exr_io_common.h File Reference

IO functions and helpers for processing EXR files. More...

#include "Frame/frame_fwd.h"
#include "Common/ThirdParty/lib_openexr.h"
#include <array>
#include <string_view>
#include <string>
#include "DataIO/EXR/exr_io_common.ipp"

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Namespaces
namespace	ph
	The root for all renderer implementations.

Detailed Description

IO functions and helpers for processing EXR files.

Also contains helpers for using ILM's OpenEXR library for processing EXR files. The basic idea is that we provide pixel data in TFrame, then create Imf::Header and map frame data using Imf::FrameBuffer. Finally, pixel data is read/written to file using Imf::InputFile/Imf::OutputFile. If the element type in TFrame does not match the precision we requested, then a conversion will be done (converting to a suitable TFrame on the fly, which incurs additional memory allocation).

To simplify common usages, TFrame is assumed to contain the full data window. If a display-window only TFrame is desired, use adjust_frame_to_display_window().

Note that Imf::FrameBuffer and Imf::Slice do not own the specified data, they only reference it. The original pixel data (typically a TFrame here) must be kept alive during the output process.