Image
ParallelRenderer::render (World& _world, Settings& _settings, Engine&
_engine, SuperSampling& _super_sampling)
{
TaskDispatcher task_dispatcher(_settings);
std::vector<std::future<Tiles>> futures(0);
for (unsigned i = 0; i < _settings.max_thread_count; i++)
{
// TODO can this be done better? it must be possible
futures.push_back(std::async(std::launch::async, [this, &task_dispatcher,
&_world, &_settings, &_engine, &_super_sampling] () {
return worker(task_dispatcher, _world, _settings, _engine,
_super_sampling); }));
}
for (unsigned i = 0; i < futures.size(); i++)
{
futures[i].wait();
}
Image final_image(_settings.area.size);
for (unsigned i = 0; i < futures.size(); i++)
{
Tiles tiles = futures[i].get();
for (unsigned j = 0; j < tiles.size(); j++)
{
final_image.paste(tiles[j].task.start, tiles[j].image);
}
}
return final_image;
}
bool Frame::write_image(
const char* file_path,
const Image& image,
const ImageAttributes& image_attributes) const
{
assert(file_path);
Image final_image(image);
transform_to_output_color_space(final_image);
Stopwatch<DefaultWallclockTimer> stopwatch;
stopwatch.start();
try
{
try
{
GenericImageFileWriter writer;
writer.write(file_path, final_image, image_attributes);
}
catch (const ExceptionUnsupportedFileFormat&)
{
const string extension = lower_case(filesystem::path(file_path).extension());
RENDERER_LOG_ERROR(
"file format '%s' not supported, writing the image in OpenEXR format "
"(but keeping the filename unmodified).",
extension.c_str());
EXRImageFileWriter writer;
writer.write(file_path, final_image, image_attributes);
}
}
catch (const ExceptionIOError&)
{
RENDERER_LOG_ERROR(
"failed to write image file %s: i/o error.",
file_path);
return false;
}
catch (const Exception& e)
{
RENDERER_LOG_ERROR(
"failed to write image file %s: %s.",
file_path,
e.what());
return false;
}
stopwatch.measure();
RENDERER_LOG_INFO(
"wrote image file %s in %s.",
file_path,
pretty_time(stopwatch.get_seconds()).c_str());
return true;
}
ImageRAII appendimages( IplImage * image1, IplImage * image2 )
{
CvSize image1_size = cvGetSize( image1 );
CvSize image2_size = cvGetSize( image2 );
CvSize final_size = cvSize( image1_size.width + image2_size.width, std::max( image1_size.height, image2_size.height ) );
ImageRAII grayscale_image1( cvCreateImage( image1_size, image1->depth, 1 ) );
ImageRAII grayscale_image2( cvCreateImage( image2_size, image2->depth, 1 ) );
ImageRAII final_image( cvCreateImage( final_size, image1->depth, 1 ) );
// convert to grayscale
cvCvtColor( image1, grayscale_image1.image, CV_BGR2GRAY );
cvCvtColor( image2, grayscale_image2.image, CV_BGR2GRAY );
int width_adjust = 0;
// combine images side by side
for( int i = 0; i < image1_size.width; i++ )
{
for( int j = 0; j < image1_size.height; j++ )
{
*( final_image.image->imageData + j * final_image.image->widthStep + final_image.image->nChannels * ( i + width_adjust ) ) = *( grayscale_image1.image->imageData + j * grayscale_image1.image->widthStep + grayscale_image1.image->nChannels * i );
}
}
width_adjust = image1_size.width;
for( int i = 0; i < image2_size.width; i++ )
{
for( int j = 0; j < image2_size.height; j++ )
{
*( final_image.image->imageData + j * final_image.image->widthStep + final_image.image->nChannels * ( i + width_adjust ) ) = *( grayscale_image2.image->imageData + j * grayscale_image2.image->widthStep + grayscale_image2.image->nChannels * i );
}
}
return final_image;
}
void RenderingManager::print_average_luminance()
{
Image final_image(m_project->get_frame()->image());
m_project->get_frame()->transform_to_output_color_space(final_image);
const double average_luminance = compute_average_luminance(final_image);
RENDERER_LOG_DEBUG(
"final average luminance is %s.",
pretty_scalar(average_luminance, 6).c_str());
}