C++ imath::Box2i类代码示例

DataPtr JPEGImageReader::readTypedChannel( const std::string &name, const Imath::Box2i &dataWindow, int channelOffset )
{
	int area = ( dataWindow.size().x + 1 ) * ( dataWindow.size().y + 1 );
	assert( area >= 0 );
	int dataWidth = 1 + dataWindow.size().x;
	int dataY = 0;

	typedef TypedData< std::vector< V > > TargetVector;
	
	typename TargetVector::Ptr dataContainer = new TargetVector();
	typename TargetVector::ValueType &data = dataContainer->writable();
	data.resize( area );

	ScaledDataConversion< unsigned char, V> converter;

	for ( int y = dataWindow.min.y; y <= dataWindow.max.y; ++y, ++dataY )
	{
		typename TargetVector::ValueType::size_type dataOffset = dataY * dataWidth;
		for ( int x = dataWindow.min.x; x <= dataWindow.max.x; ++x, ++dataOffset )
		{
			assert( dataOffset < data.size() );
			data[dataOffset] = converter( m_buffer[ m_numChannels * ( y * m_bufferWidth + x ) + channelOffset ] );
		}
	}
	return dataContainer;
}

void exposure_node_t::do_process( const image::const_image_view_t& src, const image::image_view_t& dst, const render::render_context_t& context)
{
    image::const_image_view_t src_view;
    image::image_view_t dst_view;
    Imath::Box2i area;

    if( input(1))
    {
	boost::gil::copy_pixels( src, dst);
	area = intersect( input(1)->defined(), defined());

	if( area.isEmpty())
	    return;

	src_view = input(0)->const_subimage_view( area);
	dst_view = subimage_view( area);
    }
    else
    {
	src_view = src;
	dst_view = dst;
    }

    boost::gil::tbb_transform_pixels( src_view, dst_view, exposure_fun( get_value<float>( param( "exp"))));

    if( input(1))
        image::key_mix( src_view, dst_view, boost::gil::nth_channel_view( input(1)->const_subimage_view( area), 3), dst_view);
}

void layer_node_t::do_calc_bounds( const render::context_t& context)
{
    Imath::Box2i bbox;

    float opacity = get_value<float>( param( "opacity"));

    if( opacity == 1.0f)
    {
        switch( get_value<int>( param( "layer_mode")))
        {
        case comp_mult:
        case comp_min:
        case comp_mix:
            bbox = ImathExt::intersect( input_as<image_node_t>( 0)->bounds(), input_as<image_node_t>( 1)->bounds());
        break;

        case comp_sub:
            bbox = input_as<image_node_t>( 0)->bounds();
        break;

        default:
            bbox = input_as<image_node_t>( 0)->bounds();
            bbox.extendBy( input_as<image_node_t>( 1)->bounds());
        }
    }
    else
    {
        bbox = input_as<image_node_t>( 0)->bounds();
        bbox.extendBy( input_as<image_node_t>( 1)->bounds());
    }

    set_bounds( bbox);
}

void expand_node_t::do_process( const render::context_t& context)
{
    Imath::Box2i area = ImathExt::intersect( input_as<image_node_t>()->defined(), defined());

    if( area.isEmpty())
        return;

    boost::gil::copy_pixels( input_as<image_node_t>()->const_subimage_view( area), subimage_view( area));
}

void crop_node_t::do_process( const render::render_context_t& context)
{
    Imath::Box2i area = intersect( input()->defined(), defined());

    if( area.isEmpty())
	return;

    boost::gil::copy_pixels( input()->const_subimage_view( area), subimage_view( area));
}

Imath::Box2i CopyChannels::computeDataWindow( const Gaffer::Context *context, const ImagePlug *parent ) const
{
	Imath::Box2i dataWindow;
	for( ImagePlugIterator it( inPlugs() ); !it.done(); ++it )
	{
		dataWindow.extendBy( (*it)->dataWindowPlug()->getValue() );
	}

	return dataWindow;
}

Imath::Box2i Merge::computeDataWindow( const Gaffer::Context *context, const ImagePlug *parent ) const
{
	Imath::Box2i dataWindow;
	for( ImagePlugIterator it( inPlugs() ); !it.done(); ++it )
	{
		// We don't need to check that the plug is connected here as unconnected plugs don't have data windows.
		dataWindow.extendBy( (*it)->dataWindowPlug()->getValue() );
	}

	return dataWindow;
}

void ImageStats::compute( ValuePlug *output, const Context *context ) const
{
	const int colorIndex = ::colorIndex( output );
	if( colorIndex == -1 )
	{
		// Not a plug we know about
		ComputeNode::compute( output, context );
		return;
	}

	const std::string channelName = this->channelName( colorIndex );
	const Imath::Box2i area = areaPlug()->getValue();

	if( channelName.empty() || BufferAlgo::empty( area ) )
	{
		output->setToDefault();
		return;
	}

