Reserve space for the line metrics styles created by ParagraphSkia::G…

…etLineMetrics (flutter#26909)
elancom · Jun 25, 2021 · f1d78fd · f1d78fd
1 parent dd418a1
commit f1d78fd
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/third_party/txt/src/skia/paragraph_skia.cc b/third_party/txt/src/skia/paragraph_skia.cc
@@ -17,6 +17,7 @@
 #include "paragraph_skia.h"
 
 #include <algorithm>
+#include <numeric>
 
 namespace txt {
 
@@ -106,6 +107,12 @@ std::vector<LineMetrics>& ParagraphSkia::GetLineMetrics() {
     paragraph_->getLineMetrics(metrics);
 
     line_metrics_.emplace();
+    line_metrics_styles_.reserve(
+        std::accumulate(metrics.begin(), metrics.end(), 0,
+                        [](const int a, const skt::LineMetrics& b) {
+                          return a + b.fLineMetrics.size();
+                        }));
+
     for (const skt::LineMetrics& skm : metrics) {
       LineMetrics& txtm = line_metrics_->emplace_back(
           skm.fStartIndex, skm.fEndIndex, skm.fEndExcludingWhitespaces,