| /* |
| * 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.graphics.Bitmap; |
| import android.graphics.Matrix; |
| import android.graphics.Paint; |
| import android.graphics.SurfaceTexture; |
| |
| import com.android.internal.util.VirtualRefBasePtr; |
| |
| /** |
| * A hardware layer can be used to render graphics operations into a hardware |
| * friendly buffer. For instance, with an OpenGL backend a hardware layer |
| * would use a Frame Buffer Object (FBO.) The hardware layer can be used as |
| * a drawing cache when a complex set of graphics operations needs to be |
| * drawn several times. |
| * |
| * @hide |
| */ |
| final class HardwareLayer { |
| private HardwareRenderer mRenderer; |
| private VirtualRefBasePtr mFinalizer; |
| |
| private HardwareLayer(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(Paint paint) { |
| nSetLayerPaint(mFinalizer.get(), paint.getNativeInstance()); |
| 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, false); |
| mRenderer.pushLayerUpdate(this); |
| } |
| |
| public void updateSurfaceTexture() { |
| nUpdateSurfaceTexture(mFinalizer.get()); |
| mRenderer.pushLayerUpdate(this); |
| } |
| |
| static HardwareLayer adoptTextureLayer(HardwareRenderer renderer, long layer) { |
| return new HardwareLayer(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, boolean isAlreadyAttached); |
| private static native void nUpdateSurfaceTexture(long layerUpdater); |
| } |