obs-StreamFX/source/filter-shadow-sdf.hpp

/*
 * Modern effects for a modern Streamer
 * Copyright (C) 2017-2018 Michael Fabian Dirks
 *
 * 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#ifndef OBS_STREAM_EFFECTS_FILTER_SHADOW_SDF_HPP
#define OBS_STREAM_EFFECTS_FILTER_SHADOW_SDF_HPP
#pragma once

#include <memory>
#include "gs-effect.hpp"
#include "gs-rendertarget.hpp"
#include "gs-sampler.hpp"
#include "gs-texture.hpp"
#include "gs-vertexbuffer.hpp"
#include "plugin.hpp"

// OBS
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4201)
#endif
#include <obs.h>
#ifdef _MSC_VER
#pragma warning(pop)
#endif

namespace filter {
	class shadow_sdf {
		obs_source_t* m_self;

		// Input
		std::shared_ptr<gs::rendertarget> m_source_rt;
		std::shared_ptr<gs::texture>      m_source_texture;
		bool                              m_source_rendered;

		// Distance Field
		std::shared_ptr<gs::rendertarget> m_sdf_write, m_sdf_read;
		std::shared_ptr<gs::texture>      m_sdf_texture;

		float_t m_tick = 0.;

		bool     m_inner_shadow;
		float_t  m_inner_range_min;
		float_t  m_inner_range_max;
		float_t  m_inner_offset_x;
		float_t  m_inner_offset_y;
		uint32_t m_inner_color;
		bool     m_outer_shadow;
		float_t  m_outer_range_min;
		float_t  m_outer_range_max;
		float_t  m_outer_offset_x;
		float_t  m_outer_offset_y;
		uint32_t m_outer_color;

		static bool cb_modified_inside(void* ptr, obs_properties_t* props, obs_property* prop, obs_data_t* settings);

		static bool cb_modified_outside(void* ptr, obs_properties_t* props, obs_property* prop, obs_data_t* settings);

		public:
		shadow_sdf(obs_data_t* settings, obs_source_t* self);
		~shadow_sdf();

		obs_properties_t* get_properties();
		void              update(obs_data_t*);

		uint32_t get_width();
		uint32_t get_height();

		void activate();
		void deactivate();

		void video_tick(float);
		void video_render(gs_effect_t*);
	};

	class shadow_sdf_factory {
		obs_source_info                 source_info;
		std::list<shadow_sdf*> sources;

		std::shared_ptr<gs::effect> sdf_generator_effect;
		std::shared_ptr<gs::effect> sdf_shadow_effect;

		private:
		shadow_sdf_factory();
		~shadow_sdf_factory();

		void on_list_fill();
		void on_list_empty();

		protected:
		static void* create(obs_data_t* settings, obs_source_t* self);
		static void  destroy(void* source);

		static void              get_defaults(obs_data_t* settings);
		static obs_properties_t* get_properties(void* source);
		static void              update(void* source, obs_data_t* settings);

		static const char* get_name(void* source);
		static uint32_t    get_width(void* source);
		static uint32_t    get_height(void* source);

		static void activate(void* source);
		static void deactivate(void* source);

		static void video_tick(void* source, float delta);
		static void video_render(void* source, gs_effect_t* effect);

		public:
		std::shared_ptr<gs::effect> get_sdf_generator_effect();
		std::shared_ptr<gs::effect> get_sdf_shadow_effect();

		public: // Singleton
		static void                initialize();
		static void                finalize();
		static shadow_sdf_factory* get();
	};
} // namespace filter

#endif