Henri Verbeet : d3dx9/tests: Introduce compare_uint().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 9bcb1f5195d1e65e0e7afb288d36fee716fe3a60
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=9bcb1f5195d1e65e0e7afb288d36fee716fe3a60

Author: Henri Verbeet <hverbeet at codeweavers.com>
Date:   Mon Mar 30 20:48:15 2020 +0430

d3dx9/tests: Introduce compare_uint().

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

---

 dlls/d3dx9_36/tests/texture.c | 23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/dlls/d3dx9_36/tests/texture.c b/dlls/d3dx9_36/tests/texture.c
index 2688559c2c..bec7ba4827 100644
--- a/dlls/d3dx9_36/tests/texture.c
+++ b/dlls/d3dx9_36/tests/texture.c
@@ -146,20 +146,19 @@ static inline void expect_vec4_(unsigned int line, const D3DXVECTOR4 *expected,
         got->x, got->y, got->z, got->w);
 }
 
+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_color(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 is_autogenmipmap_supported(IDirect3DDevice9 *device, D3DRESOURCETYPE resource_type)