void dng_jpeg_preview::WriteData (dng_host & /* host */,
dng_image_writer & /* writer */,
dng_basic_tag_set &basic,
dng_stream &stream) const
{
basic.SetTileOffset (0, (uint32) stream.Position ());
basic.SetTileByteCount (0, fCompressedData->LogicalSize ());
stream.Put (fCompressedData->Buffer (),
fCompressedData->LogicalSize ());
if (fCompressedData->LogicalSize () & 1)
{
stream.Put_uint8 (0);
}
}
void dng_jpeg_preview::SpoolAdobeThumbnail (dng_stream &stream) const
{
DNG_ASSERT (fCompressedData.Get (),
"SpoolAdobeThumbnail: no data");
DNG_ASSERT (fPhotometricInterpretation == piYCbCr,
"SpoolAdobeThumbnail: Non-YCbCr");
uint32 compressedSize = fCompressedData->LogicalSize ();
stream.Put_uint32 (DNG_CHAR4 ('8','B','I','M'));
stream.Put_uint16 (1036);
stream.Put_uint16 (0);
stream.Put_uint32 (compressedSize + 28);
uint32 widthBytes = (fPreviewSize.h * 24 + 31) / 32 * 4;
stream.Put_uint32 (1);
stream.Put_uint32 (fPreviewSize.h);
stream.Put_uint32 (fPreviewSize.v);
stream.Put_uint32 (widthBytes);
stream.Put_uint32 (widthBytes * fPreviewSize.v);
stream.Put_uint32 (compressedSize);
stream.Put_uint16 (24);
stream.Put_uint16 (1);
stream.Put (fCompressedData->Buffer (),
compressedSize);
if (compressedSize & 1)
{
stream.Put_uint8 (0);
}
}
void dng_iptc::SpoolString (dng_stream &stream,
const dng_string &s,
uint8 dataSet,
uint32 maxChars,
CharSet charSet)
{
if (s.IsEmpty ())
{
return;
}
stream.Put_uint16 (0x1C02);
stream.Put_uint8 (dataSet);
dng_string ss (s);
ss.SetLineEndingsToReturns ();
if (charSet == kCharSetUTF8)
{
// UTF-8 encoding.
if (ss.Length () > maxChars)
{
ss.Truncate (maxChars);
}
uint32 len = ss.Length ();
stream.Put_uint16 ((uint16) len);
stream.Put (ss.Get (), len);
}
else
{
// System character set encoding.
dng_memory_data buffer;
uint32 len = ss.Get_SystemEncoding (buffer);
if (len > maxChars)
{
uint32 lower = 0;
uint32 upper = ss.Length () - 1;
while (upper > lower)
{
uint32 middle = (upper + lower + 1) >> 1;
dng_string sss (ss);
sss.Truncate (middle);
len = sss.Get_SystemEncoding (buffer);
if (len <= maxChars)
{
lower = middle;
}
else
{
upper = middle - 1;
}
}
ss.Truncate (lower);
len = ss.Get_SystemEncoding (buffer);
}
stream.Put_uint16 ((uint16) len);
stream.Put (buffer.Buffer_char (), len);
}