	// Loop over the ROI and compute the min, max and average channel values and then set our outputs.
	Sampler s( inPlug(), channelName, area );

	float min = Imath::limits<float>::max();
	float max = Imath::limits<float>::min();
	double sum = 0.;

	for( int y = area.min.y; y < area.max.y; ++y )
	{
		for( int x = area.min.x; x < area.max.x; ++x )
		{
			float v = s.sample( x, y );
			min = std::min( v, min );
			max = std::max( v, max );
			sum += v;
		}
	}

	if( output->parent<Plug>() == minPlug() )
	{
		static_cast<FloatPlug *>( output )->setValue( min );
	}
	else if( output->parent<Plug>() == maxPlug() )
	{
		static_cast<FloatPlug *>( output )->setValue( max );
	}
	else if( output->parent<Plug>() == averagePlug() )
	{
		static_cast<FloatPlug *>( output )->setValue(
			sum / double( (area.size().x) * (area.size().y) )
		);
	}
}

void make_color_bars( const image_view_t& view, const Imath::Box2i& domain, const Imath::Box2i& defined)
{
    typedef detail::color_bars_fn deref_t;
    typedef deref_t::point_t point_t;
    typedef boost::gil::virtual_2d_locator<deref_t,false> locator_t;
    typedef boost::gil::image_view<locator_t> my_virt_view_t;

    point_t dims( domain.size().x+1, domain.size().y+1);
    my_virt_view_t bars( dims, locator_t( point_t(0,0), point_t(1,1), deref_t( dims)));

    boost::gil::copy_pixels( boost::gil::subimage_view( bars, defined.min.x - domain.min.x,
								defined.min.y - domain.min.y,
								defined.size().x+1, defined.size().y+1), view);
}

image_t *clip_t::get_output_image( OfxTime time, OfxRectD *optionalBounds)
{
    RAMEN_ASSERT( node());
    RAMEN_ASSERT( node()->composition());
    RAMEN_ASSERT( !node()->image_empty());
    RAMEN_ASSERT( time == node()->composition()->frame());
    RAMEN_ASSERT( getComponents() == kOfxImageComponentRGBA);
    RAMEN_ASSERT( getPixelDepth() == kOfxBitDepthFloat);

    Imath::Box2i area;

    if( optionalBounds)
    {
        area = Imath::Box2i( Imath::V2i( optionalBounds->x1, optionalBounds->y1), Imath::V2i( optionalBounds->x2 - 1, optionalBounds->y2 - 1));
        area = Imath::scale( area, 1.0f / node()->render_context().subsample);
        area = node()->vertical_flip( area);
    }
    else
        area = node()->defined();

    if( area.isEmpty())
    {
#ifndef NDEBUG
        DLOG( INFO) << "clip_t::getOutputImage, node = " << node()->name() << ", area == empty";
#endif

        return 0;
    }

    image::const_image_view_t view( node()->const_subimage_view( area));

    int rowbytes;
    void *ptr = view_get_ptr_and_stride( view, rowbytes);

    // convert to OFX coordinate sys
    area = node()->vertical_flip( area);

    OfxRectI bounds;
    bounds.x1 = area.min.x;
    bounds.y1 = area.min.y;
    bounds.x2 = area.max.x + 1;
    bounds.y2 = area.max.y + 1;

#ifndef NDEBUG
    DLOG( INFO) << "clip_t::getOutputImage, node = " << node()->name();
#endif

    return new image_t( *this, node()->image(), 1.0 / node()->render_context().subsample, ptr, bounds, bounds, rowbytes, std::string( ""));
}

Imath::M33f Transform2DPlug::matrix( const Imath::Box2i &displayWindow, double pixelAspect ) const
{
	// We need to transform from image space (with 0x0 being the bottom left)
	// to Gadget space (where 0x0 is the top left). To do this, we need to know the
	// size of the Format.
	
