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Auto merge of #469 - floppyhammer:fix-d3d9-cohen-sutherland-implementation, r=jdm 

Fix Cohen-Sutherland algorithm implementation for d3d9

Fix the artifact caused by view box clipping on d3d9 level. Note that d3d11 doesn't have this issue.

![clipping_issue](https://user-images.githubusercontent.com/28705694/125883499-53ea8660-f7e2-43a5-ab27-8f820da9a05a.gif)
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bors-servo 2021-07-19 08:03:01 -04:00 committed by GitHub
parent 62fbfcc91c 7a57ce2ff9
commit 6ce65b29df
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1 changed files with 8 additions and 8 deletions
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16
content/src/clip.rs
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@ -515,25 +515,25 @@ pub fn clip_line_segment_to_rect(mut line_segment: LineSegment2F, rect: RectF)
point = vec2f(rect.min_x(), point = vec2f(rect.min_x(),
lerp(line_segment.from_y(), lerp(line_segment.from_y(),
line_segment.to_y(), line_segment.to_y(),
(line_segment.min_x() - line_segment.from_x()) / (rect.min_x() - line_segment.from_x()) /
(line_segment.max_x() - line_segment.min_x()))); (line_segment.to_x() - line_segment.from_x())));
} else if outcode.contains(Outcode::RIGHT) { } else if outcode.contains(Outcode::RIGHT) {
point = vec2f(rect.max_x(), point = vec2f(rect.max_x(),
lerp(line_segment.from_y(), lerp(line_segment.from_y(),
line_segment.to_y(), line_segment.to_y(),
(line_segment.max_x() - line_segment.from_x()) / (rect.max_x() - line_segment.from_x()) /
(line_segment.max_x() - line_segment.min_x()))); (line_segment.to_x() - line_segment.from_x())));
} else if outcode.contains(Outcode::TOP) { } else if outcode.contains(Outcode::TOP) {
point = vec2f(lerp(line_segment.from_x(), point = vec2f(lerp(line_segment.from_x(),
line_segment.to_x(), line_segment.to_x(),
(line_segment.min_y() - line_segment.from_y()) / (rect.min_y() - line_segment.from_y()) /
(line_segment.max_y() - line_segment.min_y())), (line_segment.to_y() - line_segment.from_y())),
rect.min_y()); rect.min_y());
} else if outcode.contains(Outcode::BOTTOM) { } else if outcode.contains(Outcode::BOTTOM) {
point = vec2f(lerp(line_segment.from_x(), point = vec2f(lerp(line_segment.from_x(),
line_segment.to_x(), line_segment.to_x(),
(line_segment.max_y() - line_segment.from_y()) / (rect.max_y() - line_segment.from_y()) /
(line_segment.max_y() - line_segment.min_y())), (line_segment.to_y() - line_segment.from_y())),
rect.max_y()); rect.max_y());
} }