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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.Matrix;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.util.Slog;
import android.view.Surface;
import android.view.SurfaceSession;
/**
* Four black surfaces put together to make a black frame.
*/
public class BlackFrame {
class BlackSurface {
final int left;
final int top;
final Surface surface;
BlackSurface(SurfaceSession session, int layer, int l, int t, int w, int h)
throws Surface.OutOfResourcesException {
left = l;
top = t;
surface = new Surface(session, 0, "BlackSurface",
-1, w, h, PixelFormat.OPAQUE, Surface.FX_SURFACE_DIM);
surface.setAlpha(1.0f);
surface.setLayer(layer);
}
void setMatrix(Matrix matrix) {
mTmpMatrix.setTranslate(left, top);
mTmpMatrix.postConcat(matrix);
mTmpMatrix.getValues(mTmpFloats);
surface.setPosition((int)mTmpFloats[Matrix.MTRANS_X],
(int)mTmpFloats[Matrix.MTRANS_Y]);
surface.setMatrix(
mTmpFloats[Matrix.MSCALE_X], mTmpFloats[Matrix.MSKEW_Y],
mTmpFloats[Matrix.MSKEW_X], mTmpFloats[Matrix.MSCALE_Y]);
if (false) {
Slog.i(WindowManagerService.TAG, "Black Surface @ (" + left + "," + top + "): ("
+ mTmpFloats[Matrix.MTRANS_X] + ","
+ mTmpFloats[Matrix.MTRANS_Y] + ") matrix=["
+ mTmpFloats[Matrix.MSCALE_X] + ","
+ mTmpFloats[Matrix.MSCALE_Y] + "]["
+ mTmpFloats[Matrix.MSKEW_X] + ","
+ mTmpFloats[Matrix.MSKEW_Y] + "]");
}
}
void clearMatrix() {
surface.setMatrix(1, 0, 0, 1);
}
}
final Matrix mTmpMatrix = new Matrix();
final float[] mTmpFloats = new float[9];
final BlackSurface[] mBlackSurfaces = new BlackSurface[4];
public BlackFrame(SurfaceSession session, Rect outer, Rect inner,
int layer) throws Surface.OutOfResourcesException {
boolean success = false;
try {
if (outer.top < inner.top) {
mBlackSurfaces[0] = new BlackSurface(session, layer,
outer.left, outer.top, inner.right, inner.top);
}
if (outer.left < inner.left) {
mBlackSurfaces[1] = new BlackSurface(session, layer,
outer.left, inner.top, inner.left, outer.bottom);
}
if (outer.bottom > inner.bottom) {
mBlackSurfaces[2] = new BlackSurface(session, layer,
inner.left, inner.bottom, outer.right, outer.bottom);
}
if (outer.right > inner.right) {
mBlackSurfaces[3] = new BlackSurface(session, layer,
inner.right, outer.top, outer.right, inner.bottom);
}
success = true;
} finally {
if (!success) {
kill();
}
}
}
public void kill() {
if (mBlackSurfaces != null) {
for (int i=0; i<mBlackSurfaces.length; i++) {
if (mBlackSurfaces[i] != null) {
mBlackSurfaces[i].surface.destroy();
mBlackSurfaces[i] = null;
}
}
}
}
public void hide() {
if (mBlackSurfaces != null) {
for (int i=0; i<mBlackSurfaces.length; i++) {
if (mBlackSurfaces[i] != null) {
mBlackSurfaces[i].surface.hide();
}
}
}
}
public void setMatrix(Matrix matrix) {
for (int i=0; i<mBlackSurfaces.length; i++) {
if (mBlackSurfaces[i] != null) {
mBlackSurfaces[i].setMatrix(matrix);
}
}
}
public void clearMatrix() {
for (int i=0; i<mBlackSurfaces.length; i++) {
if (mBlackSurfaces[i] != null) {
mBlackSurfaces[i].clearMatrix();
}
}
}
}
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