BitmapHolder::BitmapHolder(SkReader32* reader, uint32_t op32,
SkGPipeState* state) {
const unsigned flags = state->getFlags();
const unsigned index = DrawOp_unpackData(op32);
if (shouldFlattenBitmaps(flags)) {
fHeapEntry = NULL;
fBitmap = state->getBitmap(index);
} else {
SkBitmapHeapEntry* entry = state->getSharedHeap()->getEntry(index);
if (SkToBool(flags & SkGPipeWriter::kSimultaneousReaders_Flag)) {
// Make a shallow copy for thread safety. Each thread will point to the same SkPixelRef,
// which is thread safe.
fBitmapStorage = *entry->getBitmap();
fBitmap = &fBitmapStorage;
// Release the ref on the bitmap now, since we made our own copy.
entry->releaseRef();
fHeapEntry = NULL;
} else {
SkASSERT(!shouldFlattenBitmaps(flags));
SkASSERT(!SkToBool(flags & SkGPipeWriter::kSimultaneousReaders_Flag));
fHeapEntry = entry;
fBitmap = fHeapEntry->getBitmap();
}
}
}
SkGPipeCanvas::SkGPipeCanvas(SkGPipeController* controller,
SkWriter32* writer, uint32_t flags,
uint32_t width, uint32_t height)
: SkCanvas(width, height)
, fFactorySet(is_cross_process(flags) ? SkNEW(SkNamedFactorySet) : NULL)
, fWriter(*writer)
, fFlags(flags)
, fFlattenableHeap(FLATTENABLES_TO_KEEP, fFactorySet, is_cross_process(flags))
, fFlatDictionary(&fFlattenableHeap)
{
fController = controller;
fDone = false;
fBlockSize = 0; // need first block from controller
fBytesNotified = 0;
sk_bzero(fCurrFlatIndex, sizeof(fCurrFlatIndex));
// Tell the reader the appropriate flags to use.
if (this->needOpBytes()) {
this->writeOp(kReportFlags_DrawOp, fFlags, 0);
}
if (shouldFlattenBitmaps(flags)) {
fBitmapShuttle.reset(SkNEW_ARGS(BitmapShuttle, (this)));
fBitmapHeap = SkNEW_ARGS(SkBitmapHeap, (fBitmapShuttle.get(), BITMAPS_TO_KEEP));
} else {
fBitmapHeap = SkNEW_ARGS(SkBitmapHeap,
(BITMAPS_TO_KEEP, controller->numberOfReaders()));
if (this->needOpBytes(sizeof(void*))) {
this->writeOp(kShareBitmapHeap_DrawOp);
fWriter.writePtr(static_cast<void*>(fBitmapHeap));
}
}
fFlattenableHeap.setBitmapStorage(fBitmapHeap);
this->doNotify();
}
/**
* Add a bitmap to the array of bitmaps, or replace an existing one.
* This is only used when in cross process mode without a shared heap.
*/
void addBitmap(int index) {
SkASSERT(shouldFlattenBitmaps(fFlags));
SkBitmap* bm;
if(fBitmaps.count() == index) {
bm = SkNEW(SkBitmap);
*fBitmaps.append() = bm;
} else {
bm = fBitmaps[index];
}
fReader->readBitmap(bm);
}
bool SkGPipeCanvas::shuttleBitmap(const SkBitmap& bm, int32_t slot) {
SkASSERT(shouldFlattenBitmaps(fFlags));
SkWriteBuffer buffer;
buffer.setNamedFactoryRecorder(fFactorySet);
buffer.writeBitmap(bm);
this->flattenFactoryNames();
size_t size = buffer.bytesWritten();
if (this->needOpBytes(size)) {
this->writeOp(kDef_Bitmap_DrawOp, 0, slot);
void* dst = static_cast<void*>(fWriter.reserve(size));
buffer.writeToMemory(dst);
return true;
}
return false;
}
/**
* Called when nothing else is to be written to the stream. Any repeated
* calls are ignored.
*
* @param notifyReaders Whether to send a message to the reader(s) that
* the writer is through sending commands. Should generally be true,
* unless there is an error which prevents further messages from
* being sent.
*/
void finish(bool notifyReaders) {
if (fDone) {
return;
}
if (notifyReaders && this->needOpBytes()) {
this->writeOp(kDone_DrawOp);
this->doNotify();
}
if (shouldFlattenBitmaps(fFlags)) {
// The following circular references exist:
// fFlattenableHeap -> fWriteBuffer -> fBitmapStorage -> fExternalStorage -> fCanvas
// fBitmapHeap -> fExternalStorage -> fCanvas
// fFlattenableHeap -> fBitmapStorage -> fExternalStorage -> fCanvas
// Break them all by destroying the final link to this SkGPipeCanvas.
fBitmapShuttle->removeCanvas();
}
fDone = true;
}
void updateReader() {
if (NULL == fReader) {
return;
}
bool crossProcess = SkToBool(fFlags & SkGPipeWriter::kCrossProcess_Flag);
fReader->setFlags(SkSetClearMask(fReader->getFlags(), crossProcess,
SkReadBuffer::kCrossProcess_Flag));
if (crossProcess) {
fReader->setFactoryArray(&fFactoryArray);
} else {
fReader->setFactoryArray(NULL);
}
if (shouldFlattenBitmaps(fFlags)) {
fReader->setBitmapStorage(this);
} else {
fReader->setBitmapStorage(fSharedHeap);
}
}
/**
* Access the shared heap. Only used in the case when bitmaps are not
* flattened.
*/
SkBitmapHeap* getSharedHeap() const {
SkASSERT(!shouldFlattenBitmaps(fFlags));
return fSharedHeap;
}
void setSharedHeap(SkBitmapHeap* heap) {
SkASSERT(!shouldFlattenBitmaps(fFlags) || NULL == heap);
SkRefCnt_SafeAssign(fSharedHeap, heap);
this->updateReader();
}
/**
* Override of SkBitmapHeapReader, so that SkReadBuffer can use
* these SkBitmaps for bitmap shaders. Used only in cross process mode
* without a shared heap.
*/
SkBitmap* getBitmap(int32_t index) const override {
SkASSERT(shouldFlattenBitmaps(fFlags));
return fBitmaps[index];
}
