Sadly, that image has 1 byte (8 bits) of data per pixel.
2013/9/9 Brecht Van Lommel <[email protected]> > How many bits per pixel does this file have? If you have just 1 bit of > data per pixel and read it as an unsigned char, that will give you a > 80 GB buffer. If that's the case the workaround would be to read and > convert to 1 bit per pixel per scanline. > > On Mon, Sep 9, 2013 at 5:16 PM, Ramiro Pereira de Magalhães > <[email protected]> wrote: > > Hi, > > > > I have just learned about OIIO and I wrote a simple program with > OpenImageIO > > to load a 10GB PGM file into memory. To try things out I wrote a simple > > program to load a 10GB PGM (yeah, PGM) file into memory. Sadly, the > program > > crashes prior to completing its task with a Segmentation Fault. The > machine > > where this is running has 64GB RAM, most of it free. Can anyone help me > > figure out this issue? > > > > Bellow is the program I wrote. It is pretty simple: load the image given > as > > argument to it into a buffer, then close the file, clean the buffers and > > leave. > > > > ================CODE================ > > #include <iostream> > > #include <string> > > #include <sstream> > > #include <OpenImageIO/imageio.h> > > > > OIIO_NAMESPACE_USING > > > > int main(int argc, char* args[]) > > { > > if (argc != 2) > > { > > return 1; > > } > > const std::string filePath = args[1]; > > > > ImageInput *in = ImageInput::open (filePath); > > const ImageSpec & spec = in->spec(); > > const int size = spec.width * spec.height; > > > > unsigned char * pixels = new unsigned char[size]; > > in->read_image(TypeDesc::UCHAR, pixels); > > std::cout << "Done reading." << std::endl; > > in->close(); > > std::cout << "Closed file." << std::endl; > > > > delete in; > > delete pixels; > > > > std::cout << "Outta here." << std::endl; > > return 0; > > } > > ================CODE================ > > > > > > Segfault happens at line 173 of onminput.cpp. Here is the call stack > given > > by Qt Builder: > > > > 0 OpenImageIO::v1_3::raw_to_raw<unsigned char> pnminput.cpp 173 > > 0x7ffff798c1e6 > > 1 OpenImageIO::v1_3::PNMInput::read_file_scanline pnminput.cpp > 272 > > 0x7ffff798b09c > > 2 OpenImageIO::v1_3::PNMInput::read_native_scanline pnminput.cpp > > 385 0x7ffff798b91e > > 3 OpenImageIO::v1_3::ImageInput::read_native_scanlines > imageinput.cpp > > 260 0x7ffff76d9280 > > 4 OpenImageIO::v1_3::ImageInput::read_scanlines imageinput.cpp > 197 > > 0x7ffff76d8c24 > > 5 OpenImageIO::v1_3::ImageInput::read_scanlines imageinput.cpp > 165 > > 0x7ffff76d8977 > > 6 OpenImageIO::v1_3::ImageInput::read_image imageinput.cpp 631 > > 0x7ffff76db3c8 > > 7 main show.cpp 31 0x4012b7 > > > > > > I compiled OIIO from the git commit > d64b9ac8a63261040ae0263b0709924d8fecf4df > > (Tue Sep 3 12:53:12 2013 -0700). > > > > I appreciate any help. > > > > _______________________________________________ > > Oiio-dev mailing list > > [email protected] > > http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org > > > _______________________________________________ > Oiio-dev mailing list > [email protected] > http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org >
_______________________________________________ Oiio-dev mailing list [email protected] http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org
