Henri Verbeet : d2d1/tests: Introduce compare_uint().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 1cb9a31bdfed9eb79769541a5fb36094bb65d636
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=1cb9a31bdfed9eb79769541a5fb36094bb65d636

Author: Henri Verbeet <hverbeet at codeweavers.com>
Date:   Mon Mar 30 20:48:13 2020 +0430

d2d1/tests: Introduce compare_uint().

Signed-off-by: Henri Verbeet <hverbeet at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/d2d1/tests/d2d1.c | 23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/dlls/d2d1/tests/d2d1.c b/dlls/d2d1/tests/d2d1.c
index 8548a0a4aa..7c0ee91099 100644
--- a/dlls/d2d1/tests/d2d1.c
+++ b/dlls/d2d1/tests/d2d1.c
@@ -346,20 +346,19 @@ static DWORD get_readback_colour(struct resource_readback *rb, unsigned int x, u
     return ((DWORD *)((BYTE *)rb->map_desc.pData + y * rb->map_desc.RowPitch))[x];
 }
 
+static BOOL compare_uint(unsigned int x, unsigned int y, unsigned int max_diff)
+{
+    unsigned int diff = x > y ? x - y : y - x;
+
+    return diff <= max_diff;
+}
+
 static BOOL compare_colour(DWORD c1, DWORD c2, BYTE max_diff)
 {
-    if (abs((c1 & 0xff) - (c2 & 0xff)) > max_diff)
-        return FALSE;
-    c1 >>= 8; c2 >>= 8;
-    if (abs((c1 & 0xff) - (c2 & 0xff)) > max_diff)
-        return FALSE;
-    c1 >>= 8; c2 >>= 8;
-    if (abs((c1 & 0xff) - (c2 & 0xff)) > max_diff)
-        return FALSE;
-    c1 >>= 8; c2 >>= 8;
-    if (abs((c1 & 0xff) - (c2 & 0xff)) > max_diff)
-        return FALSE;
-    return TRUE;
+    return compare_uint(c1 & 0xff, c2 & 0xff, max_diff)
+            && compare_uint((c1 >> 8) & 0xff, (c2 >> 8) & 0xff, max_diff)
+            && compare_uint((c1 >> 16) & 0xff, (c2 >> 16) & 0xff, max_diff)
+            && compare_uint((c1 >> 24) & 0xff, (c2 >> 24) & 0xff, max_diff);
 }
 
 static BOOL compare_float(float f, float g, unsigned int ulps)