alex/vello
1
0
Fork 0
mirror of https://github.com/italicsjenga/vello.git synced 2025-01-08 20:01:30 +11:00
Code Issues Packages Projects Releases Wiki Activity

Fix brush transforms

Browse source 
This fixes an incorrect application of the inverse transform for radial gradients in fine.

Also fixes an edge case in `SceneBuilder` where a brush transform is identical to the path transform leading to a corrupt encoding.
This commit is contained in:
Chad Brokaw 2023-02-22 20:10:00 -05:00
parent 0bb519c1ba
commit 033870d91e
3 changed files with 22 additions and 14 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
shader/fine.wgsl
View file

@ -251,7 +251,7 @@ fn main(
for (var i = 0u; i < PIXELS_PER_THREAD; i += 1u) {
let my_xy = vec2(xy.x + f32(i), xy.y);
// TODO: can hoist y, but for now stick to the GLSL version
let xy_xformed = rad.matrx.xz * my_xy.x + rad.matrx.yw * my_xy.y - rad.xlat;
let xy_xformed = rad.matrx.xy * my_xy.x + rad.matrx.zw * my_xy.y - rad.xlat;
let ba = dot(xy_xformed, rad.c1);
let ca = rad.ra * dot(xy_xformed, xy_xformed);
let t = sqrt(ba * ba + ca) - ba - rad.roff;

8
src/encoding/encoding.rs
View file

@ -120,10 +120,16 @@ impl Encoding {
}
/// Encodes a transform.
pub fn encode_transform(&mut self, transform: Transform) {
///
/// If the given transform is different from the current one, encodes it an
/// returns true. Otherwise, encodes nothing and returns false.
pub fn encode_transform(&mut self, transform: Transform) -> bool {
if self.transforms.last() != Some(&transform) {
self.path_tags.push(PathTag::TRANSFORM);
self.transforms.push(transform);
true
} else {
false
}
}

26
src/scene.rs
View file

@ -140,13 +140,14 @@ impl<'a> SceneBuilder<'a> {
});
if self.scene.encode_shape(shape, true) {
if let Some(brush_transform) = brush_transform {
self.scene
.encode_transform(Transform::from_kurbo(&(transform * brush_transform)));
self.scene.swap_last_path_tags();
self.scene.encode_brush(brush, 1.0);
} else {
self.scene.encode_brush(brush, 1.0);
if self
.scene
.encode_transform(Transform::from_kurbo(&(transform * brush_transform)))
{
self.scene.swap_last_path_tags();
}
}
self.scene.encode_brush(brush, 1.0);
}
}
@ -164,13 +165,14 @@ impl<'a> SceneBuilder<'a> {
self.scene.encode_linewidth(style.width);
if self.scene.encode_shape(shape, false) {
if let Some(brush_transform) = brush_transform {
self.scene
.encode_transform(Transform::from_kurbo(&(transform * brush_transform)));
self.scene.swap_last_path_tags();
self.scene.encode_brush(brush, 1.0);
} else {
self.scene.encode_brush(brush, 1.0);
if self
.scene
.encode_transform(Transform::from_kurbo(&(transform * brush_transform)))
{
self.scene.swap_last_path_tags();
}
}
self.scene.encode_brush(brush, 1.0);
}
}