diff options
Diffstat (limited to 'graphics/src/gradient.rs')
-rw-r--r-- | graphics/src/gradient.rs | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/graphics/src/gradient.rs b/graphics/src/gradient.rs index 3e88d9de..86d14b6c 100644 --- a/graphics/src/gradient.rs +++ b/graphics/src/gradient.rs @@ -23,6 +23,15 @@ impl From<Linear> for Gradient { } } +impl Gradient { + /// Packs the [`Gradient`] for use in shader code. + pub fn pack(&self) -> [f32; 44] { + match self { + Gradient::Linear(linear) => linear.pack(), + } + } +} + /// A linear gradient that can be used in the style of [`Fill`] or [`Stroke`]. /// /// [`Fill`]: crate::geometry::Fill; @@ -85,4 +94,28 @@ impl Linear { self } + + /// Packs the [`Gradient`] for use in shader code. + pub fn pack(&self) -> [f32; 44] { + let mut pack: [f32; 44] = [0.0; 44]; + + for (index, stop) in self.stops.iter().enumerate() { + let [r, g, b, a] = + stop.map_or(Color::default(), |s| s.color).into_linear(); + + pack[index * 4] = r; + pack[(index * 4) + 1] = g; + pack[(index * 4) + 2] = b; + pack[(index * 4) + 3] = a; + + pack[32 + index] = stop.map_or(2.0, |s| s.offset); + } + + pack[40] = self.start.x; + pack[41] = self.start.y; + pack[42] = self.end.x; + pack[43] = self.end.y; + + pack + } } |