1 files changed, 36 insertions, 0 deletions
diff --git a/gfx/skia/skia/src/base/SkQuads.h b/gfx/skia/skia/src/base/SkQuads.h
new file mode 100644
index 0000000000..645d43bcd4
--- /dev/null
+++ b/gfx/skia/skia/src/base/SkQuads.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkQuads_DEFINED
+#define SkQuads_DEFINED
+
+/**
+ * Utilities for dealing with quadratic formulas with one variable:
+ *   f(t) = A*t^2 + B*t + C
+ */
+class SkQuads {
+public:
+    /**
+     * Puts up to 2 real solutions to the equation
+     *   A*t^2 + B*t + C = 0
+     * in the provided array.
+     */
+    static int RootsReal(double A, double B, double C,
+                         double solution[2]);
+
+    /**
+     * Evaluates the quadratic function with the 3 provided coefficients and the
+     * provided variable.
+     */
+    static double EvalAt(double A, double B, double C, double t) {
+        return A * t * t +
+               B * t +
+               C;
+    }
+};
+
+#endif