1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
use strict;
use warnings;
use FFI::C;
package ColorValue {
FFI::C->struct([
red => 'uint8',
green => 'uint8',
blue => 'uint8',
]);
}
package NamedColor {
FFI::C->struct([
name => 'string(22)',
value => 'color_value_t',
]);
}
package ArrayNamedColor {
FFI::C->array(['named_color_t' => 4]);
};
my $array = ArrayNamedColor->new([
{ name => "red", value => { red => 255 } },
{ name => "green", value => { green => 255 } },
{ name => "blue", value => { blue => 255 } },
{ name => "purple", value => { red => 255,
blue => 255 } },
]);
# dim each color by 1/2
foreach my $color (@$array)
{
$color->value->red ( $color->value->red / 2 );
$color->value->green( $color->value->green / 2 );
$color->value->blue ( $color->value->blue / 2 );
}
# print out the colors
foreach my $color (@$array)
{
printf "%s [%02x %02x %02x]\n",
$color->name,
$color->value->red,
$color->value->green,
$color->value->blue;
}
package AnyInt {
FFI::C->union([
u8 => 'uint8',
u16 => 'uint16',
u32 => 'uint32',
u64 => 'uint64',
]);
}
my $int = AnyInt->new({ u8 => 42 });
print $int->u32;
|
