draw-circle
wayland/vidor-graphics/draw-circle
Draw a circle.
draw-circle
@/draw-circle
Draw a circle.
GFX@/gfx-device
A Vidor graphics device.
Xnumber
Centre-point x coordinate.
Ynumber
Centre-point y coordinate.
Rnumber
Radius of circle (pixels).
Colorxod/color/color
Color of circle.
Alphanumber
Alpha compositing. Takes a value from 0 to 255.
Fillboolean
TRUE to fill circle with colour, FALSE to draw outline only.
UPDpulse
Update
Donepulse
Pulse on completion.
C++ implementation
#pragma XOD evaluate_on_pin disable
#pragma XOD evaluate_on_pin enable input_UPD
node {
void evaluate(Context ctx) {
if (!isInputDirty<input_UPD>(ctx))
return;
auto gfx = getValue<input_GFX>(ctx);
auto color = getValue<input_Color>(ctx);
uint32_t color32 = gfx->Color(color.r, color.g, color.b);
if (getValue<input_Fill>(ctx)){
gfx->fillCircle(
getValue<input_X>(ctx),
getValue<input_Y>(ctx),
getValue<input_R>(ctx),
color32,
getValue<input_Alpha>(ctx));
} else {
gfx->drawCircle(
getValue<input_X>(ctx),
getValue<input_Y>(ctx),
getValue<input_R>(ctx),
color32,
getValue<input_Alpha>(ctx)
);
}
emitValue<output_Done>(ctx, 1);
}
}