TextConstructor.h

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/**--------------------------------------------------------------------------------------------
Copyright (c) 2019, NDEVR LLC
tyler.parke@ndevr.org
  __    __   ____     _____ __     __  _______
 |  \  |  | |  __ \  |  ___|\ \   / / |   __  \
 |   \ |  | | |  \ \ | |___  \ \ / /  |  |__)  |
 |  . \|  | | |__/ / | |___   \ V /   |   _   /
 |  |\    |_|_____/__|_____|___\_/____|  | \  \
 |__| \__________________________________|  \__\
 
Subject to the terms of the Enterprise+ Agreement, NDEVR hereby grants 
Licensee a limited, non-exclusive, non-transferable, royalty-free license 
(without the right to sublicense) to use the API solely for the purpose of 
Licensee's internal development efforts to develop applications for which 
the API was provided.
 
The above copyright notice and this permission notice shall be included in all 
copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.
 
Library: Design
File: TextConstuctor
Included in API: True
Author(s): Tyler Parke
 *-----------------------------------------------------------------------------------------**/
#pragma once
#include <NDEVR/Model.h>
#include <NDEVR/Geometry.h>
#include <NDEVR/Font.h>
#include <NDEVR/Pointer.h>
#if NDEVR_TEXT_MODEL
struct FT_LibraryRec_;
struct FT_FaceRec_;
struct FT_Vector_;
namespace NDEVR
{
    struct Font;
    struct NDEVR_DESIGN_API FreeTypeLibrary
    {
        FreeTypeLibrary();
        ~FreeTypeLibrary();
        FT_LibraryRec_* m_ftLibrary;
    };
 
    struct NDEVR_DESIGN_API FreeTypeFace
    {
        FreeTypeFace();
        FreeTypeFace(const FreeTypeLibrary &library, const Font& font);
        FreeTypeFace(FreeTypeFace&& face);
        ~FreeTypeFace();
        FreeTypeFace& operator=(FreeTypeFace&& face) noexcept;
        FT_FaceRec_* m_ftFace;
    };
    class NDEVR_DESIGN_API TextConstructor
    {
    public:
        TextConstructor();
        TextConstructor(const String& app_font, bool cache_font_geometry = true);
        TextConstructor(const Font& font, bool cache_font_geometry = true);
        Geometry getCharMesh(Model& parent, wchar symbol);
        void ensureCharExists(wchar symbol);
        fltp08 fontHeight() const;
        Vector<2, fltp08> symbolAdvance(wchar symbol) const;
        Vector<2, fltp08> symbolAdvance(wchar symbol_a, wchar symbol_b) const;
        Vector<2, fltp08> fontSize() const;
        void setFont(Font font, bool cache_font_geometry = true);
        const Font& currentFont() const { return m_current_font; }
        bool canConstructGeometry() const;
        void cacheFont();
        static DynamicPointer< TextConstructor> DefaultConstructor(Font font);
    private:
        void LoadGlyph(wchar symbol) const;
        bool OutlineExists() const;
        void ExtractOutline();
        void ComputeViewBox();
 
        static int MoveToFunction(const FT_Vector_ *to, void *user);
        static int LineToFunction(const FT_Vector_ *to, void *user);
        static int ConicToFunction(const FT_Vector_ *control, const FT_Vector_ *to, void *user);
        static int CubicToFunction(const FT_Vector_ *controlOne, const FT_Vector_ *controlTwo, const FT_Vector_ *to, void *user);
        Geometry currentMesh();
        
    private:
        UUID textUUID(wchar symbol) const;
        // These two lines initialize the library and the face;
        // the order is important!
        Font m_current_font;
        FreeTypeLibrary m_library;
        FreeTypeFace m_face;
        uint04 m_curve_seg;
        DynamicPointer<Model> m_font_model;
        mutable Dictionary<UUID, Vector<2, fltp08>> m_symbol_advance;
        mutable Dictionary<UUID, Dictionary<UUID, uint04>> m_model_copy;
        Dictionary<UUID, Geometry> m_geometry;
        wchar m_current_char;
        Vector<2, fltp08> m_last_point;
 
    };
 
}
#endif