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replicant-frameworks_native/libs/surfaceflinger_client/Surface.cpp
Dianne Hackborn 4b5e91e482 Introduce official public NativeWindow type. 
Not yet hooked up to anything in the NDK, but requires renaming
the existing android_native_window_t type everywhere.

Change-Id: Iffee6ea39c93b8b34e20fb69e4d2c7c837e5ea2e
2010-06-30 15:32:04 -07:00

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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 "Surface"
#include <stdint.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <utils/Errors.h>
#include <utils/threads.h>
#include <utils/CallStack.h>
#include <utils/Log.h>
#include <binder/IPCThreadState.h>
#include <binder/IMemory.h>
#include <ui/DisplayInfo.h>
#include <ui/GraphicBuffer.h>
#include <ui/GraphicBufferMapper.h>
#include <ui/Rect.h>
#include <surfaceflinger/Surface.h>
#include <surfaceflinger/ISurface.h>
#include <surfaceflinger/ISurfaceComposer.h>
#include <surfaceflinger/SurfaceComposerClient.h>
#include <private/surfaceflinger/SharedBufferStack.h>
#include <private/surfaceflinger/LayerState.h>
namespace android {
// ----------------------------------------------------------------------
static status_t copyBlt(
const sp<GraphicBuffer>& dst,
const sp<GraphicBuffer>& src,
const Region& reg)
{
// src and dst with, height and format must be identical. no verification
// is done here.
status_t err;
uint8_t const * src_bits = NULL;
err = src->lock(GRALLOC_USAGE_SW_READ_OFTEN, reg.bounds(), (void**)&src_bits);
LOGE_IF(err, "error locking src buffer %s", strerror(-err));
uint8_t* dst_bits = NULL;
err = dst->lock(GRALLOC_USAGE_SW_WRITE_OFTEN, reg.bounds(), (void**)&dst_bits);
LOGE_IF(err, "error locking dst buffer %s", strerror(-err));
Region::const_iterator head(reg.begin());
Region::const_iterator tail(reg.end());
if (head != tail && src_bits && dst_bits) {
const size_t bpp = bytesPerPixel(src->format);
const size_t dbpr = dst->stride * bpp;
const size_t sbpr = src->stride * bpp;
while (head != tail) {
const Rect& r(*head++);
ssize_t h = r.height();
if (h <= 0) continue;
size_t size = r.width() * bpp;
uint8_t const * s = src_bits + (r.left + src->stride * r.top) * bpp;
uint8_t * d = dst_bits + (r.left + dst->stride * r.top) * bpp;
if (dbpr==sbpr && size==sbpr) {
size *= h;
h = 1;
}
do {
memcpy(d, s, size);
d += dbpr;
s += sbpr;
} while (--h > 0);
}
}
if (src_bits)
src->unlock();
if (dst_bits)
dst->unlock();
return err;
}
// ============================================================================
// SurfaceControl
// ============================================================================
SurfaceControl::SurfaceControl(
const sp<SurfaceComposerClient>& client,
const sp<ISurface>& surface,
const ISurfaceComposerClient::surface_data_t& data,
uint32_t w, uint32_t h, PixelFormat format, uint32_t flags)
: mClient(client), mSurface(surface),
mToken(data.token), mIdentity(data.identity),
mWidth(data.width), mHeight(data.height), mFormat(data.format),
mFlags(flags)
{
}
SurfaceControl::~SurfaceControl()
{
destroy();
}
void SurfaceControl::destroy()
{
if (isValid()) {
mClient->destroySurface(mToken);
}
// clear all references and trigger an IPC now, to make sure things
// happen without delay, since these resources are quite heavy.
mClient.clear();
mSurface.clear();
IPCThreadState::self()->flushCommands();
}
void SurfaceControl::clear()
{
// here, the window manager tells us explicitly that we should destroy
// the surface's resource. Soon after this call, it will also release
// its last reference (which will call the dtor); however, it is possible
// that a client living in the same process still holds references which
// would delay the call to the dtor -- that is why we need this explicit
// "clear()" call.
