Adafruit_GFX.h

00001 /***********************************
00002 This is a our graphics core library, for all our displays. 
00003 We'll be adapting all the
00004 existing libaries to use this core to make updating, support 
00005 and upgrading easier!
00006 
00007 Adafruit invests time and resources providing this open source code, 
00008 please support Adafruit and open-source hardware by purchasing 
00009 products from Adafruit!
00010 
00011 Written by Limor Fried/Ladyada  for Adafruit Industries.  
00012 BSD license, check license.txt for more information
00013 All text above must be included in any redistribution
00014 ****************************************/
00015 
00016 /*
00017  *  Modified by Neal Horman 7/14/2012 for use in LPC1768
00018  */
00019 
00020 #ifndef _ADAFRUIT_GFX_H_
00021 #define _ADAFRUIT_GFX_H_
00022 
00023 static inline void swap(int16_t &a, int16_t &b)
00024 {
00025     int16_t t = a;
00026     
00027     a = b;
00028     b = t;
00029 }
00030 
00031 #ifndef _BV
00032 #define _BV(bit) (1<<(bit))
00033 #endif
00034 
00035 #define BLACK 0
00036 #define WHITE 1
00037 
00038 class Adafruit_GFX : public Stream
00039 {
00040  public:
00041     Adafruit_GFX(int16_t w, int16_t h)
00042         : _rawWidth(w)
00043         , _rawHeight(h)
00044         , _width(w)
00045         , _height(h)
00046         , cursor_x(0)
00047         , cursor_y(0)
00048         , textcolor(WHITE)
00049         , textbgcolor(BLACK)
00050         , textsize(1)
00051         , rotation(0)
00052         , wrap(true)
00053         {};
00054 
00055     // this must be defined by the subclass
00056     virtual void drawPixel(int16_t x, int16_t y, uint16_t color) = 0;
00057     // this is optional
00058     virtual void invertDisplay(bool i) {};
00059     
00060     // Stream implementation - provides printf() interface
00061     // You would otherwise be forced to use writeChar()
00062     virtual int _putc(int value) { return writeChar(value); };
00063     virtual int _getc() { return -1; };
00064 
00065 #ifdef WANT_ABSTRACTS
00066     // these are 'generic' drawing functions, so we can share them!
00067     virtual void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color);
00068     virtual void drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color);
00069     virtual void drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color);
00070     virtual void drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color);
00071     virtual void fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color);
00072     virtual void fillScreen(uint16_t color);
00073 
00074     void drawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color);
00075     void drawCircleHelper(int16_t x0, int16_t y0, int16_t r, uint8_t cornername, uint16_t color);
00076     void fillCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color);
00077     void fillCircleHelper(int16_t x0, int16_t y0, int16_t r, uint8_t cornername, int16_t delta, uint16_t color);
00078 
00079     void drawTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color);
00080     void fillTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color);
00081     void drawRoundRect(int16_t x0, int16_t y0, int16_t w, int16_t h, int16_t radius, uint16_t color);
00082     void fillRoundRect(int16_t x0, int16_t y0, int16_t w, int16_t h, int16_t radius, uint16_t color);
00083 #endif
00084 
00085     void drawBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t color);
00086     void drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size);
00087     size_t writeChar(uint8_t);
00088 
00089     int16_t width(void) { return _width; };
00090     int16_t height(void) { return _height; };
00091 
00092     void setCursor(int16_t x, int16_t y) { cursor_x = x; cursor_y = y; };
00093     void setTextSize(uint8_t s) { textsize = (s > 0) ? s : 1; };
00094     void setTextColor(uint16_t c) { textcolor = c; textbgcolor = c; }
00095     void setTextColor(uint16_t c, uint16_t b) { textcolor = c; textbgcolor = b; };
00096     void setTextWrap(bool w) { wrap = w; };
00097 
00098     void setRotation(uint8_t r);
00099     uint8_t getRotation(void) { rotation %= 4; return rotation; };
00100 
00101 protected:
00102     int16_t  _rawWidth, _rawHeight;   // this is the 'raw' display w/h - never changes
00103     int16_t  _width, _height; // dependent on rotation
00104     int16_t  cursor_x, cursor_y;
00105     uint16_t textcolor, textbgcolor;
00106     uint8_t  textsize;
00107     uint8_t  rotation;
00108     bool  wrap; // If set, 'wrap' text at right edge of display
00109 };
00110 
00111 #endif