linux-kernel - [Patch 1/2] media: v4l2-rect.h: add enclosed rectangle helper

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Date:   Thu, 28 May 2020 08:26:04 -0500
From:   Benoit Parrot <bparrot@...com>
To:     Hans Verkuil <hverkuil@...all.nl>,
        Prabhakar Lad <prabhakar.csengg@...il.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Kukjin Kim <kgene@...nel.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Andrzej Pietrasiewicz <andrzejtp2010@...il.com>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>
CC:     <linux-media@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Benoit Parrot <bparrot@...com>
Subject: [Patch 1/2] media: v4l2-rect.h: add enclosed rectangle helper

Add a helper function to check if one rectangle is enclosed inside
another.

Signed-off-by: Benoit Parrot <bparrot@...com>
---
 include/media/v4l2-rect.h | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/include/media/v4l2-rect.h b/include/media/v4l2-rect.h
index 8800a640c224..bd587d0c0dc3 100644
--- a/include/media/v4l2-rect.h
+++ b/include/media/v4l2-rect.h
@@ -184,4 +184,24 @@ static inline bool v4l2_rect_overlap(const struct v4l2_rect *r1,
 	return true;
 }
 
+/**
+ * v4l2_rect_enclosed() - is r1 enclosed in r2?
+ * @r1: rectangle.
+ * @r2: rectangle.
+ *
+ * Returns true if @r1 is enclosed in @r2.
+ */
+static inline bool v4l2_rect_enclosed(struct v4l2_rect *r1,
+				      struct v4l2_rect *r2)
+{
+	if (r1->left < r2->left || r1->top < r2->top)
+		return false;
+	if (r1->left + r1->width > r2->left + r2->width)
+		return false;
+	if (r1->top + r1->height > r2->top + r2->height)
+		return false;
+
+	return true;
+}
+
 #endif
-- 
2.17.1