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use drawing_api::{Fonts, PixelPoint, PixelRect, PixelSize, Texture};
use crate::{PathElement, Primitive};
use super::{clip_line, clip_rect};
pub trait Clipping<T: Texture> {
fn clip(self, rect: PixelRect) -> Self;
}
impl<T: Texture, F: Fonts> Clipping<T> for Vec<Primitive<T, F>> {
fn clip(self, clipping_rect: PixelRect) -> Self {
let mut res = Vec::new();
let mut need_scissors = false;
for primitive in self.into_iter() {
match primitive {
Primitive::Clear { color } => {
res.push(Primitive::Rectangle {
color: color,
rect: clipping_rect,
});
}
Primitive::Line {
color,
thickness,
start_point,
end_point,
} => {
if let Some(clipped) = clip_line(
start_point.x,
start_point.y,
end_point.x,
end_point.y,
clipping_rect.origin.x,
clipping_rect.origin.y,
clipping_rect.size.width,
clipping_rect.size.height,
) {
res.push(Primitive::Line {
color,
thickness,
start_point: PixelPoint::new(clipped.0, clipped.1),
end_point: PixelPoint::new(clipped.2, clipped.3),
});
}
}
Primitive::Rectangle { color, rect } => {
if let Some(clipped) = clip_rect(
rect.origin.x,
rect.origin.y,
rect.size.width,
rect.size.height,
clipping_rect.origin.x,
clipping_rect.origin.y,
clipping_rect.size.width,
clipping_rect.size.height,
) {
res.push(Primitive::Rectangle {
color,
rect: PixelRect::new(
PixelPoint::new(clipped.0, clipped.1),
PixelSize::new(clipped.2, clipped.3),
),
});
}
}
Primitive::Image { texture, rect, src } => {
if let Some(clipped) = clip_rect(
rect.origin.x,
rect.origin.y,
rect.size.width,
rect.size.height,
clipping_rect.origin.x,
clipping_rect.origin.y,
clipping_rect.size.width,
clipping_rect.size.height,
) {
res.push(Primitive::Image {
texture,
rect: PixelRect::new(
PixelPoint::new(clipped.0, clipped.1),
PixelSize::new(clipped.2, clipped.3),
),
src: PixelRect::new(
PixelPoint::new(
clipped.0 - rect.origin.x + src.origin.x,
clipped.1 - rect.origin.y + src.origin.y,
),
PixelSize::new(clipped.2, clipped.3),
),
});
}
}
Primitive::Text {
fonts,
family_name,
size,
color,
position,
clipping_rect: rect,
text,
} => {
let clipped = if let Some(rect) = rect {
clip_rect(
rect.origin.x,
rect.origin.y,
rect.size.width,
rect.size.height,
clipping_rect.origin.x,
clipping_rect.origin.y,
clipping_rect.size.width,
clipping_rect.size.height,
)
} else {
Some((
clipping_rect.origin.x,
clipping_rect.origin.y,
clipping_rect.size.width,
clipping_rect.size.height,
))
};
if let Some(clipped) = clipped {
res.push(Primitive::Text {
fonts: fonts.clone(),
family_name,
size,
color,
position,
clipping_rect: Some(PixelRect::new(
PixelPoint::new(clipped.0, clipped.1),
PixelSize::new(clipped.2, clipped.3),
)),
text,
});
}
}
Primitive::Stroke {
path,
thickness,
brush,
} => {
need_scissors = true;
res.push(Primitive::Stroke {
path,
thickness,
brush,
});
/*let clipped_path = path.clip(clipping_rect);
if clipped_path.len() > 0 {
res.push(Primitive::Stroke {
path: clipped_path,
thickness,
brush,
})
}*/
}
Primitive::StrokeStyled {
path,
thickness,
brush,
style,
} => {
need_scissors = true;
res.push(Primitive::StrokeStyled {
path,
thickness,
brush,
style,
})
/*let clipped_path = path.clip(clipping_rect);
if clipped_path.len() > 0 {
res.push(Primitive::StrokeStyled {
path: clipped_path,
thickness,
brush,
style,
})
}*/
}
Primitive::Fill { path, brush } => {
need_scissors = true;
res.push(Primitive::Fill { path, brush });
/*let clipped_path = path.clip(clipping_rect);
if clipped_path.len() > 0 {
res.push(Primitive::Fill {
path: clipped_path,
brush,
})
}*/
}
Primitive::ClipRect { rect, primitives } => {
res.push(Primitive::ClipRect { rect, primitives })
}
Primitive::ClipPath { path, primitives } => {
res.push(Primitive::ClipPath { path, primitives })
}
Primitive::Transform {
transform,
primitives,
} => res.push(Primitive::Transform {
transform,
primitives,
}),
Primitive::Composite { color, primitives } => {
let clipped_primitives = primitives.clip(clipping_rect);
if !clipped_primitives.is_empty() {
res.push(Primitive::Composite {
color,
primitives: clipped_primitives,
})
}
}
}
}
if need_scissors {
vec![Primitive::ClipRect {
rect: clipping_rect,
primitives: res,
}]
} else {
res
}
}
}
impl<T: Texture> Clipping<T> for Vec<PathElement> {
fn clip(self, _clipping_rect: PixelRect) -> Self {
let mut res = Vec::new();
for path_element in self.into_iter() {
// TODO: implement!
res.push(path_element);
}
res
}
}