content: /*
   * Copyright (C) 2011 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.annotation.Nullable;
  import android.graphics.Bitmap;
  import android.graphics.HardwareRenderer;
  import android.graphics.Matrix;
  import android.graphics.Paint;
  import android.graphics.SurfaceTexture;
  
  import com.android.internal.util.VirtualRefBasePtr;
  
  /**
   * TextureLayer represents a SurfaceTexture that will be composited by RenderThread into the
   * frame when drawn in a HW accelerated Canvas. This is backed by a DeferredLayerUpdater on
   * the native side.
   *
   * @hide
   */
  public final class TextureLayer {
      private HardwareRenderer mRenderer;
      private VirtualRefBasePtr mFinalizer;
  
      private TextureLayer(HardwareRenderer renderer, long deferredUpdater) {
          if (renderer == null || deferredUpdater == 0) {
              throw new IllegalArgumentException("Either hardware renderer: " + renderer
                      + " or deferredUpdater: " + deferredUpdater + " is invalid");
          }
          mRenderer = renderer;
          mFinalizer = new VirtualRefBasePtr(deferredUpdater);
      }
  
      /**
       * Update the paint used when drawing this layer.
       *
       * @param paint The paint used when the layer is drawn into the destination canvas.
       * @see View#setLayerPaint(android.graphics.Paint)
       */
      public void setLayerPaint(@Nullable Paint paint) {
          nSetLayerPaint(mFinalizer.get(), paint != null ? paint.getNativeInstance() : 0);
          mRenderer.pushLayerUpdate(this);
      }
  
      /**
       * Indicates whether this layer can be rendered.
       *
       * @return True if the layer can be rendered into, false otherwise
       */
      public boolean isValid() {
          return mFinalizer != null && mFinalizer.get() != 0;
      }
  
      /**
       * Destroys resources without waiting for a GC.
       */
      public void destroy() {
          if (!isValid()) {
              // Already destroyed
              return;
          }
          mRenderer.onLayerDestroyed(this);
          mRenderer = null;
          mFinalizer.release();
          mFinalizer = null;
      }
  
      public long getDeferredLayerUpdater() {
          return mFinalizer.get();
      }
  
      /**
       * Copies this layer into the specified bitmap.
       *
       * @param bitmap The bitmap to copy they layer into
       *
       * @return True if the copy was successful, false otherwise
       */
      public boolean copyInto(Bitmap bitmap) {
          return mRenderer.copyLayerInto(this, bitmap);
      }
  
      /**
       * Update the layer's properties. Note that after calling this isValid() may
       * return false if the requested width/height cannot be satisfied
       *
       * @param width The new width of this layer
       * @param height The new height of this layer
       * @param isOpaque Whether this layer is opaque
       *
       * @return true if the layer's properties will change, false if they already
       *         match the desired values.
       */
      public boolean prepare(int width, int height, boolean isOpaque) {
          return nPrepare(mFinalizer.get(), width, height, isOpaque);
      }
  
      /**
       * Sets an optional transform on this layer.
       *
       * @param matrix The transform to apply to the layer.
       */
      public void setTransform(Matrix matrix) {
          nSetTransform(mFinalizer.get(), matrix.native_instance);
          mRenderer.pushLayerUpdate(this);
      }
  
      /**
       * Indicates that this layer has lost its texture.
       */
      public void detachSurfaceTexture() {
          mRenderer.detachSurfaceTexture(mFinalizer.get());
      }
  
      public long getLayerHandle() {
          return mFinalizer.get();
      }
  
      public void setSurfaceTexture(SurfaceTexture surface) {
          nSetSurfaceTexture(mFinalizer.get(), surface);
          mRenderer.pushLayerUpdate(this);
      }
  
      public void updateSurfaceTexture() {
          nUpdateSurfaceTexture(mFinalizer.get());
          mRenderer.pushLayerUpdate(this);
      }
  
      /** @hide */
      public static TextureLayer adoptTextureLayer(HardwareRenderer renderer, long layer) {
          return new TextureLayer(renderer, layer);
      }
  
      private static native boolean nPrepare(long layerUpdater, int width, int height,
              boolean isOpaque);
      private static native void nSetLayerPaint(long layerUpdater, long paint);
      private static native void nSetTransform(long layerUpdater, long matrix);
      private static native void nSetSurfaceTexture(long layerUpdater, SurfaceTexture surface);
      private static native void nUpdateSurfaceTexture(long layerUpdater);
  }
  