librocketrenderinterface.h

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/***************************************************************************
 *   Copyright (C) 2005-2019 by the FIFE team                              *
 *   http://www.fifengine.net                                              *
 *   This file is part of FIFE.                                            *
 *                                                                         *
 *   FIFE is free software; you can redistribute it and/or                 *
 *   modify it under the terms of the GNU Lesser General Public            *
 *   License as published by the Free Software Foundation; either          *
 *   version 2.1 of the License, or (at your option) any later version.    *
 *                                                                         *
 *   This library 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     *
 *   Lesser General Public License for more details.                       *
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 *   You should have received a copy of the GNU Lesser General Public      *
 *   License along with this library; if not, write to the                 *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
 ***************************************************************************/

#ifndef FIFE_GUI_LIBROCKETRENDERINTERFACE_H
#define FIFE_GUI_LIBROCKETRENDERINTERFACE_H

// Standard C++ library includes
#include <list>
#include <queue>
#include <vector>

// 3rd party library includes
#include <Rocket/Core/RenderInterface.h>

// FIFE includes
// These includes are split up in two parts, separated by one empty line
// First block: files included from the FIFE root src directory
// Second block: files included from the same folder
#include "util/base/singleton.h"
#include "util/resource/resource.h"
#include "util/structures/rect.h"
#include "util/structures/point.h"
#include "video/color.h"
#include "video/renderbackend.h"

namespace FIFE {
    
    class ImageManager;
    class RenderBackend;
    
    class LibRocketRenderInterface : public Rocket::Core::RenderInterface {
    public:
        
        LibRocketRenderInterface();
        
        virtual ~LibRocketRenderInterface();
        
        virtual void RenderGeometry(Rocket::Core::Vertex* vertices, int num_vertices, int* indices, int num_indices, Rocket::Core::TextureHandle texture, const Rocket::Core::Vector2f& translation);

        virtual Rocket::Core::CompiledGeometryHandle CompileGeometry(Rocket::Core::Vertex* vertices, int num_vertices, int* indices, int num_indices, Rocket::Core::TextureHandle texture);

        virtual void RenderCompiledGeometry(Rocket::Core::CompiledGeometryHandle geometry, const Rocket::Core::Vector2f& translation);
        
        virtual void ReleaseCompiledGeometry(Rocket::Core::CompiledGeometryHandle geometry);

        virtual void EnableScissorRegion(bool enable);
        
        virtual void SetScissorRegion(int x, int y, int width, int height);

        virtual bool LoadTexture(Rocket::Core::TextureHandle& texture_handle, Rocket::Core::Vector2i& texture_dimensions, const Rocket::Core::String& source);
        
        virtual bool GenerateTexture(Rocket::Core::TextureHandle& texture_handle, const Rocket::Core::byte* source, const Rocket::Core::Vector2i& source_dimensions);
        
        virtual void ReleaseTexture(Rocket::Core::TextureHandle texture_handle);
        
        void render();
        
        void freeTextures();
        
    private:
        
        RenderBackend* m_renderBackend;
        
        ImageManager* m_imageManager;
        
        class GeometryCallData {
        public:
            std::vector<GuiVertex> vertices;
            std::vector<int> indices;
            ResourceHandle textureHandle;
            DoublePoint translation;
        };
        
        typedef std::queue<GeometryCallData> GeometryCallDataChain;
        
        class GeometryCall {
        public:
            
            GeometryCall() 
            : 
            enableScissorTest(false),
            hasScissorArea(false)
            {
            }
            
            GeometryCallDataChain callChain;
            Rect scissorArea;
            bool enableScissorTest;
            bool hasScissorArea;
        };
        
        std::queue<GeometryCall> m_geometryCalls;
        
        std::list<ResourceHandle> m_freedTextures;
    };
    
};

#endif // FIFE_GUI_LIBROCKETRENDERINTERFACE_H