1 /* 2 ** 3 ** Copyright 2012 The Android Open Source Project 4 ** 5 ** Licensed under the Apache License Version 2.0(the "License"); 6 ** you may not use this file except in compliance with the License. 7 ** You may obtain a copy of the License at 8 ** 9 ** http://www.apache.org/licenses/LICENSE-2.0 10 ** 11 ** Unless required by applicable law or agreed to in writing software 12 ** distributed under the License is distributed on an "AS IS" BASIS 13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND either express or implied. 14 ** See the License for the specific language governing permissions and 15 ** limitations under the License. 16 */ 17 18 // #define LOG_NDEBUG 0 19 #undef LOG_TAG 20 #define LOG_TAG "FramebufferSurface" 21 22 #include <errno.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include <string.h> 26 27 #include <utils/String8.h> 28 #include <log/log.h> 29 30 #include <EGL/egl.h> 31 32 #include <hardware/hardware.h> 33 #include <gui/BufferItem.h> 34 #include <gui/BufferQueue.h> 35 #include <gui/Surface.h> 36 37 #include <ui/GraphicBuffer.h> 38 #include <ui/Rect.h> 39 40 #include "FramebufferSurface.h" 41 #include "HWComposer.h" 42 #include "../SurfaceFlinger.h" 43 44 // ---------------------------------------------------------------------------- 45 namespace android { 46 // ---------------------------------------------------------------------------- 47 48 /* 49 * This implements the (main) framebuffer management. This class is used 50 * mostly by SurfaceFlinger, but also by command line GL application. 51 * 52 */ 53 54 FramebufferSurface::FramebufferSurface(HWComposer& hwc, int disp, 55 const sp<IGraphicBufferConsumer>& consumer) : 56 ConsumerBase(consumer), 57 mDisplayType(disp), 58 mCurrentBufferSlot(-1), 59 mCurrentBuffer(), 60 mCurrentFence(Fence::NO_FENCE), 61 #ifdef USE_HWC2 62 mHwc(hwc), 63 mHasPendingRelease(false), 64 mPreviousBufferSlot(BufferQueue::INVALID_BUFFER_SLOT), 65 mPreviousBuffer() 66 #else 67 mHwc(hwc) 68 #endif 69 { 70 #ifdef USE_HWC2 71 ALOGV("Creating for display %d", disp); 72 #endif 73 74 mName = "FramebufferSurface"; 75 mConsumer->setConsumerName(mName); 76 mConsumer->setConsumerUsageBits(GRALLOC_USAGE_HW_FB | 77 GRALLOC_USAGE_HW_RENDER | 78 GRALLOC_USAGE_HW_COMPOSER); 79 #ifdef USE_HWC2 80 const auto& activeConfig = mHwc.getActiveConfig(disp); 81 mConsumer->setDefaultBufferSize(activeConfig->getWidth(), 82 activeConfig->getHeight()); 83 #else 84 mConsumer->setDefaultBufferFormat(mHwc.getFormat(disp)); 85 mConsumer->setDefaultBufferSize(mHwc.getWidth(disp), mHwc.getHeight(disp)); 86 #endif 87 mConsumer->setMaxAcquiredBufferCount( 88 SurfaceFlinger::maxFrameBufferAcquiredBuffers - 1); 89 } 90 91 status_t FramebufferSurface::beginFrame(bool /*mustRecompose*/) { 92 return NO_ERROR; 93 } 94 95 status_t FramebufferSurface::prepareFrame(CompositionType /*compositionType*/) { 96 return NO_ERROR; 97 } 98 99 status_t FramebufferSurface::advanceFrame() { 100 #ifdef USE_HWC2 101 uint32_t slot = 0; 102 sp<GraphicBuffer> buf; 103 sp<Fence> acquireFence(Fence::NO_FENCE); 104 android_dataspace_t dataspace = HAL_DATASPACE_UNKNOWN; 105 status_t result = nextBuffer(slot, buf, acquireFence, dataspace); 106 if (result != NO_ERROR) { 107 ALOGE("error latching next FramebufferSurface buffer: %s (%d)", 108 strerror(-result), result); 109 return result; 110 } 111 result = mHwc.setClientTarget(mDisplayType, slot, 112 acquireFence, buf, dataspace); 113 if (result != NO_ERROR) { 114 ALOGE("error posting framebuffer: %d", result); 115 } 116 return result; 117 #else 118 // Once we remove FB HAL support, we can call nextBuffer() from here 119 // instead of using onFrameAvailable(). No real benefit, except it'll be 120 // more like VirtualDisplaySurface. 