GraphicDisplayDevice Class Reference

This is the abstract class to handle all generic behavior of physical graphic display devices (e.g. OLED screen SSD1306). More...

#include <display_device.h>

Inheritance diagram for GraphicDisplayDevice:

Collaboration diagram for GraphicDisplayDevice:

Public Member Functions
virtual void	check_display_device_compatibility (struct_ConfigGraphicWidget framebuffer_cfg, CanvasFormat canvas_format)=0
	A pure virtual member function. Each device must implement this method and check the compatibility of the widget parameter with the its physical limitations.
virtual void	show (Canvas *canvas, const uint8_t anchor_x, const uint8_t anchor_y)=0
	A pure virtual member function. It transfers the pixel buffer to the a part of display screen buffer starting at the (anchor_x, anchor_y) coordinates of the screen , expressed in pixel. This method takes into account the specific addressing scheme and memory structure of the actual display device.
	GraphicDisplayDevice (size_t screen_width, size_t screen_height)
	Construct a new Display Device object.
virtual	~GraphicDisplayDevice ()
	Destroy the Display Device object.

Public Attributes
size_t	TFT_panel_width_in_pixel
	the physical width of the screen (in pixel)
size_t	TFT_panel_height_in_pixel
	the physical height of the screen (in pixel)

Detailed Description

This is the abstract class to handle all generic behavior of physical graphic display devices (e.g. OLED screen SSD1306).

Constructor & Destructor Documentation

GraphicDisplayDevice()

GraphicDisplayDevice::GraphicDisplayDevice	(	size_t	screen_width,
		size_t	screen_height )

Construct a new Display Device object.

Parameters

screen_width	The width of physical screen, in pixel
screen_height	The height of physical screen, in pixel.

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Member Function Documentation

check_display_device_compatibility()

virtual void GraphicDisplayDevice::check_display_device_compatibility ( struct_ConfigGraphicWidget framebuffer_cfg, CanvasFormat canvas_format )

pure virtual

A pure virtual member function. Each device must implement this method and check the compatibility of the widget parameter with the its physical limitations.

Parameters

framebuffer_cfg	the widget configuration data
canvas_format	the format of the canvas

Implemented in SSD1306, and ST7735.

show()

virtual void GraphicDisplayDevice::show ( Canvas * canvas, const uint8_t anchor_x, const uint8_t anchor_y )

pure virtual

A pure virtual member function. It transfers the pixel buffer to the a part of display screen buffer starting at the (anchor_x, anchor_y) coordinates of the screen , expressed in pixel. This method takes into account the specific addressing scheme and memory structure of the actual display device.

Parameters

canvas	a pointer to the canvas that contains the buffer to be displayed
anchor_x	the x(horizontal) starting position of the frame within the display screen,(in pixel)
anchor_y	the y(vertical) starting position of the frame within the display screen,(in pixel)

Implemented in rtos_ST7735, SSD1306, and ST7735.

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The documentation for this class was generated from the following files:

• display_device.h
• display_device.cpp