replicant-frameworks_native/libs/surfaceflinger_client/SurfaceComposerClient.cpp

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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "SurfaceComposerClient"
#include <stdint.h>
#include <sys/types.h>
#include <utils/Errors.h>
#include <utils/threads.h>
#include <utils/SortedVector.h>
#include <utils/Log.h>
#include <utils/Singleton.h>
#include <binder/IServiceManager.h>
#include <binder/IMemory.h>
#include <ui/DisplayInfo.h>
#include <surfaceflinger/ISurfaceComposer.h>
#include <surfaceflinger/ISurfaceFlingerClient.h>
#include <surfaceflinger/ISurface.h>
#include <surfaceflinger/SurfaceComposerClient.h>
#include <private/surfaceflinger/LayerState.h>
#include <private/surfaceflinger/SharedBufferStack.h>
namespace android {
// ---------------------------------------------------------------------------
class Composer : public Singleton<Composer>
{
// these are constants
sp<ISurfaceComposer> mComposerService;
sp<IMemoryHeap> mServerCblkMemory;
surface_flinger_cblk_t volatile* mServerCblk;
Mutex mLock;
SortedVector< wp<SurfaceComposerClient> > mActiveConnections;
SortedVector<sp<SurfaceComposerClient> > mOpenTransactions;
Composer() : Singleton<Composer>() {
const String16 name("SurfaceFlinger");
while (getService(name, &mComposerService) != NO_ERROR) {
usleep(250000);
}
mServerCblkMemory = mComposerService->getCblk();
mServerCblk = static_cast<surface_flinger_cblk_t volatile *>(
mServerCblkMemory->getBase());
}
void addClientImpl(const sp<SurfaceComposerClient>& client) {
Mutex::Autolock _l(mLock);
mActiveConnections.add(client);
}
void removeClientImpl(const sp<SurfaceComposerClient>& client) {
Mutex::Autolock _l(mLock);
mActiveConnections.remove(client);
}
void openGlobalTransactionImpl()
{
Mutex::Autolock _l(mLock);
if (mOpenTransactions.size()) {
LOGE("openGlobalTransaction() called more than once. skipping.");
return;
}
const size_t N = mActiveConnections.size();
for (size_t i=0; i<N; i++) {
sp<SurfaceComposerClient> client(mActiveConnections[i].promote());
if (client != 0 && mOpenTransactions.indexOf(client) < 0) {
if (client->openTransaction() == NO_ERROR) {
mOpenTransactions.add(client);
} else {
LOGE("openTransaction on client %p failed", client.get());
// let it go, it'll fail later when the user
// tries to do something with the transaction
}
}
}
}
void closeGlobalTransactionImpl()
{
mLock.lock();
SortedVector< sp<SurfaceComposerClient> > clients(mOpenTransactions);
mOpenTransactions.clear();
mLock.unlock();
sp<ISurfaceComposer> sm(mComposerService);
sm->openGlobalTransaction();
const size_t N = clients.size();
for (size_t i=0; i<N; i++) {
clients[i]->closeTransaction();
}
sm->closeGlobalTransaction();
}
friend class Singleton<Composer>;
public:
static sp<ISurfaceComposer> getComposerService() {
return Composer::getInstance().mComposerService;
}
static surface_flinger_cblk_t const volatile * getControlBlock() {
return Composer::getInstance().mServerCblk;
}
static void addClient(const sp<SurfaceComposerClient>& client) {
Composer::getInstance().addClientImpl(client);
}
static void removeClient(const sp<SurfaceComposerClient>& client) {
Composer::getInstance().removeClientImpl(client);
}
static void openGlobalTransaction() {
Composer::getInstance().openGlobalTransactionImpl();
}
static void closeGlobalTransaction() {
Composer::getInstance().closeGlobalTransactionImpl();
}
};
ANDROID_SINGLETON_STATIC_INSTANCE(Composer);
static inline sp<ISurfaceComposer> getComposerService() {
return Composer::getComposerService();
}
static inline surface_flinger_cblk_t const volatile * get_cblk() {
return Composer::getControlBlock();
}
// ---------------------------------------------------------------------------
static inline int compare_type( const layer_state_t& lhs,
const layer_state_t& rhs) {
if (lhs.surface < rhs.surface) return -1;
if (lhs.surface > rhs.surface) return 1;
return 0;
}
SurfaceComposerClient::SurfaceComposerClient()
: mTransactionOpen(0), mPrebuiltLayerState(0), mStatus(NO_INIT)
{
}
void SurfaceComposerClient::onFirstRef()
{
sp<ISurfaceComposer> sm(getComposerService());
if (sm != 0) {
sp<ISurfaceFlingerClient> conn = sm->createConnection();
if (conn != 0) {
mClient = conn;
Composer::addClient(this);
mPrebuiltLayerState = new layer_state_t;
mStatus = NO_ERROR;
}
}
}
SurfaceComposerClient::~SurfaceComposerClient()
{
delete mPrebuiltLayerState;
dispose();
}
status_t SurfaceComposerClient::initCheck() const
{
return mStatus;
}
sp<IBinder> SurfaceComposerClient::connection() const
{
return (mClient != 0) ? mClient->asBinder() : 0;
}
status_t SurfaceComposerClient::linkToComposerDeath(
const sp<IBinder::DeathRecipient>& recipient,
void* cookie, uint32_t flags)
{
sp<ISurfaceComposer> sm(getComposerService());
return sm->asBinder()->linkToDeath(recipient, cookie, flags);
}
void SurfaceComposerClient::dispose()
{
// this can be called more than once.
