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
FramebufferSurface(HWComposer & hwc,int disp,const sp<IGraphicBufferConsumer> & consumer)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
beginFrame(bool)91 status_t FramebufferSurface::beginFrame(bool /*mustRecompose*/) {
92 return NO_ERROR;
93 }
94
prepareFrame(CompositionType)95 status_t FramebufferSurface::prepareFrame(CompositionType /*compositionType*/) {
96 return NO_ERROR;
97 }
98
advanceFrame()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
nextBuffer(uint32_t & outSlot,sp<GraphicBuffer> & outBuffer,sp<Fence> & outFence,android_dataspace_t & outDataspace)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