destroy();
}
bool SurfaceControl::isSameSurface(
const sp<SurfaceControl>& lhs, const sp<SurfaceControl>& rhs)
{
if (lhs == 0 || rhs == 0)
return false;
return lhs->mSurface->asBinder() == rhs->mSurface->asBinder();
}
status_t SurfaceControl::setLayer(int32_t layer) {
status_t err = validate();
if (err < 0) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->setLayer(mToken, layer);
}
status_t SurfaceControl::setPosition(int32_t x, int32_t y) {
status_t err = validate();
if (err < 0) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->setPosition(mToken, x, y);
}
status_t SurfaceControl::setSize(uint32_t w, uint32_t h) {
status_t err = validate();
if (err < 0) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->setSize(mToken, w, h);
}
status_t SurfaceControl::hide() {
status_t err = validate();
if (err < 0) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->hide(mToken);
}
status_t SurfaceControl::show(int32_t layer) {
status_t err = validate();
if (err < 0) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->show(mToken, layer);
}
status_t SurfaceControl::freeze() {
status_t err = validate();
if (err < 0) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->freeze(mToken);
}
status_t SurfaceControl::unfreeze() {
status_t err = validate();
if (err < 0) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->unfreeze(mToken);
}
status_t SurfaceControl::setFlags(uint32_t flags, uint32_t mask) {
status_t err = validate();
if (err < 0) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->setFlags(mToken, flags, mask);
}
status_t SurfaceControl::setTransparentRegionHint(const Region& transparent) {
status_t err = validate();
if (err < 0) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->setTransparentRegionHint(mToken, transparent);
}
status_t SurfaceControl::setAlpha(float alpha) {
status_t err = validate();
if (err < 0) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->setAlpha(mToken, alpha);
}
status_t SurfaceControl::setMatrix(float dsdx, float dtdx, float dsdy, float dtdy) {
status_t err = validate();
if (err < 0) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->setMatrix(mToken, dsdx, dtdx, dsdy, dtdy);
}
status_t SurfaceControl::setFreezeTint(uint32_t tint) {
status_t err = validate();
if (err < 0) return err;
const sp<SurfaceComposerClient>& client(mClient);
return client->setFreezeTint(mToken, tint);
}
status_t SurfaceControl::validate() const
{
if (mToken<0 || mClient==0) {
LOGE("invalid token (%d, identity=%u) or client (%p)",
mToken, mIdentity, mClient.get());
return NO_INIT;
}
return NO_ERROR;
}
status_t SurfaceControl::writeSurfaceToParcel(
const sp<SurfaceControl>& control, Parcel* parcel)
{
sp<ISurface> sur;
uint32_t identity = 0;
uint32_t width = 0;
uint32_t height = 0;
uint32_t format = 0;
uint32_t flags = 0;
if (SurfaceControl::isValid(control)) {
sur = control->mSurface;
identity = control->mIdentity;
width = control->mWidth;
height = control->mHeight;
format = control->mFormat;
flags = control->mFlags;
}
parcel->writeStrongBinder(sur!=0 ? sur->asBinder() : NULL);
parcel->writeInt32(identity);
parcel->writeInt32(width);
parcel->writeInt32(height);
parcel->writeInt32(format);
parcel->writeInt32(flags);
return NO_ERROR;
}
sp<Surface> SurfaceControl::getSurface() const
{
Mutex::Autolock _l(mLock);
if (mSurfaceData == 0) {
mSurfaceData = new Surface(const_cast<SurfaceControl*>(this));
}
return mSurfaceData;
}
// ============================================================================
// Surface
// ============================================================================
class SurfaceClient : public Singleton<SurfaceClient>
{
// all these attributes are constants
sp<ISurfaceComposer> mComposerService;
sp<ISurfaceComposerClient> mClient;
status_t mStatus;
SharedClient* mControl;
sp<IMemoryHeap> mControlMemory;
SurfaceClient()
: Singleton<SurfaceClient>(), mStatus(NO_INIT)
{
sp<ISurfaceComposer> sf(ComposerService::getComposerService());
