SurfaceFlingerConsumer.cpp revision 1df8c345854155cbbcb9f80de9d12d66ea70ac08 
1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define ATRACE_TAG ATRACE_TAG_GRAPHICS
18//#define LOG_NDEBUG 0
19
20#include "SurfaceFlingerConsumer.h"
21
22#include <utils/Trace.h>
23#include <utils/Errors.h>
24
25
26namespace android {
27
28// ---------------------------------------------------------------------------
29
30status_t SurfaceFlingerConsumer::updateTexImage(BufferRejecter* rejecter)
31{
32    ATRACE_CALL();
33    ALOGV("updateTexImage");
34    Mutex::Autolock lock(mMutex);
35
36    if (mAbandoned) {
37        ALOGE("updateTexImage: GLConsumer is abandoned!");
38        return NO_INIT;
39    }
40
41    // Make sure the EGL state is the same as in previous calls.
42    status_t err = checkAndUpdateEglStateLocked();
43    if (err != NO_ERROR) {
44        return err;
45    }
46
47    BufferQueue::BufferItem item;
48
49    // Acquire the next buffer.
50    // In asynchronous mode the list is guaranteed to be one buffer
51    // deep, while in synchronous mode we use the oldest buffer.
52    err = acquireBufferLocked(&item);
53    if (err != NO_ERROR) {
54        if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
55            // This variant of updateTexImage does not guarantee that the
56            // texture is bound, so no need to call glBindTexture.
57            err = NO_ERROR;
58        } else {
59            ALOGE("updateTexImage: acquire failed: %s (%d)",
60                strerror(-err), err);
61        }
62        return err;
63    }
64
65
66    // We call the rejecter here, in case the caller has a reason to
67    // not accept this buffer.  This is used by SurfaceFlinger to
68    // reject buffers which have the wrong size
69    int buf = item.mBuf;
70    if (rejecter && rejecter->reject(mSlots[buf].mGraphicBuffer, item)) {
71        releaseBufferLocked(buf, EGL_NO_SYNC_KHR);
72        return NO_ERROR;
73    }
74
75    // Release the previous buffer.
76    err = releaseAndUpdateLocked(item);
77    if (err != NO_ERROR) {
78        return err;
79    }
80
81    if (!sUseNativeFenceSync) {
82        // Bind the new buffer to the GL texture.
83        //
84        // Older devices require the "implicit" synchronization provided
85        // by glEGLImageTargetTexture2DOES, which this method calls.  Newer
86        // devices will either call this in Layer::onDraw, or (if it's not
87        // a GL-composited layer) not at all.
88        err = bindTextureImageLocked();
89    }
90
91    return err;
92}
93
94status_t SurfaceFlingerConsumer::bindTextureImage()
95{
96    Mutex::Autolock lock(mMutex);
97
98    return bindTextureImageLocked();
99}
100
101// ---------------------------------------------------------------------------
102}; // namespace android
103
104