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Adafruit_GFX.h
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Adafruit_GFX.h
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#ifndef _ADAFRUIT_GFX_H
#define _ADAFRUIT_GFX_H
#include "gfxfont.h"
#include "inttypes.h"
/// A generic graphics superclass that can handle all sorts of drawing. At a minimum you can subclass and provide drawPixel(). At a maximum you can do a ton of overriding to optimize. Used for any/all Adafruit displays!
class Adafruit_GFX {
public:
Adafruit_GFX(int16_t w, int16_t h); // Constructor
// This MUST be defined by the subclass:
virtual void drawPixel(int16_t x, int16_t y, uint16_t color) = 0; ///< Virtual drawPixel() function to draw to the screen/framebuffer/etc, must be overridden in subclass. @param x X coordinate. @param y Y coordinate. @param color 16-bit pixel color.
// TRANSACTION API / CORE DRAW API
// These MAY be overridden by the subclass to provide device-specific
// optimized code. Otherwise 'generic' versions are used.
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);
// CONTROL API
// These MAY be overridden by the subclass to provide device-specific
// optimized code. Otherwise 'generic' versions are used.
virtual void setRotation(uint8_t r);
virtual void invertDisplay(boolean i);
// BASIC DRAW API
// These MAY be overridden by the subclass to provide device-specific
// optimized code. Otherwise 'generic' versions are used.
virtual void
// It's good to implement those, even if using transaction API
drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color),
drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color),
fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color),
fillScreen(uint16_t color),
// Optional and probably not necessary to change
drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color),
drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color);
// These exist only with Adafruit_GFX (no subclass overrides)
void
drawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color),
drawCircleHelper(int16_t x0, int16_t y0, int16_t r, uint8_t cornername,
uint16_t color),
fillCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color),
fillCircleHelper(int16_t x0, int16_t y0, int16_t r, uint8_t cornername,
int16_t delta, uint16_t color),
drawTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1,
int16_t x2, int16_t y2, uint16_t color),
fillTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1,
int16_t x2, int16_t y2, uint16_t color),
drawRoundRect(int16_t x0, int16_t y0, int16_t w, int16_t h,
int16_t radius, uint16_t color),
fillRoundRect(int16_t x0, int16_t y0, int16_t w, int16_t h,
int16_t radius, uint16_t color);
int16_t height(void) const;
int16_t width(void) const;
uint8_t getRotation(void) const;
protected:
const int16_t
WIDTH, ///< This is the 'raw' display width - never changes
HEIGHT; ///< This is the 'raw' display height - never changes
int16_t
_width, ///< DisplayDriver width as modified by current rotation
_height; ///< DisplayDriver height as modified by current rotation
uint8_t
rotation; ///< DisplayDriver rotation (0 thru 3)
};
#endif // _ADAFRUIT_GFX_H