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 35 struct ANativeWindow; 36 37 namespace android { 38 39 class DisplayInfo; 40 class DisplaySurface; 41 class Layer; 42 class SurfaceFlinger; 43 class HWComposer; 44 45 class DisplayDevice : public LightRefBase<DisplayDevice> 46 { 47 public: 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 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 // release HWC resources (if any) for removable displays 150 void disconnect(HWComposer& hwc); 151 152 /* ------------------------------------------------------------------------ 153 * Debugging 154 */ 155 uint32_t getPageFlipCount() const; 156 void dump(String8& result, char* buffer, size_t SIZE) const; 157 158 private: 159 /* 160 * Constants, set during initialization 161 */ 162 sp<SurfaceFlinger> mFlinger; 163 DisplayType mType; 164 int32_t mHwcDisplayId; 165 wp<IBinder> mDisplayToken; 166 167 // ANativeWindow this display is rendering into 168 sp<ANativeWindow> mNativeWindow; 169 sp<DisplaySurface> mDisplaySurface; 170 171 EGLDisplay mDisplay; 172 EGLSurface mSurface; 173 EGLContext mContext; 174 int mDisplayWidth; 175 int mDisplayHeight; 176 PixelFormat mFormat; 177 uint32_t mFlags; 178 mutable uint32_t mPageFlipCount; 179 String8 mDisplayName; 180 bool mIsSecure; 181 182 /* 183 * Can only accessed from the main thread, these members 184 * don't need synchronization. 185 */ 186 187 // list of visible layers on that display 188 Vector< sp<Layer> > mVisibleLayersSortedByZ; 189 190 // Whether we have a visible secure layer on this display 191 bool mSecureLayerVisible; 192 193 // Whether the screen is blanked; 194 mutable int mScreenAcquired; 195 196 197 /* 198 * Transaction state 199 */ 200 static status_t orientationToTransfrom(int orientation, 201 int w, int h, Transform* tr); 202 203 uint32_t mLayerStack; 204 int mOrientation; 205 // user-provided visible area of the layer stack 206 Rect mViewport; 207 // user-provided rectangle where mViewport gets mapped to 208 Rect mFrame; 209 // pre-computed scissor to apply to the display 210 Rect mScissor; 211 Transform mGlobalTransform; 212 bool mNeedsFiltering; 213 }; 214 215 }; // namespace android 216 217 #endif // ANDROID_DISPLAY_DEVICE_H 218