mComposerService = sf;
mClient = sf->createClientConnection();
if (mClient != NULL) {
mControlMemory = mClient->getControlBlock();
if (mControlMemory != NULL) {
mControl = static_cast<SharedClient *>(
mControlMemory->getBase());
if (mControl) {
mStatus = NO_ERROR;
}
}
}
}
friend class Singleton<SurfaceClient>;
public:
status_t initCheck() const {
return mStatus;
}
SharedClient* getSharedClient() const {
return mControl;
}
ssize_t getTokenForSurface(const sp<ISurface>& sur) const {
// TODO: we could cache a few tokens here to avoid an IPC
return mClient->getTokenForSurface(sur);
}
void signalServer() const {
mComposerService->signal();
}
};
ANDROID_SINGLETON_STATIC_INSTANCE(SurfaceClient);
// ---------------------------------------------------------------------------
Surface::Surface(const sp<SurfaceControl>& surface)
: mBufferMapper(GraphicBufferMapper::get()),
mClient(SurfaceClient::getInstance()),
mSharedBufferClient(NULL),
mInitCheck(NO_INIT),
mSurface(surface->mSurface),
mIdentity(surface->mIdentity),
mFormat(surface->mFormat), mFlags(surface->mFlags),
mWidth(surface->mWidth), mHeight(surface->mHeight)
{
init();
}
Surface::Surface(const Parcel& parcel, const sp<IBinder>& ref)
: mBufferMapper(GraphicBufferMapper::get()),
mClient(SurfaceClient::getInstance()),
mSharedBufferClient(NULL),
mInitCheck(NO_INIT)
{
mSurface = interface_cast<ISurface>(ref);
mIdentity = parcel.readInt32();
mWidth = parcel.readInt32();
mHeight = parcel.readInt32();
mFormat = parcel.readInt32();
mFlags = parcel.readInt32();
init();
}
status_t Surface::writeToParcel(
const sp<Surface>& surface, Parcel* parcel)
{
sp<ISurface> sur;
uint32_t identity = 0;
uint32_t width = 0;
uint32_t height = 0;
uint32_t format = 0;
uint32_t flags = 0;
if (Surface::isValid(surface)) {
sur = surface->mSurface;
identity = surface->mIdentity;
width = surface->mWidth;
height = surface->mHeight;
format = surface->mFormat;
flags = surface->mFlags;
}
parcel->writeStrongBinder(sur!=0 ? sur->asBinder() : NULL);
parcel->writeInt32(identity);
parcel->writeInt32(width);
parcel->writeInt32(height);
parcel->writeInt32(format);
parcel->writeInt32(flags);
return NO_ERROR;
}
sp<Surface> Surface::readFromParcel(
const Parcel& data, const sp<Surface>& other)
{
sp<Surface> result(other);
sp<IBinder> binder(data.readStrongBinder());
if (other==0 || binder != other->mSurface->asBinder()) {
result = new Surface(data, binder);
}
return result;
}
void Surface::init()
{
ANativeWindow::setSwapInterval = setSwapInterval;
ANativeWindow::dequeueBuffer = dequeueBuffer;
ANativeWindow::lockBuffer = lockBuffer;
ANativeWindow::queueBuffer = queueBuffer;
ANativeWindow::query = query;
ANativeWindow::perform = perform;
DisplayInfo dinfo;
SurfaceComposerClient::getDisplayInfo(0, &dinfo);
const_cast<float&>(ANativeWindow::xdpi) = dinfo.xdpi;
const_cast<float&>(ANativeWindow::ydpi) = dinfo.ydpi;
// FIXME: set real values here
const_cast<int&>(ANativeWindow::minSwapInterval) = 1;
const_cast<int&>(ANativeWindow::maxSwapInterval) = 1;
const_cast<uint32_t&>(ANativeWindow::flags) = 0;
mConnected = 0;
mSwapRectangle.makeInvalid();
// two buffers by default
mBuffers.setCapacity(2);
mBuffers.insertAt(0, 2);
if (mSurface != 0 && mClient.initCheck() == NO_ERROR) {
int32_t token = mClient.getTokenForSurface(mSurface);
if (token >= 0) {
mSharedBufferClient = new SharedBufferClient(
mClient.getSharedClient(), token, 2, mIdentity);
mInitCheck = mClient.getSharedClient()->validate(token);
}
}
}
Surface::~Surface()
{
// this is a client-side operation, the surface is destroyed, unmap
// its buffers in this process.
size_t size = mBuffers.size();
for (size_t i=0 ; i<size ; i++) {
if (mBuffers[i] != 0 && mBuffers[i]->handle != 0) {
getBufferMapper().unregisterBuffer(mBuffers[i]->handle);
}
}
// clear all references and trigger an IPC now, to make sure things
// happen without delay, since these resources are quite heavy.
