#ifndef K3DSDK_BITMAP_MODIFIER_H
#define K3DSDK_BITMAP_MODIFIER_H

// K-3D
// Copyright (c) 1995-2006, Timothy M. Shead
//
// Contact: tshead@k-3d.com
//
// This program 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 2 of the License, or (at your option) any later version.
//
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#include <k3dsdk/bitmap.h>
#include <k3dsdk/data.h>
#include <k3dsdk/hints.h>
#include <k3dsdk/ibitmap_sink.h>
#include <k3dsdk/ibitmap_source.h>
#include <k3dsdk/ipipeline_profiler.h>
#include <k3d-i18n-config.h>
#include <k3dsdk/pointer_demand_storage.h>

namespace k3d
{

template<typename derived_t>
class bitmap_modifier :
	public ibitmap_source,
	public ibitmap_sink
{
public:
	iproperty& bitmap_source_output()
	{
		return m_output_bitmap;
	}

	iproperty& bitmap_sink_input()
	{
		return m_input_bitmap;
	}

	sigc::slot<void, ihint*> make_update_bitmap_slot()
	{
		return m_output_bitmap.make_slot();
	}

protected:
	bitmap_modifier() :
		m_input_bitmap(
			init_owner(owner())
			+ init_name("input_bitmap")
			+ init_label(_("Input Bitmap"))
			+ init_description(_("Input bitmap"))
			+ init_value<bitmap*>(0)),
		m_output_bitmap(
			init_owner(owner())
			+ init_name("output_bitmap")
			+ init_label(_("Output Bitmap"))
			+ init_description(_("Output bitmap")))
	{
		m_output_bitmap.set_update_slot(sigc::mem_fun(*this, &bitmap_modifier<derived_t>::execute));

		m_input_bitmap.changed_signal().connect(hint::converter<
			hint::convert<hint::bitmap_dimensions_changed, hint::unchanged,
			hint::convert<hint::bitmap_pixels_changed, hint::unchanged,
			hint::convert<hint::any, hint::none> > > >(m_output_bitmap.make_slot()));
	}

	k3d_data(bitmap*, immutable_name, change_signal, no_undo, local_storage, no_constraint, read_only_property, no_serialization) m_input_bitmap;
	k3d_data(bitmap*, immutable_name, change_signal, no_undo, pointer_demand_storage, no_constraint, read_only_property, no_serialization) m_output_bitmap;

private:
	inline derived_t& owner()
	{
		return *static_cast<derived_t*>(this);
	}

	void execute(const std::vector<ihint*>& Hints, bitmap& Bitmap)
	{
		if(const bitmap* const input = m_input_bitmap.pipeline_value())
		{
			bool resize_bitmap = false;
			bool assign_pixels = false;

			for(int i = 0; i != Hints.size(); ++i)
			{
				// Input pixels changed, so all we have to do is reassign ours ...
				if(dynamic_cast<hint::bitmap_pixels_changed*>(Hints[i]))
				{
					assign_pixels = true;
				}
				// In every other case (bitmap_dimensions_changed, unknown hint, or no hint),
				// we must assume the worst and recreate everything from scratch ...
				else
				{
					resize_bitmap = true;
					assign_pixels = true;
					break;
				}
			}

			if(resize_bitmap)
			{
				owner().document().pipeline_profiler().start_execution(owner(), "Resize Bitmap");
				on_resize_bitmap(*input, Bitmap);
				owner().document().pipeline_profiler().finish_execution(owner(), "Resize Bitmap");
			}

			if(assign_pixels)
			{
				owner().document().pipeline_profiler().start_execution(owner(), "Assign Pixels");
				on_assign_pixels(*input, Bitmap);
				owner().document().pipeline_profiler().finish_execution(owner(), "Assign Pixels");
			}
		}
	}

	virtual void on_resize_bitmap(const bitmap& Input, bitmap& Output) = 0;
	virtual void on_assign_pixels(const bitmap& Input, bitmap& Output) = 0;
};

} // namespace k3d

#endif // !K3DSDK_BITMAP_MODIFIER_H

