CanvasTrueRGB Class Reference

A special version of canvas for color widget (and device) with true RGB_COLOR_INDEX_8b color coding(i.e. 16bit) per pixel. More...

#include <canvas.h>

Inheritance diagram for CanvasTrueRGB:

Collaboration diagram for CanvasTrueRGB:

Public Member Functions
	CanvasTrueRGB (uint8_t canvas_width_pixel, uint8_t canvas_height_pixel)
	Construct a new Canvas R G B object.
virtual void	clear_canvas_buffer ()
	fill the 16bit canvas buffer with 0x00
void	fill_canvas_with_color (ColorIndex color)
	fill the canvas buffer with the given color index
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.

Private Member Functions
void	create_canvas_buffer ()
	Create a canvas buffer object.

Additional Inherited Members
Public Attributes inherited from Canvas
CanvasFormat	canvas_format
	the actual format of the canvas
ColorIndex	fg_color
	a copy of the widget foreground color
ColorIndex	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_byte
	the size (in bytes) of the buffer
size_t	canvas_buffer_size_pixel
	the size (in pixel) of the buffer
uint8_t *	canvas_buffer {nullptr}
	the 8bit canvas buffer
uint16_t *	canvas_16buffer {nullptr}
	the 16bit canvasbuffer

Detailed Description

A special version of canvas for color widget (and device) with true RGB_COLOR_INDEX_8b color coding(i.e. 16bit) per pixel.

Constructor & Destructor Documentation

CanvasTrueRGB()

CanvasTrueRGB::CanvasTrueRGB	(	uint8_t	canvas_width_pixel,
		uint8_t	canvas_height_pixel )

Construct a new Canvas R G B object.

Parameters

canvas_width_pixel
canvas_height_pixel

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Member Function Documentation

clear_canvas_buffer()

void CanvasTrueRGB::clear_canvas_buffer ( )

virtual

fill the 16bit canvas buffer with 0x00

Reimplemented from Canvas.

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create_canvas_buffer()

void CanvasTrueRGB::create_canvas_buffer ( )

privatevirtual

Create a canvas buffer object.

Implements Canvas.

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draw_pixel()

void CanvasTrueRGB::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 CanvasTrueRGB::fill_canvas_with_color ( ColorIndex color )

virtual

fill the canvas buffer with the given color index

Note

the conversion from color index to RGB_COLOR_INDEX_8b is done by the device after calling the show() member

Parameters

color

Implements Canvas.

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

• canvas.h
• canvas.cpp