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replicant-frameworks_native/libs/ui/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 <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <cutils/memory.h>
#include <utils/Atomic.h>
#include <utils/Errors.h>
#include <utils/threads.h>
#include <utils/KeyedVector.h>
#include <binder/IServiceManager.h>
#include <binder/IMemory.h>
#include <utils/Log.h>
#include <ui/DisplayInfo.h>
#include <ui/ISurfaceComposer.h>
#include <ui/ISurfaceFlingerClient.h>
#include <ui/ISurface.h>
#include <ui/SurfaceComposerClient.h>
#include <ui/Rect.h>
#include <private/ui/SharedState.h>
#include <private/ui/LayerState.h>
#include <private/ui/SurfaceFlingerSynchro.h>
#define VERBOSE(...) ((void)0)
//#define VERBOSE LOGD
#define LIKELY( exp ) (__builtin_expect( (exp) != 0, true ))
#define UNLIKELY( exp ) (__builtin_expect( (exp) != 0, false ))
namespace android {
// ---------------------------------------------------------------------------
// Must not be holding SurfaceComposerClient::mLock when acquiring gLock here.
static Mutex gLock;
static sp<ISurfaceComposer> gSurfaceManager;
static DefaultKeyedVector< sp<IBinder>, sp<SurfaceComposerClient> > gActiveConnections;
static SortedVector<sp<SurfaceComposerClient> > gOpenTransactions;
static sp<IMemoryHeap> gServerCblkMemory;
static volatile surface_flinger_cblk_t* gServerCblk;
const sp<ISurfaceComposer>& _get_surface_manager()
{
if (gSurfaceManager != 0) {
return gSurfaceManager;
}
sp<IBinder> binder;
sp<IServiceManager> sm = defaultServiceManager();
do {
binder = sm->getService(String16("SurfaceFlinger"));
if (binder == 0) {
LOGW("SurfaceFlinger not published, waiting...");
usleep(500000); // 0.5 s
}
} while(binder == 0);
sp<ISurfaceComposer> sc(interface_cast<ISurfaceComposer>(binder));
Mutex::Autolock _l(gLock);
if (gSurfaceManager == 0) {
gSurfaceManager = sc;
}
return gSurfaceManager;
}
static volatile surface_flinger_cblk_t const * get_cblk()
{
if (gServerCblk == 0) {
const sp<ISurfaceComposer>& sm(_get_surface_manager());
Mutex::Autolock _l(gLock);
if (gServerCblk == 0) {
gServerCblkMemory = sm->getCblk();
LOGE_IF(gServerCblkMemory==0, "Can't get server control block");
gServerCblk = (surface_flinger_cblk_t *)gServerCblkMemory->getBase();
LOGE_IF(gServerCblk==0, "Can't get server control block address");
}
}
return gServerCblk;
}
// ---------------------------------------------------------------------------
// these functions are used by the clients
status_t per_client_cblk_t::validate(size_t i) const {
if (uint32_t(i) >= NUM_LAYERS_MAX)
return BAD_INDEX;
if (layers[i].swapState & eInvalidSurface)
return NO_MEMORY;
return NO_ERROR;
}
int32_t per_client_cblk_t::lock_layer(size_t i, uint32_t flags)
{
int32_t index;
uint32_t state;
int timeout = 0;
status_t result;
layer_cblk_t * const layer = layers + i;
const bool blocking = flags & BLOCKING;
const bool inspect = flags & INSPECT;
do {
state = layer->swapState;
if (UNLIKELY((state&(eFlipRequested|eNextFlipPending)) == eNextFlipPending)) {
LOGE("eNextFlipPending set but eFlipRequested not set, "
"layer=%d (lcblk=%p), state=%08x",
int(i), layer, int(state));
return INVALID_OPERATION;
}
if (UNLIKELY(state&eLocked)) {
LOGE("eLocked set when entering lock_layer(), "
"layer=%d (lcblk=%p), state=%08x",
int(i), layer, int(state));
return WOULD_BLOCK;
}
if (state & (eFlipRequested | eNextFlipPending | eResizeRequested
| eInvalidSurface))
{
int32_t resizeIndex;
Mutex::Autolock _l(lock);
// might block for a very short amount of time
// will never cause the server to block (trylock())
goto start_loop_here;
// We block the client if:
// eNextFlipPending: we've used both buffers already, so we need to
// wait for one to become availlable.
// eResizeRequested: the buffer we're going to acquire is being
// resized. Block until it is done.
// eFlipRequested && eBusy: the buffer we're going to acquire is
// currently in use by the server.
