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Rework Servo_AnimationCompose to rely less on pinned temporaries

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This commit is contained in:
Brian Birtles 2017-05-23 15:18:56 +09:00
parent 795d8ad767
commit a408fd41df
1 changed files with 46 additions and 31 deletions
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71
ports/geckolib/glue.rs
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@ -366,46 +366,61 @@ pub extern "C" fn Servo_AnimationCompose(raw_value_map: RawServoAnimationValueMa
return;
}
// Temporaries used in the following if-block whose lifetimes we need to prolong.
// Extract keyframe values.
let raw_from_value;
let from_composite_result;
let from_value = if !segment.mFromValue.mServo.mRawPtr.is_null() {
let keyframe_from_value = if !segment.mFromValue.mServo.mRawPtr.is_null() {
raw_from_value = unsafe { &*segment.mFromValue.mServo.mRawPtr };
match segment.mFromComposite {
CompositeOperation::Add | CompositeOperation::Accumulate => {
let value_to_composite = AnimationValue::as_arc(&raw_from_value).as_ref();
from_composite_result = if segment.mFromComposite == CompositeOperation::Add {
underlying_value.as_ref().unwrap().add(value_to_composite)
Some(AnimationValue::as_arc(&raw_from_value))
} else {
underlying_value.as_ref().unwrap().accumulate(value_to_composite, 1)
};
from_composite_result.as_ref().unwrap_or(value_to_composite)
}
_ => { AnimationValue::as_arc(&raw_from_value) }
}
} else {
underlying_value.as_ref().unwrap()
None
};
let raw_to_value;
let to_composite_result;
let to_value = if !segment.mToValue.mServo.mRawPtr.is_null() {
let keyframe_to_value = if !segment.mToValue.mServo.mRawPtr.is_null() {
raw_to_value = unsafe { &*segment.mToValue.mServo.mRawPtr };
match segment.mToComposite {
CompositeOperation::Add | CompositeOperation::Accumulate => {
let value_to_composite = AnimationValue::as_arc(&raw_to_value).as_ref();
to_composite_result = if segment.mToComposite == CompositeOperation::Add {
underlying_value.as_ref().unwrap().add(value_to_composite)
Some(AnimationValue::as_arc(&raw_to_value))
} else {
underlying_value.as_ref().unwrap().accumulate(value_to_composite, 1)
None
};
to_composite_result.as_ref().unwrap_or(value_to_composite)
// Composite with underlying value.
// A return value of None means, "Just use keyframe_value as-is."
let composite_endpoint = |keyframe_value: Option<&Arc<AnimationValue>>,
composite_op: CompositeOperation| -> Option<AnimationValue> {
match keyframe_value {
Some(keyframe_value) => {
match composite_op {
CompositeOperation::Add => {
debug_assert!(need_underlying_value,
"Should have detected we need an underlying value");
underlying_value.as_ref().unwrap().add(keyframe_value).ok()
},
CompositeOperation::Accumulate => {
debug_assert!(need_underlying_value,
"Should have detected we need an underlying value");
underlying_value.as_ref().unwrap().accumulate(keyframe_value, 1).ok()
},
_ => None,
}
_ => { AnimationValue::as_arc(&raw_to_value) }
},
None => {
debug_assert!(need_underlying_value,
"Should have detected we need an underlying value");
underlying_value.clone()
},
}
} else {
underlying_value.as_ref().unwrap()
};
let composited_from_value = composite_endpoint(keyframe_from_value, segment.mFromComposite);
let composited_to_value = composite_endpoint(keyframe_to_value, segment.mToComposite);
debug_assert!(keyframe_from_value.is_some() || composited_from_value.is_some(),
"Should have a suitable from value to use");
debug_assert!(keyframe_to_value.is_some() || composited_to_value.is_some(),
"Should have a suitable to value to use");
// Use the composited value if there is one, otherwise, use the original keyframe value.
let from_value = composited_from_value.as_ref().unwrap_or_else(|| keyframe_from_value.unwrap());
let to_value = composited_to_value.as_ref().unwrap_or_else(|| keyframe_to_value.unwrap());
let progress = unsafe { Gecko_GetProgressFromComputedTiming(computed_timing) };
if segment.mToKey == segment.mFromKey {