void write_half_exr( const boost::filesystem::path& p, Imf::Header& header,
const image::const_image_view_t& view, bool write_alpha)
{
boost::gil::rgba16f_image_t img( view.width(), view.height());
boost::gil::copy_and_convert_pixels( view, boost::gil::view( img));
header.channels().insert( "R", Imf::HALF);
header.channels().insert( "G", Imf::HALF);
header.channels().insert( "B", Imf::HALF);
if( write_alpha)
header.channels().insert( "A", Imf::HALF);
Imf::FrameBuffer frameBuffer;
char *ptr = (char *) boost::gil::interleaved_view_get_raw_data( boost::gil::view( img));
std::size_t xstride = 4 * sizeof(half);
std::size_t ystride = xstride * img.width();
frameBuffer.insert( "R", Imf::Slice( Imf::HALF, ptr, xstride, ystride)); ptr += sizeof(half);
frameBuffer.insert( "G", Imf::Slice( Imf::HALF, ptr, xstride, ystride)); ptr += sizeof(half);
frameBuffer.insert( "B", Imf::Slice( Imf::HALF, ptr, xstride, ystride)); ptr += sizeof(half);
if( write_alpha)
frameBuffer.insert( "A", Imf::Slice( Imf::HALF, ptr, xstride, ystride));
Imf::OutputFile out_file( p.external_file_string().c_str(), header);
out_file.setFrameBuffer( frameBuffer);
out_file.writePixels( img.height());
}
void SaveExr(const Image<unsigned char>& image_in, const pangolin::PixelFormat& fmt, const std::string& filename, bool top_line_first)
{
PANGOLIN_UNUSED(image_in);
PANGOLIN_UNUSED(fmt);
PANGOLIN_UNUSED(filename);
PANGOLIN_UNUSED(top_line_first);
#ifdef HAVE_OPENEXR
ManagedImage<unsigned char> flip_image;
Image<unsigned char> image;
if(top_line_first) {
image = image_in;
}else{
flip_image.Reinitialise(image_in.pitch,image_in.h);
for(size_t y=0; y<image_in.h; ++y) {
std::memcpy(flip_image.RowPtr(y), image_in.RowPtr(y), image_in.pitch);
}
image = flip_image;
}
Imf::Header header (image.w, image.h);
SetOpenEXRChannels(header.channels(), fmt);
Imf::OutputFile file (filename.c_str(), header);
Imf::FrameBuffer frameBuffer;
int ch=0;
size_t ch_bits = 0;
for(Imf::ChannelList::Iterator it = header.channels().begin(); it != header.channels().end(); ++it)
{
frameBuffer.insert(
it.name(),
Imf::Slice(
it.channel().type,
(char*)image.ptr + ch_bits/8,
fmt.channel_bits[ch]/8,
image.pitch
)
);
ch_bits += fmt.channel_bits[ch++];
}
file.setFrameBuffer(frameBuffer);
file.writePixels(image.h);
#else
throw std::runtime_error("EXR Support not enabled. Please rebuild Pangolin.");
#endif // HAVE_OPENEXR
}
void SaveExr(const Image<unsigned char>& image_in, const pangolin::VideoPixelFormat& fmt, const std::string& filename, bool top_line_first)
{
#ifdef HAVE_OPENEXR
Image<unsigned char> image;
if(top_line_first) {
image = image_in;
}else{
image.Alloc(image_in.w,image_in.h,image_in.pitch);
for(size_t y=0; y<image_in.h; ++y) {
std::memcpy(image.ptr + y*image.pitch, image_in.ptr + (image_in.h-y-1)*image_in.pitch, image.pitch);
}
}
Imf::Header header (image.w, image.h);
SetOpenEXRChannels(header.channels(), fmt);
Imf::OutputFile file (filename.c_str(), header);
Imf::FrameBuffer frameBuffer;
int ch=0;
