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imageio_exr.cc
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imageio_exr.cc
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/*
This file is part of darktable,
copyright (c) 2010--2014 Henrik Andersson.
darktable is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
darktable is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with darktable. If not, see <http://www.gnu.org/licenses/>.
*/
#define __STDC_FORMAT_MACROS
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <memory>
#include <stdio.h>
#include <inttypes.h>
#include <string.h>
#include <assert.h>
#include <OpenEXR/ImfFrameBuffer.h>
#include <OpenEXR/ImfTestFile.h>
#include <OpenEXR/ImfInputFile.h>
#include <OpenEXR/ImfTiledInputFile.h>
#include <OpenEXR/ImfChannelList.h>
#include <OpenEXR/ImfStandardAttributes.h>
extern "C"
{
#include "common/imageio_exr.h"
#include "common/imageio.h"
#include "common/darktable.h"
#include "develop/develop.h"
#include "common/exif.h"
#include "common/colorspaces.h"
#include "control/conf.h"
}
#include "common/imageio_exr.hh"
dt_imageio_retval_t dt_imageio_open_exr (dt_image_t *img, const char *filename, dt_mipmap_cache_allocator_t a)
{
bool isTiled=false;
#ifdef __APPLE__
std::auto_ptr<Imf::TiledInputFile> fileTiled;
std::auto_ptr<Imf::InputFile> file;
#else
std::unique_ptr<Imf::TiledInputFile> fileTiled;
std::unique_ptr<Imf::InputFile> file;
#endif
const Imf::Header *header=NULL;
Imath::Box2i dw;
Imf::FrameBuffer frameBuffer;
uint32_t xstride, ystride;
/* verify openexr image */
if(!Imf::isOpenExrFile ((const char *)filename,isTiled))
return DT_IMAGEIO_FILE_CORRUPTED;
/* open exr file */
try
{
if(isTiled)
{
#ifdef __APPLE__
std::auto_ptr<Imf::TiledInputFile> temp(new Imf::TiledInputFile(filename));
fileTiled = temp;
#else
std::unique_ptr<Imf::TiledInputFile> temp(new Imf::TiledInputFile(filename));
fileTiled = std::move(temp);
#endif
header = &(fileTiled->header());
}
else
{
#ifdef __APPLE__
std::auto_ptr<Imf::InputFile> temp(new Imf::InputFile(filename));
file = temp;
#else
std::unique_ptr<Imf::InputFile> temp(new Imf::InputFile(filename));
file = std::move(temp);
#endif
header = &(file->header());
}
}
catch (const std::exception &e)
{
return DT_IMAGEIO_FILE_CORRUPTED;
}
/* check that channels available is any of supported RGB(a) */
uint32_t cnt = 0;
for (Imf::ChannelList::ConstIterator i = header->channels().begin(); i != header->channels().end(); ++i)
{
cnt++;
if (i.name()[0] != 'R' && i.name()[0] != 'G' && i.name()[0] != 'B' && i.name()[0] != 'A')
{
fprintf(stderr,"[exr_read] Warning, only files with RGB(A) channels are supported.\n");
return DT_IMAGEIO_FILE_CORRUPTED;
}
}
/* we only support 3 and 4 channels */
if (cnt < 3 || cnt > 4)
{
fprintf(stderr,"[exr_read] Warning, only files with 3 or 4 channels are supported.\n");
return DT_IMAGEIO_FILE_CORRUPTED;
}
// read back exif data
const Imf::BlobAttribute *exif =
header->findTypedAttribute <Imf::BlobAttribute> ("exif");
// we append a jpg-compatible exif00 string, so get rid of that again:
if(exif && exif->value().size > 6)
dt_exif_read_from_blob(img, ((uint8_t*)(exif->value().data.get()))+6, exif->value().size-6);
/* Get image width and height from displayWindow */
dw = header->displayWindow();
img->width = dw.max.x - dw.min.x + 1;
img->height = dw.max.y - dw.min.y + 1;
// Try to allocate image data
img->bpp = 4*sizeof(float);
float *buf = (float *)dt_mipmap_cache_alloc(img, DT_MIPMAP_FULL, a);
if(!buf)
{
fprintf(stderr, "[exr_read] could not alloc full buffer for image `%s'\n", img->filename);
/// \todo open exr cleanup...
return DT_IMAGEIO_CACHE_FULL;
}
for (int i=0; i < img->width * img->height * 4; i++)
buf[i] = 0.0;
/* setup framebuffer */
xstride = sizeof(float) * 4;
ystride = sizeof(float) * img->width * 4;
frameBuffer.insert ("R", Imf::Slice(Imf::FLOAT, (char *)(buf+0), xstride, ystride, 1, 1, 0.0));
frameBuffer.insert ("G", Imf::Slice(Imf::FLOAT, (char *)(buf+1), xstride, ystride, 1, 1, 0.0));
frameBuffer.insert ("B", Imf::Slice(Imf::FLOAT, (char *)(buf+2), xstride, ystride, 1, 1, 0.0));
frameBuffer.insert ("A", Imf::Slice(Imf::FLOAT, (char *)(buf+3), xstride, ystride, 1, 1, 0.0));
if(isTiled)
{
fileTiled->setFrameBuffer (frameBuffer);
fileTiled->readTiles (0, fileTiled->numXTiles() - 1, 0, fileTiled->numYTiles() - 1);
}
else
{
/* read pixels from dataWindow */
dw = header->dataWindow();
file->setFrameBuffer (frameBuffer);
file->readPixels(dw.min.y,dw.max.y);
}
/* cleanup and return... */
img->flags |= DT_IMAGE_HDR;
return DT_IMAGEIO_OK;
}
// modelines: These editor modelines have been set for all relevant files by tools/update_modelines.sh
// vim: shiftwidth=2 expandtab tabstop=2 cindent
// kate: tab-indents: off; indent-width 2; replace-tabs on; indent-mode cstyle; remove-trailing-space on;