DisplayDevice.h revision 7143316af216fa92c31a60d4407b707637382da1
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/String8.h> 30#include <utils/Timers.h> 31 32#include <hardware/hwcomposer_defs.h> 33 34#include "Transform.h" 35 36struct ANativeWindow; 37 38namespace android { 39 40class DisplayInfo; 41class DisplaySurface; 42class IGraphicBufferProducer; 43class Layer; 44class SurfaceFlinger; 45class HWComposer; 46 47class DisplayDevice : public LightRefBase<DisplayDevice> 48{ 49public: 50 // region in layer-stack space 51 mutable Region dirtyRegion; 52 // region in screen space 53 mutable Region swapRegion; 54 // region in screen space 55 Region undefinedRegion; 56 57 enum DisplayType { 58 DISPLAY_ID_INVALID = -1, 59 DISPLAY_PRIMARY = HWC_DISPLAY_PRIMARY, 60 DISPLAY_EXTERNAL = HWC_DISPLAY_EXTERNAL, 61 DISPLAY_VIRTUAL = HWC_DISPLAY_VIRTUAL, 62 NUM_BUILTIN_DISPLAY_TYPES = HWC_NUM_PHYSICAL_DISPLAY_TYPES, 63 }; 64 65 enum { 66 PARTIAL_UPDATES = 0x00020000, // video driver feature 67 SWAP_RECTANGLE = 0x00080000, 68 }; 69 70 enum { 71 NO_LAYER_STACK = 0xFFFFFFFF, 72 }; 73 74 DisplayDevice( 75 const sp<SurfaceFlinger>& flinger, 76 DisplayType type, 77 int32_t hwcId, // negative for non-HWC-composited displays 78 int format, 79 bool isSecure, 80 const wp<IBinder>& displayToken, 81 const sp<DisplaySurface>& displaySurface, 82 const sp<IGraphicBufferProducer>& producer, 83 EGLConfig config); 84 85 ~DisplayDevice(); 86 87 // whether this is a valid object. An invalid DisplayDevice is returned 88 // when an non existing id is requested 89 bool isValid() const; 90 91 // isSecure indicates whether this display can be trusted to display 92 // secure surfaces. 93 bool isSecure() const { return mIsSecure; } 94 95 // Flip the front and back buffers if the back buffer is "dirty". Might 96 // be instantaneous, might involve copying the frame buffer around. 97 void flip(const Region& dirty) const; 98 99 int getWidth() const; 100 int getHeight() const; 101 PixelFormat getFormat() const; 102 uint32_t getFlags() const; 103 104 EGLSurface getEGLSurface() const; 105 106 void setVisibleLayersSortedByZ(const Vector< sp<Layer> >& layers); 107 const Vector< sp<Layer> >& getVisibleLayersSortedByZ() const; 108 bool getSecureLayerVisible() const; 109 Region getDirtyRegion(bool repaintEverything) const; 110 111 void setLayerStack(uint32_t stack); 112 void setProjection(int orientation, const Rect& viewport, const Rect& frame); 113 114 int getOrientation() const { return mOrientation; } 115 uint32_t getOrientationTransform() const; 116 const Transform& getTransform() const { return mGlobalTransform; } 117 const Rect getViewport() const { return mViewport; } 118 const Rect getFrame() const { return mFrame; } 119 const Rect& getScissor() const { return mScissor; } 120 bool needsFiltering() const { return mNeedsFiltering; } 121 122 uint32_t getLayerStack() const { return mLayerStack; } 123 int32_t getDisplayType() const { return mType; } 124 int32_t getHwcDisplayId() const { return mHwcDisplayId; } 125 const wp<IBinder>& getDisplayToken() const { return mDisplayToken; } 126 127 // We pass in mustRecompose so we can keep VirtualDisplaySurface's state 128 // machine happy without actually queueing a buffer if nothing has changed 129 status_t beginFrame(bool mustRecompose) const; 130 status_t prepareFrame(const HWComposer& hwc) const; 131 132 void swapBuffers(HWComposer& hwc) const; 133 status_t compositionComplete() const; 134 135 // called after h/w composer has completed its set() call 136 void onSwapBuffersCompleted(HWComposer& hwc) const; 137 138 Rect getBounds() const { 139 return Rect(mDisplayWidth, mDisplayHeight); 140 } 141 inline Rect bounds() const { return getBounds(); } 142 143 void setDisplayName(const String8& displayName); 144 const String8& getDisplayName() const { return mDisplayName; } 145 146 EGLBoolean makeCurrent(EGLDisplay dpy, EGLContext ctx) const; 147 void setViewportAndProjection() const; 148 149 /* ------------------------------------------------------------------------ 150 * blank / unblank management 151 */ 152 void releaseScreen() const; 153 void acquireScreen() const; 154 bool isScreenAcquired() const; 155 bool canDraw() const; 156 157 // release HWC resources (if any) for removable displays 158 void disconnect(HWComposer& hwc); 159 160 /* ------------------------------------------------------------------------ 161 * Debugging 162 */ 163 uint32_t getPageFlipCount() const; 164 void dump(String8& result) const; 165 166private: 167 /* 168 * Constants, set during initialization 169 */ 170 sp<SurfaceFlinger> mFlinger; 171 DisplayType mType; 172 int32_t mHwcDisplayId; 173 wp<IBinder> mDisplayToken; 174 175 // ANativeWindow this display is rendering into 176 sp<ANativeWindow> mNativeWindow; 177 sp<DisplaySurface> mDisplaySurface; 178 179 EGLDisplay mDisplay; 180 EGLSurface mSurface; 181 int mDisplayWidth; 182 int mDisplayHeight; 183 PixelFormat mFormat; 184 uint32_t mFlags; 185 mutable uint32_t mPageFlipCount; 186 String8 mDisplayName; 187 bool mIsSecure; 188 189 /* 190 * Can only accessed from the main thread, these members 191 * don't need synchronization. 192 */ 193 194 // list of visible layers on that display 195 Vector< sp<Layer> > mVisibleLayersSortedByZ; 196 197 // Whether we have a visible secure layer on this display 198 bool mSecureLayerVisible; 199 200 // Whether the screen is blanked; 201 mutable int mScreenAcquired; 202 203 204 /* 205 * Transaction state 206 */ 207 static status_t orientationToTransfrom(int orientation, 208 int w, int h, Transform* tr); 209 210 uint32_t mLayerStack; 211 int mOrientation; 212 // user-provided visible area of the layer stack 213 Rect mViewport; 214 // user-provided rectangle where mViewport gets mapped to 215 Rect mFrame; 216 // pre-computed scissor to apply to the display 217 Rect mScissor; 218 Transform mGlobalTransform; 219 bool mNeedsFiltering; 220}; 221 222}; // namespace android 223 224#endif // ANDROID_DISPLAY_DEVICE_H 225