Initial commit of the blimp/ folder and target

blimp/client/android/java/src/org/chromium/blimp/BlimpView.java

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.blimp;
+
+import android.content.Context;
+import android.graphics.Point;
+import android.os.Build;
+import android.util.AttributeSet;
+import android.view.Surface;
+import android.view.SurfaceHolder;
+import android.view.SurfaceView;
+import android.view.WindowManager;
+
+import org.chromium.base.annotations.JNINamespace;
+
+/**
+ * A {@link View} that will visually represent the Blimp rendered content.  This {@link View} starts
+ * a native compositor.
+ */
+@JNINamespace("blimp")
+public class BlimpView extends SurfaceView implements SurfaceHolder.Callback2 {
+    private long mNativeBlimpViewPtr;
+
+    /**
+     * Builds a new {@link BlimpView}.
+     * @param context A {@link Context} instance.
+     * @param attrs   An {@link AttributeSet} instance.
+     */
+    public BlimpView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+
+        setZOrderMediaOverlay(true);
+        setVisibility(GONE);
+    }
+
+    /**
+     * Starts up rendering for this {@link View}.  This will start up the native compositor and will
+     * display it's contents.
+     */
+    public void initializeRenderer() {
+        assert mNativeBlimpViewPtr == 0;
+
+        WindowManager windowManager =
+                (WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE);
+        Point displaySize = new Point();
+        windowManager.getDefaultDisplay().getSize(displaySize);
+        Point physicalSize = new Point();
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
+            windowManager.getDefaultDisplay().getRealSize(physicalSize);
+        }
+        // TODO(dtrainor): Change 1.f to dpToPx once native fully supports dp.
+        float compositorDensity = 1.f;
+        mNativeBlimpViewPtr = nativeInit(
+                physicalSize.x, physicalSize.y, displaySize.x, displaySize.y, compositorDensity);
+        getHolder().addCallback(this);
+        setVisibility(VISIBLE);
+    }
+
+    /**
+     * Stops rendering for this {@link View} and destroys all internal state.  This {@link View}
+     * should not be used after this.
+     */
+    public void destroyRenderer() {
+        getHolder().removeCallback(this);
+        if (mNativeBlimpViewPtr != 0) {
+            nativeDestroy(mNativeBlimpViewPtr);
+            mNativeBlimpViewPtr = 0;
+        }
+    }
+
+    /**
+     * Triggers a redraw of the native compositor, pushing a new frame.
+     */
+    public void setNeedsComposite() {
+        if (mNativeBlimpViewPtr == 0) return;
+        nativeSetNeedsComposite(mNativeBlimpViewPtr);
+    }
+
+    /**
+     * Toggles whether or not the native compositor draws to this {@link View} or not.
+     * @param visible Whether or not the compositor should draw or not.
+     */
+    public void setCompositorVisibility(boolean visible) {
+        if (mNativeBlimpViewPtr == 0) return;
+        nativeSetVisibility(mNativeBlimpViewPtr, visible);
+    }
+
+    // SurfaceHolder.Callback2 Implementation ------------------------------------------------------
+    @Override
+    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
+        if (mNativeBlimpViewPtr == 0) return;
+        nativeSurfaceChanged(mNativeBlimpViewPtr, format, width, height, holder.getSurface());
+    }
+
+    @Override
+    public void surfaceCreated(SurfaceHolder holder) {
+        if (mNativeBlimpViewPtr == 0) return;
+        nativeSurfaceCreated(mNativeBlimpViewPtr);
+    }
+
+    @Override
+    public void surfaceDestroyed(SurfaceHolder holder) {
+        if (mNativeBlimpViewPtr == 0) return;
+        nativeSurfaceDestroyed(mNativeBlimpViewPtr);
+    }
+
+    @Override
+    public void surfaceRedrawNeeded(SurfaceHolder holder) {}
+
+    // Native Methods ------------------------------------------------------------------------------
+    private native long nativeInit(int physicalWidth, int physicalHeight, int displayWidth,
+            int displayHeight, float dpToPixel);
+    private native void nativeDestroy(long nativeBlimpView);
+    private native void nativeSetNeedsComposite(long nativeBlimpView);
+    private native void nativeSurfaceChanged(
+            long nativeBlimpView, int format, int width, int height, Surface surface);
+    private native void nativeSurfaceCreated(long nativeBlimpView);
+    private native void nativeSurfaceDestroyed(long nativeBlimpView);
+    private native void nativeSetVisibility(long nativeBlimpView, boolean visible);
+}