62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
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// Coded by Bodmer 10/2/18, see license in root directory.
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// This is part of the TFT_eSPI class and is associated with anti-aliased font functions
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public:
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// These are for the new anti-aliased fonts
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void loadFont(const uint8_t array[]);
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#ifdef FONT_FS_AVAILABLE
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void loadFont(String fontName, fs::FS &ffs);
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#endif
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void loadFont(String fontName, bool flash = true);
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void unloadFont( void );
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bool getUnicodeIndex(uint16_t unicode, uint16_t *index);
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virtual void drawGlyph(uint16_t code);
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void showFont(uint32_t td);
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// This is for the whole font
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typedef struct
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{
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const uint8_t* gArray; //array start pointer
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uint16_t gCount; // Total number of characters
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uint16_t yAdvance; // Line advance
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uint16_t spaceWidth; // Width of a space character
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int16_t ascent; // Height of top of 'd' above baseline, other characters may be taller
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int16_t descent; // Offset to bottom of 'p', other characters may have a larger descent
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uint16_t maxAscent; // Maximum ascent found in font
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uint16_t maxDescent; // Maximum descent found in font
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} fontMetrics;
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fontMetrics gFont = { nullptr, 0, 0, 0, 0, 0, 0, 0 };
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// These are for the metrics for each individual glyph (so we don't need to seek this in file and waste time)
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uint16_t* gUnicode = NULL; //UTF-16 code, the codes are searched so do not need to be sequential
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uint8_t* gHeight = NULL; //cheight
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uint8_t* gWidth = NULL; //cwidth
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uint8_t* gxAdvance = NULL; //setWidth
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int16_t* gdY = NULL; //topExtent
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int8_t* gdX = NULL; //leftExtent
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uint32_t* gBitmap = NULL; //file pointer to greyscale bitmap
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bool fontLoaded = false; // Flags when a anti-aliased font is loaded
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#ifdef FONT_FS_AVAILABLE
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fs::File fontFile;
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fs::FS &fontFS = SPIFFS;
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bool spiffs = true;
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bool fs_font = false; // For ESP32/8266 use smooth font file or FLASH (PROGMEM) array
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#else
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bool fontFile = true;
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#endif
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private:
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void loadMetrics(void);
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uint32_t readInt32(void);
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uint8_t* fontPtr = nullptr;
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