bool
DPXOutput::open (const std::string &name, const ImageSpec &userspec,
OpenMode mode)
{
if (mode == Create) {
m_subimage = 0;
if (m_subimage_specs.size() < 1) {
m_subimage_specs.resize (1);
m_subimage_specs[0] = userspec;
m_subimages_to_write = 1;
}
} else if (mode == AppendSubimage) {
if (m_write_pending)
write_buffer ();
++m_subimage;
if (m_subimage >= m_subimages_to_write) {
error ("Exceeded the pre-declared number of subimages (%d)",
m_subimages_to_write);
return false;
}
return prep_subimage (m_subimage, true);
// Nothing else to do, the header taken care of when we opened with
// Create.
} else if (mode == AppendMIPLevel) {
error ("DPX does not support MIP-maps");
return false;
}
// From here out, all the heavy lifting is done for Create
ASSERT (mode == Create);
if (is_opened())
close (); // Close any already-opened file
m_stream = new OutStream();
if (! m_stream->Open(name.c_str ())) {
error ("Could not open file \"%s\"", name.c_str ());
return false;
}
m_dpx.SetOutStream (m_stream);
m_dpx.Start ();
m_subimage = 0;
ImageSpec &m_spec (m_subimage_specs[m_subimage]); // alias the spec
// Check for things this format doesn't support
if (m_spec.width < 1 || m_spec.height < 1) {
error ("Image resolution must be at least 1x1, you asked for %d x %d",
m_spec.width, m_spec.height);
return false;
}
if (m_spec.depth < 1)
m_spec.depth = 1;
else if (m_spec.depth > 1) {
error ("DPX does not support volume images (depth > 1)");
return false;
}
// some metadata
std::string software = m_spec.get_string_attribute ("Software", "");
std::string project = m_spec.get_string_attribute ("DocumentName", "");
std::string copyright = m_spec.get_string_attribute ("Copyright", "");
std::string datestr = m_spec.get_string_attribute ("DateTime", "");
if (datestr.size () >= 19) {
// libdpx's date/time format is pretty close to OIIO's (libdpx uses
// %Y:%m:%d:%H:%M:%S%Z)
// NOTE: the following code relies on the DateTime attribute being properly
// formatted!
// assume UTC for simplicity's sake, fix it if someone complains
datestr[10] = ':';
datestr.replace (19, -1, "Z");
}
// check if the client wants endianness reverse to native
// assume big endian per Jeremy's request, unless little endian is
// explicitly specified
std::string endian = m_spec.get_string_attribute ("oiio:Endian", littleendian() ? "little" : "big");
m_wantSwap = (littleendian() != Strutil::iequals (endian, "little"));
m_dpx.SetFileInfo (name.c_str (), // filename
datestr.c_str (), // cr. date
software.empty () ? OIIO_INTRO_STRING : software.c_str (), // creator
project.empty () ? NULL : project.c_str (), // project
copyright.empty () ? NULL : copyright.c_str (), // copyright
m_spec.get_int_attribute ("dpx:EncryptKey", ~0), // encryption key
m_wantSwap);
// image info
m_dpx.SetImageInfo (m_spec.width, m_spec.height);
for (int s = 0; s < m_subimages_to_write; ++s) {
prep_subimage (s, false);
m_dpx.header.SetBitDepth (s, m_bitdepth);
ImageSpec &spec (m_subimage_specs[s]);
bool datasign = (spec.format == TypeDesc::INT8 ||
spec.format == TypeDesc::INT16);
m_dpx.SetElement (s, m_desc, m_bitdepth, m_transfer, m_cmetr,
m_packing, dpx::kNone, datasign,
spec.get_int_attribute ("dpx:LowData", 0xFFFFFFFF),
spec.get_float_attribute ("dpx:LowQuantity", std::numeric_limits<float>::quiet_NaN()),
spec.get_int_attribute ("dpx:HighData", 0xFFFFFFFF),
spec.get_float_attribute ("dpx:HighQuantity", std::numeric_limits<float>::quiet_NaN()),
spec.get_int_attribute ("dpx:EndOfLinePadding", 0),
spec.get_int_attribute ("dpx:EndOfImagePadding", 0));
std::string desc = spec.get_string_attribute ("ImageDescription", "");
m_dpx.header.SetDescription (s, desc.c_str());
}
m_dpx.header.SetXScannedSize (m_spec.get_float_attribute
("dpx:XScannedSize", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetYScannedSize (m_spec.get_float_attribute
("dpx:YScannedSize", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetFramePosition (m_spec.get_int_attribute
("dpx:FramePosition", 0xFFFFFFFF));
m_dpx.header.SetSequenceLength (m_spec.get_int_attribute
("dpx:SequenceLength", 0xFFFFFFFF));
m_dpx.header.SetHeldCount (m_spec.get_int_attribute
("dpx:HeldCount", 0xFFFFFFFF));
m_dpx.header.SetFrameRate (m_spec.get_float_attribute
("dpx:FrameRate", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetShutterAngle (m_spec.get_float_attribute
("dpx:ShutterAngle", std::numeric_limits<float>::quiet_NaN()));
// FIXME: should we write the input version through or always default to 2.0?
