AbstractPainterRGB565
touchgfx/widgets/canvas/AbstractPainterRGB565.hpp
The AbstractPainterRGB565 class is an abstract class for creating a painter to draw on a RGB565 display using CanvasWidgetRenderer.
See: AbstractPainter
Inherits from: AbstractPainter
Inherited by: PainterRGB565, PainterRGB565Bitmap, PainterRGB565L8Bitmap
Public Functions
| 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
| const uint16_t | BMASK |
| Mask for blue (0000000000011111) | |
| const uint16_t | GMASK |
| Mask for green (0000011111100000) | |
| const uint16_t | RMASK |
| Mask for red (1111100000000000) | |
Additional inherited members
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 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. | |
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
AbstractPainterRGB565
alphaBlend
| FORCE_INLINE_FUNCTION uint16_t alphaBlend | ( | uint16_t | newpix , | const | |
| uint16_t | bufpix , | const | |||
| uint8_t | alpha | const | |||
| ) | 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.
| newpix | The new pixel value. |
| bufpix | The buffer pixel value. |
| alpha | The alpha to apply to the new pixel. |
The result of blending the two colors into a new color.
alphaBlend
| FORCE_INLINE_FUNCTION uint16_t alphaBlend | ( | uint16_t | R , | const | |
| uint16_t | G , | const | |||
| uint16_t | B , | const | |||
| uint16_t | bufpix , | const | |||
| uint8_t | alpha | const | |||
| ) | 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.
| R | The red color (0-31 shifted into RMASK). |
| G | The green color (0-63 shifted into GMASK). |
| B | The blue color (0-31 shifted into BMASK). |
| bufpix | The buffer pixel value. |
| alpha | The alpha of the R,G,B. |
The result of blending the two colors into a new color.
Public Attributes Documentation
BMASK
const uint16_t BMASK = 0x001F
Mask for blue (0000000000011111)
GMASK
const uint16_t GMASK = 0x07E0
Mask for green (0000011111100000)
RMASK
const uint16_t RMASK = 0xF800
Mask for red (1111100000000000)