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Cache last fontgroup. Style recalc on wikipedia/rust 66ms -> 41ms.

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This commit is contained in:
Glenn Watson 2014-10-23 15:50:28 +10:00
parent 012a80cc18
commit b1c226778f
6 changed files with 36 additions and 13 deletions
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4
components/layout/text.rs
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@ -106,7 +106,7 @@ impl TextRunScanner {
let compression;
{
let in_fragment = self.clump.front().unwrap();
let font_style = in_fragment.style().get_font();
let font_style = in_fragment.style().get_font_arc();
fontgroup = font_context.get_layout_font_group_for_style(font_style);
compression = match in_fragment.white_space() {
white_space::normal | white_space::nowrap => CompressWhitespaceNewline,
@ -209,7 +209,7 @@ fn bounding_box_for_run_metrics(metrics: &RunMetrics, writing_mode: WritingMode)
///
/// `#[inline]` because often the caller only needs a few fields from the font metrics.
#[inline]
pub fn font_metrics_for_style(font_context: &mut FontContext, font_style: &FontStyle)
pub fn font_metrics_for_style(font_context: &mut FontContext, font_style: Arc<FontStyle>)
-> FontMetrics {
let fontgroup = font_context.get_layout_font_group_for_style(font_style);
fontgroup.fonts.get(0).borrow().metrics.clone()