/*tmpstr = m_spec.get_string_attribute ("dpx:Version", "");
if (tmpstr.size () > 0)
m_dpx.header.SetVersion (tmpstr.c_str ());*/
std::string tmpstr;
tmpstr = m_spec.get_string_attribute ("dpx:FrameId", "");
if (tmpstr.size () > 0)
m_dpx.header.SetFrameId (tmpstr.c_str ());
tmpstr = m_spec.get_string_attribute ("dpx:SlateInfo", "");
if (tmpstr.size () > 0)
m_dpx.header.SetSlateInfo (tmpstr.c_str ());
tmpstr = m_spec.get_string_attribute ("dpx:SourceImageFileName", "");
if (tmpstr.size () > 0)
m_dpx.header.SetSourceImageFileName (tmpstr.c_str ());
tmpstr = m_spec.get_string_attribute ("dpx:InputDevice", "");
if (tmpstr.size () > 0)
m_dpx.header.SetInputDevice (tmpstr.c_str ());
tmpstr = m_spec.get_string_attribute ("dpx:InputDeviceSerialNumber", "");
if (tmpstr.size () > 0)
m_dpx.header.SetInputDeviceSerialNumber (tmpstr.c_str ());
m_dpx.header.SetInterlace (m_spec.get_int_attribute ("dpx:Interlace", 0xFF));
m_dpx.header.SetFieldNumber (m_spec.get_int_attribute ("dpx:FieldNumber", 0xFF));
m_dpx.header.SetHorizontalSampleRate (m_spec.get_float_attribute
("dpx:HorizontalSampleRate", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetVerticalSampleRate (m_spec.get_float_attribute
("dpx:VerticalSampleRate", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetTemporalFrameRate (m_spec.get_float_attribute
("dpx:TemporalFrameRate", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetTimeOffset (m_spec.get_float_attribute
("dpx:TimeOffset", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetBlackLevel (m_spec.get_float_attribute
("dpx:BlackLevel", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetBlackGain (m_spec.get_float_attribute
("dpx:BlackGain", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetBreakPoint (m_spec.get_float_attribute
("dpx:BreakPoint", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetWhiteLevel (m_spec.get_float_attribute
("dpx:WhiteLevel", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetIntegrationTimes (m_spec.get_float_attribute
("dpx:IntegrationTimes", std::numeric_limits<float>::quiet_NaN()));
float aspect = m_spec.get_float_attribute ("PixelAspectRatio", 1.0f);
int aspect_num, aspect_den;
float_to_rational (aspect, aspect_num, aspect_den);
m_dpx.header.SetAspectRatio (0, aspect_num);
m_dpx.header.SetAspectRatio (1, aspect_den);
m_dpx.header.SetXOffset ((unsigned int)std::max (0, m_spec.x));
m_dpx.header.SetYOffset ((unsigned int)std::max (0, m_spec.y));
m_dpx.header.SetXOriginalSize ((unsigned int)m_spec.full_width);
m_dpx.header.SetYOriginalSize ((unsigned int)m_spec.full_height);
