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Tesselator: ignore non-positive clip rectangles

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Closes https://github.com/emilk/egui/issues/328
This commit is contained in:
Emil Ernerfeldt
2021-04-19 23:00:20 +02:00
parent 72d0d71d66
commit 0f1df90d90
2 changed files with 7 additions and 0 deletions
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3
emath/src/rect.rs
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@@ -304,16 +304,19 @@ impl Rect {
} }
/// `min.x <= max.x && min.y <= max.y`. /// `min.x <= max.x && min.y <= max.y`.
#[inline(always)]
pub fn is_non_negative(&self) -> bool { pub fn is_non_negative(&self) -> bool {
self.min.x <= self.max.x && self.min.y <= self.max.y self.min.x <= self.max.x && self.min.y <= self.max.y
} }
/// True if all members are also finite. /// True if all members are also finite.
#[inline(always)]
pub fn is_finite(&self) -> bool { pub fn is_finite(&self) -> bool {
self.min.is_finite() && self.max.is_finite() self.min.is_finite() && self.max.is_finite()
} }
/// True if any member is NaN. /// True if any member is NaN.
#[inline(always)]
pub fn any_nan(self) -> bool { pub fn any_nan(self) -> bool {
self.min.any_nan() || self.max.any_nan() self.min.any_nan() || self.max.any_nan()
} }

4
epaint/src/tessellator.rs
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@@ -742,6 +742,10 @@ pub fn tessellate_shapes(
let mut clipped_meshes: Vec<ClippedMesh> = Vec::default(); let mut clipped_meshes: Vec<ClippedMesh> = Vec::default();
for ClippedShape(clip_rect, shape) in shapes { for ClippedShape(clip_rect, shape) in shapes {
if !clip_rect.is_non_negative() {
continue; // skip empty clip rectangles
}
let start_new_mesh = match clipped_meshes.last() { let start_new_mesh = match clipped_meshes.last() {
None => true, None => true,
Some(cm) => cm.0 != clip_rect || cm.1.texture_id != shape.texture_id(), Some(cm) => cm.0 != clip_rect || cm.1.texture_id != shape.texture_id(),