size_t ch_bits = 0;
for(Imf::ChannelList::Iterator it = header.channels().begin(); it != header.channels().end(); ++it)
{
frameBuffer.insert(
it.name(),
Imf::Slice(
it.channel().type,
(char*)image.ptr + ch_bits/8,
fmt.channel_bits[ch]/8,
image.pitch
)
);
ch_bits += fmt.channel_bits[ch++];
}
file.setFrameBuffer(frameBuffer);
file.writePixels(image.h);
if(!top_line_first) {
image.Dealloc();
}
#else
throw std::runtime_error("EXR Support not enabled. Please rebuild Pangolin.");
#endif // HAVE_OPENEXR
}
bool ImageIO::writeImage(QVector<float> &pixels, const QString &filePath, const LayerDesc &desc, int width, int height)
{
try
{
Imf::Header header (width, height);
Imf::FrameBuffer frameBuffer;
for (int chan = 0; chan < desc.numChannels(); chan++) {
QString chan_name = QString("%1.%2").arg(desc._layer_name).arg(desc._channels[chan]);
header.channels().insert(qPrintable(chan_name), Imf::Channel(Imf::FLOAT));
frameBuffer.insert(qPrintable(chan_name), Imf::Slice(Imf::FLOAT, (char *) pixels.data() + chan*sizeof(float), sizeof(float)*desc.numChannels(), sizeof(float)*width*desc.numChannels()));
}
Imf::OutputFile file(qPrintable(remapFilePath(filePath)), header);
file.setFrameBuffer(frameBuffer);
file.writePixels(height);
}
catch (const std::exception &e)
{
qWarning() << e.what();
return false;
}
return true;
}
void write_half_rgb_exr( Imf::OStream& os, Imf::Header& header, const image::const_image_view_t& view)
{
boost::gil::rgba16f_image_t img( view.width(), view.height());
boost::gil::copy_and_convert_pixels( view, boost::gil::view( img));
header.channels().insert( "R", Imf::HALF);
header.channels().insert( "G", Imf::HALF);
header.channels().insert( "B", Imf::HALF);
Imf::FrameBuffer frameBuffer;
char *ptr = (char *) boost::gil::interleaved_view_get_raw_data( boost::gil::view( img));
std::size_t xstride = 4 * sizeof(half);
std::size_t ystride = xstride * img.width();
frameBuffer.insert( "R", Imf::Slice( Imf::HALF, ptr, xstride, ystride)); ptr += sizeof(half);
frameBuffer.insert( "G", Imf::Slice( Imf::HALF, ptr, xstride, ystride)); ptr += sizeof(half);
frameBuffer.insert( "B", Imf::Slice( Imf::HALF, ptr, xstride, ystride)); ptr += sizeof(half);
Imf::OutputFile out_file( os, header);
out_file.setFrameBuffer( frameBuffer);
out_file.writePixels( img.height());
}
/** \brief Convert an OpenEXR header to our own header representation.
*
* \param exrHeader - input header
* \param header - output header
*/
void convertHeader(const Imf::Header& exrHeader, CqTexFileHeader& header)
{
// Set width, height
const Imath::Box2i& dataBox = exrHeader.dataWindow();
header.setWidth(dataBox.max.x - dataBox.min.x+1);
header.setHeight(dataBox.max.y - dataBox.min.y+1);
// display window
const Imath::Box2i& displayBox = exrHeader.displayWindow();
header.set<Attr::DisplayWindow>( SqImageRegion(
displayBox.max.x - displayBox.min.x,
displayBox.max.y - displayBox.min.y,
displayBox.min.x - dataBox.min.x,
displayBox.min.y - dataBox.min.y) );
// Set tiling information ?
