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Downscale Images to document resolution (#1077)

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* Add DownscaleNode

* Add lambda (call argument) input type + fix caching

* Add comment explaining Lambda input

* Automatically insert cache node after downscale node

* Implement sparse hashing of images
This commit is contained in:
Dennis Kobert
2023-03-15 12:49:56 +01:00
committed by GitHub
parent a14af91031
commit d8de17b96f
13 changed files with 209 additions and 224 deletions
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27
node-graph/gcore/src/raster.rs
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@@ -329,10 +329,9 @@ mod image {
use alloc::vec::Vec;
use core::hash::{Hash, Hasher};
use dyn_any::{DynAny, StaticType};
use glam::DAffine2;
use glam::DVec2;
use glam::{DAffine2, DVec2};
#[derive(Clone, Debug, PartialEq, DynAny, Default, specta::Type, Hash)]
#[derive(Clone, Debug, PartialEq, DynAny, Default, specta::Type)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct Image {
pub width: u32,
@@ -340,6 +339,17 @@ mod image {
pub data: Vec<Color>,
}
impl Hash for Image {
fn hash<H: Hasher>(&self, state: &mut H) {
const HASH_SAMPLES: usize = 1000;
self.width.hash(state);
self.height.hash(state);
for i in 0..HASH_SAMPLES.min(self.data.len()) {
self.data[i * self.data.len() / HASH_SAMPLES].hash(state);
}
}
}
impl Image {
pub const fn empty() -> Self {
Self {
@@ -362,7 +372,7 @@ mod image {
}
/// Flattens each channel cast to a u8
pub fn as_flat_u8(self) -> (Vec<u8>, u32, u32) {
pub fn into_flat_u8(self) -> (Vec<u8>, u32, u32) {
let Image { width, height, data } = self;
let result_bytes = data.into_iter().flat_map(|color| color.to_rgba8()).collect();
@@ -431,11 +441,12 @@ mod image {
&mut self.image.data[y * (self.image.width as usize) + x]
}
pub fn sample(&self, x: f64, y: f64) -> Color {
let x = x.clamp(0.0, self.image.width as f64 - 1.0) as usize;
let y = y.clamp(0.0, self.image.height as f64 - 1.0) as usize;
/// Clamps the provided point to (0, 0) (ImageSize) and returns the closest pixel
pub fn sample(&self, position: DVec2) -> Color {
let x = position.x.clamp(0., self.image.width as f64 - 1.) as usize;
let y = position.y.clamp(0., self.image.height as f64 - 1.) as usize;
self.image.data[y * (self.image.width as usize) + x]
self.image.data[x + y * self.image.width as usize]
}
}