PainterRGB565
touchgfx/widgets/canvas/PainterRGB565.hpp
The PainterRGB565 class allows a shape to be filled with a given color and alpha value. This allows transparent, anti-aliased elements to be drawn.
See: AbstractPainter
Inherits from: AbstractPainterRGB565, AbstractPainterColor, AbstractPainter
Public Functions
| 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 |
| Paints a streak of pixels (all with the same alpha) in the framebuffer. | |
| PainterRGB565(colortype color =0) | |
| Initializes a new instance of the PainterRGB565 class. | |
| virtual void | setColor(colortype color) |
| Sets color to use when drawing the CanvasWidget. | |
| virtual void | tearDown() const |
| This function is called after all paint operation have finished. | |
Protected Attributes
| uint16_t | color565 |
| The native color in 565 format (for speed reasons) | |
Additional inherited members
Public Functions inherited from AbstractPainterRGB565
| AbstractPainterRGB565() | |
| FORCE_INLINE_FUNCTION uint16_t | alphaBlend(uint16_t newpix, uint16_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 uint16_t | alphaBlend(uint16_t R, uint16_t G, uint16_t B, uint16_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 Attributes inherited from AbstractPainterRGB565
| const uint16_t | BMASK |
| Mask for blue (0000000000011111) | |
| const uint16_t | GMASK |
| Mask for green (0000011111100000) | |
| const uint16_t | RMASK |
| Mask for red (1111100000000000) | |
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 bool | setup(const Rect & widgetRect) const |
| This function is called before any actual paint operation is started. | |
| 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
getRenderingMethod
| virtual HAL::RenderingMethod getRenderingMethod | ( | ) | const |
Return the applicable rendering method of the painter.
HARDWARE if the painter uses hardware based drawing, SOFTWARE otherwise. Relevant on platforms using DCACHE.
HARDWARE if painter uses hardware based drawing, SOFTWARE otherwise.
Reimplements: touchgfx::AbstractPainter::getRenderingMethod
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().
| 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. |
Reimplements: touchgfx::AbstractPainter::paint
PainterRGB565
| PainterRGB565 | ( | colortype | color =0 | ) | |
Initializes a new instance of the PainterRGB565 class.
| color | (Optional) the color, default is black. |
setColor
Sets color to use when drawing the CanvasWidget.
| color | The color. |
Reimplements: touchgfx::AbstractPainterColor::setColor
tearDown
| virtual void tearDown | ( | ) | const |
This function is called after all paint operation have finished.
This allows the painter to close down dma queues etc. This happens after the last scan line segment has been drawn.
Reimplements: touchgfx::AbstractPainter::tearDown
Protected Attributes Documentation
color565
uint16_t color565
The native color in 565 format (for speed reasons)