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 <stdlib.h> 23#include <stdio.h> 24#include <string.h> 25#include <errno.h> 26 27#include <cutils/log.h> 28 29#include <utils/String8.h> 30 31#include <ui/Rect.h> 32 33#include <EGL/egl.h> 34 35#include <hardware/hardware.h> 36#include <gui/BufferItem.h> 37#include <gui/GraphicBufferAlloc.h> 38#include <gui/Surface.h> 39#include <ui/GraphicBuffer.h> 40 41#include "FramebufferSurface.h" 42#include "HWComposer.h" 43 44#ifndef NUM_FRAMEBUFFER_SURFACE_BUFFERS 45#define NUM_FRAMEBUFFER_SURFACE_BUFFERS (2) 46#endif 47 48// ---------------------------------------------------------------------------- 49namespace android { 50// ---------------------------------------------------------------------------- 51 52/* 53 * This implements the (main) framebuffer management. This class is used 54 * mostly by SurfaceFlinger, but also by command line GL application. 55 * 56 */ 57 58FramebufferSurface::FramebufferSurface(HWComposer& hwc, int disp, 59 const sp<IGraphicBufferConsumer>& consumer) : 60 ConsumerBase(consumer), 61 mDisplayType(disp), 62 mCurrentBufferSlot(-1), 63 mCurrentBuffer(), 64 mCurrentFence(Fence::NO_FENCE), 65#ifdef USE_HWC2 66 mHwc(hwc), 67 mHasPendingRelease(false), 68 mPreviousBufferSlot(BufferQueue::INVALID_BUFFER_SLOT), 69 mPreviousBuffer() 70#else 71 mHwc(hwc) 72#endif 73{ 74#ifdef USE_HWC2 75 ALOGV("Creating for display %d", disp); 76#endif 77 78 mName = "FramebufferSurface"; 79 mConsumer->setConsumerName(mName); 80 mConsumer->setConsumerUsageBits(GRALLOC_USAGE_HW_FB | 81 GRALLOC_USAGE_HW_RENDER | 82 GRALLOC_USAGE_HW_COMPOSER); 83#ifdef USE_HWC2 84 const auto& activeConfig = mHwc.getActiveConfig(disp); 85 mConsumer->setDefaultBufferSize(activeConfig->getWidth(), 86 activeConfig->getHeight()); 87#else 88 mConsumer->setDefaultBufferFormat(mHwc.getFormat(disp)); 89 mConsumer->setDefaultBufferSize(mHwc.getWidth(disp), mHwc.getHeight(disp)); 90#endif 91 mConsumer->setMaxAcquiredBufferCount(NUM_FRAMEBUFFER_SURFACE_BUFFERS - 1); 92} 93 94status_t FramebufferSurface::beginFrame(bool /*mustRecompose*/) { 95 return NO_ERROR; 96} 97 98status_t FramebufferSurface::prepareFrame(CompositionType /*compositionType*/) { 99 return NO_ERROR; 100} 101 102status_t FramebufferSurface::advanceFrame() { 103#ifdef USE_HWC2 104 sp<GraphicBuffer> buf; 105 sp<Fence> acquireFence(Fence::NO_FENCE); 106 android_dataspace_t dataspace = HAL_DATASPACE_UNKNOWN; 107 status_t result = nextBuffer(buf, acquireFence, dataspace); 108 if (result != NO_ERROR) { 109 ALOGE("error latching next FramebufferSurface buffer: %s (%d)", 110 strerror(-result), result); 111 return result; 112 } 113 result = mHwc.setClientTarget(mDisplayType, acquireFence, buf, dataspace); 114 if (result != NO_ERROR) { 115 ALOGE("error posting framebuffer: %d", result); 116 } 117 return result; 118#else 119 // Once we remove FB HAL support, we can call nextBuffer() from here 120 // instead of using onFrameAvailable(). No real benefit, except it'll be 121 // more like VirtualDisplaySurface. 122 return NO_ERROR; 123#endif 124} 125 126#ifdef USE_HWC2 127status_t FramebufferSurface::nextBuffer(sp<GraphicBuffer>& outBuffer, 128 sp<Fence>& outFence, android_dataspace_t& outDataspace) { 129#else 130status_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 outBuffer = mCurrentBuffer; 138 return NO_ERROR; 139 } else if (err != NO_ERROR) { 140 ALOGE("error acquiring buffer: %s (%d)", strerror(-err), err); 141 return err; 142 } 143 144 // If the BufferQueue has freed and reallocated a buffer in mCurrentSlot 145 // then we may have acquired the slot we already own. If we had released 146 // our current buffer before we call acquireBuffer then that release call 147 // would have returned STALE_BUFFER_SLOT, and we would have called 148 // freeBufferLocked on that slot. Because the buffer slot has already 149 // been overwritten with the new buffer all we have to do is skip the 150 // releaseBuffer call and we should be in the same state we'd be in if we 151 // had released the old buffer first. 