class PainterVerticalAlpha :
#if !defined(USE_BPP) || USE_BPP==16
public AbstractPainterRGB565
#elif USE_BPP==24
public AbstractPainterRGB888
#elif USE_BPP==4
public AbstractPainterGRAY4
#elif USE_BPP==2
public AbstractPainterGRAY2
#else
#error Unknown USE_BPP
#endif
{
public:
PainterVerticalAlpha(colortype color = 0, int alpha0atY = 100);
void setColor(colortype color, int alphaZeroAt);
virtual void render(uint8_t* ptr, int x, int xAdjust, int y, unsigned count, const uint8_t* covers);
protected:
virtual bool renderInit();
#if !defined(USE_BPP) || USE_BPP==16 || USE_BPP==24
virtual bool renderNext(uint8_t& pixelRed, uint8_t& pixelGreen, uint8_t& pixelBlue, uint8_t& pixelAlpha);
uint8_t painterRed;
uint8_t painterGreen;
uint8_t painterBlue;
#elif USE_BPP==4 || USE_BPP==2
virtual bool renderNext(uint8_t& gray, uint8_t& alpha);
uint8_t painterGray;
#else
#error Unknown USE_BPP
#endif
uint8_t painterAlpha;
int alpha0atY;
private:
};
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PainterVerticalAlpha class
@class PainterVerticalAlpha PainterVerticalAlpha.hpp gui/common/PainterVerticalAlpha.hpp A Painter that will paint using a fading color. PainterVerticalAlpha will paint using the given color at y coordinate 0 fading the color to invisible at the given y coordinate. @see AbstractPainter
Syntax
Fields
painterRed
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painterGreen
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painterBlue
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painterAlpha
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alpha0atY
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Methods
setColor()
@fn void PainterVerticalAlpha::setColor(colortype color, int alphaZeroAt); Sets color and alpha to use when drawing the CanvasWidget. Sets color and alpha to use when drawing the CanvasWidget. Read more...
render()
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renderInit()
@fn virtual bool PainterVerticalAlpha::renderInit(); Get ready to render (part of) a scanline. Get ready to render (part of) a scanline. Since the scanline will have the same y coordinate, the alpha for the scanline can be calculated here and used for all pixels in the scanline. Read more...
renderNext()
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References
| Location | Referrer | Scope | Text |
|---|---|---|---|
bool PainterVerticalAlpha::renderNext(uint8_t& pixelRed, uint8_t& pixelGreen, uint8_t& pixelBlue, uint8_t& pixelAlpha) |
Class Tree
Variables of PainterVerticalAlpha type
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