// Aspect ratio
header.set<Attr::PixelAspectRatio>(exrHeader.pixelAspectRatio());
TqChannelNameMap channelNameMap;
// Convert channel representation
const Imf::ChannelList& exrChannels = exrHeader.channels();
CqChannelList& channels = header.channelList();
for(Imf::ChannelList::ConstIterator i = exrChannels.begin();
i != exrChannels.end(); ++i)
{
// use lower case names for channels; OpenEXR uses upper case.
std::string chanName = i.name();
std::transform(chanName.begin(), chanName.end(), chanName.begin(),
::tolower);
channelNameMap[chanName] = i.name();
channels.addChannel( SqChannelInfo(chanName,
channelTypeFromExr(i.channel().type)) );
}
header.set<Attr::ExrChannelNameMap>(channelNameMap);
channels.reorderChannels();
// Set compresssion type
header.set<Attr::Compression>(exrCompressionToString(exrHeader.compression()));
}
static BOOL DLL_CALLCONV
Save(FreeImageIO *io, FIBITMAP *dib, fi_handle handle, int page, int flags, void *data) {
const char *channel_name[4] = { "R", "G", "B", "A" };
BOOL bIsFlipped = FALSE;
half *halfData = NULL;
if(!dib || !handle) return FALSE;
try {
// check for EXR_LC compression and verify that the format is RGB
if((flags & EXR_LC) == EXR_LC) {
FREE_IMAGE_TYPE image_type = FreeImage_GetImageType(dib);
if(((image_type != FIT_RGBF) && (image_type != FIT_RGBAF)) || ((flags & EXR_FLOAT) == EXR_FLOAT)) {
THROW (Iex::IoExc, "EXR_LC compression is only available with RGB[A]F images");
}
if((FreeImage_GetWidth(dib) % 2) || (FreeImage_GetHeight(dib) % 2)) {
THROW (Iex::IoExc, "EXR_LC compression only works when the width and height are a multiple of 2");
}
}
// wrap the FreeImage IO stream
C_OStream ostream(io, handle);
// compression
Imf::Compression compress;
if((flags & EXR_NONE) == EXR_NONE) {
// no compression
compress = Imf::NO_COMPRESSION;
} else if((flags & EXR_ZIP) == EXR_ZIP) {
// zlib compression, in blocks of 16 scan lines
compress = Imf::ZIP_COMPRESSION;
} else if((flags & EXR_PIZ) == EXR_PIZ) {
// piz-based wavelet compression
compress = Imf::PIZ_COMPRESSION;
} else if((flags & EXR_PXR24) == EXR_PXR24) {
// lossy 24-bit float compression
compress = Imf::PXR24_COMPRESSION;
} else if((flags & EXR_B44) == EXR_B44) {
// lossy 44% float compression
compress = Imf::B44_COMPRESSION;
} else {
// default value
compress = Imf::PIZ_COMPRESSION;
}
// create the header
int width = FreeImage_GetWidth(dib);
int height = FreeImage_GetHeight(dib);
int dx = 0, dy = 0;
Imath::Box2i dataWindow (Imath::V2i (0, 0), Imath::V2i (width - 1, height - 1));
Imath::Box2i displayWindow (Imath::V2i (-dx, -dy), Imath::V2i (width - dx - 1, height - dy - 1));
Imf::Header header = Imf::Header(displayWindow, dataWindow, 1,
Imath::V2f(0,0), 1,
Imf::INCREASING_Y, compress);
// handle thumbnail
SetPreviewImage(dib, header);
// check for EXR_LC compression
if((flags & EXR_LC) == EXR_LC) {
return SaveAsEXR_LC(ostream, dib, header, width, height);
}
// output pixel type
Imf::PixelType pixelType;
if((flags & EXR_FLOAT) == EXR_FLOAT) {
pixelType = Imf::FLOAT; // save as float data type
} else {
// default value
pixelType = Imf::HALF; // save as half data type
}
// check the data type and number of channels
int components = 0;
FREE_IMAGE_TYPE image_type = FreeImage_GetImageType(dib);
switch(image_type) {
case FIT_FLOAT:
components = 1;
// insert luminance channel
header.channels().insert ("Y", Imf::Channel(pixelType));