mBuffers.clear();
mSurface.clear();
delete mSharedBufferClient;
IPCThreadState::self()->flushCommands();
}
bool Surface::isValid() {
return mInitCheck == NO_ERROR;
}
status_t Surface::validate() const
{
// check that we initialized ourself properly
if (mInitCheck != NO_ERROR) {
LOGE("invalid token (identity=%u)", mIdentity);
return mInitCheck;
}
// verify the identity of this surface
uint32_t identity = mSharedBufferClient->getIdentity();
// this is a bit of a (temporary) special case, identity==0 means that
// no operation are allowed from the client (eg: dequeue/queue), this
// is used with PUSH_BUFFER surfaces for instance
if (identity == 0) {
LOGE("[Surface] invalid operation (identity=%u)", mIdentity);
return INVALID_OPERATION;
}
if (mIdentity != identity) {
LOGE("[Surface] using an invalid surface, "
"identity=%u should be %d",
mIdentity, identity);
return NO_INIT;
}
// check the surface didn't become invalid
status_t err = mSharedBufferClient->getStatus();
if (err != NO_ERROR) {
LOGE("surface (identity=%u) is invalid, err=%d (%s)",
mIdentity, err, strerror(-err));
return err;
}
return NO_ERROR;
}
sp<ISurface> Surface::getISurface() const {
return mSurface;
}
// ----------------------------------------------------------------------------
int Surface::setSwapInterval(ANativeWindow* window, int interval) {
return 0;
}
int Surface::dequeueBuffer(ANativeWindow* window,
android_native_buffer_t** buffer) {
Surface* self = getSelf(window);
return self->dequeueBuffer(buffer);
}
int Surface::lockBuffer(ANativeWindow* window,
android_native_buffer_t* buffer) {
Surface* self = getSelf(window);
return self->lockBuffer(buffer);
}
int Surface::queueBuffer(ANativeWindow* window,
android_native_buffer_t* buffer) {
Surface* self = getSelf(window);
return self->queueBuffer(buffer);
}
int Surface::query(ANativeWindow* window,
int what, int* value) {
Surface* self = getSelf(window);
return self->query(what, value);
}
int Surface::perform(ANativeWindow* window,
int operation, ...) {
va_list args;
va_start(args, operation);
Surface* self = getSelf(window);
int res = self->perform(operation, args);
va_end(args);
return res;
}
// ----------------------------------------------------------------------------
bool Surface::needNewBuffer(int bufIdx,
uint32_t *pWidth, uint32_t *pHeight,
uint32_t *pFormat, uint32_t *pUsage) const
{
Mutex::Autolock _l(mSurfaceLock);
// Always call needNewBuffer(), since it clears the needed buffers flags
bool needNewBuffer = mSharedBufferClient->needNewBuffer(bufIdx);
bool validBuffer = mBufferInfo.validateBuffer(mBuffers[bufIdx]);
bool newNeewBuffer = needNewBuffer || !validBuffer;
if (newNeewBuffer) {
mBufferInfo.get(pWidth, pHeight, pFormat, pUsage);
}
return newNeewBuffer;
}
int Surface::dequeueBuffer(android_native_buffer_t** buffer)
{
status_t err = validate();
if (err != NO_ERROR)
return err;
ssize_t bufIdx = mSharedBufferClient->dequeue();
if (bufIdx < 0) {
LOGE("error dequeuing a buffer (%s)", strerror(bufIdx));
return bufIdx;
}
// grow the buffer array if needed
const size_t size = mBuffers.size();
const size_t needed = bufIdx+1;
if (size < needed) {
mBuffers.insertAt(size, needed-size);
}
uint32_t w, h, format, usage;
if (needNewBuffer(bufIdx, &w, &h, &format, &usage)) {
err = getBufferLocked(bufIdx, w, h, format, usage);
LOGE_IF(err, "getBufferLocked(%ld, %u, %u, %u, %08x) failed (%s)",
bufIdx, w, h, format, usage, strerror(-err));
