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#include <stdlib.h>
18#include <stdint.h>
19#include <sys/types.h>
20
21#include <utils/Errors.h>
22#include <utils/Log.h>
23
24#include <ui/GraphicBuffer.h>
25
26#include "LayerDim.h"
27#include "SurfaceFlinger.h"
28#include "DisplayDevice.h"
29#include "RenderEngine/RenderEngine.h"
30
31namespace android {
32// ---------------------------------------------------------------------------
33
34LayerDim::LayerDim(SurfaceFlinger* flinger, const sp<Client>& client,
35        const String8& name, uint32_t w, uint32_t h, uint32_t flags)
36    : Layer(flinger, client, name, w, h, flags) {
37}
38
39LayerDim::~LayerDim() {
40}
41
42void LayerDim::onDraw(const sp<const DisplayDevice>& hw,
43        const Region& /* clip */, bool useIdentityTransform) const
44{
45    const State& s(getDrawingState());
46    if (s.alpha>0) {
47        Mesh mesh(Mesh::TRIANGLE_FAN, 4, 2);
48        computeGeometry(hw, mesh, useIdentityTransform);
49        RenderEngine& engine(mFlinger->getRenderEngine());
50        engine.setupDimLayerBlending(s.alpha);
51        engine.drawMesh(mesh);
52        engine.disableBlending();
53    }
54}
55
56bool LayerDim::isVisible() const {
57    const Layer::State& s(getDrawingState());
58    return !(s.flags & layer_state_t::eLayerHidden) && s.alpha;
59}
60
61
62// ---------------------------------------------------------------------------
63
64}; // namespace android
65