break;
case FIT_RGBF:
components = 3;
for(int c = 0; c < components; c++) {
// insert R, G and B channels
header.channels().insert (channel_name[c], Imf::Channel(pixelType));
}
break;
case FIT_RGBAF:
components = 4;
for(int c = 0; c < components; c++) {
// insert R, G, B and A channels
header.channels().insert (channel_name[c], Imf::Channel(pixelType));
}
break;
default:
THROW (Iex::ArgExc, "Cannot save: invalid data type.\nConvert the image to float before saving as OpenEXR.");
}
// build a frame buffer (i.e. what we have on input)
Imf::FrameBuffer frameBuffer;
BYTE *bits = NULL; // pointer to our pixel buffer
size_t bytespp = 0; // size of our pixel in bytes
size_t bytespc = 0; // size of our pixel component in bytes
unsigned pitch = 0; // size of our yStride in bytes
if(pixelType == Imf::HALF) {
// convert from float to half
halfData = new(std::nothrow) half[width * height * components];
if(!halfData) THROW (Iex::NullExc, FI_MSG_ERROR_MEMORY);
for(int y = 0; y < height; y++) {
float *src_bits = (float*)FreeImage_GetScanLine(dib, height - 1 - y);
half *dst_bits = halfData + y * width * components;
for(int x = 0; x < width; x++) {
for(int c = 0; c < components; c++) {
dst_bits[c] = src_bits[c];
}
src_bits += components;
dst_bits += components;
}
}
bits = (BYTE*)halfData;
bytespc = sizeof(half);
bytespp = sizeof(half) * components;
pitch = sizeof(half) * width * components;
} else if(pixelType == Imf::FLOAT) {
// invert dib scanlines
bIsFlipped = FreeImage_FlipVertical(dib);
bits = FreeImage_GetBits(dib);
bytespc = sizeof(float);
bytespp = sizeof(float) * components;
pitch = FreeImage_GetPitch(dib);
}
if(image_type == FIT_FLOAT) {
frameBuffer.insert ("Y", // name
Imf::Slice (pixelType, // type
(char*)(bits), // base
bytespp, // xStride
pitch)); // yStride
} else if((image_type == FIT_RGBF) || (image_type == FIT_RGBAF)) {
for(int c = 0; c < components; c++) {
char *channel_base = (char*)(bits) + c*bytespc;
frameBuffer.insert (channel_name[c],// name
Imf::Slice (pixelType, // type
channel_base, // base
bytespp, // xStride
pitch)); // yStride
}
}
// write the data
Imf::OutputFile file (ostream, header);
file.setFrameBuffer (frameBuffer);
file.writePixels (height);
if(halfData != NULL) delete[] halfData;
if(bIsFlipped) {
// invert dib scanlines
FreeImage_FlipVertical(dib);
}
return TRUE;
} catch(Iex::BaseExc & e) {
if(halfData != NULL) delete[] halfData;
if(bIsFlipped) {
// invert dib scanlines
FreeImage_FlipVertical(dib);
}
FreeImage_OutputMessageProc(s_format_id, e.what());
return FALSE;
}
}
// All the work is done here
int joinEXRs( int tilesX, int tilesY, const char* baseName, bool deleteTiles, bool Verbose )
{
int exitCode = 0;
// Expand names
if( Verbose ) printf("Image file name = '%s', tilesX=%d, tilesY=%d\n", baseName, tilesX, tilesY);
int numTiles = tilesX * tilesY;
// Allocate memory:
char ** tileNames = new char * [numTiles];
Imf::InputFile ** iFiles = new Imf::InputFile * [numTiles];
for( int i = 0; i < numTiles; i++)
{
tileNames[i] = new char[FILENAME_MAXLEN];
iFiles[i] = 0;
}
// Insert tile info and check if files exist
int nonEmptyTile = -1;
struct stat stFileInfo;
for( int i = 0; i < numTiles; i++)
{
sprintf( tileNames[i], "%s.tile_%d.exr", baseName, i);
if( Verbose ) printf("Tile name %d = '%s'\n", i, tileNames[i]);
if( stat( tileNames[i], &stFileInfo ) == 0 )
