CanvasHMSB Class Reference

A special version of canvas for monochrome widget with 8pixel/byte arranged horizontally. Usefull for monochrome widget (e.g.text) even for color RGB565 display device. More...

#include <canvas.h>

Inheritance diagram for CanvasHMSB:

Collaboration diagram for CanvasHMSB:

Public Member Functions
	CanvasHMSB (uint8_t canvas_width_pixel, uint8_t canvas_height_pixel)
	constructor for CanvasHMSB
void	fill_canvas_with_color (ColorIndex color)
	fill the canvas buffer with 0x00 (i.e. BLACK) of 0xFF (WHITE)
void	draw_pixel (const int x, const int y, const ColorIndex color=ColorIndex::WHITE)
	the graphic primitive to draw a pixel
Public Member Functions inherited from Canvas
	Canvas (uint8_t canvas_width_pixel, uint8_t canvas_height_pixel)
	Construct a new Canvas object.
void	clear_canvas_buffer ()
	fill the canvas buffer with 0x00

Additional Inherited Members
Public Attributes inherited from Canvas
CanvasFormat	canvas_format
	the actual format of the canvas
ColorIndex	canvas_fg_color
	a copy of the widget foreground color
ColorIndex	canvas_bg_color
	a copy of the widget background color
uint8_t	canvas_width_pixel
	the width (in pixel) of the canvas and also of those of the associated widget
uint8_t	canvas_height_pixel
	the height (in pixel) of the canvas and also of those of the associated widget
size_t	canvas_buffer_size
	the size (in bytes) of the buffer
uint8_t *	canvas_buffer {nullptr}
	the buffer

Detailed Description

A special version of canvas for monochrome widget with 8pixel/byte arranged horizontally. Usefull for monochrome widget (e.g.text) even for color RGB565 display device.

Constructor & Destructor Documentation

CanvasHMSB()

CanvasHMSB::CanvasHMSB	(	uint8_t	canvas_width_pixel,
		uint8_t	canvas_height_pixel )

constructor for CanvasHMSB

Parameters

canvas_width_pixel
canvas_height_pixel

Here is the call graph for this function:

Member Function Documentation

draw_pixel()

void CanvasHMSB::draw_pixel ( const int x, const int y, const ColorIndex color = ColorIndex::WHITE )

virtual

the graphic primitive to draw a pixel

Parameters

x	the x position of the pixel
y	the y position of the pixel
color	the color of the pixel

Implements Canvas.

fill_canvas_with_color()

void CanvasHMSB::fill_canvas_with_color ( ColorIndex color )

virtual

fill the canvas buffer with 0x00 (i.e. BLACK) of 0xFF (WHITE)

Note

the conversion from color bit (0b0 or 0b1) to RGB565 is done by the device after calling the show() member according to fg_color and bg_color

Parameters

color

Implements Canvas.

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

• canvas.h
• canvas.cpp