Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 49 insertions, 0 deletions

diff --git a/vendor/exr/examples/4b_read_custom_fixed_channels.rs b/vendor/exr/examples/4b_read_custom_fixed_channels.rs
new file mode 100644
index 0000000..a5fd273
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+++ b/vendor/exr/examples/4b_read_custom_fixed_channels.rs
@@ -0,0 +1,49 @@
+
+// exr imports
+extern crate exr;
+
+/// Read an image and print information about the image into the console.
+/// This example shows how to read an image with multiple layers and specific channels.
+/// This example does not include resolution levels (mipmaps or ripmaps).
+fn main() {
+    use exr::prelude::*;
+
+    let image = read().no_deep_data()
+        .largest_resolution_level()
+
+        .specific_channels()
+        .optional("A", f16::ONE)
+        .required("Y") // TODO also accept a closure with a detailed selection mechanism
+        .optional("right.Y", 0.0)
+        .collect_pixels(
+            |resolution, (a_channel, y_channel, y_right_channel)| {
+                println!("image contains alpha channel? {}", a_channel.is_some());
+                println!("image contains stereoscopic luma channel? {}", y_right_channel.is_some());
+                println!("the type of luma samples is {:?}", y_channel.sample_type);
+
+                vec![vec![(f16::ZERO, 0.0, 0.0); resolution.width()]; resolution.height()]
+            },
+
+            // all samples will be converted to f32 (you can also use the enum `Sample` instead of `f32` here to retain the original data type from the file)
+            |vec, position, (a,y,yr): (f16, f32, f32)| {
+                vec[position.y()][position.x()] = (a, y, yr)
+            }
+        )
+
+        .all_layers()
+        .all_attributes()
+        .on_progress(|progress| println!("progress: {:.1}", progress*100.0))
+        .from_file("custom_channels.exr")
+        .expect("run example `4_write_custom_fixed_channels` to generate this image file");
+
+    // output a random color of each channel of each layer
+    for layer in &image.layer_data {
+        let (alpha, luma, luma_right) = layer.channel_data.pixels.first().unwrap().first().unwrap();
+
+        println!(
+            "top left color of layer `{}`: (a, y, yr) = {:?}",
+            layer.attributes.layer_name.clone().unwrap_or_default(),
+            (alpha.to_f32(), luma, luma_right)
+        )
+    }
+}
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