e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
84 lines
2.2 KiB
C++
84 lines
2.2 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
|
|
/** \file
|
|
* \ingroup imbuf
|
|
*/
|
|
|
|
#include "oiio/openimageio_support.hh"
|
|
|
|
#include "IMB_colormanagement.h"
|
|
#include "IMB_filetype.h"
|
|
#include "IMB_imbuf_types.h"
|
|
|
|
OIIO_NAMESPACE_USING
|
|
using namespace blender::imbuf;
|
|
|
|
extern "C" {
|
|
|
|
bool imb_is_a_tiff(const uchar *mem, size_t size)
|
|
{
|
|
constexpr int MAGIC_SIZE = 4;
|
|
if (size < MAGIC_SIZE) {
|
|
return false;
|
|
}
|
|
|
|
const char big_endian[MAGIC_SIZE] = {0x4d, 0x4d, 0x00, 0x2a};
|
|
const char lil_endian[MAGIC_SIZE] = {0x49, 0x49, 0x2a, 0x00};
|
|
return ((memcmp(big_endian, mem, MAGIC_SIZE) == 0) ||
|
|
(memcmp(lil_endian, mem, MAGIC_SIZE) == 0));
|
|
}
|
|
|
|
ImBuf *imb_load_tiff(const uchar *mem, size_t size, int flags, char colorspace[IM_MAX_SPACE])
|
|
{
|
|
ImageSpec config, spec;
|
|
config.attribute("oiio:UnassociatedAlpha", 1);
|
|
|
|
ReadContext ctx{mem, size, "tif", IMB_FTYPE_TIF, flags};
|
|
|
|
/* All TIFFs should be in default byte colorspace. */
|
|
ctx.use_colorspace_role = COLOR_ROLE_DEFAULT_BYTE;
|
|
|
|
ImBuf *ibuf = imb_oiio_read(ctx, config, colorspace, spec);
|
|
if (ibuf) {
|
|
if (flags & IB_alphamode_detect) {
|
|
if (spec.nchannels == 4 && spec.format == TypeDesc::UINT16) {
|
|
ibuf->flags |= IB_alphamode_premul;
|
|
}
|
|
}
|
|
}
|
|
|
|
return ibuf;
|
|
}
|
|
|
|
bool imb_save_tiff(ImBuf *ibuf, const char *filepath, int flags)
|
|
{
|
|
const bool is_16bit = ((ibuf->foptions.flag & TIF_16BIT) && ibuf->float_buffer.data);
|
|
const int file_channels = ibuf->planes >> 3;
|
|
const TypeDesc data_format = is_16bit ? TypeDesc::UINT16 : TypeDesc::UINT8;
|
|
|
|
WriteContext ctx = imb_create_write_context("tif", ibuf, flags, is_16bit);
|
|
ImageSpec file_spec = imb_create_write_spec(ctx, file_channels, data_format);
|
|
|
|
if (is_16bit && file_channels == 4) {
|
|
file_spec.attribute("oiio:UnassociatedAlpha", 0);
|
|
}
|
|
else {
|
|
file_spec.attribute("oiio:UnassociatedAlpha", 1);
|
|
}
|
|
|
|
if (ibuf->foptions.flag & TIF_COMPRESS_DEFLATE) {
|
|
file_spec.attribute("compression", "zip");
|
|
}
|
|
else if (ibuf->foptions.flag & TIF_COMPRESS_LZW) {
|
|
file_spec.attribute("compression", "lzw");
|
|
}
|
|
else if (ibuf->foptions.flag & TIF_COMPRESS_PACKBITS) {
|
|
file_spec.attribute("compression", "packbits");
|
|
}
|
|
|
|
return imb_oiio_write(ctx, filepath, file_spec);
|
|
}
|
|
}
|