1 files changed, 53 insertions, 0 deletions
diff --git a/gfx/thebes/gfxQuad.h b/gfx/thebes/gfxQuad.h
new file mode 100644
index 0000000000..76c6717e39
--- /dev/null
+++ b/gfx/thebes/gfxQuad.h
@@ -0,0 +1,53 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef GFX_QUAD_H
+#define GFX_QUAD_H
+
+#include "gfxTypes.h"
+#include "gfxRect.h"
+#include "gfxLineSegment.h"
+#include <algorithm>
+
+struct gfxQuad {
+  gfxQuad(const gfxPoint& aOne, const gfxPoint& aTwo, const gfxPoint& aThree,
+          const gfxPoint& aFour) {
+    mPoints[0] = aOne;
+    mPoints[1] = aTwo;
+    mPoints[2] = aThree;
+    mPoints[3] = aFour;
+  }
+
+  bool Contains(const gfxPoint& aPoint) {
+    return (gfxLineSegment(mPoints[0], mPoints[1])
+                .PointsOnSameSide(aPoint, mPoints[2]) &&
+            gfxLineSegment(mPoints[1], mPoints[2])
+                .PointsOnSameSide(aPoint, mPoints[3]) &&
+            gfxLineSegment(mPoints[2], mPoints[3])
+                .PointsOnSameSide(aPoint, mPoints[0]) &&
+            gfxLineSegment(mPoints[3], mPoints[0])
+                .PointsOnSameSide(aPoint, mPoints[1]));
+  }
+
+  gfxRect GetBounds() {
+    gfxFloat min_x, max_x;
+    gfxFloat min_y, max_y;
+
+    min_x = max_x = mPoints[0].x;
+    min_y = max_y = mPoints[0].y;
+
+    for (int i = 1; i < 4; i++) {
+      min_x = std::min(mPoints[i].x, min_x);
+      max_x = std::max(mPoints[i].x, max_x);
+      min_y = std::min(mPoints[i].y, min_y);
+      max_y = std::max(mPoints[i].y, max_y);
+    }
+    return gfxRect(min_x, min_y, max_x - min_x, max_y - min_y);
+  }
+
+  gfxPoint mPoints[4];
+};
+
+#endif /* GFX_QUAD_H */