rover/src/drivers/oled_drivers/Adafruit_GFX.h

/******************************************************************
 This is the core graphics library for all our displays, providing
 basic graphics primitives (points, lines, circles, etc.). It needs
 to be paired with a hardware-specific library for each display
 device we carry (handling the lower-level functions).
 
 Adafruit invests time and resources providing this open
 source code, please support Adafruit and open-source hardware
 by purchasing products from Adafruit!
 
 Written by Limor Fried/Ladyada for Adafruit Industries.
 BSD license, check https://opensource.org/licenses/BSD-2-Clause for more information.
 All text above must be included in any redistribution.
 
02/18/2013 	Charles-Henri Hallard (http://hallard.me)
						Modified for compiling and use on Raspberry ArduiPi Board
						LCD size and connection are now passed as arguments on 
						the command line (no more #define on compilation needed)
						ArduiPi project documentation http://hallard.me/arduipi

 ******************************************************************/

#ifndef _ADAFRUIT_GFX_H
#define _ADAFRUIT_GFX_H

#include "ArduiPi_SSD1306.h"

#define BLACK 0
#define WHITE 1

#define swap(a, b) { int16_t t = a; a = b; b = t; }

//class Adafruit_GFX : public Print {
class Adafruit_GFX {
	public:
	
		//Adafruit_GFX();
		// i have no idea why we have to formally call the constructor. kinda sux
		void constructor(int16_t w, int16_t h);

		// this must be defined by the subclass
		void drawPixel(int16_t x, int16_t y, uint16_t color);
		void invertDisplay(boolean i) ;

		// the printf function
		void printf( const char * format, ...);
		void print( const char * string) ;


		// these are 'generic' drawing functions, so we can share them!
		void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color);
		void drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color);
		void drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color);
		void drawRect(int16_t x, int16_t y, int16_t w, int16_t h,
		uint16_t color);
		void fillRect(int16_t x, int16_t y, int16_t w, int16_t h,
		uint16_t color);
		
		void drawVerticalBargraph(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color, uint16_t percent) ;
		void drawHorizontalBargraph(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color, uint16_t percent) ;


		void fillScreen(uint16_t color);

		void drawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color);
		void drawCircleHelper(int16_t x0, int16_t y0,
		int16_t r, uint8_t cornername, uint16_t color);
		void fillCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color);
		void fillCircleHelper(int16_t x0, int16_t y0, int16_t r,
		uint8_t cornername, int16_t delta, uint16_t color);

		void drawTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1,
		int16_t x2, int16_t y2, uint16_t color);
		void fillTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1,
		int16_t x2, int16_t y2, uint16_t color);
		void drawRoundRect(int16_t x0, int16_t y0, int16_t w, int16_t h,
		int16_t radius, uint16_t color);
		void fillRoundRect(int16_t x0, int16_t y0, int16_t w, int16_t h,
		int16_t radius, uint16_t color);
		
		void drawBitmap(int16_t x, int16_t y,
		const uint8_t *bitmap, int16_t w, int16_t h,
		uint16_t color);
		void drawChar(int16_t x, int16_t y, unsigned char c,
		uint16_t color, uint16_t bg, uint8_t size);
		size_t write(uint8_t);

		void setCursor(int16_t x, int16_t y);
		void setTextColor(uint16_t c);
		void setTextColor(uint16_t c, uint16_t bg);
		void setTextSize(uint8_t s);
		void setTextWrap(boolean w);

		int16_t height(void);
		int16_t width(void);

		void setRotation(uint8_t r);
		uint8_t getRotation(void);

	protected:
		uint8_t *poledbuff;	// Pointer to OLED data buffer in memory
		int8_t _i2c_addr, dc, rst, cs;
		int16_t ssd1306_lcdwidth, ssd1306_lcdheight;
		uint8_t vcc_type;

	protected:
		int16_t  WIDTH, HEIGHT;   // this is the 'raw' display w/h - never changes
		int16_t  _width, _height; // dependent on rotation
		int16_t  cursor_x, cursor_y;
		uint16_t textcolor, textbgcolor;
		uint8_t  textsize;
		uint8_t  rotation;
		boolean  wrap; // If set, 'wrap' text at right edge of display
};

#endif