| /* |
| * Copyright (C) 2007 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.*; |
| import android.os.Parcelable; |
| import android.os.Parcel; |
| import android.util.Log; |
| |
| /** |
| * Handle on to a raw buffer that is being managed by the screen compositor. |
| */ |
| public class Surface implements Parcelable { |
| private static final String LOG_TAG = "Surface"; |
| |
| /* flags used in constructor (keep in sync with ISurfaceComposer.h) */ |
| |
| /** Surface is created hidden */ |
| public static final int HIDDEN = 0x00000004; |
| |
| /** The surface is to be used by hardware accelerators or DMA engines */ |
| public static final int HARDWARE = 0x00000010; |
| |
| /** Implies "HARDWARE", the surface is to be used by the GPU |
| * additionally the backbuffer is never preserved for these |
| * surfaces. */ |
| public static final int GPU = 0x00000028; |
| |
| /** The surface contains secure content, special measures will |
| * be taken to disallow the surface's content to be copied from |
| * another process. In particular, screenshots and VNC servers will |
| * be disabled, but other measures can take place, for instance the |
| * surface might not be hardware accelerated. */ |
| public static final int SECURE = 0x00000080; |
| |
| /** Creates a surface where color components are interpreted as |
| * "non pre-multiplied" by their alpha channel. Of course this flag is |
| * meaningless for surfaces without an alpha channel. By default |
| * surfaces are pre-multiplied, which means that each color component is |
| * already multiplied by its alpha value. In this case the blending |
| * equation used is: |
| * |
| * DEST = SRC + DEST * (1-SRC_ALPHA) |
| * |
| * By contrast, non pre-multiplied surfaces use the following equation: |
| * |
| * DEST = SRC * SRC_ALPHA * DEST * (1-SRC_ALPHA) |
| * |
| * pre-multiplied surfaces must always be used if transparent pixels are |
| * composited on top of each-other into the surface. A pre-multiplied |
| * surface can never lower the value of the alpha component of a given |
| * pixel. |
| * |
| * In some rare situations, a non pre-multiplied surface is preferable. |
| * |
| */ |
| public static final int NON_PREMULTIPLIED = 0x00000100; |
| |
| /** |
| * Creates a surface without a rendering buffer. Instead, the content |
| * of the surface must be pushed by an external entity. This is type |
| * of surface can be used for efficient camera preview or movie |
| * play back. |
| */ |
| public static final int PUSH_BUFFERS = 0x00000200; |
| |
| /** Creates a normal surface. This is the default */ |
| public static final int FX_SURFACE_NORMAL = 0x00000000; |
| |
| /** Creates a Blur surface. Everything behind this surface is blurred |
| * by some amount. The quality and refresh speed of the blur effect |
| * is not settable or guaranteed. |
| * It is an error to lock a Blur surface, since it doesn't have |
| * a backing store. |
| */ |
| public static final int FX_SURFACE_BLUR = 0x00010000; |
| |
| /** Creates a Dim surface. Everything behind this surface is dimmed |
| * by the amount specified in setAlpha(). |
| * It is an error to lock a Dim surface, since it doesn't have |
| * a backing store. |
| */ |
| public static final int FX_SURFACE_DIM = 0x00020000; |
| |
| /** Mask used for FX values above */ |
| public static final int FX_SURFACE_MASK = 0x000F0000; |
| |
| /* flags used with setFlags() (keep in sync with ISurfaceComposer.h) */ |
| |
| /** Hide the surface. Equivalent to calling hide() */ |
| public static final int SURFACE_HIDDEN = 0x01; |
| |
| /** Freeze the surface. Equivalent to calling freeze() */ |
| public static final int SURACE_FROZEN = 0x02; |
| |
| /** Enable dithering when compositing this surface */ |
| public static final int SURFACE_DITHER = 0x04; |
| |
| public static final int SURFACE_BLUR_FREEZE= 0x10; |
| |
| /* orientations for setOrientation() */ |
| public static final int ROTATION_0 = 0; |
| public static final int ROTATION_90 = 1; |
| public static final int ROTATION_180 = 2; |
| public static final int ROTATION_270 = 3; |
| |
| @SuppressWarnings("unused") |
| private int mSurface; |
| @SuppressWarnings("unused") |
| private int mSaveCount; |
| @SuppressWarnings("unused") |
| private Canvas mCanvas; |
| |
| /** |
| * Exception thrown when a surface couldn't be created or resized |
| */ |
| public static class OutOfResourcesException extends Exception { |
| public OutOfResourcesException() { |
| } |
| public OutOfResourcesException(String name) { |