if (err == NO_ERROR) {
// reset the width/height with the what we get from the buffer
const sp<GraphicBuffer>& backBuffer(mBuffers[bufIdx]);
mWidth = uint32_t(backBuffer->width);
mHeight = uint32_t(backBuffer->height);
}
}
// if we still don't have a buffer here, we probably ran out of memory
const sp<GraphicBuffer>& backBuffer(mBuffers[bufIdx]);
if (!err && backBuffer==0) {
err = NO_MEMORY;
}
if (err == NO_ERROR) {
mDirtyRegion.set(backBuffer->width, backBuffer->height);
*buffer = backBuffer.get();
} else {
mSharedBufferClient->undoDequeue(bufIdx);
}
return err;
}
int Surface::lockBuffer(android_native_buffer_t* buffer)
{
status_t err = validate();
if (err != NO_ERROR)
return err;
int32_t bufIdx = getBufferIndex(GraphicBuffer::getSelf(buffer));
err = mSharedBufferClient->lock(bufIdx);
LOGE_IF(err, "error locking buffer %d (%s)", bufIdx, strerror(-err));
return err;
}
int Surface::queueBuffer(android_native_buffer_t* buffer)
{
status_t err = validate();
if (err != NO_ERROR)
return err;
if (mSwapRectangle.isValid()) {
mDirtyRegion.set(mSwapRectangle);
}
int32_t bufIdx = getBufferIndex(GraphicBuffer::getSelf(buffer));
mSharedBufferClient->setCrop(bufIdx, mNextBufferCrop);
mSharedBufferClient->setDirtyRegion(bufIdx, mDirtyRegion);
err = mSharedBufferClient->queue(bufIdx);
LOGE_IF(err, "error queuing buffer %d (%s)", bufIdx, strerror(-err));
if (err == NO_ERROR) {
// TODO: can we avoid this IPC if we know there is one pending?
mClient.signalServer();
}
return err;
}
int Surface::query(int what, int* value)
{
switch (what) {
case NATIVE_WINDOW_WIDTH:
*value = int(mWidth);
return NO_ERROR;
case NATIVE_WINDOW_HEIGHT:
*value = int(mHeight);
return NO_ERROR;
case NATIVE_WINDOW_FORMAT:
*value = int(mFormat);
return NO_ERROR;
}
return BAD_VALUE;
}
int Surface::perform(int operation, va_list args)
{
status_t err = validate();
if (err != NO_ERROR)
return err;
int res = NO_ERROR;
switch (operation) {
case NATIVE_WINDOW_SET_USAGE:
dispatch_setUsage( args );
break;
case NATIVE_WINDOW_CONNECT:
res = dispatch_connect( args );
break;
case NATIVE_WINDOW_DISCONNECT:
res = dispatch_disconnect( args );
break;
case NATIVE_WINDOW_SET_CROP:
res = dispatch_crop( args );
break;
case NATIVE_WINDOW_SET_BUFFER_COUNT:
res = dispatch_set_buffer_count( args );
break;
case NATIVE_WINDOW_SET_BUFFERS_GEOMETRY:
res = dispatch_set_buffers_geometry( args );
break;
default:
res = NAME_NOT_FOUND;
break;
}
return res;
}
void Surface::dispatch_setUsage(va_list args) {
int usage = va_arg(args, int);
setUsage( usage );
}
int Surface::dispatch_connect(va_list args) {
int api = va_arg(args, int);
return connect( api );
}
int Surface::dispatch_disconnect(va_list args) {
int api = va_arg(args, int);
return disconnect( api );
}
int Surface::dispatch_crop(va_list args) {
android_native_rect_t const* rect = va_arg(args, android_native_rect_t*);
return crop( reinterpret_cast<Rect const*>(rect) );
}
int Surface::dispatch_set_buffer_count(va_list args) {
size_t bufferCount = va_arg(args, size_t);
return setBufferCount(bufferCount);
}
int Surface::dispatch_set_buffers_geometry(va_list args) {
int w = va_arg(args, int);
int h = va_arg(args, int);
int f = va_arg(args, int);
return setBuffersGeometry(w, h, f);
}
void Surface::setUsage(uint32_t reqUsage)
{
Mutex::Autolock _l(mSurfaceLock);
mBufferInfo.set(reqUsage);
}
int Surface::connect(int api)
{
Mutex::Autolock _l(mSurfaceLock);
int err = NO_ERROR;
switch (api) {
case NATIVE_WINDOW_API_EGL:
