void PsdImage::processResourceBlock(uint16_t resourceId, uint32_t resourceSize)
{
switch(resourceId)
{
case kPhotoshopResourceID_IPTC_NAA:
{
DataBuf rawIPTC(resourceSize);
io_->read(rawIPTC.pData_, rawIPTC.size_);
if (io_->error() || io_->eof()) throw Error(14);
if (IptcParser::decode(iptcData_, rawIPTC.pData_, rawIPTC.size_)) {
#ifndef SUPPRESS_WARNINGS
std::cerr << "Warning: Failed to decode IPTC metadata.\n";
#endif
iptcData_.clear();
}
break;
}
case kPhotoshopResourceID_ExifInfo:
{
DataBuf rawExif(resourceSize);
io_->read(rawExif.pData_, rawExif.size_);
if (io_->error() || io_->eof()) throw Error(14);
ByteOrder bo = ExifParser::decode(exifData_, rawExif.pData_, rawExif.size_);
setByteOrder(bo);
if (rawExif.size_ > 0 && byteOrder() == invalidByteOrder) {
#ifndef SUPPRESS_WARNINGS
std::cerr << "Warning: Failed to decode Exif metadata.\n";
#endif
exifData_.clear();
}
break;
}
case kPhotoshopResourceID_XMPPacket:
{
DataBuf xmpPacket(resourceSize);
io_->read(xmpPacket.pData_, xmpPacket.size_);
if (io_->error() || io_->eof()) throw Error(14);
xmpPacket_.assign(reinterpret_cast<char *>(xmpPacket.pData_), xmpPacket.size_);
if (xmpPacket_.size() > 0 && XmpParser::decode(xmpData_, xmpPacket_)) {
#ifndef SUPPRESS_WARNINGS
std::cerr << "Warning: Failed to decode XMP metadata.\n";
#endif
}
break;
}
default:
{
break;
}
}
}
void PsdImage::readResourceBlock(uint16_t resourceId, uint32_t resourceSize)
{
switch(resourceId)
{
case kPhotoshopResourceID_IPTC_NAA:
{
DataBuf rawIPTC(resourceSize);
io_->read(rawIPTC.pData_, rawIPTC.size_);
if (io_->error() || io_->eof()) throw Error(14);
if (IptcParser::decode(iptcData_, rawIPTC.pData_, rawIPTC.size_)) {
#ifndef SUPPRESS_WARNINGS
EXV_WARNING << "Failed to decode IPTC metadata.\n";
#endif
iptcData_.clear();
}
break;
}
case kPhotoshopResourceID_ExifInfo:
{
DataBuf rawExif(resourceSize);
io_->read(rawExif.pData_, rawExif.size_);
if (io_->error() || io_->eof()) throw Error(14);
ByteOrder bo = ExifParser::decode(exifData_, rawExif.pData_, rawExif.size_);
setByteOrder(bo);
if (rawExif.size_ > 0 && byteOrder() == invalidByteOrder) {
#ifndef SUPPRESS_WARNINGS
EXV_WARNING << "Failed to decode Exif metadata.\n";
#endif
exifData_.clear();
}
break;
}
case kPhotoshopResourceID_XMPPacket:
{
DataBuf xmpPacket(resourceSize);
io_->read(xmpPacket.pData_, xmpPacket.size_);
if (io_->error() || io_->eof()) throw Error(14);
xmpPacket_.assign(reinterpret_cast<char *>(xmpPacket.pData_), xmpPacket.size_);
if (xmpPacket_.size() > 0 && XmpParser::decode(xmpData_, xmpPacket_)) {
#ifndef SUPPRESS_WARNINGS
EXV_WARNING << "Failed to decode XMP metadata.\n";
#endif
}
break;
}
// - PS 4.0 preview data is fetched from ThumbnailResource
// - PS >= 5.0 preview data is fetched from ThumbnailResource2
case kPhotoshopResourceID_ThumbnailResource:
case kPhotoshopResourceID_ThumbnailResource2:
{
/*
Photoshop thumbnail resource header
offset length name description
====== ======== ==== ===========
0 4 bytes format = 1 (kJpegRGB). Also supports kRawRGB (0).
4 4 bytes width Width of thumbnail in pixels.
8 4 bytes height Height of thumbnail in pixels.
12 4 bytes widthbytes Padded row bytes as (width * bitspixel + 31) / 32 * 4.
16 4 bytes size Total size as widthbytes * height * planes
20 4 bytes compressedsize Size after compression. Used for consistentcy check.
24 2 bytes bitspixel = 24. Bits per pixel.
26 2 bytes planes = 1. Number of planes.
28 variable data JFIF data in RGB format.
Note: For resource ID 1033 the data is in BGR format.
*/
byte buf[28];
if (io_->read(buf, 28) != 28)
{
throw Error(3, "Photoshop");
}
NativePreview nativePreview;
nativePreview.position_ = io_->tell();
nativePreview.size_ = getLong(buf + 20, bigEndian); // compressedsize
nativePreview.width_ = getLong(buf + 4, bigEndian);
nativePreview.height_ = getLong(buf + 8, bigEndian);
const uint32_t format = getLong(buf + 0, bigEndian);
if (nativePreview.size_ > 0 && nativePreview.position_ >= 0) {
io_->seek(static_cast<long>(nativePreview.size_), BasicIo::cur);
if (io_->error() || io_->eof()) throw Error(14);
if (format == 1) {
nativePreview.filter_ = "";
nativePreview.mimeType_ = "image/jpeg";
nativePreviews_.push_back(nativePreview);
} else {
// unsupported format of native preview
}
}
break;
}
default:
{
break;
}
}
} // PsdImage::readResourceBlock
