DisplayDevice.h revision 13127d8921356dff794250e04208c3ed60b3a3df
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 FramebufferSurface; 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 bool isSecure, 76 const wp<IBinder>& displayToken, 77 const sp<ANativeWindow>& nativeWindow, 78 const sp<FramebufferSurface>& framebufferSurface, 79 EGLConfig config); 80 81 ~DisplayDevice(); 82 83 // whether this is a valid object. An invalid DisplayDevice is returned 84 // when an non existing id is requested 85 bool isValid() const; 86 87 // isSecure indicates whether this display can be trusted to display 88 // secure surfaces. 89 bool isSecure() const { return mIsSecure; } 90 91 // Flip the front and back buffers if the back buffer is "dirty". Might 92 // be instantaneous, might involve copying the frame buffer around. 93 void flip(const Region& dirty) const; 94 95 int getWidth() const; 96 int getHeight() const; 97 PixelFormat getFormat() const; 98 uint32_t getFlags() const; 99 100 EGLSurface getEGLSurface() const; 101 102 void setVisibleLayersSortedByZ(const Vector< sp<Layer> >& layers); 103 const Vector< sp<Layer> >& getVisibleLayersSortedByZ() const; 104 bool getSecureLayerVisible() const; 105 Region getDirtyRegion(bool repaintEverything) const; 106 107 void setLayerStack(uint32_t stack); 108 void setProjection(int orientation, const Rect& viewport, const Rect& frame); 109 110 int getOrientation() const { return mOrientation; } 111 const Transform& getTransform() const { return mGlobalTransform; } 112 const Rect getViewport() const { return mViewport; } 113 const Rect getFrame() const { return mFrame; } 114 const Rect& getScissor() const { return mScissor; } 115 bool needsFiltering() const { return mNeedsFiltering; } 116 117 uint32_t getLayerStack() const { return mLayerStack; } 118 int32_t getDisplayType() const { return mType; } 119 int32_t getHwcDisplayId() const { return mHwcDisplayId; } 120 const wp<IBinder>& getDisplayToken() const { return mDisplayToken; } 121 122 void swapBuffers(HWComposer& hwc) const; 123 status_t compositionComplete() const; 124 125 // called after h/w composer has completed its set() call 126 void onSwapBuffersCompleted(HWComposer& hwc) const; 127 128 Rect getBounds() const { 129 return Rect(mDisplayWidth, mDisplayHeight); 130 } 131 inline Rect bounds() const { return getBounds(); } 132 133 void setDisplayName(const String8& displayName); 134 const String8& getDisplayName() const { return mDisplayName; } 135 136 static EGLBoolean makeCurrent(EGLDisplay dpy, 137 const sp<const DisplayDevice>& hw, EGLContext ctx); 138 139 static void setViewportAndProjection(const sp<const DisplayDevice>& hw); 140 141 /* ------------------------------------------------------------------------ 142 * blank / unblank management 143 */ 144 void releaseScreen() const; 145 void acquireScreen() const; 146 bool isScreenAcquired() const; 147 bool canDraw() const; 148 149 /* ------------------------------------------------------------------------ 150 * Debugging 151 */ 152 uint32_t getPageFlipCount() const; 153 void dump(String8& result, char* buffer, size_t SIZE) const; 154 155private: 156 void init(EGLConfig config); 157 158 /* 159 * Constants, set during initialization 160 */ 161 sp<SurfaceFlinger> mFlinger; 162 DisplayType mType; 163 int32_t mHwcDisplayId; 164 wp<IBinder> mDisplayToken; 165 166 // ANativeWindow this display is rendering into 167 sp<ANativeWindow> mNativeWindow; 168 169 // set if mNativeWindow is a FramebufferSurface 170 sp<FramebufferSurface> mFramebufferSurface; 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