Method run

test/cairoTest/cairoTest.cpp:55–79

// Arc Negative
struct TestArcNegative : public TestBase {
	virtual void run( fli::cairo::Context &ctx ) {
		double xc = 128.0;
		double yc = 128.0;
		double radius = 100.0;
		double angle1 = 45.0  * ( M_PI / 180.0 );  /* angles are specified */
		double angle2 = 180.0 * ( M_PI / 180.0 );  /* in radians           */

		ctx.setSourceRgb( 0.0, 0.0, 0.0 );
		ctx.setLineWidth( 10.0 );
		ctx.arcNegative( xc, yc, radius, angle1, angle2 );
		ctx.stroke();

		/* draw helping lines */
		ctx.setSourceRgba( 1, 0.2, 0.2, 0.6 );
		ctx.setLineWidth( 6.0 );

		ctx.arc( xc, yc, 10.0, 0, 2*M_PI );
		ctx.fill();

		ctx.arc( xc, yc, radius, angle1, angle1 );
		ctx.lineTo( xc, yc);
		ctx.arc( xc, yc, radius, angle2, angle2 );
		ctx.lineTo( xc, yc );
		ctx.stroke();
	}
};

// clip