Merge "Fix creating of app theme snapshots" into oc-dev

package com.android.server.wm;

import static android.app.ActivityManager.ENABLE_TASK_SNAPSHOTS;

import static android.graphics.GraphicBuffer.USAGE_HW_TEXTURE;

import static android.graphics.GraphicBuffer.USAGE_SW_READ_NEVER;

import static android.graphics.GraphicBuffer.USAGE_SW_WRITE_RARELY;

import static android.graphics.PixelFormat.RGBA_8888;

import static android.graphics.Bitmap.Config.ARGB_8888;

import static android.graphics.Bitmap.Config.HARDWARE;

import android.annotation.Nullable;

import android.app.ActivityManager;

import android.app.ActivityManager.StackId;

import android.app.ActivityManager.TaskSnapshot;

import android.graphics.Bitmap;

import android.graphics.Canvas;

import android.graphics.GraphicBuffer;

import android.graphics.Rect;

import com.android.server.wm.TaskSnapshotSurface.SystemBarBackgroundPainter;

import java.io.PrintWriter;

import java.util.function.Consumer;

/**

 * When an app token becomes invisible, we take a snapshot (bitmap) of the corresponding task and

        final int color = task.getTaskDescription().getBackgroundColor();

        final int statusBarColor = task.getTaskDescription().getStatusBarColor();

        final int navigationBarColor = task.getTaskDescription().getNavigationBarColor();

        final GraphicBuffer buffer = GraphicBuffer.create(mainWindow.getFrameLw().width(),

                mainWindow.getFrameLw().height(),

                RGBA_8888, USAGE_HW_TEXTURE | USAGE_SW_WRITE_RARELY | USAGE_SW_READ_NEVER);

        if (buffer == null) {

            return null;

        }

        final Canvas c = buffer.lockCanvas();

        final Bitmap b = Bitmap.createBitmap(mainWindow.getFrameLw().width(),

                mainWindow.getFrameLw().height(), ARGB_8888);

        final Canvas c = new Canvas(b);

        c.drawColor(color);

        final LayoutParams attrs = mainWindow.getAttrs();

        final SystemBarBackgroundPainter decorPainter = new SystemBarBackgroundPainter(attrs.flags,

                attrs.privateFlags, attrs.systemUiVisibility, statusBarColor, navigationBarColor);

        decorPainter.setInsets(mainWindow.mContentInsets, mainWindow.mStableInsets);

        decorPainter.drawDecors(c, null /* statusBarExcludeFrame */);

        buffer.unlockCanvasAndPost(c);

        return new TaskSnapshot(buffer, topChild.getConfiguration().orientation,

                mainWindow.mStableInsets, false /* reduced */, 1.0f /* scale */);

        // Flush writer.

        c.setBitmap(null);

        final Bitmap hwBitmap = b.copy(HARDWARE, false /* isMutable */);

        return new TaskSnapshot(hwBitmap.createGraphicBufferHandle(),

                topChild.getConfiguration().orientation, mainWindow.mStableInsets,

                false /* reduced */, 1.0f /* scale */);

    }

    /**