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Store content offset in unscaled pixels

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Content offset is now stored in unscaled pixels, so that it can be
applied to tile positions during compositor rendering without unscaling
it. This means that when using it in calculations of layer size (stored
in device pixels), we need to scale it. Scene scale is now stored as a
scale rather than a transformation.

Fixes #3269.
Fixes #3042.
This commit is contained in:
Martin Robinson 2014-09-12 11:37:41 -07:00
parent 13ae369dec
commit ea14fca1dc
5 changed files with 89 additions and 100 deletions
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7
components/compositing/compositor_data.rs
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@ -8,6 +8,7 @@ use pipeline::CompositionPipeline;
use azure::azure_hl::Color;
use geom::point::TypedPoint2D;
use geom::scale_factor::ScaleFactor;
use geom::size::{Size2D, TypedSize2D};
use geom::rect::Rect;
use gfx::render_task::UnusedBufferMsg;
@ -74,11 +75,13 @@ impl CompositorData {
layer.contents_changed();
// Call scroll for bounds checking if the page shrunk. Use (-1, -1) as the
// cursor position to make sure the scroll isn't propagated downwards.
// cursor position to make sure the scroll isn't propagated downwards. The
// scale doesn't matter here since 0, 0 is 0, 0 no matter the scene scale.
events::handle_scroll_event(layer.clone(),
TypedPoint2D(0f32, 0f32),
TypedPoint2D(-1f32, -1f32),
size);
size,
ScaleFactor(1.0) /* scene_scale */);
}
pub fn find_layer_with_pipeline_and_layer_id(layer: Rc<Layer<CompositorData>>,