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 <hardware/hardware.h>
31 #include <gui/BufferItem.h>
32 #include <gui/BufferQueue.h>
33 #include <gui/Surface.h>
34
35 #include <ui/DebugUtils.h>
36 #include <ui/GraphicBuffer.h>
37 #include <ui/Rect.h>
38
39 #include "FramebufferSurface.h"
40 #include "HWComposer.h"
41 #include "../SurfaceFlinger.h"
42
43 // ----------------------------------------------------------------------------
44 namespace android {
45 // ----------------------------------------------------------------------------
46
47 using ui::Dataspace;
48
49 /*
50 * This implements the (main) framebuffer management. This class is used
51 * mostly by SurfaceFlinger, but also by command line GL application.
52 *
53 */
54
FramebufferSurface(HWComposer & hwc,DisplayId displayId,const sp<IGraphicBufferConsumer> & consumer)55 FramebufferSurface::FramebufferSurface(HWComposer& hwc, DisplayId displayId,
56 const sp<IGraphicBufferConsumer>& consumer)
57 : ConsumerBase(consumer),
58 mDisplayId(displayId),
59 mCurrentBufferSlot(-1),
60 mCurrentBuffer(),
61 mCurrentFence(Fence::NO_FENCE),
62 mHwc(hwc),
63 mHasPendingRelease(false),
64 mPreviousBufferSlot(BufferQueue::INVALID_BUFFER_SLOT),
65 mPreviousBuffer() {
66 ALOGV("Creating for display %s", to_string(displayId).c_str());
67
68 mName = "FramebufferSurface";
69 mConsumer->setConsumerName(mName);
70 mConsumer->setConsumerUsageBits(GRALLOC_USAGE_HW_FB |
71 GRALLOC_USAGE_HW_RENDER |
72 GRALLOC_USAGE_HW_COMPOSER);
73 const auto& activeConfig = mHwc.getActiveConfig(displayId);
74 mConsumer->setDefaultBufferSize(activeConfig->getWidth(),
75 activeConfig->getHeight());
76 mConsumer->setMaxAcquiredBufferCount(
77 SurfaceFlinger::maxFrameBufferAcquiredBuffers - 1);
78 }
79
resizeBuffers(const uint32_t width,const uint32_t height)80 void FramebufferSurface::resizeBuffers(const uint32_t width, const uint32_t height) {
81 mConsumer->setDefaultBufferSize(width, height);
82 }
83
beginFrame(bool)84 status_t FramebufferSurface::beginFrame(bool /*mustRecompose*/) {
85 return NO_ERROR;
86 }
87
prepareFrame(CompositionType)88 status_t FramebufferSurface::prepareFrame(CompositionType /*compositionType*/) {
89 return NO_ERROR;
90 }
91
advanceFrame()92 status_t FramebufferSurface::advanceFrame() {
93 uint32_t slot = 0;
94 sp<GraphicBuffer> buf;
95 sp<Fence> acquireFence(Fence::NO_FENCE);
96 Dataspace dataspace = Dataspace::UNKNOWN;
97 status_t result = nextBuffer(slot, buf, acquireFence, dataspace);
98 mDataSpace = dataspace;
99 if (result != NO_ERROR) {
100 ALOGE("error latching next FramebufferSurface buffer: %s (%d)",
101 strerror(-result), result);
102 }
103 return result;
104 }
105
nextBuffer(uint32_t & outSlot,sp<GraphicBuffer> & outBuffer,sp<Fence> & outFence,Dataspace & outDataspace)106 status_t FramebufferSurface::nextBuffer(uint32_t& outSlot,
107 sp<GraphicBuffer>& outBuffer, sp<Fence>& outFence,
108 Dataspace& outDataspace) {
109 Mutex::Autolock lock(mMutex);
110
111 BufferItem item;
112 status_t err = acquireBufferLocked(&item, 0);
113 if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
114 mHwcBufferCache.getHwcBuffer(mCurrentBufferSlot, mCurrentBuffer, &outSlot, &outBuffer);
115 return NO_ERROR;
116 } else if (err != NO_ERROR) {
117 ALOGE("error acquiring buffer: %s (%d)", strerror(-err), err);
118 return err;
119 }
120
121 // If the BufferQueue has freed and reallocated a buffer in mCurrentSlot
122 // then we may have acquired the slot we already own. If we had released
123 // our current buffer before we call acquireBuffer then that release call
124 // would have returned STALE_BUFFER_SLOT, and we would have called
125 // freeBufferLocked on that slot. Because the buffer slot has already
126 // been overwritten with the new buffer all we have to do is skip the
127 // releaseBuffer call and we should be in the same state we'd be in if we
128 // had released the old buffer first.
