glyph.h

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
#pragma once
 
#include <nap/numeric.h>
#include <rtti/typeinfo.h>
#include <utility/errorstate.h>
#include <glm/glm.hpp>
 
namespace nap
{
    class FontInstance;
    class Core;
 
    class NAPAPI Glyph final
    {
        friend FontInstance;
        RTTI_ENABLE()
    public:
        
        // Default construction is not allowed
        Glyph() = delete;
 
        ~Glyph();
 
        // Copy is not allowed
        Glyph(const Glyph& other) = delete;
        Glyph& operator=(const Glyph&) = delete;
 
        // Move is not allowed
        Glyph(Glyph&& other) = delete;
        Glyph& operator=(Glyph&& other) = delete;
 
        uint getIndex() const                                   { return mIndex; }
 
        bool isValid();
 
        int getHorizontalAdvance() const                        { return mAdvance.x; }
 
        int getVerticalAdvance() const                          { return mAdvance.y; }
 
        inline void* getHandle() const                          { return mHandle; }
 
    protected:
        Glyph(void* handle, uint index);
 
    private:
        void*       mHandle = nullptr;          
        uint        mIndex = 0;                 
        glm::ivec2  mAdvance = { -1, -1 };      
    };
 
 
    // IGlyphRepresentation
 
    class NAPAPI IGlyphRepresentation
    {
        friend FontInstance;
        RTTI_ENABLE()
    public:
        virtual ~IGlyphRepresentation()                         { }
 
        IGlyphRepresentation(nap::Core& core);
 
        // Copy is not allowed
        IGlyphRepresentation(const IGlyphRepresentation& other) = delete;
        IGlyphRepresentation& operator=(const IGlyphRepresentation&) = delete;
 
        // Move is not allowed
        IGlyphRepresentation(IGlyphRepresentation&& other) = delete;
        IGlyphRepresentation& operator=(IGlyphRepresentation&& other) = delete;
 
    protected:
        bool init(const Glyph& glyph, utility::ErrorState& error)                       { return onInit(glyph, error); }
 
        virtual bool onInit(const Glyph& glyph, utility::ErrorState& error) = 0;
 
        nap::Core* mCore;   
    };
}