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Change retrieval of buffers from sublayers to both clip relative

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to the scrolled position of its parent layer and to offset the
origin, since each layer assumes that its origin is 0,0.
This commit is contained in:
Lars Bergstrom 2013-09-17 17:40:56 -05:00
parent b77c3eaaa0
commit d6141edfd4
1 changed files with 7 additions and 2 deletions
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9
src/components/main/compositing/compositor_layer.rs
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@ -244,10 +244,15 @@ impl CompositorLayer {
let transform = |x: &mut CompositorLayerChild| -> bool {
match x.container.scissor {
Some(scissor) => {
let new_rect = window_rect.intersection(&scissor);
let new_rect = rect.intersection(&scissor);
match new_rect {
Some(new_rect) => {
x.child.get_buffer_request(new_rect, scale)
// Child layers act as if they are rendered at (0,0), so we
// subtract the layer's (x,y) coords in its containing page
// to make the child_rect appear in coordinates local to it.
let child_rect = Rect(new_rect.origin.sub(&scissor.origin),
new_rect.size);
x.child.get_buffer_request(child_rect, scale)
}
None => {
false //Layer is offscreen