// eInvalidSurface: this is a special case, we don't block in this
// case, we just return an error.
while((state & (eNextFlipPending|eInvalidSurface)) ||
(state & ((resizeIndex) ? eResizeBuffer1 : eResizeBuffer0)) ||
((state & (eFlipRequested|eBusy)) == (eFlipRequested|eBusy)) )
{
if (state & eInvalidSurface)
return NO_MEMORY;
if (!blocking)
return WOULD_BLOCK;
timeout = 0;
result = cv.waitRelative(lock, seconds(1));
if (__builtin_expect(result!=NO_ERROR, false)) {
const int newState = layer->swapState;
LOGW( "lock_layer timed out (is the CPU pegged?) "
"layer=%d, lcblk=%p, state=%08x (was %08x)",
int(i), layer, newState, int(state));
timeout = newState != int(state);
}
start_loop_here:
state = layer->swapState;
resizeIndex = (state&eIndex) ^ ((state&eFlipRequested)>>1);
}
LOGW_IF(timeout,
"lock_layer() timed out but didn't appear to need "
"to be locked and we recovered "
"(layer=%d, lcblk=%p, state=%08x)",
int(i), layer, int(state));
}
// eFlipRequested is not set and cannot be set by another thread: it's
// safe to use the first buffer without synchronization.
// Choose the index depending on eFlipRequested.
// When it's set, choose the 'other' buffer.
index = (state&eIndex) ^ ((state&eFlipRequested)>>1);
// make sure this buffer is valid
status_t err = layer->surface[index].status;
if (err < 0) {
return err;
}
if (inspect) {
// we just want to inspect this layer. don't lock it.
goto done;
}
// last thing before we're done, we need to atomically lock the state
} while (android_atomic_cmpxchg(state, state|eLocked, &(layer->swapState)));
VERBOSE("locked layer=%d (lcblk=%p), buffer=%d, state=0x%08x",
int(i), layer, int(index), int(state));
// store the index of the locked buffer (for client use only)
layer->flags &= ~eBufferIndex;
layer->flags |= ((index << eBufferIndexShift) & eBufferIndex);
done:
return index;
}
uint32_t per_client_cblk_t::unlock_layer_and_post(size_t i)
{
// atomically set eFlipRequested and clear eLocked and optionally
// set eNextFlipPending if eFlipRequested was already set
layer_cblk_t * const layer = layers + i;
int32_t oldvalue, newvalue;
do {
oldvalue = layer->swapState;
// get current value
newvalue = oldvalue & ~eLocked;
// clear eLocked
newvalue |= eFlipRequested;
// set eFlipRequested
if (oldvalue & eFlipRequested)
newvalue |= eNextFlipPending;
// if eFlipRequested was already set, set eNextFlipPending
} while (android_atomic_cmpxchg(oldvalue, newvalue, &(layer->swapState)));
VERBOSE("request pageflip for layer=%d, buffer=%d, state=0x%08x",
int(i), int((layer->flags & eBufferIndex) >> eBufferIndexShift),
int(newvalue));
// from this point, the server can kick in at any time and use the first
// buffer, so we cannot use it anymore, and we must use the 'other'
// buffer instead (or wait if it is not available yet, see lock_layer).
return newvalue;
}
void per_client_cblk_t::unlock_layer(size_t i)
{
layer_cblk_t * const layer = layers + i;
android_atomic_and(~eLocked, &layer->swapState);
}
// ---------------------------------------------------------------------------
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()
{
const sp<ISurfaceComposer>& sm(_get_surface_manager());
if (sm == 0) {
_init(0, 0);
return;
}
_init(sm, sm->createConnection());
if (mClient != 0) {
Mutex::Autolock _l(gLock);
VERBOSE("Adding client %p to map", this);
gActiveConnections.add(mClient->asBinder(), this);
}
}
SurfaceComposerClient::SurfaceComposerClient(
const sp<ISurfaceComposer>& sm, const sp<IBinder>& conn)
{
_init(sm, interface_cast<ISurfaceFlingerClient>(conn));
}
void SurfaceComposerClient::_init(
const sp<ISurfaceComposer>& sm, const sp<ISurfaceFlingerClient>& conn)
{
VERBOSE("Creating client %p, conn %p", this, conn.get());
mSignalServer = 0;
mPrebuiltLayerState = 0;
mTransactionOpen = 0;
mStatus = NO_ERROR;
mControl = 0;
mClient = conn;
if (mClient == 0) {
mStatus = NO_INIT;
return;
}
mControlMemory = mClient->getControlBlock();
mSignalServer = new SurfaceFlingerSynchro(sm);
mControl = static_cast<per_client_cblk_t *>(mControlMemory->getBase());
}
SurfaceComposerClient::~SurfaceComposerClient()
{
VERBOSE("Destroying client %p, conn %p", this, mClient.get());
dispose();
}
status_t SurfaceComposerClient::initCheck() const
{
return mStatus;
}
sp<IBinder> SurfaceComposerClient::connection() const
{
return (mClient != 0) ? mClient->asBinder() : 0;
}
sp<SurfaceComposerClient>
SurfaceComposerClient::clientForConnection(const sp<IBinder>& conn)
{
sp<SurfaceComposerClient> client;
{ // scope for lock
Mutex::Autolock _l(gLock);
client = gActiveConnections.valueFor(conn);
}
if (client == 0) {
// Need to make a new client.
