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 31 namespace android { 32 // --------------------------------------------------------------------------- 33 34 LayerDim::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 39 LayerDim::~LayerDim() { 40 } 41 42 void 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 56 bool 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