sp<ISurfaceFlingerClient> client;
Mutex::Autolock _lm(mLock);
if (mClient != 0) {
Composer::removeClient(this);
client = mClient; // hold ref while lock is held
mClient.clear();
}
mStatus = NO_INIT;
}
status_t SurfaceComposerClient::getDisplayInfo(
DisplayID dpy, DisplayInfo* info)
{
if (uint32_t(dpy)>=SharedBufferStack::NUM_DISPLAY_MAX)
return BAD_VALUE;
volatile surface_flinger_cblk_t const * cblk = get_cblk();
volatile display_cblk_t const * dcblk = cblk->displays + dpy;
info->w = dcblk->w;
info->h = dcblk->h;
info->orientation = dcblk->orientation;
info->xdpi = dcblk->xdpi;
info->ydpi = dcblk->ydpi;
info->fps = dcblk->fps;
info->density = dcblk->density;
return getPixelFormatInfo(dcblk->format, &(info->pixelFormatInfo));
}
ssize_t SurfaceComposerClient::getDisplayWidth(DisplayID dpy)
{
if (uint32_t(dpy)>=SharedBufferStack::NUM_DISPLAY_MAX)
return BAD_VALUE;
volatile surface_flinger_cblk_t const * cblk = get_cblk();
volatile display_cblk_t const * dcblk = cblk->displays + dpy;
return dcblk->w;
}
ssize_t SurfaceComposerClient::getDisplayHeight(DisplayID dpy)
{
if (uint32_t(dpy)>=SharedBufferStack::NUM_DISPLAY_MAX)
return BAD_VALUE;
volatile surface_flinger_cblk_t const * cblk = get_cblk();
volatile display_cblk_t const * dcblk = cblk->displays + dpy;
return dcblk->h;
}
ssize_t SurfaceComposerClient::getDisplayOrientation(DisplayID dpy)
{
if (uint32_t(dpy)>=SharedBufferStack::NUM_DISPLAY_MAX)
return BAD_VALUE;
volatile surface_flinger_cblk_t const * cblk = get_cblk();
volatile display_cblk_t const * dcblk = cblk->displays + dpy;
return dcblk->orientation;
}
ssize_t SurfaceComposerClient::getNumberOfDisplays()
{
volatile surface_flinger_cblk_t const * cblk = get_cblk();
uint32_t connected = cblk->connected;
int n = 0;
while (connected) {
if (connected&1) n++;
connected >>= 1;
}
return n;
}
sp<SurfaceControl> SurfaceComposerClient::createSurface(
int pid,
DisplayID display,
uint32_t w,
uint32_t h,
PixelFormat format,
uint32_t flags)
{
String8 name;
const size_t SIZE = 128;
char buffer[SIZE];
snprintf(buffer, SIZE, "<pid_%d>", getpid());
name.append(buffer);
return SurfaceComposerClient::createSurface(pid, name, display,
w, h, format, flags);
}
sp<SurfaceControl> SurfaceComposerClient::createSurface(
int pid,
const String8& name,
DisplayID display,
uint32_t w,
uint32_t h,
PixelFormat format,
uint32_t flags)
{
sp<SurfaceControl> result;
if (mStatus == NO_ERROR) {
ISurfaceFlingerClient::surface_data_t data;
sp<ISurface> surface = mClient->createSurface(&data, pid, name,
display, w, h, format, flags);
if (surface != 0) {
if (uint32_t(data.token) < SharedBufferStack::NUM_LAYERS_MAX) {
result = new SurfaceControl(this, surface, data, w, h, format, flags);
}
}
}
return result;
}
status_t SurfaceComposerClient::destroySurface(SurfaceID sid)
{
if (mStatus != NO_ERROR)
return mStatus;
// it's okay to destroy a surface while a transaction is open,
// (transactions really are a client-side concept)
// however, this indicates probably a misuse of the API or a bug
// in the client code.
