSurfaceTypeException extends RuntimeException {
+ public BadSurfaceTypeException() {
+ }
+
+ public BadSurfaceTypeException(String name) {
+ super(name);
+ }
+ }
+
+ /**
+ * A client may implement this interface to receive information about
+ * changes to the surface. When used with a {@link SurfaceView}, the
+ * Surface being held is only available between calls to
+ * {@link #surfaceCreated(SurfaceHolder)} and
+ * {@link #surfaceDestroyed(SurfaceHolder). The Callback is set with
+ * {@link SurfaceHolder#addCallback SurfaceHolder.addCallback} method.
+ */
+ public interface Callback {
+ /**
+ * This is called immediately after the surface is first created.
+ * Implementations of this should start up whatever rendering code
+ * they desire. Note that only one thread can ever draw into
+ * a {@link Surface}, so you should not draw into the Surface here
+ * if your normal rendering will be in another thread.
+ *
+ * @param holder The SurfaceHolder whose surface is being created.
+ */
+ public void surfaceCreated(SurfaceHolder holder);
+
+ /**
+ * This is called immediately after any structural changes (format or
+ * size) have been made to the surface. You should at this point update
+ * the imagery in the surface. This method is always called at least
+ * once, after {@link #surfaceCreated}.
+ *
+ * @param holder The SurfaceHolder whose surface has changed.
+ * @param format The new PixelFormat of the surface.
+ * @param width The new width of the surface.
+ * @param height The new height of the surface.
+ */
+ public void surfaceChanged(SurfaceHolder holder, int format, int width,
+ int height);
+
+ /**
+ * This is called immediately before a surface is being destroyed. After
+ * returning from this call, you should no longer try to access this
+ * surface. If you have a rendering thread that directly accesses
+ * the surface, you must ensure that thread is no longer touching the
+ * Surface before returning from this function.
+ *
+ * @param holder The SurfaceHolder whose surface is being destroyed.
+ */
+ public void surfaceDestroyed(SurfaceHolder holder);
+ }
+
+ /**
+ * Add a Callback interface for this holder. There can several Callback
+ * interfaces associated to a holder.
+ *
+ * @param callback The new Callback interface.
+ */
+ public void addCallback(Callback callback);
+
+ /**
+ * Removes a previously added Callback interface from this holder.
+ *
+ * @param callback The Callback interface to remove.
+ */
+ public void removeCallback(Callback callback);
+
+ /**
+ * Use this method to find out if the surface is in the process of being
+ * created from Callback methods. This is intended to be used with
+ * {@link Callback#surfaceChanged}.
+ *
+ * @return true if the surface is in the process of being created.
+ */
+ public boolean isCreating();
+
+ /**
+ * Sets the surface's type. Surfaces intended to be used with OpenGL ES
+ * should be of SURFACE_TYPE_GPU, surfaces accessed by DMA engines and
+ * hardware accelerators should be of type SURFACE_TYPE_HARDWARE.
+ * Failing to set the surface's type appropriately could result in
+ * degraded performance or failure.
+ *
+ * @param type The surface's memory type.
+ */
+ public void setType(int type);
+
+ /**
+ * Make the surface a fixed size. It will never change from this size.
+ * When working with a {link SurfaceView}, this must be called from the
+ * same thread running the SurfaceView's window.
+ *
+ * @param width The surface's width.
+ * @param height The surface's height.
+ */
+ public void setFixedSize(int width, int height);
+
+ /**
+ * Allow the surface to resized based on layout of its container (this is
+ * the default). When this is enabled, you should monitor
+ * {@link Callback#surfaceChanged} for changes to the size of the surface.
+ * When working with a {link SurfaceView}, this must be called from the
+ * same thread running the SurfaceView's window.
+ */
+ public void setSizeFromLayout();
+
+ /**
+ * Set the desired PixelFormat of the surface. The default is OPAQUE.
+ * When working with a {link SurfaceView}, this must be called from the
+ * same thread running the SurfaceView's window.
+ *
+ * @param format A constant from PixelFormat.
+ *
+ * @see android.graphics.PixelFormat
+ */
+ public void setFormat(int format);
+
+ /**
+ * Enable or disable option to keep the screen turned on while this
+ * surface is displayed. The default is false, allowing it to turn off.
