[PATCH 3/9] d3d9/tests: Introduce compare_uint().

[Henri Verbeet]

Signed-off-by: Henri Verbeet 
---
 dlls/d3d9/tests/d3d9ex.c | 21 +++++++++++----------
 dlls/d3d9/tests/visual.c | 19 +++++++++++--------
 2 files changed, 22 insertions(+), 18 deletions(-)

diff --git a/dlls/d3d9/tests/d3d9ex.c b/dlls/d3d9/tests/d3d9ex.c
index 17dd3c5c12e..5b24f6b05eb 100644
--- a/dlls/d3d9/tests/d3d9ex.c
+++ b/dlls/d3d9/tests/d3d9ex.c
@@ -48,18 +48,19 @@ static BOOL adapter_is_warp(const D3DADAPTER_IDENTIFIER9 *identifier)
     return !strcmp(identifier->Driver, "d3d10warp.dll");
 }

-static BOOL color_match(D3DCOLOR c1, D3DCOLOR c2, BYTE max_diff)
+static BOOL compare_uint(unsigned int x, unsigned int y, unsigned int max_diff)
 {
-    unsigned int i;
+    unsigned int diff = x > y ? x - y : y - x;

-    for (i = 0; i < 4; ++i)
-    {
-        if (abs((c1 & 0xff) - (c2 & 0xff)) > max_diff)
-            return FALSE;
-        c1 >>= 8;
-        c2 >>= 8;
-    }
-    return TRUE;
+    return diff <= max_diff;
+}
+
+static BOOL color_match(D3DCOLOR c1, D3DCOLOR c2, BYTE max_diff)
+{
+    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 DWORD get_pixel_color(IDirect3DDevice9Ex *device, unsigned int x, unsigned int y)
diff --git a/dlls/d3d9/tests/visual.c b/dlls/d3d9/tests/visual.c
index 9ceb758c605..92116b3eb83 100644
--- a/dlls/d3d9/tests/visual.c
+++ b/dlls/d3d9/tests/visual.c
@@ -63,16 +63,19 @@ static HWND create_window(void)
     return hwnd;
 }

+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((int)(c1 & 0xff) - (int)(c2 & 0xff)) > max_diff) return FALSE;
-    c1 >>= 8; c2 >>= 8;
-    if (abs((int)(c1 & 0xff) - (int)(c2 & 0xff)) > max_diff) return FALSE;
-    c1 >>= 8; c2 >>= 8;
-    if (abs((int)(c1 & 0xff) - (int)(c2 & 0xff)) > max_diff) return FALSE;
-    c1 >>= 8; c2 >>= 8;
-    if (abs((int)(c1 & 0xff) - (int)(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)