129 if (mCurrentBufferSlot != BufferQueue::INVALID_BUFFER_SLOT &&
130 item.mSlot != mCurrentBufferSlot) {
131 mHasPendingRelease = true;
132 mPreviousBufferSlot = mCurrentBufferSlot;
133 mPreviousBuffer = mCurrentBuffer;
134 }
135 mCurrentBufferSlot = item.mSlot;
136 mCurrentBuffer = mSlots[mCurrentBufferSlot].mGraphicBuffer;
137 mCurrentFence = item.mFence;
138
139 outFence = item.mFence;
140 mHwcBufferCache.getHwcBuffer(mCurrentBufferSlot, mCurrentBuffer, &outSlot, &outBuffer);
141 outDataspace = static_cast<Dataspace>(item.mDataSpace);
142 status_t result = mHwc.setClientTarget(mDisplayId, outSlot, outFence, outBuffer, outDataspace);
143 if (result != NO_ERROR) {
144 ALOGE("error posting framebuffer: %d", result);
145 return result;
146 }
147
148 return NO_ERROR;
149 }
150
freeBufferLocked(int slotIndex)151 void FramebufferSurface::freeBufferLocked(int slotIndex) {
152 ConsumerBase::freeBufferLocked(slotIndex);
153 if (slotIndex == mCurrentBufferSlot) {
154 mCurrentBufferSlot = BufferQueue::INVALID_BUFFER_SLOT;
155 }
156 }
157
onFrameCommitted()158 void FramebufferSurface::onFrameCommitted() {
159 if (mHasPendingRelease) {
160 sp<Fence> fence = mHwc.getPresentFence(mDisplayId);
161 if (fence->isValid()) {
162 status_t result = addReleaseFence(mPreviousBufferSlot,
163 mPreviousBuffer, fence);
164 ALOGE_IF(result != NO_ERROR, "onFrameCommitted: failed to add the"
165 " fence: %s (%d)", strerror(-result), result);
166 }
167 status_t result = releaseBufferLocked(mPreviousBufferSlot, mPreviousBuffer);
168 ALOGE_IF(result != NO_ERROR, "onFrameCommitted: error releasing buffer:"
169 " %s (%d)", strerror(-result), result);
170
171 mPreviousBuffer.clear();
172 mHasPendingRelease = false;
173 }
174 }
175
dumpAsString(String8 & result) const176 void FramebufferSurface::dumpAsString(String8& result) const {
177 Mutex::Autolock lock(mMutex);
178 result.appendFormat(" FramebufferSurface: dataspace: %s(%d)\n",
179 dataspaceDetails(static_cast<android_dataspace>(mDataSpace)).c_str(),
180 mDataSpace);
181 ConsumerBase::dumpLocked(result, " ");
182 }
183
dumpLocked(String8 & result,const char * prefix) const184 void FramebufferSurface::dumpLocked(String8& result, const char* prefix) const
185 {
186 ConsumerBase::dumpLocked(result, prefix);
187 }
188
getClientTargetAcquireFence() const189 const sp<Fence>& FramebufferSurface::getClientTargetAcquireFence() const {
190 return mCurrentFence;
191 }
192
193 // ----------------------------------------------------------------------------
194 }; // namespace android
195 // ----------------------------------------------------------------------------
196