Fonts.h

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//
// Copyright 2021 Arvind Singh
//
// This library 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.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; If not, see <http://www.gnu.org/licenses/>.
 
 
#ifndef _TGX_FONTS_H_
#define _TGX_FONTS_H_
 
#include <stdint.h>
#include "Misc.h"
#include "Vec2.h"
#include "Box2.h"
 
 
//****************************************************************************
//****************************************************************************
//****************************************************************************
// FONT FORMATS
//
// !!! The Adafruit GFX and ILI9341_t3 libraries should be included before 
//     this header if you want ot use these libraries !!!
//****************************************************************************
//****************************************************************************
//****************************************************************************
 
 
 
//Should we use the code below to force include whenever possible? probably not...
//#ifdef __cplusplus
//#if __has_include(<gfxfont.h>)
//#include <gfxfont.h>
//#endif
//#endif
 
#ifndef _GFXFONT_H_
#define _GFXFONT_H_
 
// Font data stored PER GLYPH
typedef struct {
    uint16_t bitmapOffset; 
    uint8_t width;         
    uint8_t height;        
    uint8_t xAdvance;      
    int8_t xOffset;        
    int8_t yOffset;        
} GFXglyph;
 
 
typedef struct {
    uint8_t* bitmap;  
    GFXglyph* glyph;  
    uint8_t first;    
    uint8_t last;     
    uint8_t yAdvance; 
} GFXfont;
 
#endif 
 
 
 
 
//Should we use the code below to force include whenever possible? probably not...
//#ifdef __cplusplus
//#if __has_include(<ILI9341_t3.h>)
//#include <ILI9341_t3.h>
//#endif
//#endif
//#ifndef _ILI9341_t3H_
//#define _ILI9341_t3H_
 
#ifndef _ILI9341_FONTS_H_
#define _ILI9341_FONTS_H_
 
typedef struct {
    const unsigned char* index;     
    const unsigned char* unicode;   
    const unsigned char* data;      
    unsigned char version;          
    unsigned char reserved;         
    unsigned char index1_first;     
    unsigned char index1_last;      
    unsigned char index2_first;     
    unsigned char index2_last;      
    unsigned char bits_index;       
    unsigned char bits_width;       
    unsigned char bits_height;      
    unsigned char bits_xoffset;     
    unsigned char bits_yoffset;     
    unsigned char bits_delta;       
    unsigned char line_space;       
    unsigned char cap_height;       
} ILI9341_t3_font_t;
 
#endif
 
// add alias to make it compatible with projectitis's format...
typedef ILI9341_t3_font_t packedbdf_t; 
 
 
 
namespace tgx
    {
 
 
    int fontHeight(const GFXfont& font);
 
 
    int fontHeight(const ILI9341_t3_font_t& font);
 
 
    iBox2 measureChar(char c, iVec2 pos, const GFXfont& font, Anchor anchor = DEFAULT_TEXT_ANCHOR, int* xadvance = nullptr);
 
 
    iBox2 measureChar(char c, iVec2 pos, const ILI9341_t3_font_t& font, Anchor anchor = DEFAULT_TEXT_ANCHOR, int* xadvance = nullptr);
 
 
 
 
 
    namespace tgx_internals
        {
 
        inline uint32_t fetchbit(const uint8_t* p, uint32_t index) { return (p[index >> 3] & (0x80 >> (index & 7))); } //fetch a single bit from a bit array. (from ili9341_t3.cpp)        
 
        uint32_t fetchbits_unsigned(const uint8_t* p, uint32_t index, uint32_t required);
 
        uint32_t fetchbits_signed(const uint8_t* p, uint32_t index, uint32_t required);
 
        }
 
    }
 
 
 
 
#endif