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 : LayerBaseClient(flinger, client) 38{ 39} 40 41LayerDim::~LayerDim() 42{ 43} 44 45void LayerDim::onDraw(const sp<const DisplayDevice>& hw, const Region& clip) const 46{ 47 const State& s(drawingState()); 48 if (s.alpha>0) { 49 const GLfloat alpha = s.alpha/255.0f; 50 const uint32_t fbHeight = hw->getHeight(); 51 glDisable(GL_TEXTURE_EXTERNAL_OES); 52 glDisable(GL_TEXTURE_2D); 53 54 if (s.alpha == 0xFF) { 55 glDisable(GL_BLEND); 56 } else { 57 glEnable(GL_BLEND); 58 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); 59 } 60 61 glColor4f(0, 0, 0, alpha); 62 63 LayerMesh mesh; 64 computeGeometry(hw, &mesh); 65 66 glVertexPointer(2, GL_FLOAT, 0, mesh.getVertices()); 67 glDrawArrays(GL_TRIANGLE_FAN, 0, mesh.getVertexCount()); 68 69 glDisable(GL_BLEND); 70 glDisableClientState(GL_TEXTURE_COORD_ARRAY); 71 } 72} 73 74// --------------------------------------------------------------------------- 75 76}; // namespace android 77