static int DpxOrientations[] = { 0,
dpx::kLeftToRightTopToBottom, dpx::kRightToLeftTopToBottom,
dpx::kLeftToRightBottomToTop, dpx::kRightToLeftBottomToTop,
dpx::kTopToBottomLeftToRight, dpx::kTopToBottomRightToLeft,
dpx::kBottomToTopLeftToRight, dpx::kBottomToTopRightToLeft };
int orient = m_spec.get_int_attribute ("Orientation", 0);
orient = DpxOrientations[clamp (orient, 0, 8)];
m_dpx.header.SetImageOrientation ((dpx::Orientation)orient);
ImageIOParameter *tc = m_spec.find_attribute("smpte:TimeCode", TypeDesc::TypeTimeCode, false);
if (tc) {
unsigned int *timecode = (unsigned int*) tc->data();
m_dpx.header.timeCode = timecode[0];
m_dpx.header.userBits = timecode[1];
}
else {
std::string timecode = m_spec.get_string_attribute ("dpx:TimeCode", "");
int tmpint = m_spec.get_int_attribute ("dpx:TimeCode", ~0);
if (timecode.size () > 0)
m_dpx.header.SetTimeCode (timecode.c_str ());
else if (tmpint != ~0)
m_dpx.header.timeCode = tmpint;
m_dpx.header.userBits = m_spec.get_int_attribute ("dpx:UserBits", ~0);
}
ImageIOParameter *kc = m_spec.find_attribute("smpte:KeyCode", TypeDesc::TypeKeyCode, false);
if (kc) {
int *array = (int*) kc->data();
set_keycode_values(array);
// See if there is an overloaded dpx:Format
std::string format = m_spec.get_string_attribute ("dpx:Format", "");
if (format.size () > 0)
m_dpx.header.SetFormat (format.c_str ());
}
std::string srcdate = m_spec.get_string_attribute ("dpx:SourceDateTime", "");
if (srcdate.size () >= 19) {
// libdpx's date/time format is pretty close to OIIO's (libdpx uses
// %Y:%m:%d:%H:%M:%S%Z)
// NOTE: the following code relies on the DateTime attribute being properly
// formatted!
// assume UTC for simplicity's sake, fix it if someone complains
srcdate[10] = ':';
srcdate.replace (19, -1, "Z");
m_dpx.header.SetSourceTimeDate (srcdate.c_str ());
}
// set the user data size
ImageIOParameter *user = m_spec.find_attribute ("dpx:UserData");
if (user && user->datasize () > 0 && user->datasize () <= 1024 * 1024) {
m_dpx.SetUserData (user->datasize ());
}
// commit!
if (!m_dpx.WriteHeader ()) {
error ("Failed to write DPX header");
return false;
}
// write the user data
if (user && user->datasize () > 0 && user->datasize() <= 1024 * 1024) {
if (!m_dpx.WriteUserData ((void *)user->data ())) {
error ("Failed to write user data");
return false;
}
}
m_dither = (m_spec.format == TypeDesc::UINT8) ?
m_spec.get_int_attribute ("oiio:dither", 0) : 0;
// If user asked for tiles -- which this format doesn't support, emulate
// it by buffering the whole image.
