Example #1
0
void Generate(int cubesize, int maxwidth,
              const std::string & outputfile,
              const std::string & configfile,
              const std::string & incolorspace,
              const std::string & outcolorspace)
{
    int width = 0;
    int height = 0;
    int numchannels = 3;
    GetLutImageSize(width, height, cubesize, maxwidth);
    
    std::vector<float> img;
    img.resize(width*height*numchannels, 0);
    
    GenerateIdentityLut3D(&img[0], cubesize, numchannels, LUT3DORDER_FAST_RED);
    
    if(!incolorspace.empty() || !outcolorspace.empty())
    {
        OCIO::ConstConfigRcPtr config = OCIO::Config::Create();
        if(!configfile.empty())
        {
            config = OCIO::Config::CreateFromFile(configfile.c_str());
        }
        else if(getenv("OCIO"))
        {
            config = OCIO::Config::CreateFromEnv();
        }
        else
        {
            std::ostringstream os;
            os << "You must specify an ocio configuration ";
            os << "(either with --config or $OCIO).";
            throw Exception(os.str().c_str());
        }
        
        OCIO::ConstProcessorRcPtr processor = 
            config->getProcessor(incolorspace.c_str(), outcolorspace.c_str());
       
        OCIO::PackedImageDesc imgdesc(&img[0], width, height, 3);
        processor->apply(imgdesc);
    }

    OIIO::ImageOutput* f = OIIO::ImageOutput::create(outputfile);
    if(!f)
    {
        throw Exception( "Could not create output image.");
    }
    
    OIIO::ImageSpec spec(width, height, numchannels, OIIO::TypeDesc::TypeFloat);
    
    // TODO: If DPX, force 16-bit output?
    f->open(outputfile, spec);
    f->write_image(OIIO::TypeDesc::FLOAT, &img[0]);
    f->close();
    delete f;
}
Example #2
0
int main(int argc, char **argv)
{
    if(argc<5)
    {
        std::cerr << USAGE_TEXT << std::endl;
        exit(0);
    }

    const char * inputimage = argv[1];
    const char * inputcolorspace = argv[2];
    const char * outputimage = argv[3];
    const char * outputcolorspace = argv[4];

    OIIO::ImageSpec spec;
    std::vector<float> img;
    int imgwidth = 0;
    int imgheight = 0;
    int components = 0;

    // Load the image
    std::cerr << "Loading " << inputimage << std::endl;
    try
    {
        OIIO::ImageInput* f = OIIO::ImageInput::create(inputimage);
        if(!f)
        {
            std::cerr << "Could not create image input." << std::endl;
            exit(1);
        }

        f->open(inputimage, spec);

        std::string error = f->geterror();
        if(!error.empty())
        {
            std::cerr << "Error loading image " << error << std::endl;
            exit(1);
        }

        imgwidth = spec.width;
        imgheight = spec.height;
        components = spec.nchannels;

        img.resize(imgwidth*imgheight*components);
        memset(&img[0], 0, imgwidth*imgheight*components*sizeof(float));

        f->read_image(OIIO::TypeDesc::TypeFloat, &img[0]);
        delete f;

    }
    catch(...)
    {
        std::cerr << "Error loading file.";
        exit(1);
    }

    // Process the image
    try
    {
        // Load the current config.
        OCIO::ConstConfigRcPtr config = OCIO::GetCurrentConfig();

        // Get the processor
        OCIO::ConstProcessorRcPtr processor = config->getProcessor(inputcolorspace, outputcolorspace);

        // Wrap the image in a light-weight ImageDescription
        OCIO::PackedImageDesc imageDesc(&img[0], imgwidth, imgheight, components);

        // Apply the color transformation (in place)
        processor->apply(imageDesc);
    }
    catch(OCIO::Exception & exception)
    {
        std::cerr << "OCIO Error: " << exception.what() << std::endl;
    }
    catch(...)
    {
        std::cerr << "Unknown OCIO error encountered." << std::endl;
    }

    // Write out the result
    try
    {
        OIIO::ImageOutput* f = OIIO::ImageOutput::create(outputimage);
        if(!f)
        {
            std::cerr << "Could not create output input." << std::endl;
            exit(1);
        }

        f->open(outputimage, spec);
        f->write_image(OIIO::TypeDesc::FLOAT, &img[0]);
        f->close();
        delete f;
    }
    catch(...)
    {
        std::cerr << "Error loading file.";
        exit(1);
    }

    std::cerr << "Wrote " << outputimage << std::endl;

    return 0;
}