d3d10core/tests: Introduce compare_uint().

dlls/d3d10core/tests/d3d10core.c

@@ -204,6 +204,13 @@ static BOOL compare_vec4(const struct vec4 *v1, const struct vec4 *v2, unsigned
             && compare_float(v1->w, v2->w, ulps);
 }
 
+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_uvec4(const struct uvec4* v1, const struct uvec4 *v2)
 {
     return v1->x == v2->x && v1->y == v2->y && v1->z == v2->z && v1->w == v2->w;
@@ -211,18 +218,10 @@ static BOOL compare_uvec4(const struct uvec4* v1, const struct uvec4 *v2)
 
 static BOOL compare_color(DWORD c1, DWORD 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);
 }
 
 struct srv_desc