Chip Davis : tests: Introduce compare_uint().

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: 5ad16f14588fb94582c11aa111a7e49456e7c943
URL:    https://source.winehq.org/git/vkd3d.git/?a=commit;h=5ad16f14588fb94582c11aa111a7e49456e7c943

Author: Chip Davis <cdavis at codeweavers.com>
Date:   Sun Apr 12 16:03:37 2020 -0500

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>

---

 tests/d3d12_test_utils.h | 23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/tests/d3d12_test_utils.h b/tests/d3d12_test_utils.h
index 5092183..e4c8e58 100644
--- a/tests/d3d12_test_utils.h
+++ b/tests/d3d12_test_utils.h
@@ -53,20 +53,19 @@ static void set_viewport(D3D12_VIEWPORT *vp, float x, float y,
     vp->MaxDepth = max_depth;
 }
 
+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 D3D12_SHADER_BYTECODE shader_bytecode(const DWORD *code, size_t size)