LOGW_IF(mTransactionOpen,
"Destroying surface while a transaction is open. "
"Client %p: destroying surface %d, mTransactionOpen=%d",
this, sid, mTransactionOpen);
status_t err = mClient->destroySurface(sid);
return err;
}
void SurfaceComposerClient::openGlobalTransaction()
{
Composer::openGlobalTransaction();
}
void SurfaceComposerClient::closeGlobalTransaction()
{
Composer::closeGlobalTransaction();
}
status_t SurfaceComposerClient::freezeDisplay(DisplayID dpy, uint32_t flags)
{
sp<ISurfaceComposer> sm(getComposerService());
return sm->freezeDisplay(dpy, flags);
}
status_t SurfaceComposerClient::unfreezeDisplay(DisplayID dpy, uint32_t flags)
{
sp<ISurfaceComposer> sm(getComposerService());
return sm->unfreezeDisplay(dpy, flags);
}
int SurfaceComposerClient::setOrientation(DisplayID dpy,
int orientation, uint32_t flags)
{
sp<ISurfaceComposer> sm(getComposerService());
return sm->setOrientation(dpy, orientation, flags);
}
status_t SurfaceComposerClient::openTransaction()
{
if (mStatus != NO_ERROR)
return mStatus;
Mutex::Autolock _l(mLock);
mTransactionOpen++;
return NO_ERROR;
}
status_t SurfaceComposerClient::closeTransaction()
{
if (mStatus != NO_ERROR)
return mStatus;
Mutex::Autolock _l(mLock);
if (mTransactionOpen <= 0) {
LOGE( "closeTransaction (client %p, mTransactionOpen=%d) "
"called more times than openTransaction()",
this, mTransactionOpen);
return INVALID_OPERATION;
}
if (mTransactionOpen >= 2) {
mTransactionOpen--;
return NO_ERROR;
}
mTransactionOpen = 0;
const ssize_t count = mStates.size();
if (count) {
mClient->setState(count, mStates.array());
mStates.clear();
}
return NO_ERROR;
}
layer_state_t* SurfaceComposerClient::get_state_l(SurfaceID index)
{
// API usage error, do nothing.
if (mTransactionOpen<=0) {
LOGE("Not in transaction (client=%p, SurfaceID=%d, mTransactionOpen=%d",
this, int(index), mTransactionOpen);
return 0;
}
// use mPrebuiltLayerState just to find out if we already have it
layer_state_t& dummy(*mPrebuiltLayerState);
dummy.surface = index;
ssize_t i = mStates.indexOf(dummy);
if (i < 0) {
// we don't have it, add an initialized layer_state to our list
i = mStates.add(dummy);
}
return mStates.editArray() + i;
}
layer_state_t* SurfaceComposerClient::lockLayerState(SurfaceID id)
{
layer_state_t* s;
mLock.lock();
s = get_state_l(id);
if (!s) mLock.unlock();
return s;
}
void SurfaceComposerClient::unlockLayerState()
{
mLock.unlock();
}
status_t SurfaceComposerClient::setPosition(SurfaceID id, int32_t x, int32_t y)
{
layer_state_t* s = lockLayerState(id);
if (!s) return BAD_INDEX;
s->what |= ISurfaceComposer::ePositionChanged;
s->x = x;
s->y = y;
unlockLayerState();
return NO_ERROR;
}
status_t SurfaceComposerClient::setSize(SurfaceID id, uint32_t w, uint32_t h)
{
layer_state_t* s = lockLayerState(id);
if (!s) return BAD_INDEX;
s->what |= ISurfaceComposer::eSizeChanged;
s->w = w;
s->h = h;
unlockLayerState();
return NO_ERROR;
}
status_t SurfaceComposerClient::setLayer(SurfaceID id, int32_t z)
{
layer_state_t* s = lockLayerState(id);
if (!s) return BAD_INDEX;
s->what |= ISurfaceComposer::eLayerChanged;