if (m_spec.tile_width && m_spec.tile_height)
m_tilebuffer.resize (m_spec.image_bytes());
return prep_subimage (m_subimage, true);
}
bool
DPXOutput::open (const std::string &name, const ImageSpec &userspec,
OpenMode mode)
{
close (); // Close any already-opened file
if (mode != Create) {
error ("%s does not support subimages or MIP levels", format_name());
return false;
}
m_spec = userspec; // Stash the spec
// open the image
m_stream = new OutStream();
if (! m_stream->Open(name.c_str ())) {
error ("Could not open file \"%s\"", name.c_str ());
return false;
}
// Check for things this format doesn't support
if (m_spec.width < 1 || m_spec.height < 1) {
error ("Image resolution must be at least 1x1, you asked for %d x %d",
m_spec.width, m_spec.height);
return false;
}
if (m_spec.depth < 1)
m_spec.depth = 1;
else if (m_spec.depth > 1) {
error ("DPX does not support volume images (depth > 1)");
return false;
}
if (m_spec.format == TypeDesc::UINT8
|| m_spec.format == TypeDesc::INT8)
m_datasize = dpx::kByte;
else if (m_spec.format == TypeDesc::UINT16
|| m_spec.format == TypeDesc::INT16)
m_datasize = dpx::kWord;
else if (m_spec.format == TypeDesc::FLOAT
|| m_spec.format == TypeDesc::HALF) {
m_spec.format = TypeDesc::FLOAT;
m_datasize = dpx::kFloat;
} else if (m_spec.format == TypeDesc::DOUBLE)
m_datasize = dpx::kDouble;
else {
// use 16-bit unsigned integers as a failsafe
m_spec.format = TypeDesc::UINT16;
m_datasize = dpx::kWord;
}
// check if the client is giving us raw data to write
m_wantRaw = m_spec.get_int_attribute ("dpx:RawData", 0) != 0;
// check if the client wants endianness reverse to native
// assume big endian per Jeremy's request, unless little endian is
// explicitly specified
std::string tmpstr = m_spec.get_string_attribute ("oiio:Endian", littleendian() ? "little" : "big");
m_wantSwap = (littleendian() != Strutil::iequals (tmpstr, "little"));
m_dpx.SetOutStream (m_stream);
// start out the file
m_dpx.Start ();
// some metadata
std::string project = m_spec.get_string_attribute ("DocumentName", "");
std::string copyright = m_spec.get_string_attribute ("Copyright", "");
tmpstr = m_spec.get_string_attribute ("DateTime", "");
if (tmpstr.size () >= 19) {
// libdpx's date/time format is pretty close to OIIO's (libdpx uses
// %Y:%m:%d:%H:%M:%S%Z)
// NOTE: the following code relies on the DateTime attribute being properly
// formatted!
// assume UTC for simplicity's sake, fix it if someone complains
tmpstr[10] = ':';
tmpstr.replace (19, -1, "Z");
}
m_dpx.SetFileInfo (name.c_str (), // filename
tmpstr.c_str (), // cr. date
OIIO_INTRO_STRING, // creator
project.empty () ? NULL : project.c_str (), // project
copyright.empty () ? NULL : copyright.c_str (), // copyright
m_spec.get_int_attribute ("dpx:EncryptKey", ~0), // encryption key
m_wantSwap);
// image info
m_dpx.SetImageInfo (m_spec.width, m_spec.height);
// determine descriptor
m_desc = get_descriptor_from_string
(m_spec.get_string_attribute ("dpx:ImageDescriptor", ""));
// transfer function
dpx::Characteristic transfer;
std::string colorspace = m_spec.get_string_attribute ("oiio:ColorSpace", "");
if (Strutil::iequals (colorspace, "Linear")) transfer = dpx::kLinear;
else if (Strutil::iequals (colorspace, "GammaCorrected")) transfer = dpx::kUserDefined;
else if (Strutil::iequals (colorspace, "Rec709")) transfer = dpx::kITUR709;
else if (Strutil::iequals (colorspace, "KodakLog")) transfer = dpx::kLogarithmic;
else {
std::string dpxtransfer = m_spec.get_string_attribute ("dpx:Transfer", "");
transfer = get_characteristic_from_string (dpxtransfer);
}
// colorimetric
m_cmetr = get_characteristic_from_string
(m_spec.get_string_attribute ("dpx:Colorimetric", "User defined"));
// select packing method
dpx::Packing packing;
tmpstr = m_spec.get_string_attribute ("dpx:Packing", "Filled, method A");
if (Strutil::iequals (tmpstr, "Packed"))
packing = dpx::kPacked;
else if (Strutil::iequals (tmpstr, "Filled, method B"))
packing = dpx::kFilledMethodB;
else
packing = dpx::kFilledMethodA;
// calculate target bit depth
int bitDepth = m_spec.format.size () * 8;
if (m_spec.format == TypeDesc::UINT16) {
bitDepth = m_spec.get_int_attribute ("oiio:BitsPerSample", 16);
if (bitDepth != 10 && bitDepth != 12 && bitDepth != 16) {
error ("Unsupported bit depth %d", bitDepth);
return false;
}
}
m_dpx.header.SetBitDepth (0, bitDepth);
// Bug workaround: libDPX doesn't appear to correctly support
// "filled method A" for 12 bit data. Does anybody care what
// packing/filling we use? Punt and just use "packed".
