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Add clearDisplay() and display() as stubs #411

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Add clearDisplay() and display() as stubs #411

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6433901
Add clearDisplay() and display() as stubs
Beirdo Dec 19, 2016
3fbf573
Remove extra blank lines
Beirdo Jan 27, 2023
3ca0b6a
Allow to skip SPI for tight FLASH situations
Beirdo Mar 7, 2023
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14 changes: 14 additions & 0 deletions Adafruit_GFX.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -172,6 +172,20 @@ void Adafruit_GFX::writeLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1,
}
}

/**************************************************************************/
/*!
@brief Clear the display, overwrite in subclasses.
*/
/**************************************************************************/
void Adafruit_GFX::clearDisplay() {}

/**************************************************************************/
/*!
@brief Update the display, overwrite in subclasses.
*/
/**************************************************************************/
void Adafruit_GFX::display() {}

/**************************************************************************/
/*!
@brief Start a display-writing routine, overwrite in subclasses.
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4 changes: 4 additions & 0 deletions Adafruit_GFX.h
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Expand Up @@ -10,7 +10,9 @@
#include "gfxfont.h"

#include <Adafruit_I2CDevice.h>
#ifndef SKIP_SPI
#include <Adafruit_SPIDevice.h>
#endif

/// 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
Expand Down Expand Up @@ -43,6 +45,8 @@ class Adafruit_GFX : public Print {
virtual void writeLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1,
uint16_t color);
virtual void endWrite(void);
virtual void clearDisplay(void);
virtual void display(void);

// CONTROL API
// These MAY be overridden by the subclass to provide device-specific
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