format_bmp.cc

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/* SPDX-FileCopyrightText: 2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */
 
#include "oiio/openimageio_support.hh"
 
#include "IMB_filetype.hh"
#include "IMB_imbuf_types.hh"
 
OIIO_NAMESPACE_USING
using namespace blender::imbuf;
 
bool imb_is_a_bmp(const uchar *mem, size_t size)
{
  return imb_oiio_check(mem, size, "bmp");
}
 
ImBuf *imb_load_bmp(const uchar *mem, size_t size, int flags, char colorspace[IM_MAX_SPACE])
{
  ImageSpec config, spec;
 
  /* Keep historical behavior - do not use a 1-channel format for a black-white image. */
  config.attribute("bmp:monochrome_detect", 0);
 
  ReadContext ctx{mem, size, "bmp", IMB_FTYPE_BMP, flags};
  return imb_oiio_read(ctx, config, colorspace, spec);
}
 
bool imb_save_bmp(ImBuf *ibuf, const char *filepath, int flags)
{
  const int file_channels = ibuf->planes >> 3;
  const TypeDesc data_format = TypeDesc::UINT8;
 
  WriteContext ctx = imb_create_write_context("bmp", ibuf, flags, false);
  ImageSpec file_spec = imb_create_write_spec(ctx, file_channels, data_format);
 
  return imb_oiio_write(ctx, filepath, file_spec);
}