{
// File exists - so open it and check for validness
iFiles[i] = new Imf::InputFile( tileNames[i]);
if( false == iFiles[i]->isComplete())
{
fprintf( stderr, "Error: File '%s' is incomplete or is not an OpenEXR file.\n", tileNames[i]); fflush( stderr);
delete iFiles[i];
iFiles[i] = 0;
exitCode = 1;
}
else if( nonEmptyTile == -1 )
{
nonEmptyTile = i;
}
}
else
{
fprintf( stderr, "Error: File '%s' not founded.\n", tileNames[i]); fflush( stderr);
exitCode = 1;
}
}
if( nonEmptyTile < 0) // All tiles were empty
{
fprintf( stderr, "Error: No tile files founded.\n"); fflush( stderr);
}
else
{
// Gather info from a non-empty tile file
Imf::Header inHeader = iFiles[nonEmptyTile]->header();
Imath::Box2i imageBox = inHeader.displayWindow(); // size of the resulting image
int imageWidth = imageBox.max.x - imageBox.min.x + 1;
int imageHeight = imageBox.max.y - imageBox.min.y + 1;
// Iterate through all the channels and reserve mem for the whole display window
// also add channels to the header of the output file
Imf::Header outHeader( imageWidth, imageHeight);
std::map< Imf::Name, ChannelInfo* > chInfos; // this will hold pixel data and stride for each channel in input files
Imf::ChannelList channels = inHeader.channels();
Imf::ChannelList::ConstIterator itCh;
for( itCh = channels.begin(); itCh != channels.end(); itCh++ )
{
chInfos[itCh.name()] = new ChannelInfo( typeSize( itCh.channel().type), imageHeight, imageWidth );
outHeader.channels().insert( itCh.name(), Imf::Channel( itCh.channel().type));
if( Verbose) printf("Channel: '%s' | stride: %d\n", itCh.name(), typeSize( itCh.channel().type));
}
// Collect data from files
Imath::Box2i tileBox; // each tile's data window
Imath::Box2i resultBox; // resulting data window (should be sum of all tiles' data windows)
Imf::FrameBuffer fb;
for( int i = 0; i < numTiles; i++)
{
if( iFiles[i] == 0) // no file for this tile
continue;
tileBox = iFiles[i]->header().dataWindow();
resultBox.extendBy( tileBox );
if( Verbose) printf("Data win: xmin=%d xmax=%d ymin=%d ymax=%d\n", tileBox.min.x, tileBox.max.x, tileBox.min.y, tileBox.max.y);
channels = iFiles[i]->header().channels();
for( itCh = channels.begin(); itCh != channels.end(); itCh++ )
fb.insert( itCh.name(),
Imf::Slice( itCh.channel().type, // pixel type
(char*)&chInfos[itCh.name()]->array2d[0][0], // base
chInfos[itCh.name()]->stride, // x stride
chInfos[itCh.name()]->stride * imageWidth, // y stride
1, 1, 0.0 ) ); // x,y sampling, fill value
iFiles[i]->setFrameBuffer(fb);
iFiles[i]->readPixels( tileBox.min.y, tileBox.max.y);
}
// Write out everything:
outHeader.dataWindow() = resultBox;
Imf::OutputFile imageFile( baseName, outHeader );
imageFile.setFrameBuffer(fb);
imageFile.writePixels( resultBox.max.y-resultBox.min.y+1 );
printf("Joined EXR image successfully written.\n");
// Free files:
for( int i = 0; i < numTiles; i++)
if( iFiles[i] != 0 ) delete iFiles[i];
delete [] iFiles;
if( deleteTiles )
{
for( int i = 0; i < numTiles; i++)
if( unlink( tileNames[i]) != 0)
{
perror("Remove");
printf("Can't remove file '%s'\n", tileNames[i]);
}
}
}
// Free names:
for( int i = 0; i < numTiles; i++)
delete [] tileNames[i];
delete [] tileNames;
return exitCode;
}
void
OpenEXRInput::query_channels (void)
{
m_spec.nchannels = 0;
const Imf::ChannelList &channels (m_header->channels());
