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 }
110 return result;
111 #else
112 // Once we remove FB HAL support, we can call nextBuffer() from here
113 // instead of using onFrameAvailable(). No real benefit, except it'll be
114 // more like VirtualDisplaySurface.
115 return NO_ERROR;
116 #endif
117 }
118
119 #ifdef USE_HWC2
nextBuffer(uint32_t & outSlot,sp<GraphicBuffer> & outBuffer,sp<Fence> & outFence,android_dataspace_t & outDataspace)120 status_t FramebufferSurface::nextBuffer(uint32_t& outSlot,
121 sp<GraphicBuffer>& outBuffer, sp<Fence>& outFence,
122 android_dataspace_t& outDataspace) {
123 #else
124 status_t FramebufferSurface::nextBuffer(sp<GraphicBuffer>& outBuffer, sp<Fence>& outFence) {
125 #endif
126 Mutex::Autolock lock(mMutex);
127
128 BufferItem item;
129 status_t err = acquireBufferLocked(&item, 0);
130 if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
131 #ifdef USE_HWC2
132 mHwcBufferCache.getHwcBuffer(mCurrentBufferSlot, mCurrentBuffer,
133 &outSlot, &outBuffer);
134 #else
135 outBuffer = mCurrentBuffer;
136 #endif
137 return NO_ERROR;
138 } else if (err != NO_ERROR) {
139 ALOGE("error acquiring buffer: %s (%d)", strerror(-err), err);
140 return err;
141 }
142
143 // If the BufferQueue has freed and reallocated a buffer in mCurrentSlot
144 // then we may have acquired the slot we already own. If we had released
145 // our current buffer before we call acquireBuffer then that release call
146 // would have returned STALE_BUFFER_SLOT, and we would have called
147 // freeBufferLocked on that slot. Because the buffer slot has already
148 // been overwritten with the new buffer all we have to do is skip the
149 // releaseBuffer call and we should be in the same state we'd be in if we
150 // had released the old buffer first.
151 if (mCurrentBufferSlot != BufferQueue::INVALID_BUFFER_SLOT &&
152 item.mSlot != mCurrentBufferSlot) {
153 #ifdef USE_HWC2
154 mHasPendingRelease = true;
155 mPreviousBufferSlot = mCurrentBufferSlot;
156 mPreviousBuffer = mCurrentBuffer;
157 #else
158 // Release the previous buffer.
159 err = releaseBufferLocked(mCurrentBufferSlot, mCurrentBuffer,
160 EGL_NO_DISPLAY, EGL_NO_SYNC_KHR);
161 if (err < NO_ERROR) {
162 ALOGE("error releasing buffer: %s (%d)", strerror(-err), err);
163 return err;
164 }
165 #endif
166 }
167 mCurrentBufferSlot = item.mSlot;
168 mCurrentBuffer = mSlots[mCurrentBufferSlot].mGraphicBuffer;
169 mCurrentFence = item.mFence;
170
171 outFence = item.mFence;
172 #ifdef USE_HWC2
173 mHwcBufferCache.getHwcBuffer(mCurrentBufferSlot, mCurrentBuffer,
174 &outSlot, &outBuffer);
175 outDataspace = item.mDataSpace;
176 status_t result =
177 mHwc.setClientTarget(mDisplayType, outSlot, outFence, outBuffer, outDataspace);
178 if (result != NO_ERROR) {
179 ALOGE("error posting framebuffer: %d", result);
180 return result;
181 }
182 #else
183 outBuffer = mCurrentBuffer;
184 #endif
185
186 return NO_ERROR;
187 }
188
189 #ifndef USE_HWC2
190 // Overrides ConsumerBase::onFrameAvailable(), does not call base class impl.
191 void FramebufferSurface::onFrameAvailable(const BufferItem& /* item */) {
192 sp<GraphicBuffer> buf;
193 sp<Fence> acquireFence;
194 status_t err = nextBuffer(buf, acquireFence);
195 if (err != NO_ERROR) {
196 ALOGE("error latching nnext FramebufferSurface buffer: %s (%d)",
197 strerror(-err), err);
198 return;
199 }
200 err = mHwc.fbPost(mDisplayType, acquireFence, buf);
201 if (err != NO_ERROR) {
202 ALOGE("error posting framebuffer: %d", err);
203 }
204 }
205 #endif
206
207 void FramebufferSurface::freeBufferLocked(int slotIndex) {
208 ConsumerBase::freeBufferLocked(slotIndex);
209 if (slotIndex == mCurrentBufferSlot) {
210 mCurrentBufferSlot = BufferQueue::INVALID_BUFFER_SLOT;
211 }
212 }
213
214 void FramebufferSurface::onFrameCommitted() {
215 #ifdef USE_HWC2
216 if (mHasPendingRelease) {
217 sp<Fence> fence = mHwc.getPresentFence(mDisplayType);
218 if (fence->isValid()) {
219 status_t result = addReleaseFence(mPreviousBufferSlot,
220 mPreviousBuffer, fence);
221 ALOGE_IF(result != NO_ERROR, "onFrameCommitted: failed to add the"
222 " fence: %s (%d)", strerror(-result), result);
223 }
224 status_t result = releaseBufferLocked(mPreviousBufferSlot,
225 mPreviousBuffer, EGL_NO_DISPLAY, EGL_NO_SYNC_KHR);
226 ALOGE_IF(result != NO_ERROR, "onFrameCommitted: error releasing buffer:"
227 " %s (%d)", strerror(-result), result);
228
229 mPreviousBuffer.clear();
230 mHasPendingRelease = false;
231 }
232 #else
233 sp<Fence> fence = mHwc.getAndResetReleaseFence(mDisplayType);
234 if (fence->isValid() &&
235 mCurrentBufferSlot != BufferQueue::INVALID_BUFFER_SLOT) {
236 status_t err = addReleaseFence(mCurrentBufferSlot,
237 mCurrentBuffer, fence);
238 ALOGE_IF(err, "setReleaseFenceFd: failed to add the fence: %s (%d)",
239 strerror(-err), err);
240 }
241 #endif
242 }
243
244 #ifndef USE_HWC2
245 status_t FramebufferSurface::compositionComplete()
246 {
247 return mHwc.fbCompositionComplete();
248 }
249 #endif
250
251 void FramebufferSurface::dumpAsString(String8& result) const {
252 ConsumerBase::dumpState(result);
253 }
254
255 void FramebufferSurface::dumpLocked(String8& result, const char* prefix) const
256 {
257 #ifndef USE_HWC2
258 mHwc.fbDump(result);
259 #endif
260 ConsumerBase::dumpLocked(result, prefix);
261 }
262
263 const sp<Fence>& FramebufferSurface::getClientTargetAcquireFence() const {
264 return mCurrentFence;
265 }
266
267 // ----------------------------------------------------------------------------
268 }; // namespace android
269 // ----------------------------------------------------------------------------
270