LayerDim.cpp revision 1eae0ee49402c39f1b08cc8fec129023f86494b7
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 <GLES/gl.h> 22#include <GLES/glext.h> 23 24#include <utils/Errors.h> 25#include <utils/Log.h> 26 27#include <ui/GraphicBuffer.h> 28 29#include "LayerDim.h" 30#include "SurfaceFlinger.h" 31#include "DisplayDevice.h" 32 33namespace android { 34// --------------------------------------------------------------------------- 35 36LayerDim::LayerDim(SurfaceFlinger* flinger, const sp<Client>& client, 37 const String8& name, uint32_t w, uint32_t h, uint32_t flags) 38 : Layer(flinger, client, name, w, h, flags) { 39} 40 41LayerDim::~LayerDim() { 42} 43 44void LayerDim::onDraw(const sp<const DisplayDevice>& hw, const Region& clip) const 45{ 46 const State& s(getDrawingState()); 47 if (s.alpha>0) { 48 const GLfloat alpha = s.alpha/255.0f; 49 const uint32_t fbHeight = hw->getHeight(); 50 glDisable(GL_TEXTURE_EXTERNAL_OES); 51 glDisable(GL_TEXTURE_2D); 52 53 if (s.alpha == 0xFF) { 54 glDisable(GL_BLEND); 55 } else { 56 glEnable(GL_BLEND); 57 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); 58 } 59 60 glColor4f(0, 0, 0, alpha); 61 62 LayerMesh mesh; 63 computeGeometry(hw, &mesh); 64 65 glVertexPointer(2, GL_FLOAT, 0, mesh.getVertices()); 66 glDrawArrays(GL_TRIANGLE_FAN, 0, mesh.getVertexCount()); 67 68 glDisable(GL_BLEND); 69 glDisableClientState(GL_TEXTURE_COORD_ARRAY); 70 } 71} 72 73bool LayerDim::isVisible() const { 74 const Layer::State& s(getDrawingState()); 75 return !(s.flags & layer_state_t::eLayerHidden) && s.alpha; 76} 77 78 79// --------------------------------------------------------------------------- 80 81}; // namespace android 82