152 if (mCurrentBufferSlot != BufferQueue::INVALID_BUFFER_SLOT && 153 item.mSlot != mCurrentBufferSlot) { 154#ifdef USE_HWC2 155 mHasPendingRelease = true; 156 mPreviousBufferSlot = mCurrentBufferSlot; 157 mPreviousBuffer = mCurrentBuffer; 158#else 159 // Release the previous buffer. 160 err = releaseBufferLocked(mCurrentBufferSlot, mCurrentBuffer, 161 EGL_NO_DISPLAY, EGL_NO_SYNC_KHR); 162 if (err < NO_ERROR) { 163 ALOGE("error releasing buffer: %s (%d)", strerror(-err), err); 164 return err; 165 } 166#endif 167 } 168 mCurrentBufferSlot = item.mSlot; 169 mCurrentBuffer = mSlots[mCurrentBufferSlot].mGraphicBuffer; 170 mCurrentFence = item.mFence; 171 172 outFence = item.mFence; 173 outBuffer = mCurrentBuffer; 174#ifdef USE_HWC2 175 outDataspace = item.mDataSpace; 176#endif 177 return NO_ERROR; 178} 179 180#ifndef USE_HWC2 181// Overrides ConsumerBase::onFrameAvailable(), does not call base class impl. 182void FramebufferSurface::onFrameAvailable(const BufferItem& /* item */) { 183 sp<GraphicBuffer> buf; 184 sp<Fence> acquireFence; 185 status_t err = nextBuffer(buf, acquireFence); 186 if (err != NO_ERROR) { 187 ALOGE("error latching nnext FramebufferSurface buffer: %s (%d)", 188 strerror(-err), err); 189 return; 190 } 191 err = mHwc.fbPost(mDisplayType, acquireFence, buf); 192 if (err != NO_ERROR) { 193 ALOGE("error posting framebuffer: %d", err); 194 } 195} 196#endif 197 198void FramebufferSurface::freeBufferLocked(int slotIndex) { 199 ConsumerBase::freeBufferLocked(slotIndex); 200 if (slotIndex == mCurrentBufferSlot) { 201 mCurrentBufferSlot = BufferQueue::INVALID_BUFFER_SLOT; 202 } 203} 204 205void FramebufferSurface::onFrameCommitted() { 206#ifdef USE_HWC2 207 if (mHasPendingRelease) { 208 sp<Fence> fence = mHwc.getRetireFence(mDisplayType); 209 if (fence->isValid()) { 210 status_t result = addReleaseFence(mPreviousBufferSlot, 211 mPreviousBuffer, fence); 212 ALOGE_IF(result != NO_ERROR, "onFrameCommitted: failed to add the" 213 " fence: %s (%d)", strerror(-result), result); 214 } 215 status_t result = releaseBufferLocked(mPreviousBufferSlot, 216 mPreviousBuffer, EGL_NO_DISPLAY, EGL_NO_SYNC_KHR); 217 ALOGE_IF(result != NO_ERROR, "onFrameCommitted: error releasing buffer:" 218 " %s (%d)", strerror(-result), result); 219 220 mPreviousBuffer.clear(); 221 mHasPendingRelease = false; 222 } 223#else 224 sp<Fence> fence = mHwc.getAndResetReleaseFence(mDisplayType); 225 if (fence->isValid() && 226 mCurrentBufferSlot != BufferQueue::INVALID_BUFFER_SLOT) { 227 status_t err = addReleaseFence(mCurrentBufferSlot, 228 mCurrentBuffer, fence); 229 ALOGE_IF(err, "setReleaseFenceFd: failed to add the fence: %s (%d)", 230 strerror(-err), err); 231 } 232#endif 233} 234 235#ifndef USE_HWC2 236status_t FramebufferSurface::compositionComplete() 237{ 238 return mHwc.fbCompositionComplete(); 239} 240#endif 241 242void FramebufferSurface::dumpAsString(String8& result) const { 243 ConsumerBase::dump(result); 244} 245 246void FramebufferSurface::dumpLocked(String8& result, const char* prefix) const 247{ 248#ifndef USE_HWC2 249 mHwc.fbDump(result); 250#endif 251 ConsumerBase::dumpLocked(result, prefix); 252} 253 254const sp<Fence>& FramebufferSurface::getClientTargetAcquireFence() const { 255 return mCurrentFence; 256} 257 258// ---------------------------------------------------------------------------- 259}; // namespace android 260// ---------------------------------------------------------------------------- 261