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Fix transform logic for mask node (#1134)

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Fix transform logic for mask node + other fixes

* Fixes the transform logic for the mask node reverting the breakage
introduced by the color pr

* Actually modifies the pixel values

* Fix storage format for images

* Export images as unassociated alpha
This commit is contained in:
Dennis Kobert
2023-04-16 10:15:58 +02:00
committed by Keavon Chambers
parent 37b892a516
commit ce5b73598c
3 changed files with 15 additions and 10 deletions
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7
node-graph/gstd/src/raster.rs
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@@ -239,17 +239,18 @@ fn mask_image<
}
// Transforms a point from the background image to the forground image
let bg_to_fg = DAffine2::from_scale(mask_size) * stencil.transform().inverse() * image.transform() * DAffine2::from_scale(1. / image_size);
let bg_to_fg = image.transform() * DAffine2::from_scale(1. / image_size);
for y in 0..image.height() {
for x in 0..image.width() {
let image_point = DVec2::new(x as f64, y as f64);
let mut mask_point = bg_to_fg.transform_point2(image_point);
mask_point = mask_point.clamp(DVec2::ZERO, mask_size);
let local_mask_point = stencil.transform().inverse().transform_point2(mask_point);
mask_point = stencil.transform().transform_point2(local_mask_point.clamp(DVec2::ZERO, DVec2::ONE));
let image_pixel = image.get_pixel_mut(x as u32, y as u32).unwrap();
if let Some(mask_pixel) = stencil.sample(mask_point) {
image_pixel.multiply_alpha(mask_pixel.l().to_channel());
*image_pixel = image_pixel.multiplied_alpha(mask_pixel.l().to_channel());
}
}
}