PainterBGRA2222

touchgfx/widgets/canvas/PainterBGRA2222.hpp

The PainterBGRA2222 class allows a shape to be filled with a given color value. This allows anti-aliased elements to be drawn.

See: AbstractPainter

Inherits from: AbstractPainterBGRA2222, AbstractPainterColor, AbstractPainter

Public Functions


virtual void	paint(uint8_t * destination, int16_t offset, int16_t widgetX, int16_t widgetY, int16_t count, uint8_t alpha) const
	Paints a streak of pixels (all with the same alpha) in the framebuffer.

	PainterBGRA2222(colortype color =0)
	Initializes a new instance of the PainterBGRA2222 class.

virtual void	setColor(colortype color)
	Sets color to use when drawing the CanvasWidget.

Protected Attributes


uint8_t	color8
	Pre-calculated native color.

uint8_t	painterBlue
	The blue part of the color, used when alpha blending.

uint8_t	painterGreen
	The green part of the color, used when alpha blending.

uint8_t	painterRed
	The red part of the color, used when alpha blending.

Additional inherited members

Public Functions inherited from AbstractPainterBGRA2222


	AbstractPainterBGRA2222()


FORCE_INLINE_FUNCTION uint8_t	alphaBlend(uint8_t newpix, uint8_t bufpix, uint8_t alpha) const
	Mix colors from a new pixel and a buffer pixel with the given alpha applied to the new pixel, and the inverse alpha applied to the buffer pixel.

FORCE_INLINE_FUNCTION uint8_t	alphaBlend(uint8_t R, uint8_t G, uint8_t B, uint8_t bufpix, uint8_t alpha) const
	Mix colors from a new pixel and a buffer pixel with the given alpha applied to the new pixel, and the inverse alpha applied to the buffer pixel.

Public Functions inherited from AbstractPainterColor


	AbstractPainterColor(colortype color =0)
	Constructor.

colortype	getColor() const
	Gets the current color.

virtual	~AbstractPainterColor()
	Destructor.

Protected Attributes inherited from AbstractPainterColor


colortype	painterColor
	The color.

Public Functions inherited from AbstractPainter


	AbstractPainter()
	Initializes a new instance of the AbstractPainter class.

void	framebufferToDisplay(int16_t & widgetX, int16_t & widgetY) const
	Convert Framebuffer widget coordinates to display widget coordinates.

virtual HAL::RenderingMethod	getRenderingMethod() const
	Return the applicable rendering method of the painter.

virtual bool	setup(const Rect & widgetRect) const
	This function is called before any actual paint operation is started.

virtual void	tearDown() const
	This function is called after all paint operation have finished.

virtual	~AbstractPainter()
	Finalizes an instance of the AbstractPainter class.

Protected Functions inherited from AbstractPainter


FORCE_INLINE_FUNCTION bool	compatibleFramebuffer(Bitmap::BitmapFormat format)
	Helper function to check if the provided bitmap format matches the current framebuffer format.

Protected Attributes inherited from AbstractPainter


int16_t	widgetWidth
	The width of the widget on screen, used by framebufferToDisplay()

Public Functions Documentation

paint


virtual void paint	(	uint8_t *	destination ,	const
		int16_t	offset ,	const
		int16_t	widgetX ,	const
		int16_t	widgetY ,	const
		int16_t	count ,	const
		uint8_t	alpha	const
		)	const

Paints a streak of pixels (all with the same alpha) in the framebuffer.

The first pixel to paint is at 'offset' relative to 'destination' (to be able to support 1bpp, 2bpp and 4bpp). The first pixel to paint is at the given 'widgetX', 'widgetY' coordinate. The number of pixels to paint is 'count' and the alpha to apply is 'alpha'.

Note that the widgetX, widgetY is relative to the widget in the framebuffer, not the display. To convert the coordinate to display widget coordinates, use framebufferToDisplay().

Parameters:


destination	If non-null, the pointer.
offset	The offset to add to the destination.
widgetX	The widget x coordinate.
widgetY	The widget y coordinate.
count	Number of pixels.
alpha	The alpha of the pixels.