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Make fill() draw uncovered pixels as (0,0,0,0) for certain composition ops

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This commit is contained in:
pylbrecht 2019-11-30 21:21:07 +01:00
parent 4d4e68ca6b
commit 47ee2729ec
1 changed files with 42 additions and 7 deletions
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39
components/canvas/raqote_backend.rs
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@ -310,7 +310,12 @@ impl GenericDrawTarget for raqote::DrawTarget {
), ),
); );
self.fill(&pb.finish(), &source, draw_options.as_raqote()); GenericDrawTarget::fill(
self,
&Path::Raqote(pb.finish()),
Pattern::Raqote(source),
draw_options,
);
} }
fn draw_surface_with_shadow( fn draw_surface_with_shadow(
&self, &self,
@ -324,11 +329,36 @@ impl GenericDrawTarget for raqote::DrawTarget {
warn!("no support for drawing shadows"); warn!("no support for drawing shadows");
} }
fn fill(&mut self, path: &Path, pattern: Pattern, draw_options: &DrawOptions) { fn fill(&mut self, path: &Path, pattern: Pattern, draw_options: &DrawOptions) {
match draw_options.as_raqote().blend_mode {
raqote::BlendMode::Src => {
self.clear(raqote::SolidSource::from_unpremultiplied_argb(0, 0, 0, 0));
self.fill( self.fill(
path.as_raqote(), path.as_raqote(),
pattern.as_raqote(), pattern.as_raqote(),
draw_options.as_raqote(), draw_options.as_raqote(),
); );
},
raqote::BlendMode::DstIn |
raqote::BlendMode::DstAtop |
raqote::BlendMode::SrcIn |
raqote::BlendMode::SrcOut => {
self.push_layer(1.);
self.clear(raqote::SolidSource::from_unpremultiplied_argb(0, 0, 0, 0));
self.fill(
path.as_raqote(),
pattern.as_raqote(),
draw_options.as_raqote(),
);
self.pop_layer();
},
_ => {
self.fill(
path.as_raqote(),
pattern.as_raqote(),
draw_options.as_raqote(),
);
},
}
} }
fn fill_rect( fn fill_rect(
&mut self, &mut self,
@ -349,7 +379,12 @@ impl GenericDrawTarget for raqote::DrawTarget {
raqote::DrawOptions::new() raqote::DrawOptions::new()
}; };
raqote::DrawTarget::fill(self, &pb.finish(), pattern.as_raqote(), &draw_options); GenericDrawTarget::fill(
self,
&Path::Raqote(pb.finish()),
pattern,
&DrawOptions::Raqote(draw_options),
);
} }
fn get_format(&self) -> SurfaceFormat { fn get_format(&self) -> SurfaceFormat {
SurfaceFormat::Raqote(()) SurfaceFormat::Raqote(())