TouchGFX
PainterVerticalAlpha::renderInit() is only used within TouchGFX.
 
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CodeScopeSTM32 Libraries and SamplesTouchGFXPainterVerticalAlpha::renderInit()

PainterVerticalAlpha::renderInit() method

@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.

Syntax

virtual bool renderInit();
Implemented in PainterVerticalAlpha.cpp:42

Return value

true if it succeeds, false if it fails.

References

LocationReferrerScopeText
PainterVerticalAlpha.cpp:42
bool PainterVerticalAlpha::renderInit()
PainterVerticalAlpha.hpp:102
virtual bool renderInit();
PainterVerticalAlpha.cpp:60PainterVerticalAlpha::render()PainterVerticalAlpha
renderInit(); // re-use code to set painterAlpha

Call Tree

Functions calling PainterVerticalAlpha::renderInit()
all items filtered out
PainterVerticalAlpha::renderInit()
Data read by PainterVerticalAlpha::renderInit()
Data written by PainterVerticalAlpha::renderInit()
PainterVerticalAlpha::renderInit()::gradientAlpha
all items filtered out
PainterVerticalAlpha::renderInit()
PainterVerticalAlpha::renderInit()::gradientAlpha
all items filtered out
Methods overriding this one
PainterVerticalAlpha::renderInit()
all items filtered out