openimageio_support.hh

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/* SPDX-FileCopyrightText: 2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#pragma once
 
#include <memory>
 
/* Include our own math header first to avoid warnings about M_PI
 * redefinition between OpenImageIO and Windows headers. */
#include "BLI_math_base.h"
#include "BLI_sys_types.h"
 
#include <OpenImageIO/filesystem.h>
#include <OpenImageIO/imageio.h>
 
#include "IMB_imbuf.hh"
#include "IMB_imbuf_types.hh"
 
namespace blender::imbuf {
 
struct ReadContext {
  const uchar *mem_start;
  const size_t mem_size;
  const char *file_format;
  const eImbFileType file_type;
  const int flags;
 
  int use_colorspace_role = -1;
 
  bool use_all_planes = false;
 
  bool use_embedded_colorspace = false;
};
 
struct WriteContext {
  const char *file_format;
  ImBuf *ibuf;
  int flags;
 
  uchar *mem_start;
  OIIO::stride_t mem_xstride;
  OIIO::stride_t mem_ystride;
  OIIO::ImageSpec mem_spec;
};
 
bool imb_oiio_check(const uchar *mem, size_t mem_size, const char *file_format);
 
ImBuf *imb_oiio_read(const ReadContext &ctx,
                     const OIIO::ImageSpec &config,
                     char colorspace[IM_MAX_SPACE],
                     OIIO::ImageSpec &r_newspec);
 
bool imb_oiio_write(const WriteContext &ctx,
                    const char *filepath,
                    const OIIO::ImageSpec &file_spec);
 
WriteContext imb_create_write_context(const char *file_format,
                                      ImBuf *ibuf,
                                      int flags,
                                      bool prefer_float = true);
 
OIIO::ImageSpec imb_create_write_spec(const WriteContext &ctx,
                                      int file_channels,
                                      OIIO::TypeDesc data_format);
 
}  // namespace blender::imbuf