Diff: Adafruit_LEDBackpack/Adafruit_GFX.h

Revision:

0:d6c9b09b4042

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Adafruit_LEDBackpack/Adafruit_GFX.h	Wed Dec 02 18:02:03 2020 +0000
@@ -0,0 +1,111 @@
+/***********************************
+This is a our graphics core library, for all our displays. 
+We'll be adapting all the
+existing libaries to use this core to make updating, support 
+and upgrading easier!
+
+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 license.txt for more information
+All text above must be included in any redistribution
+****************************************/
+
+/*
+ *  Modified by Neal Horman 7/14/2012 for use in LPC1768
+ */
+
+#ifndef _ADAFRUIT_GFX_H_
+#define _ADAFRUIT_GFX_H_
+
+static inline void swap(int16_t &a, int16_t &b)
+{
+    int16_t t = a;
+    
+    a = b;
+    b = t;
+}
+
+#ifndef _BV
+#define _BV(bit) (1<<(bit))
+#endif
+
+#define BLACK 0
+#define WHITE 1
+
+class Adafruit_GFX : public Stream
+{
+ public:
+    Adafruit_GFX(int16_t w, int16_t h)
+        : _rawWidth(w)
+        , _rawHeight(h)
+        , _width(w)
+        , _height(h)
+        , cursor_x(0)
+        , cursor_y(0)
+        , textcolor(WHITE)
+        , textbgcolor(BLACK)
+        , textsize(1)
+        , rotation(0)
+        , wrap(true)
+        {};
+
+    // this must be defined by the subclass
+    virtual void drawPixel(int16_t x, int16_t y, uint16_t color) = 0;
+    // this is optional
+    virtual void invertDisplay(bool i) {};
+    
+    // Stream implementation - provides printf() interface
+    // You would otherwise be forced to use writeChar()
+    virtual int _putc(int value) { return writeChar(value); };
+    virtual int _getc() { return -1; };
+
+#ifdef WANT_ABSTRACTS
+    // these are 'generic' drawing functions, so we can share them!
+    virtual void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color);
+    virtual void drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color);
+    virtual void drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color);
+    virtual void drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color);
+    virtual void fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color);
+    virtual 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);
+#endif
+
+    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 writeChar(uint8_t);
+
+    int16_t width(void) { return _width; };
+    int16_t height(void) { return _height; };
+
+    void setCursor(int16_t x, int16_t y) { cursor_x = x; cursor_y = y; };
+    void setTextSize(uint8_t s) { textsize = (s > 0) ? s : 1; };
+    void setTextColor(uint16_t c) { textcolor = c; textbgcolor = c; }
+    void setTextColor(uint16_t c, uint16_t b) { textcolor = c; textbgcolor = b; };
+    void setTextWrap(bool w) { wrap = w; };
+
+    void setRotation(uint8_t r);
+    uint8_t getRotation(void) { rotation %= 4; return rotation; };
+
+protected:
+    int16_t  _rawWidth, _rawHeight;   // 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;
+    bool  wrap; // If set, 'wrap' text at right edge of display
+};
+
+#endif