Exemplos de calculate_coefficients_lanczos em C++ (Cpp)

Exemplo n.º 1

Arquivo: reduceh.cpp Projeto: gargsms/libvips

/* Calculate a mask element. 
 */
void
vips_reduce_make_mask( double *c, VipsKernel kernel, double shrink, double x )
{
	switch( kernel ) {
	case VIPS_KERNEL_NEAREST:
		c[0] = 1.0;
		break;

	case VIPS_KERNEL_LINEAR:
		c[0] = 1.0 - x;
		c[1] = x;
		break;

	case VIPS_KERNEL_CUBIC:
		calculate_coefficients_catmull( c, x ); 
		break;

	case VIPS_KERNEL_LANCZOS2:
		calculate_coefficients_lanczos( c, 2, shrink, x ); 
		break;

	case VIPS_KERNEL_LANCZOS3:
		calculate_coefficients_lanczos( c, 3, shrink, x ); 
		break;

	default:
		g_assert_not_reached();
		break;
	}
}

Exemplo n.º 2

Arquivo: reduceh.cpp Projeto: jcupitt/libvips

/* Calculate a mask element. 
 */
void
vips_reduce_make_mask( double *c, VipsKernel kernel, double shrink, double x )
{
	switch( kernel ) {
	case VIPS_KERNEL_NEAREST:
		c[0] = 1.0;
		break;

	case VIPS_KERNEL_LINEAR:
		calculate_coefficients_triangle( c, shrink, x ); 
		break;

	case VIPS_KERNEL_CUBIC:
		/* Catmull-Rom.
		 */
		calculate_coefficients_cubic( c, shrink, x, 0.0, 0.5 );
		break;

	case VIPS_KERNEL_MITCHELL:
		calculate_coefficients_cubic( c, shrink, x, 
			1.0 / 3.0, 1.0 / 3.0 );
		break;

	case VIPS_KERNEL_LANCZOS2:
		calculate_coefficients_lanczos( c, 2, shrink, x ); 
		break;

	case VIPS_KERNEL_LANCZOS3:
		calculate_coefficients_lanczos( c, 3, shrink, x ); 
		break;

	default:
		g_assert_not_reached();
		break;
	}
}