Imf::ChannelList::ConstIterator ci;
int c;
int red = -1, green = -1, blue = -1, alpha = -1, zee = -1;
for (c = 0, ci = channels.begin(); ci != channels.end(); ++c, ++ci) {
// std::cerr << "Channel " << ci.name() << '\n';
const char* name = ci.name();
m_channelnames.push_back (name);
if (red < 0 && (iequals(name, "R") || iequals(name, "Red") ||
iends_with(name,".R") || iends_with(name,".Red")))
red = c;
if (green < 0 && (iequals(name, "G") || iequals(name, "Green") ||
iends_with(name,".G") || iends_with(name,".Green")))
green = c;
if (blue < 0 && (iequals(name, "B") || iequals(name, "Blue") ||
iends_with(name,".B") || iends_with(name,".Blue")))
blue = c;
if (alpha < 0 && (iequals(name, "A") || iequals(name, "Alpha") ||
iends_with(name,".A") || iends_with(name,".Alpha")))
alpha = c;
if (zee < 0 && (iequals(name, "Z") || iequals(name, "Depth") ||
iends_with(name,".Z") || iends_with(name,".Depth")))
zee = c;
++m_spec.nchannels;
}
m_userchannels.resize (m_spec.nchannels);
int nc = 0;
if (red >= 0) {
m_spec.channelnames.push_back (m_channelnames[red]);
m_userchannels[red] = nc++;
}
if (green >= 0) {
m_spec.channelnames.push_back (m_channelnames[green]);
m_userchannels[green] = nc++;
}
if (blue >= 0) {
m_spec.channelnames.push_back (m_channelnames[blue]);
m_userchannels[blue] = nc++;
}
if (alpha >= 0) {
m_spec.channelnames.push_back (m_channelnames[alpha]);
m_spec.alpha_channel = nc;
m_userchannels[alpha] = nc++;
}
if (zee >= 0) {
m_spec.channelnames.push_back (m_channelnames[zee]);
m_spec.z_channel = nc;
m_userchannels[zee] = nc++;
}
for (c = 0, ci = channels.begin(); ci != channels.end(); ++c, ++ci) {
if (red == c || green == c || blue == c || alpha == c || zee == c)
continue; // Already accounted for this channel
m_userchannels[c] = nc;
m_spec.channelnames.push_back (ci.name());
++nc;
}
ASSERT ((int)m_spec.channelnames.size() == m_spec.nchannels);
// FIXME: should we also figure out the layers?
// Figure out data types -- choose the highest range
m_spec.format = TypeDesc::UNKNOWN;
std::vector<TypeDesc> chanformat;
bool differing_chanformats = false;
for (c = 0, ci = channels.begin(); ci != channels.end(); ++c, ++ci) {
Imf::PixelType ptype = ci.channel().type;
TypeDesc fmt = TypeDesc::HALF;
switch (ptype) {
case Imf::UINT :
fmt = TypeDesc::UINT;
if (m_spec.format == TypeDesc::UNKNOWN)
m_spec.format = TypeDesc::UINT;
break;
case Imf::HALF :
fmt = TypeDesc::HALF;
if (m_spec.format != TypeDesc::FLOAT)
m_spec.format = TypeDesc::HALF;
break;
case Imf::FLOAT :
fmt = TypeDesc::FLOAT;
m_spec.format = TypeDesc::FLOAT;
break;
default: ASSERT (0);
}
chanformat.push_back (fmt);
m_pixeltype.push_back (ptype);
if (fmt != chanformat[0])
differing_chanformats = true;
}
ASSERT (m_spec.format != TypeDesc::UNKNOWN);
if (differing_chanformats)
m_spec.channelformats = chanformat;
}
bool
OpenEXROutput::open (const std::string &name, const ImageSpec &userspec,
OpenMode mode)
{
if (mode == AppendSubimage) {
error ("%s does not support subimages", format_name());
return false;
}
if (mode == AppendMIPLevel && (m_output_scanline || m_output_tiled)) {
// Special case for appending to an open file -- we don't need
// to close and reopen
if (m_spec.tile_width && m_levelmode != Imf::ONE_LEVEL) {
// OpenEXR does not support differing tile sizes on different
// MIP-map levels. Reject the open() if not using the original
// tile sizes.
