1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17// #define LOG_NDEBUG 0
18#undef LOG_TAG
19#define LOG_TAG "LayerDim"
20
21#include <stdlib.h>
22#include <stdint.h>
23#include <sys/types.h>
24
25#include <utils/Errors.h>
26#include <utils/Log.h>
27
28#include <ui/GraphicBuffer.h>
29
30#include "LayerDim.h"
31#include "SurfaceFlinger.h"
32#include "DisplayDevice.h"
33#include "RenderEngine/RenderEngine.h"
34
35namespace android {
36// ---------------------------------------------------------------------------
37
38LayerDim::LayerDim(SurfaceFlinger* flinger, const sp<Client>& client,
39        const String8& name, uint32_t w, uint32_t h, uint32_t flags)
40    : Layer(flinger, client, name, w, h, flags) {
41}
42
43LayerDim::~LayerDim() {
44}
45
46void LayerDim::onDraw(const sp<const DisplayDevice>& hw,
47        const Region& /* clip */, bool useIdentityTransform) const
48{
49    const State& s(getDrawingState());
50    if (s.alpha>0) {
51        Mesh mesh(Mesh::TRIANGLE_FAN, 4, 2);
52        computeGeometry(hw, mesh, useIdentityTransform);
53        RenderEngine& engine(mFlinger->getRenderEngine());
54        engine.setupDimLayerBlending(s.alpha);
55        engine.drawMesh(mesh);
56        engine.disableBlending();
57    }
58}
59
60bool LayerDim::isVisible() const {
61    const Layer::State& s(getDrawingState());
62    return !isHiddenByPolicy() && s.alpha;
63}
64
65
66// ---------------------------------------------------------------------------
67
68}; // namespace android
69