C++ (Cpp) vips_reduce Examples

Example #1

File: similarity.c Project: everbox/libvips

static int
vips_similarity_build( VipsObject *object )
{
	VipsResample *resample = VIPS_RESAMPLE( object );
	VipsSimilarity *similarity = (VipsSimilarity *) object;

	VipsImage **t = (VipsImage **) 
		vips_object_local_array( object, 4 );

	if( VIPS_OBJECT_CLASS( vips_similarity_parent_class )->build( object ) )
		return( -1 );

	/* Use vips_reduce(), if we can.
	 */
	if( similarity->interpolate && 
		strcmp( VIPS_OBJECT_GET_CLASS( similarity->interpolate )->
			nickname, "bicubic" ) == 0 &&
		similarity->angle == 0.0 &&
		similarity->idx == 0.0 &&
		similarity->idy == 0.0 &&
		similarity->odx == 0.0 &&
		similarity->ody == 0.0 ) {
		if( vips_reduce( resample->in, &t[0], 
			1.0 / similarity->scale, 
			1.0 / similarity->scale, NULL ) )  
			return( -1 );
	}
	else {
		double a = similarity->scale * 
			cos( VIPS_RAD( similarity->angle ) ); 
		double b = similarity->scale * 
			-sin( VIPS_RAD( similarity->angle ) );
		double c = -b;
		double d = a;

		if( vips_affine( resample->in, &t[0], a, b, c, d, 
			"interpolate", similarity->interpolate,
			"odx", similarity->odx,
			"ody", similarity->ody,
			"idx", similarity->idx,
			"idy", similarity->idy,
			NULL ) )
			return( -1 );
	}

	if( vips_image_write( t[0], resample->out ) )
		return( -1 ); 

	return( 0 );
}

Example #2

File: similarity.c Project: ChiaraCaiazza/collageMaker

static int
vips_similarity_build( VipsObject *object )
{
	VipsResample *resample = VIPS_RESAMPLE( object );
	VipsSimilarity *similarity = (VipsSimilarity *) object;
	VipsImage **t = (VipsImage **) 
		vips_object_local_array( object, 4 );

	gboolean handled;

	if( VIPS_OBJECT_CLASS( vips_similarity_parent_class )->build( object ) )
		return( -1 );

	handled = FALSE;

	/* Use vips_reduce(), if we can.
	 */
	if( similarity->interpolate &&
		similarity->angle == 0.0 &&
		similarity->idx == 0.0 &&
		similarity->idy == 0.0 &&
		similarity->odx == 0.0 &&
		similarity->ody == 0.0 ) {
		const char *nickname = VIPS_OBJECT_GET_CLASS( 
			similarity->interpolate )->nickname;

		int i; 

		for( i = 0; i < VIPS_NUMBER( vips_similarity_kernel ); i++ ) {
			VipsInterpolateKernel *ik = &vips_similarity_kernel[i];

			if( strcmp( nickname, ik->nickname ) == 0 ) {
				if( vips_reduce( resample->in, &t[0], 
					1.0 / similarity->scale, 
					1.0 / similarity->scale, 
					"kernel", ik->kernel,
					NULL ) )
					return( -1 );

				handled = TRUE;
				break;
			}
		}
	}

	if( !handled ) { 
		double a = similarity->scale * 
			cos( VIPS_RAD( similarity->angle ) ); 
		double b = similarity->scale * 
			-sin( VIPS_RAD( similarity->angle ) );
		double c = -b;
		double d = a;

		if( vips_affine( resample->in, &t[0], a, b, c, d, 
			"interpolate", similarity->interpolate,
			"odx", similarity->odx,
			"ody", similarity->ody,
			"idx", similarity->idx,
			"idy", similarity->idy,
			NULL ) )
			return( -1 );
	}

	if( vips_image_write( t[0], resample->out ) )
		return( -1 ); 

	return( 0 );
}