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Diffstat (limited to 'vendor/exr/examples/2_rgba_adjust_exposure.rs')
| -rw-r--r-- | vendor/exr/examples/2_rgba_adjust_exposure.rs | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/vendor/exr/examples/2_rgba_adjust_exposure.rs b/vendor/exr/examples/2_rgba_adjust_exposure.rs deleted file mode 100644 index c4e6097..0000000 --- a/vendor/exr/examples/2_rgba_adjust_exposure.rs +++ /dev/null @@ -1,80 +0,0 @@ - -// exr imports -extern crate exr; - -/// Read an rgba image, increase the exposure, and then write it back. -/// Uses multi-core compression where appropriate. -/// -/// All non-rgba channels and all layers except the first rgba layers will not be present in the new file. -fn main() { - use exr::prelude::*; - - /// This is an example of a custom image type. - /// You use your own image struct here. - // This struct trades sub-optimal memory-efficiency for clarity, - // because this is an example, and does not have to be perfectly efficient. - #[derive(Debug, PartialEq)] - struct CustomPixels { lines: Vec<Vec<RgbaF32Pixel>> } - type RgbaF32Pixel = (f32, f32, f32, f32); - - // read the image from a file - let mut image = read().no_deep_data() - .largest_resolution_level() - .rgba_channels( - // create our custom image based on the file info - |resolution, _channels| -> CustomPixels { - let default_rgba_pixel = (0.0, 0.0, 0.0, 0.0); - let default_line = vec![default_rgba_pixel; resolution.width()]; - let lines = vec![default_line; resolution.height()]; - CustomPixels { lines } - }, - - // request pixels with red, green, blue, and optionally and alpha values. - // transfer each pixel from the file to our image - |image, position, (r,g,b,a): RgbaF32Pixel| { - - // insert the values into our custom image - image.lines[position.y()][position.x()] = (r,g,b,a); - } - ) - .first_valid_layer() - .all_attributes() - .from_file("generated_rgba.exr") - .expect("run the `1_write_rgba` example to generate the required file"); - - let exposure_multiplier = 2.0; - - { // increase exposure of all pixels - for line in &mut image.layer_data.channel_data.pixels.lines { - for (r,g,b,_) in line { - // you should probably check the color space and white points - // for high quality color adjustments - *r *= exposure_multiplier; - *g *= exposure_multiplier; - *b *= exposure_multiplier; - } - } - - // also update meta data after modifying the image - if let Some(exposure) = &mut image.layer_data.attributes.exposure { - println!("increased exposure from {}s to {}s", exposure, *exposure * exposure_multiplier); - *exposure *= exposure_multiplier; - } - } - - // enable writing our custom pixel storage to a file - // FIXME this should be passed as a closure to the `write_with(|x| y)` call - impl GetPixel for CustomPixels { - type Pixel = RgbaF32Pixel; - fn get_pixel(&self, position: Vec2<usize>) -> Self::Pixel { - self.lines[position.y()][position.x()] - } - } - - // write the image to a file - image - .write().to_file("rgba_exposure_adjusted.exr") - .unwrap(); - - println!("created file rgba_exposure_adjusted.exr"); -}
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