Adafuit GFX

Github Repo	C Header	C source	JS source
mongoose-os-libs/arduino-adafruit-gfx	Adafruit_GFX.h

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drawPixel

virtual void drawPixel(int16_t x, int16_t y, uint16_t color) = 0;

Constructor This MUST be defined by the subclass:

startWrite

virtual void startWrite(void);
  virtual void writePixel(int16_t x, int16_t y, uint16_t color);
  virtual void writeFillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color);
  virtual void writeFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color);
  virtual void writeFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color);
  virtual void writeLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color);
  virtual void endWrite(void);

TRANSACTION API / CORE DRAW API These MAY be overridden by the subclass to provide device-specific optimized code. Otherwise 'generic' versions are used.

setRotation

virtual void setRotation(uint8_t r);
  virtual void invertDisplay(boolean i);

CONTROL API These MAY be overridden by the subclass to provide device-specific optimized code. Otherwise 'generic' versions are used.

getCursorX

int16_t getCursorX(void) const;
  int16_t getCursorY(void) const;

get current cursor position (get rotation safe maximum values, using: width() for x, height() for y)

initButton

void initButton(Adafruit_GFX *gfx, int16_t x, int16_t y,
   uint16_t w, uint16_t h, uint16_t outline, uint16_t fill,
   uint16_t textcolor, char *label, uint8_t textsize);
  // New/alt initButton() uses upper-left corner & size
  void initButtonUL(Adafruit_GFX *gfx, int16_t x1, int16_t y1,
   uint16_t w, uint16_t h, uint16_t outline, uint16_t fill,
   uint16_t textcolor, char *label, uint8_t textsize);
  void drawButton(boolean inverted = false);
  boolean contains(int16_t x, int16_t y);

"Classic" initButton() uses center & size

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