Radial gradient based on distance from the center. More...
#include <gradient.h>
Public Member Functions | |
| RadialGradient (FpPoint center, ColorGradient gradient, Box extents=Box::MaximumBox()) | |
| Create a radial gradient. | |
| Box | extents () const override |
| Return the bounding box encompassing all pixels that need to be drawn. | |
| void | readColors (const int16_t *x, const int16_t *y, uint32_t count, Color *result) const override |
| Read colors for the given points. | |
 Public Member Functions inherited from roo_display::Rasterizable | |
| void | readColorsMaybeOutOfBounds (const int16_t *x, const int16_t *y, uint32_t count, Color *result, Color out_of_bounds_color=color::Transparent) const |
| Read colors for points that may be out of bounds. | |
| virtual bool | readColorRect (int16_t xMin, int16_t yMin, int16_t xMax, int16_t yMax, Color *result) const |
| Read colors for a rectangle. | |
| std::unique_ptr< PixelStream > | createStream () const override |
Default createStream() using readColors(). | |
| std::unique_ptr< PixelStream > | createStream (const Box &bounds) const override |
Default createStream() for a clipped box using readColors(). | |
| Public Member Functions inherited from roo_display::Streamable | |
| virtual TransparencyMode | getTransparencyMode () const |
| Return the transparency mode for pixels in this stream. | |
| Public Member Functions inherited from roo_display::Drawable | |
| virtual | ~Drawable () |
| virtual Box | anchorExtents () const |
| Return the bounds used for alignment. | |
Additional Inherited Members | |
| Static Public Member Functions inherited from roo_display::Drawable | |
| static const Drawable * | Empty () |
| A singleton representing a no-op drawable with no bounding box. | |
| Protected Member Functions inherited from roo_display::Rasterizable | |
| void | drawTo (const Surface &s) const override |
Default drawTo() using readColors(). | |
Detailed Description
Radial gradient based on distance from the center.
Definition at line 75 of file gradient.h.
Constructor & Destructor Documentation
◆ RadialGradient()
| roo_display::RadialGradient::RadialGradient | ( | FpPoint | center, |
| ColorGradient | gradient, | ||
| Box | extents = Box::MaximumBox() |
||
| ) |
Create a radial gradient.
Value equals distance from center. No anti-aliasing is performed; keep node distances >= 1 to avoid jagged rings. For smooth outer edges, add a terminal node with color::Transparent at +1 distance.
Definition at line 100 of file gradient.cpp.
Member Function Documentation
◆ extents()
|
inlineoverridevirtual |
Return the bounding box encompassing all pixels that need to be drawn.
This method is called during a transaction and must not block or perform I/O.
Implements roo_display::Drawable.
Definition at line 85 of file gradient.h.
◆ readColors()
|
overridevirtual |
Read colors for the given points.
The caller must ensure all points are within bounds.
Implements roo_display::Rasterizable.
Definition at line 107 of file gradient.cpp.
References roo_display::ColorGradient::getColor(), and r.
The documentation for this class was generated from the following files:
- temp_repos/roo_display/src/roo_display/color/gradient.h
- temp_repos/roo_display/src/roo_display/color/gradient.cpp
