30 lines
1.4 KiB
Rust
30 lines
1.4 KiB
Rust
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extern crate exr;
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/// `exr` offers a few simplified functions for the most basic use cases.
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/// `read_first_rgba_layer_from_file` is a such a function, which loads rgba exr files.
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/// To load the pixel data, you need to specify
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/// how to create and how to set the pixels of your image.
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fn main() {
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let image = exr::prelude::read_first_rgba_layer_from_file(
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"generated_rgba.exr",
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// instantiate your image type with the size of the image in file
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|resolution, _| {
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let default_pixel = [0.0, 0.0, 0.0, 0.0];
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let empty_line = vec![ default_pixel; resolution.width() ];
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let empty_image = vec![ empty_line; resolution.height() ];
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empty_image
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},
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// transfer the colors from the file to your image type,
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// requesting all values to be converted to f32 numbers (you can also directly use f16 instead)
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// and you could also use `Sample` instead of `f32` to keep the original data type from the file
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|pixel_vector, position, (r,g,b, a): (f32, f32, f32, f32)| {
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pixel_vector[position.y()][position.x()] = [r, g, b, a]
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},
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).expect("run the `1_write_rgba` example to generate the required file");
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// printing all pixels might kill the console, so only print some meta data about the image
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println!("opened file generated_rgba.exr: {:#?}", image.layer_data.attributes);
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}
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