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#define LOG_TAG "SurfaceFlinger" 18 19#include <stdlib.h> 20#include <stdint.h> 21#include <sys/types.h> 22 23#include <utils/Errors.h> 24#include <utils/Log.h> 25 26#include "LayerDim.h" 27#include "SurfaceFlinger.h" 28#include "VRamHeap.h" 29#include "DisplayHardware/DisplayHardware.h" 30 31namespace android { 32// --------------------------------------------------------------------------- 33 34const uint32_t LayerDim::typeInfo = LayerBaseClient::typeInfo | 0x10; 35const char* const LayerDim::typeID = "LayerDim"; 36sp<MemoryDealer> LayerDim::mDimmerDealer; 37LayerBitmap LayerDim::mDimmerBitmap; 38 39// --------------------------------------------------------------------------- 40 41LayerDim::LayerDim(SurfaceFlinger* flinger, DisplayID display, 42 Client* client, int32_t i) 43 : LayerBaseClient(flinger, display, client, i) 44{ 45} 46 47void LayerDim::initDimmer(SurfaceFlinger* flinger, uint32_t w, uint32_t h) 48{ 49 // must only be called once. 50 mDimmerDealer = flinger->getSurfaceHeapManager() 51 ->createHeap(ISurfaceComposer::eHardware); 52 if (mDimmerDealer != 0) { 53 mDimmerBitmap.init(mDimmerDealer); 54 mDimmerBitmap.setBits(w, h, 1, PIXEL_FORMAT_RGB_565); 55 mDimmerBitmap.clear(); 56 } 57} 58 59LayerDim::~LayerDim() 60{ 61} 62 63void LayerDim::onDraw(const Region& clip) const 64{ 65 const State& s(drawingState()); 66 67 Region::iterator iterator(clip); 68 if (s.alpha>0 && iterator) { 69 const DisplayHardware& hw(graphicPlane(0).displayHardware()); 70 71 status_t err = NO_ERROR; 72 const int can_use_copybit = canUseCopybit(); 73 if (can_use_copybit) { 74 // StopWatch watch("copybit"); 75 copybit_image_t dst; 76 hw.getDisplaySurface(&dst); 77 const copybit_rect_t& drect 78 = reinterpret_cast<const copybit_rect_t&>(mTransformedBounds); 79 80 copybit_image_t src; 81 mDimmerBitmap.getBitmapSurface(&src); 82 const copybit_rect_t& srect(drect); 83 84 copybit_device_t* copybit = mFlinger->getBlitEngine(); 85 copybit->set_parameter(copybit, COPYBIT_TRANSFORM, 0); 86 copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, s.alpha); 87 copybit->set_parameter(copybit, COPYBIT_DITHER, COPYBIT_ENABLE); 88 region_iterator it(clip); 89 err = copybit->stretch(copybit, &dst, &src, &drect, &srect, &it); 90 } 91 92 if (!can_use_copybit || err) { 93 const GGLfixed alpha = (s.alpha << 16)/255; 94 const uint32_t fbHeight = hw.getHeight(); 95 glDisable(GL_TEXTURE_2D); 96 glDisable(GL_DITHER); 97 glEnable(GL_BLEND); 98 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); 99 glColor4x(0, 0, 0, alpha); 100 glVertexPointer(2, GL_FIXED, 0, mVertices); 101 Rect r; 102 while (iterator.iterate(&r)) { 103 const GLint sy = fbHeight - (r.top + r.height()); 104 glScissor(r.left, sy, r.width(), r.height()); 105 glDrawArrays(GL_TRIANGLE_FAN, 0, 4); 106 } 107 } 108 } 109} 110 111// --------------------------------------------------------------------------- 112 113}; // namespace android 114