if (mConnected) {
err = -EINVAL;
} else {
mConnected = api;
}
break;
default:
err = -EINVAL;
break;
}
return err;
}
int Surface::disconnect(int api)
{
Mutex::Autolock _l(mSurfaceLock);
int err = NO_ERROR;
switch (api) {
case NATIVE_WINDOW_API_EGL:
if (mConnected == api) {
mConnected = 0;
} else {
err = -EINVAL;
}
break;
default:
err = -EINVAL;
break;
}
return err;
}
int Surface::crop(Rect const* rect)
{
Mutex::Autolock _l(mSurfaceLock);
// TODO: validate rect size
mNextBufferCrop = *rect;
return NO_ERROR;
}
int Surface::setBufferCount(int bufferCount)
{
sp<ISurface> s(mSurface);
if (s == 0) return NO_INIT;
class SetBufferCountIPC : public SharedBufferClient::SetBufferCountCallback {
sp<ISurface> surface;
virtual status_t operator()(int bufferCount) const {
return surface->setBufferCount(bufferCount);
}
public:
SetBufferCountIPC(const sp<ISurface>& surface) : surface(surface) { }
} ipc(s);
status_t err = mSharedBufferClient->setBufferCount(bufferCount, ipc);
LOGE_IF(err, "ISurface::setBufferCount(%d) returned %s",
bufferCount, strerror(-err));
return err;
}
int Surface::setBuffersGeometry(int w, int h, int format)
{
if (w<0 || h<0 || format<0)
return BAD_VALUE;
if ((w && !h) || (!w && h))
return BAD_VALUE;
Mutex::Autolock _l(mSurfaceLock);
mBufferInfo.set(w, h, format);
return NO_ERROR;
}
// ----------------------------------------------------------------------------
int Surface::getConnectedApi() const
{
Mutex::Autolock _l(mSurfaceLock);
return mConnected;
}
// ----------------------------------------------------------------------------
status_t Surface::lock(SurfaceInfo* info, bool blocking) {
return Surface::lock(info, NULL, blocking);
}
status_t Surface::lock(SurfaceInfo* other, Region* dirtyIn, bool blocking)
{
if (getConnectedApi()) {
LOGE("Surface::lock(%p) failed. Already connected to another API",
(ANativeWindow*)this);
CallStack stack;
stack.update();
stack.dump("");
return INVALID_OPERATION;
}
if (mApiLock.tryLock() != NO_ERROR) {
LOGE("calling Surface::lock from different threads!");
CallStack stack;
stack.update();
stack.dump("");
return WOULD_BLOCK;
}
/* Here we're holding mApiLock */
if (mLockedBuffer != 0) {
LOGE("Surface::lock failed, already locked");
mApiLock.unlock();
return INVALID_OPERATION;
}
// we're intending to do software rendering from this point
setUsage(GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN);
android_native_buffer_t* out;
status_t err = dequeueBuffer(&out);
LOGE_IF(err, "dequeueBuffer failed (%s)", strerror(-err));
if (err == NO_ERROR) {
sp<GraphicBuffer> backBuffer(GraphicBuffer::getSelf(out));
err = lockBuffer(backBuffer.get());
LOGE_IF(err, "lockBuffer (idx=%d) failed (%s)",
getBufferIndex(backBuffer), strerror(-err));
if (err == NO_ERROR) {
const Rect bounds(backBuffer->width, backBuffer->height);
const Region boundsRegion(bounds);
Region scratch(boundsRegion);
Region& newDirtyRegion(dirtyIn ? *dirtyIn : scratch);
newDirtyRegion &= boundsRegion;
// figure out if we can copy the frontbuffer back
const sp<GraphicBuffer>& frontBuffer(mPostedBuffer);
const bool canCopyBack = (frontBuffer != 0 &&
backBuffer->width == frontBuffer->width &&
backBuffer->height == frontBuffer->height &&
backBuffer->format == frontBuffer->format &&
!(mFlags & ISurfaceComposer::eDestroyBackbuffer));
// the dirty region we report to surfaceflinger is the one
// given by the user (as opposed to the one *we* return to the
// user).
