void SkBinaryWriteBuffer::writeBitmap(const SkBitmap& bitmap) {
// Record the width and height. This way if readBitmap fails a dummy bitmap can be drawn at the
// right size.
this->writeInt(bitmap.width());
this->writeInt(bitmap.height());
// Record information about the bitmap in one of two ways, in order of priority:
// 1. If there is a function for encoding bitmaps, use it to write an encoded version of the
// bitmap. After writing a boolean value of false, signifying that a heap was not used, write
// the size of the encoded data. A non-zero size signifies that encoded data was written.
// 2. Call SkBitmap::flatten. After writing a boolean value of false, signifying that a heap was
// not used, write a zero to signify that the data was not encoded.
// Write a bool to indicate that we did not use an SkBitmapHeap. That feature is deprecated.
this->writeBool(false);
SkPixelRef* pixelRef = bitmap.pixelRef();
if (pixelRef) {
// see if the pixelref already has an encoded version
SkAutoDataUnref existingData(pixelRef->refEncodedData());
if (existingData.get() != nullptr) {
// Assumes that if the client did not set a serializer, they are
// happy to get the encoded data.
if (!fPixelSerializer || fPixelSerializer->useEncodedData(existingData->data(),
existingData->size())) {
write_encoded_bitmap(this, existingData, bitmap.pixelRefOrigin());
return;
}
}
// see if the caller wants to manually encode
SkAutoPixmapUnlock result;
if (fPixelSerializer && bitmap.requestLock(&result)) {
SkAutoDataUnref data(fPixelSerializer->encode(result.pixmap()));
if (data.get() != nullptr) {
// if we have to "encode" the bitmap, then we assume there is no
// offset to share, since we are effectively creating a new pixelref
write_encoded_bitmap(this, data, SkIPoint::Make(0, 0));
return;
}
}
}
this->writeUInt(0); // signal raw pixels
SkBitmap::WriteRawPixels(this, bitmap);
}
void SkWriteBuffer::writeBitmap(const SkBitmap& bitmap) {
// Record the width and height. This way if readBitmap fails a dummy bitmap can be drawn at the
// right size.
this->writeInt(bitmap.width());
this->writeInt(bitmap.height());
// Record information about the bitmap in one of three ways, in order of priority:
// 1. If there is an SkBitmapHeap, store it in the heap. The client can avoid serializing the
// bitmap entirely or serialize it later as desired. A boolean value of true will be written
// to the stream to signify that a heap was used.
// 2. If there is a function for encoding bitmaps, use it to write an encoded version of the
// bitmap. After writing a boolean value of false, signifying that a heap was not used, write
// the size of the encoded data. A non-zero size signifies that encoded data was written.
// 3. Call SkBitmap::flatten. After writing a boolean value of false, signifying that a heap was
// not used, write a zero to signify that the data was not encoded.
bool useBitmapHeap = fBitmapHeap != NULL;
// Write a bool: true if the SkBitmapHeap is to be used, in which case the reader must use an
// SkBitmapHeapReader to read the SkBitmap. False if the bitmap was serialized another way.
this->writeBool(useBitmapHeap);
if (useBitmapHeap) {
SkASSERT(NULL == fPixelSerializer);
int32_t slot = fBitmapHeap->insert(bitmap);
fWriter.write32(slot);
// crbug.com/155875
// The generation ID is not required information. We write it to prevent collisions
// in SkFlatDictionary. It is possible to get a collision when a previously
// unflattened (i.e. stale) instance of a similar flattenable is in the dictionary
// and the instance currently being written is re-using the same slot from the
// bitmap heap.
fWriter.write32(bitmap.getGenerationID());
return;
}
SkPixelRef* pixelRef = bitmap.pixelRef();
if (pixelRef) {
// see if the pixelref already has an encoded version
SkAutoDataUnref existingData(pixelRef->refEncodedData());
if (existingData.get() != NULL) {
// Assumes that if the client did not set a serializer, they are
// happy to get the encoded data.
if (!fPixelSerializer || fPixelSerializer->useEncodedData(existingData->data(),
existingData->size())) {
write_encoded_bitmap(this, existingData, bitmap.pixelRefOrigin());
return;
}
}
// see if the caller wants to manually encode
SkAutoPixmapUnlock result;
if (fPixelSerializer && bitmap.requestLock(&result)) {
const SkPixmap& pmap = result.pixmap();
SkASSERT(NULL == fBitmapHeap);
SkAutoDataUnref data(fPixelSerializer->encodePixels(pmap.info(),
pmap.addr(),
pmap.rowBytes()));
if (data.get() != NULL) {
// if we have to "encode" the bitmap, then we assume there is no
// offset to share, since we are effectively creating a new pixelref
write_encoded_bitmap(this, data, SkIPoint::Make(0, 0));
return;
}
}
}
this->writeUInt(0); // signal raw pixels
SkBitmap::WriteRawPixels(this, bitmap);
}