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/*
* 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 com.android.server.wm;
import android.graphics.PixelFormat;
import android.util.Slog;
import android.view.Surface;
import android.view.SurfaceSession;
import java.io.PrintWriter;
class DimSurface {
static final String TAG = "DimSurface";
Surface mDimSurface;
boolean mDimShown = false;
int mDimColor = 0;
int mLayer = -1;
int mLastDimWidth, mLastDimHeight;
DimSurface(SurfaceSession session, final int layerStack) {
try {
if (WindowManagerService.DEBUG_SURFACE_TRACE) {
mDimSurface = new WindowStateAnimator.SurfaceTrace(session,
"DimSurface",
16, 16, PixelFormat.OPAQUE,
Surface.FX_SURFACE_DIM | Surface.HIDDEN);
} else {
mDimSurface = new Surface(session, "DimSurface",
16, 16, PixelFormat.OPAQUE,
Surface.FX_SURFACE_DIM | Surface.HIDDEN);
}
if (WindowManagerService.SHOW_TRANSACTIONS ||
WindowManagerService.SHOW_SURFACE_ALLOC) Slog.i(WindowManagerService.TAG,
" DIM " + mDimSurface + ": CREATE");
mDimSurface.setLayerStack(layerStack);
mDimSurface.setAlpha(0.0f);
mDimSurface.show();
} catch (Exception e) {
Slog.e(WindowManagerService.TAG, "Exception creating Dim surface", e);
}
}
/**
* Show the dim surface.
*/
void show(int dw, int dh, int layer, int color) {
if (mDimSurface == null) {
Slog.e(TAG, "show: no Surface");
return;
}
if (!mDimShown) {
if (WindowManagerService.SHOW_TRANSACTIONS) Slog.i(WindowManagerService.TAG, " DIM " + mDimSurface + ": SHOW pos=(0,0) (" +
dw + "x" + dh + " layer=" + layer + ")");
mDimShown = true;
try {
mLastDimWidth = dw;
mLastDimHeight = dh;
mDimSurface.setPosition(0, 0);
mDimSurface.setSize(dw, dh);
mDimSurface.setLayer(layer);
mDimSurface.show();
} catch (RuntimeException e) {
Slog.w(WindowManagerService.TAG, "Failure showing dim surface", e);
}
} else if (mLastDimWidth != dw || mLastDimHeight != dh || mDimColor != color
|| mLayer != layer) {
if (WindowManagerService.SHOW_TRANSACTIONS) Slog.i(WindowManagerService.TAG, " DIM " + mDimSurface + ": pos=(0,0) (" +
dw + "x" + dh + " layer=" + layer + ")");
mLastDimWidth = dw;
mLastDimHeight = dh;
mLayer = layer;
mDimColor = color;
mDimSurface.setSize(dw, dh);
mDimSurface.setLayer(layer);
mDimSurface.setAlpha(((color>>24)&0xff)/255.0f);
}
}
void hide() {
if (mDimSurface == null) {
Slog.e(TAG, "hide: no Surface");
return;
}
if (mDimShown) {
mDimShown = false;
try {
if (WindowManagerService.SHOW_TRANSACTIONS) Slog.i(WindowManagerService.TAG, " HIDE " + mDimSurface);
mDimSurface.hide();
} catch (RuntimeException e) {
Slog.w(WindowManagerService.TAG, "Illegal argument exception hiding dim surface");
}
}
}
void kill() {
if (mDimSurface != null) {
mDimSurface.destroy();
mDimSurface = null;
}
}
public void printTo(String prefix, PrintWriter pw) {
pw.print(prefix); pw.print("mDimSurface="); pw.println(mDimSurface);
pw.print(prefix); pw.print("mDimShown="); pw.print(mDimShown);
pw.print(" mLayer="); pw.print(mLayer);
pw.print(" mDimColor=0x"); pw.println(Integer.toHexString(mDimColor));
pw.print(prefix); pw.print("mLastDimWidth="); pw.print(mLastDimWidth);
pw.print(" mLastDimWidth="); pw.println(mLastDimWidth);
}
}
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