| super(name); |
| } |
| } |
| |
| /* |
| * We use a class initializer to allow the native code to cache some |
| * field offsets. |
| */ |
| native private static void nativeClassInit(); |
| static { nativeClassInit(); } |
| |
| |
| /** |
| * create a surface |
| * {@hide} |
| */ |
| public Surface(SurfaceSession s, |
| int pid, int display, int w, int h, int format, int flags) |
| throws OutOfResourcesException { |
| mCanvas = new Canvas(); |
| init(s,pid,display,w,h,format,flags); |
| } |
| |
| /** |
| * Create an empty surface, which will later be filled in by |
| * readFromParcel(). |
| * {@hide} |
| */ |
| public Surface() { |
| mCanvas = new Canvas(); |
| } |
| |
| /** |
| * Copy another surface to this one. This surface now holds a reference |
| * to the same data as the original surface, and is -not- the owner. |
| * {@hide} |
| */ |
| public native void copyFrom(Surface o); |
| |
| /** |
| * Does this object hold a valid surface? Returns true if it holds |
| * a physical surface, so lockCanvas() will succeed. Otherwise |
| * returns false. |
| */ |
| public native boolean isValid(); |
| |
| /** Call this free the surface up. {@hide} */ |
| public native void clear(); |
| |
| /** draw into a surface */ |
| public Canvas lockCanvas(Rect dirty) throws OutOfResourcesException { |
| /* the dirty rectangle may be expanded to the surface's size, if |
| * for instance it has been resized or if the bits were lost, since |
| * the last call. |
| */ |
| return lockCanvasNative(dirty); |
| } |
| |
| private native Canvas lockCanvasNative(Rect dirty); |
| |
| /** unlock the surface and asks a page flip */ |
| public native void unlockCanvasAndPost(Canvas canvas); |
| |
| /** |
| * unlock the surface. the screen won't be updated until |
| * post() or postAll() is called |
| */ |
| public native void unlockCanvas(Canvas canvas); |
| |
| /** start/end a transaction {@hide} */ |
| public static native void openTransaction(); |
| /** {@hide} */ |
| public static native void closeTransaction(); |
| |
| /** |
| * Freezes the specified display, No updating of the screen will occur |
| * until unfreezeDisplay() is called. Everything else works as usual though, |
| * in particular transactions. |
| * @param display |
| * {@hide} |
| */ |
| public static native void freezeDisplay(int display); |
| |
| /** |
| * resume updating the specified display. |
| * @param display |
| * {@hide} |
| */ |
| public static native void unfreezeDisplay(int display); |
| |
| /** |
| * set the orientation of the given display. |
| * @param display |
| * @param orientation |
| */ |
| public static native void setOrientation(int display, int orientation); |
| |
| /** |
| * set surface parameters. |
| * needs to be inside open/closeTransaction block |
| */ |
| public native void setLayer(int zorder); |
| public native void setPosition(int x, int y); |
| public native void setSize(int w, int h); |
| |
| public native void hide(); |
| public native void show(); |
| public native void setTransparentRegionHint(Region region); |
| public native void setAlpha(float alpha); |
| public native void setMatrix(float dsdx, float dtdx, |
| float dsdy, float dtdy); |
| |
| public native void freeze(); |
| public native void unfreeze(); |
| |
| public native void setFreezeTint(int tint); |
| |
| public native void setFlags(int flags, int mask); |
| |
| @Override |
| public String toString() { |
| return "Surface(native-token=" + mSurface + ")"; |
| } |
| |
| private Surface(Parcel source) throws OutOfResourcesException { |
| init(source); |
| } |
| |
| public int describeContents() { |
| return 0; |
| } |
| |
| public native void readFromParcel(Parcel source); |
| public native void writeToParcel(Parcel dest, int flags); |
| |
| public static final Parcelable.Creator<Surface> CREATOR |
| = new Parcelable.Creator<Surface>() |
| { |
| public Surface createFromParcel(Parcel source) { |
| try { |
| return new Surface(source); |
| } catch (Exception e) { |
| Log.e(LOG_TAG, "Exception creating surface from parcel", e); |
| } |
| return null; |
| } |
| |
| public Surface[] newArray(int size) { |
| return new Surface[size]; |
| } |
| }; |
| |
| /* no user serviceable parts here ... */ |
| @Override |
| protected void finalize() throws Throwable { |
| clear(); |
| } |
| |
| private native void init(SurfaceSession s, |
| int pid, int display, int w, int h, int format, int flags) |
| throws OutOfResourcesException; |
| |
| private native void init(Parcel source); |
| } |
