bool readDng() {
try {
// Due to the limit of DNG SDK, we need to reset host and info.
fHost.reset(new SkDngHost(&fAllocator));
fInfo.reset(new dng_info);
fDngStream.reset(new SkDngStream(fStream));
fHost->ValidateSizes();
fInfo->Parse(*fHost, *fDngStream);
fInfo->PostParse(*fHost);
if (!fInfo->IsValidDNG()) {
return false;
}
fNegative.reset(fHost->Make_dng_negative());
fNegative->Parse(*fHost, *fDngStream, *fInfo);
fNegative->PostParse(*fHost, *fDngStream, *fInfo);
fNegative->SynchronizeMetadata();
dng_point cfaPatternSize(0, 0);
if (fNegative->GetMosaicInfo() != nullptr) {
cfaPatternSize = fNegative->GetMosaicInfo()->fCFAPatternSize;
}
this->init(static_cast<int>(fNegative->DefaultCropSizeH().As_real64()),
static_cast<int>(fNegative->DefaultCropSizeV().As_real64()),
cfaPatternSize);
return true;
} catch (...) {
return false;
}
}
bool initFromPiex() {
// Does not take the ownership of rawStream.
SkPiexStream piexStream(fStream.get());
::piex::PreviewImageData imageData;
if (::piex::IsRaw(&piexStream)
&& ::piex::GetPreviewImageData(&piexStream, &imageData) == ::piex::Error::kOk)
{
dng_point cfaPatternSize(imageData.cfa_pattern_dim[1], imageData.cfa_pattern_dim[0]);
return this->init(static_cast<int>(imageData.full_width),
static_cast<int>(imageData.full_height), cfaPatternSize);
}
return false;
}
bool initFromPiex() {
// Does not take the ownership of rawStream.
SkPiexStream piexStream(fStream.get());
::piex::PreviewImageData imageData;
if (::piex::IsRaw(&piexStream)
&& ::piex::GetPreviewImageData(&piexStream, &imageData) == ::piex::Error::kOk)
{
// Verify the size information, as it is only optional information for PIEX.
if (imageData.full_width == 0 || imageData.full_height == 0) {
return false;
}
dng_point cfaPatternSize(imageData.cfa_pattern_dim[1], imageData.cfa_pattern_dim[0]);
this->init(static_cast<int>(imageData.full_width),
static_cast<int>(imageData.full_height), cfaPatternSize);
return true;
}
return false;
}
