PainterBW
PainterBW is used for drawing one 1bpp displays. The color is either on or off. No transparency is supported.
See: AbstractPainter
Inherits from: AbstractPainterBW, AbstractPainter
Public Functions
unsigned | bw(unsigned red, unsigned green, unsigned blue) |
Converts the selected color to either white (1) or black (0) depending on the gray representation of the RGB color. | |
colortype | getColor() const |
Gets the current color. | |
virtual void | render(uint8_t ptr, int x, int xAdjust, int y, unsigned count, const uint8_t covers) |
Paint a designated part of the RenderingBuffer with respect to the amount of coverage of each pixel given by the parameter covers. | |
void | setColor(colortype color) |
Sets color to use when drawing the CanvasWidget. | |
Protected Functions
virtual bool | renderNext(uint8_t & color) |
Get the color of the next pixel in the scan line to blend into the framebuffer. | |
Protected Attributes
uint8_t | painterBW |
The color to use when painting. | |
colortype | painterColor |
The painter color. | |
Additional inherited members
Public Functions inherited from AbstractPainterBW
Protected Functions inherited from AbstractPainterBW
virtual bool | renderInit() |
Initialize rendering of a single scan line of pixels for the render. | |
Protected Attributes inherited from AbstractPainterBW
int | currentX |
Current x coordinate relative to the widget. | |
int | currentY |
Current y coordinate relative to the widget. | |
Public Functions inherited from AbstractPainter
AbstractPainter() | |
Initializes a new instance of the AbstractPainter class. | |
virtual | ~AbstractPainter() |
Finalizes an instance of the AbstractPainter class. | |
Protected Functions inherited from AbstractPainter
void | setAreaOffset(uint16_t offsetX, uint16_t offsetY) |
Sets the offset of the area being drawn. | |
void | setWidgetAlpha(const uint8_t alpha) |
Sets the widget alpha to allow an entire canvas widget to easily be faded without changing the painter of the widget. | |
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 | areaOffsetX |
The offset x coordinate of the area being drawn. | |
int16_t | areaOffsetY |
The offset y coordinate of the area being drawn. | |
uint8_t | widgetAlpha |
The alpha of the widget using the painter. | |
Public Functions Documentation
bw
static unsigned bw | ( | unsigned | red , | ||
unsigned | green , | ||||
unsigned | blue | ||||
) |
Converts the selected color to either white (1) or black (0) depending on the gray representation of the RGB color.
red | The red color. |
green | The green color. |
blue | The blue color. |
1 (white) if the brightness of the RGB color is above 50% and 0 (black) otherwise.
getColor
colortype getColor | ( | ) | const |
Gets the current color.
The color.
render
virtual void render | ( | uint8_t * | ptr , | ||
int | x , | ||||
int | xAdjust , | ||||
int | y , | ||||
unsigned | count , | ||||
const uint8_t * | covers | ||||
) |
Paint a designated part of the RenderingBuffer with respect to the amount of coverage of each pixel given by the parameter covers.
The cover is the alpha for each pixel, which is what makes it possible to have smooth anti-aliased edges on the shapes drawn with CanvasWidgetRenderer.
ptr | Pointer to the row in the RenderingBuffer. |
x | The x coordinate. |
xAdjust | The minor adjustment of x (used when a pixel is smaller than a byte to specify that the ptr should have been advanced "xAdjust" pixels futher into the byte). |
y | The y coordinate. |
count | Number of pixels to fill. |
covers | The coverage in of each pixel. |
Note
The implementation of render() in the AbstractPainter classes is a generic (i.e. slow) implementation that should be completely implemented in subclasses of AbstractPainter for better performance.
Reimplements: touchgfx::AbstractPainterBW::render
setColor
Protected Functions Documentation
renderNext
virtual bool renderNext | ( | uint8_t & | color | ) | |
Get the color of the next pixel in the scan line to blend into the framebuffer.
color | The color (0 or 1). |
true if the pixel should be painted, false otherwise.
Reimplements: touchgfx::AbstractPainterBW::renderNext
Protected Attributes Documentation
painterBW
uint8_t painterBW
The color to use when painting.
painterColor
colortype painterColor
The painter color.