Ejemplo n.º 1
0
Archivo: type.c Proyecto: alon/libvips
/**
 * vips_value_set_array: 
 * @value: (out): %GValue to set
 * @n: number of elements 
 * @type: the type of each element 
 * @sizeof_type: the sizeof each element 
 *
 * Set @value to be an array of things. 
 *
 * This allocates memory but does not 
 * initialise the contents: get the pointer and write instead.
 */
void
vips_value_set_array( GValue *value, int n, GType type, size_t sizeof_type )
{
	VipsArea *area;

	area = vips_area_new_array( type, sizeof_type, n );
	g_value_set_boxed( value, area );
	vips_area_unref( area );
}
Ejemplo n.º 2
0
Archivo: type.c Proyecto: alon/libvips
/**
 * vips_array_double_new:
 * @array: (array length=n): array of double
 * @n: number of doubles
 *
 * Allocate a new array of doubles and copy @array into it. Free with
 * vips_area_unref().
 *
 * See also: #VipsArea.
 *
 * Returns: (transfer full): A new #VipsArrayDouble.
 */
VipsArrayDouble *
vips_array_double_new( const double *array, int n )
{
	VipsArea *area;
	double *array_copy;

	printf( "hello, world!\n" );

	area = vips_area_new_array( G_TYPE_DOUBLE, sizeof( double ), n );
	array_copy = vips_area_get_data( area, NULL, NULL, NULL, NULL );
	memcpy( array_copy, array, n * sizeof( double ) );

	return( area );
}
Ejemplo n.º 3
0
static int
write_blank( VipsForeignSaveDz *dz )
{
	VipsImage *x, *t;
	int n;
	VipsArea *ones;
	double *d;
	int i;
	void *buf;
	size_t len;
	GsfOutput *out; 

	if( vips_black( &x, dz->tile_size, dz->tile_size, NULL ) ) 
		return( -1 );

	vips_area_get_data( (VipsArea *) dz->background, NULL, &n, NULL, NULL );
	ones = vips_area_new_array( G_TYPE_DOUBLE, sizeof( double ), n );
	d = (double *) vips_area_get_data( ones, NULL, NULL, NULL, NULL );
	for( i = 0; i < n; i++ )
		d[i] = 1.0; 
	if( vips_linear( x, &t, 
		d, 
		(double *) vips_area_get_data( (VipsArea *) dz->background, 
			NULL, NULL, NULL, NULL ),
		n, NULL ) ) {
		vips_area_unref( ones );
		g_object_unref( x );
		return( -1 );
	}
	vips_area_unref( ones );
	g_object_unref( x );
	x = t;

	if( vips_pngsave_buffer( x, &buf, &len, NULL ) ) {
		g_object_unref( x );
		return( -1 );
	}
	g_object_unref( x );

	out = vips_gsf_path( dz->tree, "blank.png", NULL ); 
	gsf_output_write( out, len, buf );
	gsf_output_close( out );
	g_object_unref( out );

	g_free( buf );

	return( 0 );
}