if (userspec.tile_width != m_spec.tile_width ||
userspec.tile_height != m_spec.tile_height) {
error ("OpenEXR tiles must have the same size on all MIPmap levels");
return false;
}
// Copy the new mip level size. Keep everything else from the
// original level.
m_spec.width = userspec.width;
m_spec.height = userspec.height;
// N.B. do we need to copy anything else from userspec?
++m_miplevel;
return true;
}
}
m_spec = userspec; // Stash the spec
if (m_spec.width < 1 || m_spec.height < 1) {
error ("Image resolution must be at least 1x1, you asked for %d x %d",
userspec.width, userspec.height);
return false;
}
if (m_spec.depth < 1)
m_spec.depth = 1;
if (m_spec.depth > 1) {
error ("%s does not support volume images (depth > 1)", format_name());
return false;
}
if (m_spec.full_width <= 0)
m_spec.full_width = m_spec.width;
if (m_spec.full_height <= 0)
m_spec.full_height = m_spec.height;
// Force use of one of the three data types that OpenEXR supports
switch (m_spec.format.basetype) {
case TypeDesc::UINT:
m_spec.format = TypeDesc::UINT;
break;
case TypeDesc::FLOAT:
case TypeDesc::DOUBLE:
m_spec.format = TypeDesc::FLOAT;
break;
default:
// Everything else defaults to half
m_spec.format = TypeDesc::HALF;
}
Imath::Box2i dataWindow (Imath::V2i (m_spec.x, m_spec.y),
Imath::V2i (m_spec.width + m_spec.x - 1,
m_spec.height + m_spec.y - 1));
Imath::Box2i displayWindow (Imath::V2i (m_spec.full_x, m_spec.full_y),
Imath::V2i (m_spec.full_width+m_spec.full_x-1,
m_spec.full_height+m_spec.full_y-1));
m_header = new Imf::Header (displayWindow, dataWindow);
// Insert channels into the header. Also give the channels names if
// the user botched it.
static const char *default_chan_names[] = { "R", "G", "B", "A" };
m_spec.channelnames.resize (m_spec.nchannels);
for (int c = 0; c < m_spec.nchannels; ++c) {
if (m_spec.channelnames[c].empty())
m_spec.channelnames[c] = (c<4) ? default_chan_names[c]
: Strutil::format ("unknown %d", c);
TypeDesc format = m_spec.channelformats.size() ?
m_spec.channelformats[c] : m_spec.format;
Imf::PixelType ptype;
switch (format.basetype) {
case TypeDesc::UINT:
ptype = Imf::UINT;
format = TypeDesc::UINT;
break;
case TypeDesc::FLOAT:
case TypeDesc::DOUBLE:
ptype = Imf::FLOAT;
format = TypeDesc::FLOAT;
break;
default:
// Everything else defaults to half
ptype = Imf::HALF;
format = TypeDesc::HALF;
}
#ifdef OPENEXR_VERSION_IS_1_6_OR_LATER
// Hint to lossy compression methods that indicates whether
// human perception of the quantity represented by this channel
// is closer to linear or closer to logarithmic. Compression
// methods may optimize image quality by adjusting pixel data
// quantization acording to this hint.
bool pLinear = iequals (m_spec.get_string_attribute ("oiio:ColorSpace", "Linear"), "Linear");
#endif
m_pixeltype.push_back (ptype);
if (m_spec.channelformats.size())
m_spec.channelformats[c] = format;
m_header->channels().insert (m_spec.channelnames[c].c_str(),
Imf::Channel(ptype, 1, 1
#ifdef OPENEXR_VERSION_IS_1_6_OR_LATER
, pLinear
#endif
));
}
ASSERT (m_pixeltype.size() == (size_t)m_spec.nchannels);
// Default to ZIP compression if no request came with the user spec.
