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
62
63
64
65
66
67
68
69
70
71
72
73
|
extern crate smallvec;
extern crate rand;
extern crate half;
// exr imports
extern crate exr;
/// Writes two layers, each with multiple mip maps.
/// All mip maps have solid color for brevity.
fn main() {
use exr::prelude::*;
use exr::math::RoundingMode;
use smallvec::smallvec;
let full_size = Vec2(512, 512);
let size_rounding = RoundingMode::Up;
let mip_levels_sizes = exr::meta::mip_map_levels(
size_rounding, full_size
).collect::<Vec<_>>();
let red_mip_levels = mip_levels_sizes.iter()
.map(|(_index, level_size)|{
FlatSamples::F32(vec![0.1_f32; level_size.area() ])
})
.collect();
let green_mip_levels = mip_levels_sizes.iter()
.map(|(_index, level_size)|{
FlatSamples::F32(vec![0.6_f32; level_size.area() ])
})
.collect();
let blue_mip_levels = mip_levels_sizes.iter()
.map(|(_index, level_size)|{
FlatSamples::F32(vec![1.0_f32; level_size.area() ])
})
.collect();
let rgb_mip_maps = AnyChannels::sort(smallvec![
AnyChannel::new("R", Levels::Mip { level_data: red_mip_levels, rounding_mode: size_rounding }),
AnyChannel::new("G", Levels::Mip { level_data: green_mip_levels, rounding_mode: size_rounding }),
AnyChannel::new("B", Levels::Mip { level_data: blue_mip_levels, rounding_mode: size_rounding }),
]);
let layer1 = Layer::new(
full_size,
LayerAttributes::named("teal rgb"),
Encoding::FAST_LOSSLESS,
rgb_mip_maps
);
let mut layer2 = layer1.clone();
layer2.attributes.layer_name = Some("Copied Layer".into());
layer2.encoding = Encoding::SMALL_FAST_LOSSLESS;
// define the visible area of the canvas
let image_attributes = ImageAttributes::new(
IntegerBounds::from_dimensions(full_size)
);
let image = Image::empty(image_attributes)
.with_layer(layer1).with_layer(layer2);
println!("writing image...");
image.write().to_file("mip_maps.exr").unwrap();
println!("created file mip_maps.exr");
}
|