121 return NO_ERROR; 122 #endif 123 } 124 125 #ifdef USE_HWC2 126 status_t FramebufferSurface::nextBuffer(uint32_t& outSlot, 127 sp<GraphicBuffer>& outBuffer, sp<Fence>& outFence, 128 android_dataspace_t& outDataspace) { 129 #else 130 status_t FramebufferSurface::nextBuffer(sp<GraphicBuffer>& outBuffer, sp<Fence>& outFence) { 131 #endif 132 Mutex::Autolock lock(mMutex); 133 134 BufferItem item; 135 status_t err = acquireBufferLocked(&item, 0); 136 if (err == BufferQueue::NO_BUFFER_AVAILABLE) { 137 #ifdef USE_HWC2 138 mHwcBufferCache.getHwcBuffer(mCurrentBufferSlot, mCurrentBuffer, 139 &outSlot, &outBuffer); 140 #else 141 outBuffer = mCurrentBuffer; 142 #endif 143 return NO_ERROR; 144 } else if (err != NO_ERROR) { 145 ALOGE("error acquiring buffer: %s (%d)", strerror(-err), err); 146 return err; 147 } 148 149 // If the BufferQueue has freed and reallocated a buffer in mCurrentSlot 150 // then we may have acquired the slot we already own. If we had released 151 // our current buffer before we call acquireBuffer then that release call 152 // would have returned STALE_BUFFER_SLOT, and we would have called 153 // freeBufferLocked on that slot. Because the buffer slot has already 154 // been overwritten with the new buffer all we have to do is skip the 155 // releaseBuffer call and we should be in the same state we'd be in if we 156 // had released the old buffer first. 157 if (mCurrentBufferSlot != BufferQueue::INVALID_BUFFER_SLOT && 158 item.mSlot != mCurrentBufferSlot) { 159 #ifdef USE_HWC2 160 mHasPendingRelease = true; 161 mPreviousBufferSlot = mCurrentBufferSlot; 162 mPreviousBuffer = mCurrentBuffer; 163 #else 164 // Release the previous buffer. 165 err = releaseBufferLocked(mCurrentBufferSlot, mCurrentBuffer, 166 EGL_NO_DISPLAY, EGL_NO_SYNC_KHR); 167 if (err < NO_ERROR) { 168 ALOGE("error releasing buffer: %s (%d)", strerror(-err), err); 169 return err; 170 } 171 #endif 172 } 173 mCurrentBufferSlot = item.mSlot; 174 mCurrentBuffer = mSlots[mCurrentBufferSlot].mGraphicBuffer; 175 mCurrentFence = item.mFence; 176 177 outFence = item.mFence; 178 #ifdef USE_HWC2 179 mHwcBufferCache.getHwcBuffer(mCurrentBufferSlot, mCurrentBuffer, 180 &outSlot, &outBuffer); 181 outDataspace = item.mDataSpace; 182 #else 183 outBuffer = mCurrentBuffer; 184 #endif 185 return NO_ERROR; 186 } 187 188 #ifndef USE_HWC2 189 // Overrides ConsumerBase::onFrameAvailable(), does not call base class impl. 190 void FramebufferSurface::onFrameAvailable(const BufferItem& /* item */) { 191 sp<GraphicBuffer> buf; 192 sp<Fence> acquireFence; 193 status_t err = nextBuffer(buf, acquireFence); 194 if (err != NO_ERROR) { 195 ALOGE("error latching nnext FramebufferSurface buffer: %s (%d)", 196 strerror(-err), err); 197 return; 198 } 199 err = mHwc.fbPost(mDisplayType, acquireFence, buf); 200 if (err != NO_ERROR) { 201 ALOGE("error posting framebuffer: %d", err); 202 } 203 } 204 #endif 205 206 void FramebufferSurface::freeBufferLocked(int slotIndex) { 207 ConsumerBase::freeBufferLocked(slotIndex); 208 if (slotIndex == mCurrentBufferSlot) { 209 mCurrentBufferSlot = BufferQueue::INVALID_BUFFER_SLOT; 210 } 211 } 212 213 void FramebufferSurface::onFrameCommitted() { 214 #ifdef USE_HWC2 215 if (mHasPendingRelease) { 216 sp<Fence> fence = mHwc.getPresentFence(mDisplayType); 217 if (fence->isValid()) { 218 status_t result = addReleaseFence(mPreviousBufferSlot, 219 mPreviousBuffer, fence); 220 ALOGE_IF(result != NO_ERROR, "onFrameCommitted: failed to add the" 221 " fence: %s (%d)", strerror(-result), result); 222 } 223 status_t result = releaseBufferLocked(mPreviousBufferSlot, 224 mPreviousBuffer, EGL_NO_DISPLAY, EGL_NO_SYNC_KHR); 225 ALOGE_IF(result != NO_ERROR, "onFrameCommitted: error releasing buffer:" 226 " %s (%d)", strerror(-result), result); 227 228 mPreviousBuffer.clear(); 229 mHasPendingRelease = false; 230 } 231 #else 232 sp<Fence> fence = mHwc.getAndResetReleaseFence(mDisplayType); 233 if (fence->isValid() && 234 mCurrentBufferSlot != BufferQueue::INVALID_BUFFER_SLOT) { 235 status_t err = addReleaseFence(mCurrentBufferSlot, 236 mCurrentBuffer, fence); 237 ALOGE_IF(err, "setReleaseFenceFd: failed to add the fence: %s (%d)", 238 strerror(-err), err); 239 } 240 #endif 241 } 242 243 #ifndef USE_HWC2 244 status_t FramebufferSurface::compositionComplete() 245 { 246 return mHwc.fbCompositionComplete(); 247 } 248 #endif 249 250 void FramebufferSurface::dumpAsString(String8& result) const { 251 ConsumerBase::dumpState(result); 252 } 253 254 void FramebufferSurface::dumpLocked(String8& result, const char* prefix) const 255 { 256 #ifndef USE_HWC2 257 mHwc.fbDump(result); 258 #endif 259 ConsumerBase::dumpLocked(result, prefix); 260 } 261 262 const sp<Fence>& FramebufferSurface::getClientTargetAcquireFence() const { 263 return mCurrentFence; 264 } 265 266 // ---------------------------------------------------------------------------- 267 }; // namespace android 268 // ---------------------------------------------------------------------------- 269
