SurfaceControl.cpp revision acbe67888f0bd65d5400400f0115bae6bd6199dc 
1/*
2 * Copyright (C) 2007 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 LOG_TAG "SurfaceControl"
18
19#include <stdint.h>
20#include <errno.h>
21#include <sys/types.h>
22#include <sys/stat.h>
23
24#include <android/native_window.h>
25
26#include <utils/Errors.h>
27#include <utils/Log.h>
28#include <utils/threads.h>
29
30#include <binder/IPCThreadState.h>
31
32#include <ui/DisplayInfo.h>
33#include <ui/GraphicBuffer.h>
34#include <ui/Rect.h>
35
36#include <gui/BufferQueueCore.h>
37#include <gui/ISurfaceComposer.h>
38#include <gui/Surface.h>
39#include <gui/SurfaceComposerClient.h>
40#include <gui/SurfaceControl.h>
41
42namespace android {
43
44// ============================================================================
45//  SurfaceControl
46// ============================================================================
47
48SurfaceControl::SurfaceControl(
49        const sp<SurfaceComposerClient>& client,
50        const sp<IBinder>& handle,
51        const sp<IGraphicBufferProducer>& gbp)
52    : mClient(client), mHandle(handle), mGraphicBufferProducer(gbp)
53{
54}
55
56SurfaceControl::~SurfaceControl()
57{
58    destroy();
59}
60
61void SurfaceControl::destroy()
62{
63    if (isValid()) {
64        mClient->destroySurface(mHandle);
65    }
66    // clear all references and trigger an IPC now, to make sure things
67    // happen without delay, since these resources are quite heavy.
68    mClient.clear();
69    mHandle.clear();
70    mGraphicBufferProducer.clear();
71    IPCThreadState::self()->flushCommands();
72}
73
74void SurfaceControl::clear()
75{
76    // here, the window manager tells us explicitly that we should destroy
77    // the surface's resource. Soon after this call, it will also release
78    // its last reference (which will call the dtor); however, it is possible
79    // that a client living in the same process still holds references which
80    // would delay the call to the dtor -- that is why we need this explicit
81    // "clear()" call.
82    destroy();
83}
84
85void SurfaceControl::disconnect() {
86    if (mGraphicBufferProducer != NULL) {
87        mGraphicBufferProducer->disconnect(
88                BufferQueueCore::CURRENTLY_CONNECTED_API);
89    }
90}
91
92bool SurfaceControl::isSameSurface(
93        const sp<SurfaceControl>& lhs, const sp<SurfaceControl>& rhs)
94{
95    if (lhs == 0 || rhs == 0)
96        return false;
97    return lhs->mHandle == rhs->mHandle;
98}
99
100status_t SurfaceControl::setLayerStack(uint32_t layerStack) {
101    status_t err = validate();
102    if (err < 0) return err;
103    return mClient->setLayerStack(mHandle, layerStack);
104}
105status_t SurfaceControl::setLayer(uint32_t layer) {
106    status_t err = validate();
107    if (err < 0) return err;
108    return mClient->setLayer(mHandle, layer);
109}
110status_t SurfaceControl::setPosition(float x, float y) {
111    status_t err = validate();
112    if (err < 0) return err;
113    return mClient->setPosition(mHandle, x, y);
114}
115status_t SurfaceControl::setSize(uint32_t w, uint32_t h) {
116    status_t err = validate();
117    if (err < 0) return err;
118    return mClient->setSize(mHandle, w, h);
119}
120status_t SurfaceControl::hide() {
121    status_t err = validate();
122    if (err < 0) return err;
123    return mClient->hide(mHandle);
124}
125status_t SurfaceControl::show() {
126    status_t err = validate();
127    if (err < 0) return err;
128    return mClient->show(mHandle);
129}
130status_t SurfaceControl::setFlags(uint32_t flags, uint32_t mask) {
131    status_t err = validate();
132    if (err < 0) return err;
133    return mClient->setFlags(mHandle, flags, mask);
134}
135status_t SurfaceControl::setTransparentRegionHint(const Region& transparent) {
136    status_t err = validate();
137    if (err < 0) return err;
138    return mClient->setTransparentRegionHint(mHandle, transparent);
139}
140status_t SurfaceControl::setAlpha(float alpha) {
141    status_t err = validate();
142    if (err < 0) return err;
143    return mClient->setAlpha(mHandle, alpha);
144}
145status_t SurfaceControl::setMatrix(float dsdx, float dtdx, float dsdy, float dtdy) {
146    status_t err = validate();
147    if (err < 0) return err;
148    return mClient->setMatrix(mHandle, dsdx, dtdx, dsdy, dtdy);
149}
150status_t SurfaceControl::setCrop(const Rect& crop) {
151    status_t err = validate();
152    if (err < 0) return err;
153    return mClient->setCrop(mHandle, crop);
154}
155status_t SurfaceControl::setFinalCrop(const Rect& crop) {
156    status_t err = validate();
157    if (err < 0) return err;
158    return mClient->setFinalCrop(mHandle, crop);
159}
160
161status_t SurfaceControl::deferTransactionUntil(sp<IBinder> handle,
162        uint64_t frameNumber) {
163    status_t err = validate();
164    if (err < 0) return err;
165    return mClient->deferTransactionUntil(mHandle, handle, frameNumber);
166}
167
168status_t SurfaceControl::clearLayerFrameStats() const {
169    status_t err = validate();
170    if (err < 0) return err;
171    const sp<SurfaceComposerClient>& client(mClient);
172    return client->clearLayerFrameStats(mHandle);
173}
174
175status_t SurfaceControl::getLayerFrameStats(FrameStats* outStats) const {
176    status_t err = validate();
177    if (err < 0) return err;
178    const sp<SurfaceComposerClient>& client(mClient);
179    return client->getLayerFrameStats(mHandle, outStats);
180}
181
182status_t SurfaceControl::validate() const
183{
184    if (mHandle==0 || mClient==0) {
185        ALOGE("invalid handle (%p) or client (%p)",
186                mHandle.get(), mClient.get());
187        return NO_INIT;
188    }
189    return NO_ERROR;
190}
191
192status_t SurfaceControl::writeSurfaceToParcel(
193        const sp<SurfaceControl>& control, Parcel* parcel)
194{
195    sp<IGraphicBufferProducer> bp;
196    if (control != NULL) {
197        bp = control->mGraphicBufferProducer;
198    }
199    return parcel->writeStrongBinder(IInterface::asBinder(bp));
200}
201
202sp<Surface> SurfaceControl::getSurface() const
203{
204    Mutex::Autolock _l(mLock);
205    if (mSurfaceData == 0) {
206        // This surface is always consumed by SurfaceFlinger, so the
207        // producerControlledByApp value doesn't matter; using false.
208        mSurfaceData = new Surface(mGraphicBufferProducer, false);
209    }
210    return mSurfaceData;
211}
212
213sp<IBinder> SurfaceControl::getHandle() const
214{
215    Mutex::Autolock lock(mLock);
216    return mHandle;
217}
218
219// ----------------------------------------------------------------------------
220}; // namespace android
221