mDirtyRegion = newDirtyRegion;
if (canCopyBack) {
// copy the area that is invalid and not repainted this round
const Region copyback(mOldDirtyRegion.subtract(newDirtyRegion));
if (!copyback.isEmpty())
copyBlt(backBuffer, frontBuffer, copyback);
} else {
// if we can't copy-back anything, modify the user's dirty
// region to make sure they redraw the whole buffer
newDirtyRegion = boundsRegion;
}
// keep track of the are of the buffer that is "clean"
// (ie: that will be redrawn)
mOldDirtyRegion = newDirtyRegion;
void* vaddr;
status_t res = backBuffer->lock(
GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
newDirtyRegion.bounds(), &vaddr);
LOGW_IF(res, "failed locking buffer (handle = %p)",
backBuffer->handle);
mLockedBuffer = backBuffer;
other->w = backBuffer->width;
other->h = backBuffer->height;
other->s = backBuffer->stride;
other->usage = backBuffer->usage;
other->format = backBuffer->format;
other->bits = vaddr;
}
}
mApiLock.unlock();
return err;
}
status_t Surface::unlockAndPost()
{
if (mLockedBuffer == 0) {
LOGE("Surface::unlockAndPost failed, no locked buffer");
return INVALID_OPERATION;
}
status_t err = mLockedBuffer->unlock();
LOGE_IF(err, "failed unlocking buffer (%p)", mLockedBuffer->handle);
err = queueBuffer(mLockedBuffer.get());
LOGE_IF(err, "queueBuffer (idx=%d) failed (%s)",
getBufferIndex(mLockedBuffer), strerror(-err));
mPostedBuffer = mLockedBuffer;
mLockedBuffer = 0;
return err;
}
void Surface::setSwapRectangle(const Rect& r) {
Mutex::Autolock _l(mSurfaceLock);
mSwapRectangle = r;
}
int Surface::getBufferIndex(const sp<GraphicBuffer>& buffer) const
{
return buffer->getIndex();
}
status_t Surface::getBufferLocked(int index,
uint32_t w, uint32_t h, uint32_t format, uint32_t usage)
{
sp<ISurface> s(mSurface);
if (s == 0) return NO_INIT;
status_t err = NO_MEMORY;
// free the current buffer
sp<GraphicBuffer>& currentBuffer(mBuffers.editItemAt(index));
if (currentBuffer != 0) {
getBufferMapper().unregisterBuffer(currentBuffer->handle);
currentBuffer.clear();
}
sp<GraphicBuffer> buffer = s->requestBuffer(index, w, h, format, usage);
LOGE_IF(buffer==0,
"ISurface::getBuffer(%d, %08x) returned NULL",
index, usage);
if (buffer != 0) { // this should never happen by construction
LOGE_IF(buffer->handle == NULL,
"Surface (identity=%d) requestBuffer(%d, %u, %u, %u, %08x) "
"returned a buffer with a null handle",
mIdentity, index, w, h, format, usage);
err = mSharedBufferClient->getStatus();
LOGE_IF(err, "Surface (identity=%d) state = %d", mIdentity, err);
if (!err && buffer->handle != NULL) {
err = getBufferMapper().registerBuffer(buffer->handle);
LOGW_IF(err, "registerBuffer(...) failed %d (%s)",
err, strerror(-err));
if (err == NO_ERROR) {
currentBuffer = buffer;
currentBuffer->setIndex(index);
}
} else {
err = err<0 ? err : status_t(NO_MEMORY);
}
}
return err;
}
// ----------------------------------------------------------------------------
Surface::BufferInfo::BufferInfo()
: mWidth(0), mHeight(0), mFormat(0),
mUsage(GRALLOC_USAGE_HW_RENDER), mDirty(0)
{
}
void Surface::BufferInfo::set(uint32_t w, uint32_t h, uint32_t format) {
if ((mWidth != w) || (mHeight != h) || (mFormat != format)) {
mWidth = w;
mHeight = h;
mFormat = format;
mDirty |= GEOMETRY;
}
}
void Surface::BufferInfo::set(uint32_t usage) {
mUsage = usage;
}
void Surface::BufferInfo::get(uint32_t *pWidth, uint32_t *pHeight,
uint32_t *pFormat, uint32_t *pUsage) const {
*pWidth = mWidth;
*pHeight = mHeight;
*pFormat = mFormat;
*pUsage = mUsage;
}
bool Surface::BufferInfo::validateBuffer(const sp<GraphicBuffer>& buffer) const {
// make sure we AT LEAST have the usage flags we want
if (mDirty || buffer==0 ||
((buffer->usage & mUsage) != mUsage)) {
mDirty = 0;
return false;
}
return true;
}
// ----------------------------------------------------------------------------
}; // namespace android
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