euv_engine/renderer/
enum.rs

1/// Defines how new pixels are composited with existing pixels on the canvas.
2///
3/// Maps directly to the CSS `globalCompositeOperation` property.
4#[derive(Clone, Copy, Debug, Default, Eq, Hash, PartialEq)]
5pub enum BlendMode {
6    /// The source is drawn over the destination (default alpha blending).
7    #[default]
8    Normal,
9    /// The source color is multiplied with the destination, producing a darker result.
10    Multiply,
11    /// The source and destination are inverted, multiplied, then inverted again.
12    Screen,
13    /// The source and destination colors are added together, clamped to maximum brightness.
14    Lighter,
15    /// Combines `Multiply` and `Screen` based on the destination color.
16    Overlay,
17    /// Keeps the darker of the source and destination per channel.
18    Darken,
19    /// Keeps the lighter of the source and destination per channel.
20    Lighten,
21    /// Dodges the destination color brightening it based on the source.
22    ColorDodge,
23    /// Burns the destination color darkening it based on the source.
24    ColorBurn,
25    /// A harsher version of `Overlay` using the source color as the filter.
26    HardLight,
27    /// A softer version of `Overlay` using the source color as the filter.
28    SoftLight,
29    /// Subtracts the darker color from the lighter color per channel.
30    Difference,
31    /// Similar to `Difference` but with lower contrast.
32    Exclusion,
33    /// Uses the hue of the source with the saturation and luminosity of the destination.
34    Hue,
35    /// Uses the saturation of the source with the hue and luminosity of the destination.
36    Saturation,
37    /// Uses the hue and saturation of the source with the luminosity of the destination.
38    Color,
39    /// Uses the luminosity of the source with the hue and saturation of the destination.
40    Luminosity,
41}
42
43/// Rendering quality preset controlling anti-aliasing smoothing strategy.
44///
45/// Maps to the canvas `imageSmoothingQuality` value plus an explicit
46/// `imageSmoothingEnabled` toggle. Combined with a CSS `image-rendering:
47/// pixelated` rule on the consumer side, `Low` produces crisp pixel-art
48/// rendering while `High` produces smooth vector-style rendering.
49#[derive(Clone, Copy, Debug, Default, Eq, Hash, PartialEq)]
50pub enum RenderQuality {
51    /// Fastest rendering, pixelated scaling.
52    ///
53    /// Disables `imageSmoothingEnabled` on the canvas context and sets
54    /// `imageSmoothingQuality = "low"`. Pair with CSS `image-rendering:
55    /// pixelated` for sharp nearest-neighbour scaling.
56    Low,
57    /// Balanced rendering with default smoothing quality.
58    ///
59    /// Sets `imageSmoothingQuality = "medium"`.
60    Medium,
61    /// Highest fidelity rendering with smooth edges and high-quality scaling.
62    ///
63    /// Sets `imageSmoothingQuality = "high"`. Best for vector-style content
64    /// on HiDPI displays. This is the default — when no explicit quality is
65    /// requested, the engine errs on the side of visual fidelity rather than
66    /// performance, since users typically notice aliasing artifacts before
67    /// they notice a few extra milliseconds of GPU time.
68    #[default]
69    High,
70}
euv_engine/renderer/enum.rs

euv_engine/renderer/
enum.rs
