DisplayDevice.h revision db89edc94bd2a78226b407f9f7261e202e7fa325
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#ifndef ANDROID_DISPLAY_DEVICE_H 18#define ANDROID_DISPLAY_DEVICE_H 19 20#include <stdlib.h> 21 22#include <ui/PixelFormat.h> 23#include <ui/Region.h> 24 25#include <EGL/egl.h> 26#include <EGL/eglext.h> 27 28#include <utils/Mutex.h> 29#include <utils/Timers.h> 30 31#include <hardware/hwcomposer_defs.h> 32 33#include "Transform.h" 34 35struct ANativeWindow; 36 37namespace android { 38 39class DisplayInfo; 40class DisplaySurface; 41class Layer; 42class SurfaceFlinger; 43class HWComposer; 44 45class DisplayDevice : public LightRefBase<DisplayDevice> 46{ 47public: 48 // region in layer-stack space 49 mutable Region dirtyRegion; 50 // region in screen space 51 mutable Region swapRegion; 52 // region in screen space 53 Region undefinedRegion; 54 55 enum DisplayType { 56 DISPLAY_ID_INVALID = -1, 57 DISPLAY_PRIMARY = HWC_DISPLAY_PRIMARY, 58 DISPLAY_EXTERNAL = HWC_DISPLAY_EXTERNAL, 59 NUM_DISPLAY_TYPES = HWC_NUM_DISPLAY_TYPES, 60 DISPLAY_VIRTUAL = HWC_NUM_DISPLAY_TYPES 61 }; 62 63 enum { 64 PARTIAL_UPDATES = 0x00020000, // video driver feature 65 SWAP_RECTANGLE = 0x00080000, 66 }; 67 68 enum { 69 NO_LAYER_STACK = 0xFFFFFFFF, 70 }; 71 72 DisplayDevice( 73 const sp<SurfaceFlinger>& flinger, 74 DisplayType type, 75 int32_t hwcId, // negative for non-HWC-composited displays 76 bool isSecure, 77 const wp<IBinder>& displayToken, 78 const sp<DisplaySurface>& displaySurface, 79 const sp<IGraphicBufferProducer>& producer, 80 EGLConfig config); 81 82 ~DisplayDevice(); 83 84 // whether this is a valid object. An invalid DisplayDevice is returned 85 // when an non existing id is requested 86 bool isValid() const; 87 88 // isSecure indicates whether this display can be trusted to display 89 // secure surfaces. 90 bool isSecure() const { return mIsSecure; } 91 92 // Flip the front and back buffers if the back buffer is "dirty". Might 93 // be instantaneous, might involve copying the frame buffer around. 94 void flip(const Region& dirty) const; 95 96 int getWidth() const; 97 int getHeight() const; 98 PixelFormat getFormat() const; 99 uint32_t getFlags() const; 100 101 EGLSurface getEGLSurface() const; 102 103 void setVisibleLayersSortedByZ(const Vector< sp<Layer> >& layers); 104 const Vector< sp<Layer> >& getVisibleLayersSortedByZ() const; 105 bool getSecureLayerVisible() const; 106 Region getDirtyRegion(bool repaintEverything) const; 107 108 void setLayerStack(uint32_t stack); 109 void setProjection(int orientation, const Rect& viewport, const Rect& frame); 110 111 int getOrientation() const { return mOrientation; } 112 const Transform& getTransform() const { return mGlobalTransform; } 113 const Rect getViewport() const { return mViewport; } 114 const Rect getFrame() const { return mFrame; } 115 const Rect& getScissor() const { return mScissor; } 116 bool needsFiltering() const { return mNeedsFiltering; } 117 118 uint32_t getLayerStack() const { return mLayerStack; } 119 int32_t getDisplayType() const { return mType; } 120 int32_t getHwcDisplayId() const { return mHwcDisplayId; } 121 const wp<IBinder>& getDisplayToken() const { return mDisplayToken; } 122 123 status_t prepareFrame(const HWComposer& hwc) const; 124 125 void swapBuffers(HWComposer& hwc) const; 126 status_t compositionComplete() const; 127 128 // called after h/w composer has completed its set() call 129 void onSwapBuffersCompleted(HWComposer& hwc) const; 130 131 Rect getBounds() const { 132 return Rect(mDisplayWidth, mDisplayHeight); 133 } 134 inline Rect bounds() const { return getBounds(); } 135 136 void setDisplayName(const String8& displayName); 137 const String8& getDisplayName() const { return mDisplayName; } 138 139 EGLBoolean makeCurrent(EGLDisplay dpy, EGLContext ctx) const; 140 void setViewportAndProjection() const; 141 142 /* ------------------------------------------------------------------------ 143 * blank / unblank management 144 */ 145 void releaseScreen() const; 146 void acquireScreen() const; 147 bool isScreenAcquired() const; 148 bool canDraw() const; 149 150 // release HWC resources (if any) for removable displays 151 void disconnect(HWComposer& hwc); 152 153 /* ------------------------------------------------------------------------ 154 * Debugging 155 */ 156 uint32_t getPageFlipCount() const; 157 void dump(String8& result) const; 158 159private: 160 /* 161 * Constants, set during initialization 162 */ 163 sp<SurfaceFlinger> mFlinger; 164 DisplayType mType; 165 int32_t mHwcDisplayId; 166 wp<IBinder> mDisplayToken; 167 168 // ANativeWindow this display is rendering into 169 sp<ANativeWindow> mNativeWindow; 170 sp<DisplaySurface> mDisplaySurface; 171 172 EGLDisplay mDisplay; 173 EGLSurface mSurface; 174 EGLContext mContext; 175 int mDisplayWidth; 176 int mDisplayHeight; 177 PixelFormat mFormat; 178 uint32_t mFlags; 179 mutable uint32_t mPageFlipCount; 180 String8 mDisplayName; 181 bool mIsSecure; 182 183 /* 184 * Can only accessed from the main thread, these members 185 * don't need synchronization. 186 */ 187 188 // list of visible layers on that display 189 Vector< sp<Layer> > mVisibleLayersSortedByZ; 190 191 // Whether we have a visible secure layer on this display 192 bool mSecureLayerVisible; 193 194 // Whether the screen is blanked; 195 mutable int mScreenAcquired; 196 197 198 /* 199 * Transaction state 200 */ 201 static status_t orientationToTransfrom(int orientation, 202 int w, int h, Transform* tr); 203 204 uint32_t mLayerStack; 205 int mOrientation; 206 // user-provided visible area of the layer stack 207 Rect mViewport; 208 // user-provided rectangle where mViewport gets mapped to 209 Rect mFrame; 210 // pre-computed scissor to apply to the display 211 Rect mScissor; 212 Transform mGlobalTransform; 213 bool mNeedsFiltering; 214}; 215 216}; // namespace android 217 218#endif // ANDROID_DISPLAY_DEVICE_H 219