From c2e4a7977349f5b4b69cc39829c50512a9503f15 Mon Sep 17 00:00:00 2001
From: Vito Caputo <vcaputo@gnugeneration.com>
Date: Fri, 3 Feb 2017 13:01:00 -0800
Subject: fb: add fragment bounds checking helper

Simple x,y coordinate check
---
 src/fb.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/fb.h b/src/fb.h
index 13f6bcd..64f657b 100644
--- a/src/fb.h
+++ b/src/fb.h
@@ -34,4 +34,13 @@ void fb_get_put_pages_count(fb_t *fb, unsigned *count);
 fb_t * fb_new(int drm_fd, uint32_t crtc_id, uint32_t *connectors, int n_connectors, drmModeModeInfoPtr mode, int n_pages);
 void fb_fragment_divide(fb_fragment_t *fragment, unsigned n_fragments, fb_fragment_t fragments[]);
 
+static inline int fb_fragment_contains(fb_fragment_t *fragment, int x, int y)
+{
+	if (x < fragment->x || x >= fragment->x + fragment->width ||
+	    y < fragment->y || y >= fragment->y + fragment->height)
+		return 0;
+
+	return 1;
+}
+
 #endif
-- 
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