Chip Davis : d3d8/tests: Introduce compare_uint().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 67af6800a285058bb436eafc31d231a97490bb78
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=67af6800a285058bb436eafc31d231a97490bb78

Author: Chip Davis <cdavis at codeweavers.com>
Date:   Mon Mar 30 20:48:08 2020 +0430

d3d8/tests: Introduce compare_uint().

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

---

 dlls/d3d8/tests/visual.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/dlls/d3d8/tests/visual.c b/dlls/d3d8/tests/visual.c
index ab194b9ced..fc8a05a3c4 100644
--- a/dlls/d3d8/tests/visual.c
+++ b/dlls/d3d8/tests/visual.c
@@ -51,16 +51,19 @@ static HWND create_window(void)
             0, 0, rect.right - rect.left, rect.bottom - rect.top, 0, 0, 0, 0);
 }
 
+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 color_match(D3DCOLOR c1, D3DCOLOR 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)