AbstractPainterGRAY4

touchgfx/widgets/canvas/AbstractPainterGRAY4.hpp

The AbstractPainterGRAY4 class is an abstract class for creating a painter to draw on a GRAY4 display using CanvasWidgetRenderer.

See: AbstractPainter

Inherits from: AbstractPainter

Inherited by: PainterGRAY4, PainterGRAY4Bitmap

Public Functions


	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 void	paint(uint8_t * destination, int16_t offset, int16_t widgetX, int16_t widgetY, int16_t count, uint8_t alpha) const =0
	Paints a streak of pixels (all with the same alpha) in the framebuffer.

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.


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


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