Rack/src/app/LightWidget.cpp

#include "app.hpp"
#include "util/color.hpp"


namespace rack {


void LightWidget::draw(NVGcontext *vg) {
	drawLight(vg);
	drawHalo(vg);
}

void LightWidget::drawLight(NVGcontext *vg) {
	float radius = box.size.x / 2.0;

	nvgBeginPath(vg);
	nvgCircle(vg, radius, radius, radius);

	// Background
	nvgFillColor(vg, bgColor);
	nvgFill(vg);

	// Foreground
	nvgFillColor(vg, color);
	nvgFill(vg);

	// Border
	nvgStrokeWidth(vg, 0.5);
	nvgStrokeColor(vg, borderColor);
	nvgStroke(vg);
}

void LightWidget::drawHalo(NVGcontext *vg) {
	float radius = box.size.x / 2.0;
	float oradius = radius + 15.0;

	nvgBeginPath(vg);
	nvgRect(vg, radius - oradius, radius - oradius, 2*oradius, 2*oradius);

	NVGpaint paint;
	NVGcolor icol = colorMult(color, 0.08);
	NVGcolor ocol = nvgRGB(0, 0, 0);
	paint = nvgRadialGradient(vg, radius, radius, radius, oradius, icol, ocol);
	nvgFillPaint(vg, paint);
	nvgGlobalCompositeOperation(vg, NVG_LIGHTER);
	nvgFill(vg);
}


} // namespace rack