SurfaceFlingerConsumer.cpp revision c5d7b7d323bba8772a9005f7d300ad983a04733a 
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 <private/gui/SyncFeatures.h>
23
24#include <utils/Trace.h>
25#include <utils/Errors.h>
26
27namespace android {
28
29// ---------------------------------------------------------------------------
30
31status_t SurfaceFlingerConsumer::updateTexImage(BufferRejecter* rejecter)
32{
33    ATRACE_CALL();
34    ALOGV("updateTexImage");
35    Mutex::Autolock lock(mMutex);
36
37    if (mAbandoned) {
38        ALOGE("updateTexImage: GLConsumer is abandoned!");
39        return NO_INIT;
40    }
41
42    // Make sure the EGL state is the same as in previous calls.
43    status_t err = checkAndUpdateEglStateLocked();
44    if (err != NO_ERROR) {
45        return err;
46    }
47
48    BufferQueue::BufferItem item;
49
50    // Acquire the next buffer.
51    // In asynchronous mode the list is guaranteed to be one buffer
52    // deep, while in synchronous mode we use the oldest buffer.
53    err = acquireBufferLocked(&item);
54    if (err != NO_ERROR) {
55        if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
56            // This variant of updateTexImage does not guarantee that the
57            // texture is bound, so no need to call glBindTexture.
58            err = NO_ERROR;
59        } else {
60            ALOGE("updateTexImage: acquire failed: %s (%d)",
61                strerror(-err), err);
62        }
63        return err;
64    }
65
66
67    // We call the rejecter here, in case the caller has a reason to
68    // not accept this buffer.  This is used by SurfaceFlinger to
69    // reject buffers which have the wrong size
70    int buf = item.mBuf;
71    if (rejecter && rejecter->reject(mSlots[buf].mGraphicBuffer, item)) {
72        releaseBufferLocked(buf, item.mGraphicBuffer, EGL_NO_SYNC_KHR);
73        return NO_ERROR;
74    }
75
76    // Release the previous buffer.
77    err = releaseAndUpdateLocked(item);
78    if (err != NO_ERROR) {
79        return err;
80    }
81
82    if (!SyncFeatures::getInstance().useNativeFenceSync()) {
83        // Bind the new buffer to the GL texture.
84        //
85        // Older devices require the "implicit" synchronization provided
86        // by glEGLImageTargetTexture2DOES, which this method calls.  Newer
87        // devices will either call this in Layer::onDraw, or (if it's not
88        // a GL-composited layer) not at all.
89        err = bindTextureImageLocked();
90    }
91
92    return err;
93}
94
95status_t SurfaceFlingerConsumer::bindTextureImage()
96{
97    Mutex::Autolock lock(mMutex);
98
99    return bindTextureImageLocked();
100}
101
102// ---------------------------------------------------------------------------
103}; // namespace android
104
105