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layout: support tiled gradients

Browse source 
Use background-size, background-position properties to render
CSS gradients.

Some cleanup in display_list_builder.rs related to gradient
calculations.

Adds two wpt tests for tiled gradients.

Note: For now even gradients with background-repeat: no-repeat
are repeated. Sometimes the gradient is not repeated everywhere.

Enable vars-background-shorthand-001.html CSS test.
This commit is contained in:
Pyfisch 2017-12-13 20:02:49 +01:00
parent 80341b291b
commit 9502e9f42a
9 changed files with 353 additions and 164 deletions
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6
components/layout/webrender_helpers.rs
View file

@ -428,7 +428,6 @@ impl WebRenderDisplayItemConverter for DisplayItem {
builder.push_border(&self.prim_info(), widths, details);
}
DisplayItem::Gradient(ref item) => {
let rect = item.base.bounds;
let start_point = item.gradient.start_point.to_pointf();
let end_point = item.gradient.end_point.to_pointf();
let extend_mode = if item.gradient.repeating {
@ -442,11 +441,10 @@ impl WebRenderDisplayItemConverter for DisplayItem {
extend_mode);
builder.push_gradient(&self.prim_info(),
gradient,
rect.size.to_sizef(),
item.tile.to_sizef(),
webrender_api::LayoutSize::zero());
}
DisplayItem::RadialGradient(ref item) => {
let rect = item.base.bounds;
let center = item.gradient.center.to_pointf();
let radius = item.gradient.radius.to_sizef();
let extend_mode = if item.gradient.repeating {
@ -460,7 +458,7 @@ impl WebRenderDisplayItemConverter for DisplayItem {
extend_mode);
builder.push_radial_gradient(&self.prim_info(),
gradient,
rect.size.to_sizef(),
item.tile.to_sizef(),
webrender_api::LayoutSize::zero());
}
DisplayItem::Line(ref item) => {