const sp<ISurfaceComposer>& sm(_get_surface_manager());
client = new SurfaceComposerClient(sm, conn);
if (client != 0 && client->initCheck() == NO_ERROR) {
Mutex::Autolock _l(gLock);
gActiveConnections.add(conn, client);
//LOGD("we have %d connections", gActiveConnections.size());
} else {
client.clear();
}
}
return client;
}
void SurfaceComposerClient::dispose()
{
// this can be called more than once.
sp<IMemoryHeap> controlMemory;
sp<ISurfaceFlingerClient> client;
{
Mutex::Autolock _lg(gLock);
Mutex::Autolock _lm(mLock);
delete mSignalServer;
mSignalServer = 0;
if (mClient != 0) {
client = mClient;
mClient.clear();
ssize_t i = gActiveConnections.indexOfKey(client->asBinder());
if (i >= 0 && gActiveConnections.valueAt(i) == this) {
VERBOSE("Removing client %p from map at %d", this, int(i));
gActiveConnections.removeItemsAt(i);
}
}
delete mPrebuiltLayerState;
mPrebuiltLayerState = 0;
controlMemory = mControlMemory;
mControlMemory.clear();
mControl = 0;
mStatus = NO_INIT;
}
}
status_t SurfaceComposerClient::getDisplayInfo(
DisplayID dpy, DisplayInfo* info)
{
if (uint32_t(dpy)>=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)>=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)>=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)>=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;
}
void SurfaceComposerClient::signalServer()
{
mSignalServer->signal();
}
sp<SurfaceControl> SurfaceComposerClient::createSurface(
int pid,
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,
display, w, h, format, flags);
if (surface != 0) {
if (uint32_t(data.token) < 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()
{
Mutex::Autolock _l(gLock);
if (gOpenTransactions.size()) {
LOGE("openGlobalTransaction() called more than once. skipping.");
return;
}
const size_t N = gActiveConnections.size();
VERBOSE("openGlobalTransaction (%ld clients)", N);
for (size_t i=0; i<N; i++) {
sp<SurfaceComposerClient> client(gActiveConnections.valueAt(i));
if (gOpenTransactions.indexOf(client) < 0) {
if (client->openTransaction() == NO_ERROR) {
if (gOpenTransactions.add(client) < 0) {
// Ooops!
LOGE( "Unable to add a SurfaceComposerClient "
"to the global transaction set (out of memory?)");
client->closeTransaction();
// let it go, it'll fail later when the user
// tries to do something with the transaction
}
} 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 SurfaceComposerClient::closeGlobalTransaction()
{
gLock.lock();
SortedVector< sp<SurfaceComposerClient> > clients(gOpenTransactions);
gOpenTransactions.clear();
gLock.unlock();
const size_t N = clients.size();
VERBOSE("closeGlobalTransaction (%ld clients)", N);
if (N == 1) {
clients[0]->closeTransaction();
} else {
const sp<ISurfaceComposer>& sm(_get_surface_manager());
sm->openGlobalTransaction();
for (size_t i=0; i<N; i++) {
clients[i]->closeTransaction();
}
sm->closeGlobalTransaction();
}
}
status_t SurfaceComposerClient::freezeDisplay(DisplayID dpy, uint32_t flags)
{
const sp<ISurfaceComposer>& sm(_get_surface_manager());
return sm->freezeDisplay(dpy, flags);
}
status_t SurfaceComposerClient::unfreezeDisplay(DisplayID dpy, uint32_t flags)
{
const sp<ISurfaceComposer>& sm(_get_surface_manager());
return sm->unfreezeDisplay(dpy, flags);
}
int SurfaceComposerClient::setOrientation(DisplayID dpy,
int orientation, uint32_t flags)
{
const sp<ISurfaceComposer>& sm(_get_surface_manager());
return sm->setOrientation(dpy, orientation, flags);
}
status_t SurfaceComposerClient::openTransaction()
{
if (mStatus != NO_ERROR)
return mStatus;
Mutex::Autolock _l(mLock);
VERBOSE( "openTransaction (client %p, mTransactionOpen=%d)",
this, mTransactionOpen);
mTransactionOpen++;
if (mPrebuiltLayerState == 0) {
mPrebuiltLayerState = new layer_state_t;
}
return NO_ERROR;
}
status_t SurfaceComposerClient::closeTransaction()
{
if (mStatus != NO_ERROR)
return mStatus;
Mutex::Autolock _l(mLock);
VERBOSE( "closeTransaction (client %p, mTransactionOpen=%d)",
this, mTransactionOpen);
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;
}
}; // namespace android
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