if (bitDepth == 12)
packing = dpx::kPacked;
// see if we'll need to convert or not
if (m_desc == dpx::kRGB || m_desc == dpx::kRGBA) {
// shortcut for RGB(A) that gets the job done
m_bytes = m_spec.scanline_bytes ();
m_wantRaw = true;
} else {
m_bytes = dpx::QueryNativeBufferSize (m_desc, m_datasize, m_spec.width, 1);
if (m_bytes == 0 && !m_wantRaw) {
error ("Unable to deliver native format data from source data");
return false;
} else if (m_bytes < 0) {
// no need to allocate another buffer
if (!m_wantRaw)
m_bytes = m_spec.scanline_bytes ();
else
m_bytes = -m_bytes;
}
}
if (m_bytes < 0)
m_bytes = -m_bytes;
m_dpx.SetElement (0, m_desc, bitDepth, transfer, m_cmetr,
packing, dpx::kNone, (m_spec.format == TypeDesc::INT8
|| m_spec.format == TypeDesc::INT16) ? 1 : 0,
m_spec.get_int_attribute ("dpx:LowData", 0xFFFFFFFF),
m_spec.get_float_attribute ("dpx:LowQuantity", std::numeric_limits<float>::quiet_NaN()),
m_spec.get_int_attribute ("dpx:HighData", 0xFFFFFFFF),
m_spec.get_float_attribute ("dpx:HighQuantity", std::numeric_limits<float>::quiet_NaN()),
m_spec.get_int_attribute ("dpx:EndOfLinePadding", 0),
m_spec.get_int_attribute ("dpx:EndOfImagePadding", 0));
m_dpx.header.SetXScannedSize (m_spec.get_float_attribute
("dpx:XScannedSize", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetYScannedSize (m_spec.get_float_attribute
("dpx:YScannedSize", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetFramePosition (m_spec.get_int_attribute
("dpx:FramePosition", 0xFFFFFFFF));
m_dpx.header.SetSequenceLength (m_spec.get_int_attribute
("dpx:SequenceLength", 0xFFFFFFFF));
m_dpx.header.SetHeldCount (m_spec.get_int_attribute
("dpx:HeldCount", 0xFFFFFFFF));
m_dpx.header.SetFrameRate (m_spec.get_float_attribute
("dpx:FrameRate", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetShutterAngle (m_spec.get_float_attribute
("dpx:ShutterAngle", std::numeric_limits<float>::quiet_NaN()));
// FIXME: should we write the input version through or always default to 2.0?
/*tmpstr = m_spec.get_string_attribute ("dpx:Version", "");
if (tmpstr.size () > 0)
m_dpx.header.SetVersion (tmpstr.c_str ());*/
tmpstr = m_spec.get_string_attribute ("dpx:Format", "");
if (tmpstr.size () > 0)
m_dpx.header.SetFormat (tmpstr.c_str ());
tmpstr = m_spec.get_string_attribute ("dpx:FrameId", "");
if (tmpstr.size () > 0)
m_dpx.header.SetFrameId (tmpstr.c_str ());
tmpstr = m_spec.get_string_attribute ("dpx:SlateInfo", "");
if (tmpstr.size () > 0)
m_dpx.header.SetSlateInfo (tmpstr.c_str ());
tmpstr = m_spec.get_string_attribute ("dpx:SourceImageFileName", "");
if (tmpstr.size () > 0)
m_dpx.header.SetSourceImageFileName (tmpstr.c_str ());
tmpstr = m_spec.get_string_attribute ("dpx:InputDevice", "");
if (tmpstr.size () > 0)
m_dpx.header.SetInputDevice (tmpstr.c_str ());
tmpstr = m_spec.get_string_attribute ("dpx:InputDeviceSerialNumber", "");
if (tmpstr.size () > 0)
m_dpx.header.SetInputDeviceSerialNumber (tmpstr.c_str ());
m_dpx.header.SetInterlace (m_spec.get_int_attribute ("dpx:Interlace", 0xFF));
m_dpx.header.SetFieldNumber (m_spec.get_int_attribute ("dpx:FieldNumber", 0xFF));
m_dpx.header.SetHorizontalSampleRate (m_spec.get_float_attribute
("dpx:HorizontalSampleRate", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetVerticalSampleRate (m_spec.get_float_attribute
("dpx:VerticalSampleRate", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetTemporalFrameRate (m_spec.get_float_attribute
