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examples: Check for cairo::Context::{save,restore}() failing

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This commit is contained in:
Sebastian Dröge 2021-01-31 11:01:47 +02:00
parent fb55cdfeff
commit 86cc982982
2 changed files with 6 additions and 6 deletions
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8
examples/src/bin/overlay-composition.rs
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@ -183,10 +183,10 @@ fn create_pipeline() -> Result<gst::Pipeline, Error> {
let cr = cairo::Context::new(&surface);
cr.save();
cr.save().expect("Failed to save state");
cr.set_operator(cairo::Operator::Clear);
cr.paint();
cr.restore();
cr.restore().expect("Failed to restore state");
// The image we draw (the text) will be static, but we will change the
// transformation on the drawing context, which rotates and shifts everything
@ -207,7 +207,7 @@ fn create_pipeline() -> Result<gst::Pipeline, Error> {
// with this, we push our current transformation onto this stack - allowing us
// to make temporary changes / render something / and then returning to the
// previous transformations.
cr.save();
cr.save().expect("Failed to save state");
let angle = (360. * f64::from(i)) / 10.0;
let red = (1.0 + f64::cos((angle - 60.0) * PI / 180.0)) / 2.0;
@ -231,7 +231,7 @@ fn create_pipeline() -> Result<gst::Pipeline, Error> {
// Here we go one step up in our stack of transformations, removing any
// changes we did to them since the last call to cr.save();
cr.restore();
cr.restore().expect("Failed to restore state");
}
// Safety: The surface still owns a mutable reference to the buffer but our reference

4
examples/src/bin/pango-cairo.rs
View file

@ -167,7 +167,7 @@ fn create_pipeline() -> Result<gst::Pipeline, Error> {
// with this, we push our current transformation onto this stack - allowing us
// to make temporary changes / render something / and then returning to the
// previous transformations.
cr.save();
cr.save().expect("Failed to save state");
let angle = (360. * f64::from(i)) / 10.0;
let red = (1.0 + f64::cos((angle - 60.0) * PI / 180.0)) / 2.0;
@ -191,7 +191,7 @@ fn create_pipeline() -> Result<gst::Pipeline, Error> {
// Here we go one step up in our stack of transformations, removing any
// changes we did to them since the last call to cr.save();
cr.restore();
cr.restore().expect("Failed to restore state");
}
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