diff options
Diffstat (limited to 'vendor/exr/examples/0c_read_rgba.rs')
| -rw-r--r-- | vendor/exr/examples/0c_read_rgba.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/vendor/exr/examples/0c_read_rgba.rs b/vendor/exr/examples/0c_read_rgba.rs new file mode 100644 index 0000000..a2126f8 --- /dev/null +++ b/vendor/exr/examples/0c_read_rgba.rs @@ -0,0 +1,30 @@ +extern crate exr; + +/// `exr` offers a few simplified functions for the most basic use cases. +/// `read_first_rgba_layer_from_file` is a such a function, which loads rgba exr files. +/// To load the pixel data, you need to specify +/// how to create and how to set the pixels of your image. +fn main() { + let image = exr::prelude::read_first_rgba_layer_from_file( + "generated_rgba.exr", + + // instantiate your image type with the size of the image in file + |resolution, _| { + let default_pixel = [0.0, 0.0, 0.0, 0.0]; + let empty_line = vec![ default_pixel; resolution.width() ]; + let empty_image = vec![ empty_line; resolution.height() ]; + empty_image + }, + + // transfer the colors from the file to your image type, + // requesting all values to be converted to f32 numbers (you can also directly use f16 instead) + // and you could also use `Sample` instead of `f32` to keep the original data type from the file + |pixel_vector, position, (r,g,b, a): (f32, f32, f32, f32)| { + pixel_vector[position.y()][position.x()] = [r, g, b, a] + }, + + ).expect("run the `1_write_rgba` example to generate the required file"); + + // printing all pixels might kill the console, so only print some meta data about the image + println!("opened file generated_rgba.exr: {:#?}", image.layer_data.attributes); +}
\ No newline at end of file |