1 files changed, 60 insertions, 0 deletions
diff --git a/gfx/skia/skia/src/core/SkFontMetricsPriv.cpp b/gfx/skia/skia/src/core/SkFontMetricsPriv.cpp
new file mode 100644
index 0000000000..484911a413
--- /dev/null
+++ b/gfx/skia/skia/src/core/SkFontMetricsPriv.cpp
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "src/core/SkFontMetricsPriv.h"
+
+#include "src/core/SkReadBuffer.h"
+#include "src/core/SkWriteBuffer.h"
+
+#include <optional>
+
+void SkFontMetricsPriv::Flatten(SkWriteBuffer& buffer, const SkFontMetrics& metrics) {
+    buffer.writeUInt(metrics.fFlags);
+    buffer.writeScalar(metrics.fTop);
+    buffer.writeScalar(metrics.fAscent);
+    buffer.writeScalar(metrics.fDescent);
+    buffer.writeScalar(metrics.fBottom);
+    buffer.writeScalar(metrics.fLeading);
+    buffer.writeScalar(metrics.fAvgCharWidth);
+    buffer.writeScalar(metrics.fMaxCharWidth);
+    buffer.writeScalar(metrics.fXMin);
+    buffer.writeScalar(metrics.fXMax);
+    buffer.writeScalar(metrics.fXHeight);
+    buffer.writeScalar(metrics.fCapHeight);
+    buffer.writeScalar(metrics.fUnderlineThickness);
+    buffer.writeScalar(metrics.fUnderlinePosition);
+    buffer.writeScalar(metrics.fStrikeoutThickness);
+    buffer.writeScalar(metrics.fStrikeoutPosition);
+}
+
+std::optional<SkFontMetrics> SkFontMetricsPriv::MakeFromBuffer(SkReadBuffer& buffer) {
+    SkASSERT(buffer.isValid());
+
+    SkFontMetrics metrics;
+    metrics.fFlags = buffer.readUInt();
+    metrics.fTop = buffer.readScalar();
+    metrics.fAscent = buffer.readScalar();
+    metrics.fDescent = buffer.readScalar();
+    metrics.fBottom = buffer.readScalar();
+    metrics.fLeading = buffer.readScalar();
+    metrics.fAvgCharWidth = buffer.readScalar();
+    metrics.fMaxCharWidth = buffer.readScalar();
+    metrics.fXMin = buffer.readScalar();
+    metrics.fXMax = buffer.readScalar();
+    metrics.fXHeight = buffer.readScalar();
+    metrics.fCapHeight = buffer.readScalar();
+    metrics.fUnderlineThickness = buffer.readScalar();
+    metrics.fUnderlinePosition = buffer.readScalar();
+    metrics.fStrikeoutThickness = buffer.readScalar();
+    metrics.fStrikeoutPosition = buffer.readScalar();
+
+    // All the reads above were valid, so return the metrics.
+    if (buffer.isValid()) {
+        return metrics;
+    }
+
+    return std::nullopt;
+}