s->z = z;
unlockLayerState();
return NO_ERROR;
}
status_t SurfaceComposerClient::hide(SurfaceID id)
{
return setFlags(id, ISurfaceComposer::eLayerHidden,
ISurfaceComposer::eLayerHidden);
}
status_t SurfaceComposerClient::show(SurfaceID id, int32_t)
{
return setFlags(id, 0, ISurfaceComposer::eLayerHidden);
}
status_t SurfaceComposerClient::freeze(SurfaceID id)
{
return setFlags(id, ISurfaceComposer::eLayerFrozen,
ISurfaceComposer::eLayerFrozen);
}
status_t SurfaceComposerClient::unfreeze(SurfaceID id)
{
return setFlags(id, 0, ISurfaceComposer::eLayerFrozen);
}
status_t SurfaceComposerClient::setFlags(SurfaceID id,
uint32_t flags, uint32_t mask)
{
layer_state_t* s = lockLayerState(id);
if (!s) return BAD_INDEX;
s->what |= ISurfaceComposer::eVisibilityChanged;
s->flags &= ~mask;
s->flags |= (flags & mask);
s->mask |= mask;
unlockLayerState();
return NO_ERROR;
}
status_t SurfaceComposerClient::setTransparentRegionHint(
SurfaceID id, const Region& transparentRegion)
{
layer_state_t* s = lockLayerState(id);
if (!s) return BAD_INDEX;
s->what |= ISurfaceComposer::eTransparentRegionChanged;
s->transparentRegion = transparentRegion;
unlockLayerState();
return NO_ERROR;
}
status_t SurfaceComposerClient::setAlpha(SurfaceID id, float alpha)
{
layer_state_t* s = lockLayerState(id);
if (!s) return BAD_INDEX;
s->what |= ISurfaceComposer::eAlphaChanged;
s->alpha = alpha;
unlockLayerState();
return NO_ERROR;
}
status_t SurfaceComposerClient::setMatrix(
SurfaceID id,
float dsdx, float dtdx,
float dsdy, float dtdy )
{
layer_state_t* s = lockLayerState(id);
if (!s) return BAD_INDEX;
s->what |= ISurfaceComposer::eMatrixChanged;
layer_state_t::matrix22_t matrix;
matrix.dsdx = dsdx;
matrix.dtdx = dtdx;
matrix.dsdy = dsdy;
matrix.dtdy = dtdy;
s->matrix = matrix;
unlockLayerState();
return NO_ERROR;
}
status_t SurfaceComposerClient::setFreezeTint(SurfaceID id, uint32_t tint)
{
layer_state_t* s = lockLayerState(id);
if (!s) return BAD_INDEX;
s->what |= ISurfaceComposer::eFreezeTintChanged;
s->tint = tint;
unlockLayerState();
return NO_ERROR;
}
// ----------------------------------------------------------------------------
SurfaceClient::SurfaceClient(const sp<SurfaceComposerClient>& client)
: mStatus(NO_INIT), mControl(0)
{
if (client != 0) {
sp<IBinder> conn = client->connection();
init(conn);
}
}
SurfaceClient::SurfaceClient(const sp<IBinder>& conn)
: mStatus(NO_INIT), mControl(0)
{
init(conn);
}
void SurfaceClient::init(const sp<IBinder>& conn)
{
mSignalServer = getComposerService();
sp<ISurfaceFlingerClient> sf(interface_cast<ISurfaceFlingerClient>(conn));
if (sf != 0) {
mConnection = conn;
mControlMemory = sf->getControlBlock();
mControl = static_cast<SharedClient *>(mControlMemory->getBase());
mStatus = NO_ERROR;
}
}
status_t SurfaceClient::initCheck() const {
return mStatus;
}
SharedClient* SurfaceClient::getSharedClient() const {
return mControl;
}
void SurfaceClient::signalServer() const {
mSignalServer->signal();
}
// ----------------------------------------------------------------------------
}; // namespace android