+ * Enabling the option effectivelty.
+ * This is safe to call from any thread.
+ *
+ * @param screenOn Supply to true to force the screen to stay on, false
+ * to allow it to turn off.
+ */
+ public void setKeepScreenOn(boolean screenOn);
+
+ /**
+ * Start editing the pixels in the surface. The returned Canvas can be used
+ * to draw into the surface's bitmap. A null is returned if the surface has
+ * not been created or otherwise can not be edited. You will usually need
+ * to implement {@link Callback#surfaceCreated Callback.surfaceCreated}
+ * to find out when the Surface is available for use.
+ *
+ * <p>The content of the Surface is never preserved between unlockCanvas() and
+ * lockCanvas(), for this reason, every pixel within the Surface area
+ * must be written. The only exception to this rule is when a dirty
+ * rectangle is specified, in which case, non dirty pixels will be
+ * preserved.
+ *
+ * <p>If you call this repeatedly when the Surface is not ready (before
+ * {@link Callback#surfaceCreated Callback.surfaceCreated} or after
+ * {@link Callback#surfaceDestroyed Callback.surfaceDestroyed}), your calls
+ * will be throttled to a slow rate in order to avoid consuming CPU.
+ *
+ * <p>If null is not returned, this function internally holds a lock until
+ * the corresponding {@link #unlockCanvasAndPost} call, preventing
+ * {@link SurfaceView} from creating, destroying, or modifying the surface
+ * while it is being drawn. This can be more convenience than accessing
+ * the Surface directly, as you do not need to do special synchronization
+ * with a drawing thread in {@link Callback#surfaceDestroyed
+ * Callback.surfaceDestroyed}.
+ *
+ * @return Canvas Use to draw into the surface.
+ */
+ public Canvas lockCanvas();
+
+
+ /**
+ * Just like {@link #lockCanvas()} but allows to specify a dirty rectangle.
+ * Every
+ * pixel within that rectangle must be written; however pixels outside
+ * the dirty rectangle will be preserved by the next call to lockCanvas().
+ *
+ * @see android.view.SurfaceHolder#lockCanvas
+ *
+ * @param dirty Area of the Surface that will be modified.
+ * @return Canvas Use to draw into the surface.
+ */
+ public Canvas lockCanvas(Rect dirty);
+
+ /**
+ * Finish editing pixels in the surface. After this call, the surface's
+ * current pixels will be shown on the screen, but its content is lost,
+ * in particular there is no guarantee that the content of the Surface
+ * will remain unchanged when lockCanvas() is called again.
+ *
+ * @see #lockCanvas()
+ *
+ * @param canvas The Canvas previously returned by lockCanvas().
+ */
+ public void unlockCanvasAndPost(Canvas canvas);
+
+ /**
+ * Retrieve the current size of the surface. Note: do not modify the
+ * returned Rect. This is only safe to call from the thread of
+ * {@link SurfaceView}'s window, or while inside of
+ * {@link #lockCanvas()}.
+ *
+ * @return Rect The surface's dimensions. The left and top are always 0.
+ */
+ public Rect getSurfaceFrame();
+
+ /**
+ * Direct access to the surface object. The Surface may not always be
+ * available -- for example when using a {@link SurfaceView} the holder's
+ * Surface is not created until the view has been attached to the window
+ * manager and performed a layout in order to determine the dimensions
+ * and screen position of the Surface. You will thus usually need
+ * to implement {@link Callback#surfaceCreated Callback.surfaceCreated}
+ * to find out when the Surface is available for use.
+ *
+ * <p>Note that if you directly access the Surface from another thread,
+ * it is critical that you correctly implement
+ * {@link Callback#surfaceCreated Callback.surfaceCreated} and
+ * {@link Callback#surfaceDestroyed Callback.surfaceDestroyed} to ensure
+ * that thread only accesses the Surface while it is valid, and that the
+ * Surface does not get destroyed while the thread is using it.
+ *
+ * <p>This method is intended to be used by frameworks which often need
+ * direct access to the Surface object (usually to pass it to native code).
+ * When designing APIs always use SurfaceHolder to pass surfaces around
+ * as opposed to the Surface object itself. A rule of thumb is that
+ * application code should never have to call this method.
+ *
+ * @return Surface The surface.
+ */
+ public Surface getSurface();
+}