beenull/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2024-11-22 07:30:19 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 6

LibGfx: Preserve path order while splitting cubic/quadratic beziers

Browse source 
This changes the splitting to use a stack, which ensures the resulting
line segments follow the path in order. This will be important for SVG
`<textPath>`s which place text along a path.
This commit is contained in:
MacDue 2023-12-10 19:44:00 +01:00 committed by Andreas Kling
parent b2abd1dd05
commit 8713968165
Notes: sideshowbarker 2024-07-18 02:13:10 +09:00 
Author: https://github.com/MacDue
Commit: https://github.com/SerenityOS/serenity/commit/8713968165
Pull-request: https://github.com/SerenityOS/serenity/pull/22347
1 changed files with 11 additions and 10 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
Userland/Libraries/LibGfx/Painter.cpp
View file

@ -22,6 +22,7 @@
#include <AK/Memory.h>
#include <AK/Queue.h>
#include <AK/QuickSort.h>
#include <AK/Stack.h>
#include <AK/StdLibExtras.h>
#include <AK/StringBuilder.h>
#include <AK/Utf32View.h>
@ -2135,14 +2136,14 @@ void Painter::for_each_line_segment_on_bezier_curve(FloatPoint control_point, Fl
auto new_segment = po1_midpoint + po2_midpoint;
new_segment /= 2;
segments.enqueue({ po1_midpoint, p1, new_segment });
segments.enqueue({ po2_midpoint, new_segment, p2 });
segments.append({ po2_midpoint, new_segment, p2 });
segments.append({ po1_midpoint, p1, new_segment });
};
Queue<SegmentDescriptor> segments;
segments.enqueue({ control_point, p1, p2 });
Vector<SegmentDescriptor> segments;
segments.append({ control_point, p1, p2 });
while (!segments.is_empty()) {
auto segment = segments.dequeue();
auto segment = segments.take_last();
if (can_approximate_bezier_curve(segment.p1, segment.p2, segment.control_point))
callback(segment.p1, segment.p2);
@ -2218,14 +2219,14 @@ void Painter::for_each_line_segment_on_cubic_bezier_curve(FloatPoint control_poi
};
auto level_3_midpoint = (level_2_midpoints[0] + level_2_midpoints[1]) / 2;
segments.enqueue({ { level_1_midpoints[0], level_2_midpoints[0] }, p1, level_3_midpoint });
segments.enqueue({ { level_2_midpoints[1], level_1_midpoints[2] }, level_3_midpoint, p2 });
segments.append({ { level_2_midpoints[1], level_1_midpoints[2] }, level_3_midpoint, p2 });
segments.append({ { level_1_midpoints[0], level_2_midpoints[0] }, p1, level_3_midpoint });
};
Queue<SegmentDescriptor> segments;
segments.enqueue({ { control_point_0, control_point_1 }, p1, p2 });
Vector<SegmentDescriptor> segments;
segments.append({ { control_point_0, control_point_1 }, p1, p2 });
while (!segments.is_empty()) {
auto segment = segments.dequeue();
auto segment = segments.take_last();
if (can_approximate_cubic_bezier_curve(segment.p1, segment.p2, segment.control_points.control_point_0, segment.control_points.control_point_1))
callback(segment.p1, segment.p2);