1 files changed, 152 insertions, 0 deletions
diff --git a/android/view/TextureLayer.java b/android/view/TextureLayer.java
new file mode 100644
index 00000000..35a886fa
--- /dev/null
+++ b/android/view/TextureLayer.java
@@ -0,0 +1,152 @@
+/*
+ * 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.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
+ */
+final class TextureLayer {
+    private ThreadedRenderer mRenderer;
+    private VirtualRefBasePtr mFinalizer;
+
+    private TextureLayer(ThreadedRenderer 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);
+    }
+
+    static TextureLayer adoptTextureLayer(ThreadedRenderer 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);
+}