if (! m_spec.find_attribute("compression"))
m_spec.attribute ("compression", "zip");
// Default to increasingY line order, same as EXR.
if (! m_spec.find_attribute("openexr:lineOrder"))
m_spec.attribute ("openexr:lineOrder", "increasingY");
// Automatically set date field if the client didn't supply it.
if (! m_spec.find_attribute("DateTime")) {
time_t now;
time (&now);
struct tm mytm;
Sysutil::get_local_time (&now, &mytm);
std::string date = Strutil::format ("%4d:%02d:%02d %2d:%02d:%02d",
mytm.tm_year+1900, mytm.tm_mon+1, mytm.tm_mday,
mytm.tm_hour, mytm.tm_min, mytm.tm_sec);
m_spec.attribute ("DateTime", date);
}
m_nsubimages = 1;
m_subimage = 0;
m_nmiplevels = 1;
m_miplevel = 0;
// Figure out if we are a mipmap or an environment map
ImageIOParameter *param = m_spec.find_attribute ("textureformat");
const char *textureformat = param ? *(char **)param->data() : NULL;
m_levelmode = Imf::ONE_LEVEL; // Default to no MIP-mapping
m_roundingmode = m_spec.get_int_attribute ("openexr:roundingmode",
Imf::ROUND_DOWN);
if (textureformat) {
if (iequals (textureformat, "Plain Texture")) {
m_levelmode = m_spec.get_int_attribute ("openexr:levelmode",
Imf::MIPMAP_LEVELS);
} else if (iequals (textureformat, "CubeFace Environment")) {
m_levelmode = m_spec.get_int_attribute ("openexr:levelmode",
Imf::MIPMAP_LEVELS);
m_header->insert ("envmap", Imf::EnvmapAttribute(Imf::ENVMAP_CUBE));
} else if (iequals (textureformat, "LatLong Environment")) {
m_levelmode = m_spec.get_int_attribute ("openexr:levelmode",
Imf::MIPMAP_LEVELS);
m_header->insert ("envmap", Imf::EnvmapAttribute(Imf::ENVMAP_LATLONG));
} else if (iequals (textureformat, "Shadow")) {
m_levelmode = Imf::ONE_LEVEL; // Force one level for shadow maps
}
if (m_levelmode == Imf::MIPMAP_LEVELS) {
// Compute how many mip levels there will be
int w = m_spec.width;
int h = m_spec.height;
while (w > 1 && h > 1) {
if (m_roundingmode == Imf::ROUND_DOWN) {
w = w / 2;
h = h / 2;
} else {
w = (w + 1) / 2;
h = (h + 1) / 2;
}
w = std::max (1, w);
h = std::max (1, h);
++m_nmiplevels;
}
}
}
// Deal with all other params
for (size_t p = 0; p < m_spec.extra_attribs.size(); ++p)
put_parameter (m_spec.extra_attribs[p].name().string(),
m_spec.extra_attribs[p].type(),
m_spec.extra_attribs[p].data());
try {
if (m_spec.tile_width) {
m_header->setTileDescription (
Imf::TileDescription (m_spec.tile_width, m_spec.tile_height,
Imf::LevelMode(m_levelmode),
Imf::LevelRoundingMode(m_roundingmode)));
m_output_tiled = new Imf::TiledOutputFile (name.c_str(), *m_header);
} else {
m_output_scanline = new Imf::OutputFile (name.c_str(), *m_header);
}
}
catch (const std::exception &e) {
error ("OpenEXR exception: %s", e.what());
m_output_scanline = NULL;
return false;
}
if (! m_output_scanline && ! m_output_tiled) {
error ("Unknown error opening EXR file");
return false;
}
return true;
}