diff options
Diffstat (limited to 'vendor/exr/examples/5c_write_mip_maps.rs')
| -rw-r--r-- | vendor/exr/examples/5c_write_mip_maps.rs | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/vendor/exr/examples/5c_write_mip_maps.rs b/vendor/exr/examples/5c_write_mip_maps.rs new file mode 100644 index 0000000..1096c4e --- /dev/null +++ b/vendor/exr/examples/5c_write_mip_maps.rs @@ -0,0 +1,73 @@ + +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"); +}
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