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 "DisplayHardware/DisplayHardware.h" 29 30 namespace android { 31 // --------------------------------------------------------------------------- 32 33 LayerDim::LayerDim(SurfaceFlinger* flinger, DisplayID display, 34 const sp<Client>& client) 35 : LayerBaseClient(flinger, display, client) 36 { 37 } 38 39 LayerDim::~LayerDim() 40 { 41 } 42 43 void LayerDim::onDraw(const Region& clip) const 44 { 45 const State& s(drawingState()); 46 if (s.alpha>0) { 47 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 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 glVertexPointer(2, GL_FLOAT, 0, mVertices); 63 glDrawArrays(GL_TRIANGLE_FAN, 0, 4); 64 65 glDisable(GL_BLEND); 66 glDisableClientState(GL_TEXTURE_COORD_ARRAY); 67 } 68 } 69 70 // --------------------------------------------------------------------------- 71 72 }; // namespace android 73