	///\todo: We don't handle the pixel aspect of the format here but we should!
	float formatHeight = displayWindow.size().y + 1;
	
	M33f p;
	V2f pivotVec = pivotPlug()->getValue();
	pivotVec.y = formatHeight - pivotVec.y;
	p.translate( pivotVec );
	
	M33f t;
	V2f translateVec = translatePlug()->getValue();
	translateVec.y *= -1.;
	t.translate( translateVec );
	
	M33f r;
	r.rotate( IECore::degreesToRadians( rotatePlug()->getValue() ) );
	M33f s;
	s.scale( scalePlug()->getValue() );
	
	M33f pi;
	pi.translate( pivotVec*Imath::V2f(-1.f) );
	M33f result = pi * s * r * t * p;

	return result;
}

TiledRgbaOutputFile::TiledRgbaOutputFile
    (const char name[],
     int tileXSize,
     int tileYSize,
     LevelMode mode,
     LevelRoundingMode rmode,
     const Imath::Box2i &displayWindow,
     const Imath::Box2i &dataWindow,
     RgbaChannels rgbaChannels,
     float pixelAspectRatio,
     const Imath::V2f screenWindowCenter,
     float screenWindowWidth,
     LineOrder lineOrder,
     Compression compression,
     int numThreads)
:
    _outputFile (0),
    _toYa (0)
{
    Header hd (displayWindow,
	       dataWindow.isEmpty()? displayWindow: dataWindow,
	       pixelAspectRatio,
	       screenWindowCenter,
	       screenWindowWidth,
	       lineOrder,
	       compression);

    insertChannels (hd, rgbaChannels, name);
    hd.setTileDescription (TileDescription (tileXSize, tileYSize, mode, rmode));
    _outputFile = new TiledOutputFile (name, hd, numThreads);

    if (rgbaChannels & WRITE_Y)
	_toYa = new ToYa (*_outputFile, rgbaChannels);
}

void image_node_renderer_t::render( const Imath::Box2i& roi)
{
	RAMEN_ASSERT( has_context_);
	RAMEN_ASSERT( !roi.isEmpty());

    n_->set_interest( roi);
    breadth_first_inputs_apply( *n_, boost::bind( &image_node_t::calc_inputs_interest_fun, _1, new_context_));
    depth_first_inputs_search(  *n_, boost::bind( &image_node_t::calc_defined_fun, _1, new_context_));
    depth_first_inputs_search(  *n_, boost::bind( &image_node_t::subsample_areas_fun, _1, new_context_));

    if( do_log)
        depth_first_inputs_search( *n_, test_empty_images());

    depth_first_inputs_search( *n_, boost::bind( &node_t::clear_hash, _1));
    depth_first_inputs_search( *n_, boost::bind( &node_t::calc_hash_str, _1, new_context_));

    if( do_log)
        depth_first_inputs_search( *n_, print_areas());

	try
	{
	    n_->recursive_process( new_context_);
		render_done_ = true;
	}
	catch( std::bad_alloc&)
	{
		throw boost::enable_error_info( std::bad_alloc());
	}
}

RgbaOutputFile::RgbaOutputFile (const char name[],
				const Imath::Box2i &displayWindow,
				const Imath::Box2i &dataWindow,
				RgbaChannels rgbaChannels,
				float pixelAspectRatio,
				const Imath::V2f screenWindowCenter,
				float screenWindowWidth,
				LineOrder lineOrder,
				Compression compression):
    _outputFile (0)
{
    Header hd (displayWindow,
	       dataWindow.isEmpty()? displayWindow: dataWindow,
	       pixelAspectRatio,
	       screenWindowCenter,
	       screenWindowWidth,
	       lineOrder,
	       compression);

    ChannelList ch;

    if (rgbaChannels & WRITE_R)
	ch.insert ("R", Channel (HALF, 1, 1));
    if (rgbaChannels & WRITE_G)
	ch.insert ("G", Channel (HALF, 1, 1));
    if (rgbaChannels & WRITE_B)
	ch.insert ("B", Channel (HALF, 1, 1));
    if (rgbaChannels & WRITE_A)
	ch.insert ("A", Channel (HALF, 1, 1));

    hd.channels() = ch;
    _outputFile = new OutputFile (name, hd);
}

AcesOutputFile::AcesOutputFile
    (const std::string &name,
     const Imath::Box2i &displayWindow,
     const Imath::Box2i &dataWindow,
     RgbaChannels rgbaChannels,
     float pixelAspectRatio,
     const Imath::V2f screenWindowCenter,
     float screenWindowWidth,
     LineOrder lineOrder,
     Compression compression,
     int numThreads)
:
    _data (new Data)
{
    checkCompression (compression);

    Header newHeader (displayWindow,
		      dataWindow.isEmpty()? displayWindow: dataWindow,
		      pixelAspectRatio,
		      screenWindowCenter,
		      screenWindowWidth,
		      lineOrder,
		      compression);

    addChromaticities (newHeader, acesChromaticities());
    addAdoptedNeutral (newHeader, acesChromaticities().white);

    _data->rgbaFile = new RgbaOutputFile (name.c_str(),
					  newHeader,
					  rgbaChannels,
					  numThreads);

    _data->rgbaFile->setYCRounding (7, 6);
}