("dpx:TemporalFrameRate", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetTimeOffset (m_spec.get_float_attribute
("dpx:TimeOffset", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetBlackLevel (m_spec.get_float_attribute
("dpx:BlackLevel", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetBlackGain (m_spec.get_float_attribute
("dpx:BlackGain", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetBreakPoint (m_spec.get_float_attribute
("dpx:BreakPoint", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetWhiteLevel (m_spec.get_float_attribute
("dpx:WhiteLevel", std::numeric_limits<float>::quiet_NaN()));
m_dpx.header.SetIntegrationTimes (m_spec.get_float_attribute
("dpx:IntegrationTimes", std::numeric_limits<float>::quiet_NaN()));
float aspect = m_spec.get_float_attribute ("PixelAspectRatio", 1.0f);
int aspect_num, aspect_den;
float_to_rational (aspect, aspect_num, aspect_den);
m_dpx.header.SetAspectRatio (0, aspect_num);
m_dpx.header.SetAspectRatio (1, aspect_den);
tmpstr = m_spec.get_string_attribute ("dpx:TimeCode", "");
int tmpint = m_spec.get_int_attribute ("dpx:TimeCode", ~0);
if (tmpstr.size () > 0)
m_dpx.header.SetTimeCode (tmpstr.c_str ());
else if (tmpint != ~0)
m_dpx.header.timeCode = tmpint;
m_dpx.header.userBits = m_spec.get_int_attribute ("dpx:UserBits", ~0);
tmpstr = m_spec.get_string_attribute ("dpx:SourceDateTime", "");
if (tmpstr.size () >= 19) {
// libdpx's date/time format is pretty close to OIIO's (libdpx uses
// %Y:%m:%d:%H:%M:%S%Z)
// NOTE: the following code relies on the DateTime attribute being properly
// formatted!
// assume UTC for simplicity's sake, fix it if someone complains
tmpstr[10] = ':';
tmpstr.replace (19, -1, "Z");
m_dpx.header.SetSourceTimeDate (tmpstr.c_str ());
}
// commit!
if (!m_dpx.WriteHeader ()) {
error ("Failed to write DPX header");
return false;
}
// user data
ImageIOParameter *user = m_spec.find_attribute ("dpx:UserData");
if (user && user->datasize () > 0) {
if (user->datasize () > 1024 * 1024) {
error ("User data block size exceeds 1 MB");
return false;
}
// FIXME: write the missing libdpx code
/*m_dpx.SetUserData (user->datasize ());
if (!m_dpx.WriteUserData ((void *)user->data ())) {
error ("Failed to write user data");
return false;
}*/
}
// reserve space for the image data buffer
m_buf.reserve (m_bytes * m_spec.height);
return true;
}
bool
DPXOutput::open (const std::string &name, const ImageSpec &userspec,
OpenMode mode)
{
close (); // Close any already-opened file
if (mode != Create) {
error ("%s does not support subimages or MIP levels", format_name());
return false;
}
m_spec = userspec; // Stash the spec
// open the image
m_stream = new OutStream();
if (! m_stream->Open(name.c_str ())) {
error ("Could not open file \"%s\"", name.c_str ());
return false;
}
// Check for things this format doesn't support
if (m_spec.width < 1 || m_spec.height < 1) {
error ("Image resolution must be at least 1x1, you asked for %d x %d",
m_spec.width, m_spec.height);
return false;
}
if (m_spec.depth < 1)
m_spec.depth = 1;
else if (m_spec.depth > 1) {
error ("DPX does not support volume images (depth > 1)");
return false;
}
if (m_spec.format == TypeDesc::UINT8
|| m_spec.format == TypeDesc::INT8)
m_datasize = dpx::kByte;
else if (m_spec.format == TypeDesc::UINT16
|| m_spec.format == TypeDesc::INT16)
m_datasize = dpx::kWord;
else if (m_spec.format == TypeDesc::FLOAT
|| m_spec.format == TypeDesc::HALF) {
m_spec.format = TypeDesc::FLOAT;
m_datasize = dpx::kFloat;
} else if (m_spec.format == TypeDesc::DOUBLE)
m_datasize = dpx::kDouble;
else {
// use 16-bit unsigned integers as a failsafe
m_spec.format = TypeDesc::UINT16;
m_datasize = dpx::kWord;
}
// check if the client is giving us raw data to write
m_wantRaw = m_spec.get_int_attribute ("dpx:RawData", 0) != 0;
m_dpx.SetOutStream (m_stream);
// start out the file
m_dpx.Start ();
// some metadata
std::string project = m_spec.get_string_attribute ("DocumentName", "");
std::string copyright = m_spec.get_string_attribute ("Copyright", "");
m_dpx.SetFileInfo (name.c_str (), // filename
NULL, // TODO: cr. date
OIIO_INTRO_STRING, // creator
project.empty () ? NULL : project.c_str (), // project
copyright.empty () ? NULL : copyright.c_str ()); // copyright
// image info
m_dpx.SetImageInfo (m_spec.width, m_spec.height);
// determine descriptor
m_desc = get_descriptor_from_string
(m_spec.get_string_attribute ("dpx:ImageDescriptor", ""));
// transfer function
dpx::Characteristic transfer;
std::string colorspace = m_spec.get_string_attribute ("oiio:ColorSpace", "");
if (iequals (colorspace, "Linear")) transfer = dpx::kLinear;
else if (iequals (colorspace, "GammaCorrected")) transfer = dpx::kUserDefined;
else if (iequals (colorspace, "Rec709")) transfer = dpx::kITUR709;
else if (iequals (colorspace, "KodakLog")) transfer = dpx::kLogarithmic;
else {
std::string dpxtransfer = m_spec.get_string_attribute ("dpx:Transfer", "");
transfer = get_characteristic_from_string (dpxtransfer);
}
// colorimetric
m_cmetr = get_characteristic_from_string
(m_spec.get_string_attribute ("dpx:Colorimetric", "User defined"));
// select packing method
dpx::Packing packing;
std::string tmpstr = m_spec.get_string_attribute ("dpx:ImagePacking", "Filled, method A");
if (iequals (tmpstr, "Packed"))
packing = dpx::kPacked;
else if (iequals (tmpstr, "Filled, method B"))
packing = dpx::kFilledMethodB;
else
packing = dpx::kFilledMethodA;
// calculate target bit depth
int bitDepth = m_spec.get_int_attribute ("oiio:BitsPerSample",
m_spec.format.size () * 8);
if (bitDepth % 8 != 0 && bitDepth != 10 && bitDepth != 12) {
error ("Unsupported bit depth %d", bitDepth);
return false;
}
// see if we'll need to convert or not
if (m_desc == dpx::kRGB || m_desc == dpx::kRGBA) {
// shortcut for RGB(A) that gets the job done
m_bytes = m_spec.scanline_bytes ();
m_wantRaw = true;
} else {
m_bytes = dpx::QueryNativeBufferSize (m_desc, m_datasize, m_spec.width, 1);
if (m_bytes == 0 && !m_wantRaw) {
error ("Unable to deliver native format data from source data");
return false;
} else if (m_bytes < 0) {
// no need to allocate another buffer
if (!m_wantRaw)
m_bytes = m_spec.scanline_bytes ();
else
m_bytes = -m_bytes;
}
}
if (m_bytes < 0)
m_bytes = -m_bytes;
m_dpx.SetElement (0, m_desc, bitDepth, transfer, m_cmetr,
packing, dpx::kNone, (m_spec.format == TypeDesc::INT8
|| m_spec.format == TypeDesc::INT16) ? 1 : 0);
// commit!
if (!m_dpx.WriteHeader ()) {
error ("Failed to write DPX header");
return false;
}
// user data
ImageIOParameter *user = m_spec.find_attribute ("dpx:UserData");
if (user && user->datasize () > 0) {
if (user->datasize () > 1024 * 1024) {
error ("User data block size exceeds 1 MB");
return false;
}
// FIXME: write the missing libdpx code
/*m_dpx.SetUserData (user->datasize ());
if (!m_dpx.WriteUserData ((void *)user->data ())) {
error ("Failed to write user data");
return false;
}*/
}
// reserve space for the image data buffer
m_buf.reserve (m_bytes * m_spec.height);
return true;
}