[PATCH] d3d9/tests: Introduce absdiff().

[Chip Davis]

Sorry, but this one really does need this function. It has a comparison
that doesn't fit the pattern 'abs(x - y) <= max_diff' that
compare_uint() is intended for, and I'm not sure how to rewrite it to
fit that pattern.

Signed-off-by: Chip Davis <cdavis at codeweavers.com>
---
 dlls/d3d9/tests/visual.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/dlls/d3d9/tests/visual.c b/dlls/d3d9/tests/visual.c
index f873f3ae9b3..ab754f9d3bc 100644
--- a/dlls/d3d9/tests/visual.c
+++ b/dlls/d3d9/tests/visual.c
@@ -63,11 +63,14 @@ static HWND create_window(void)
     return hwnd;
 }
 
-static BOOL compare_uint(unsigned int x, unsigned int y, unsigned int max_diff)
+static unsigned int absdiff(unsigned int x, unsigned int y)
 {
-    unsigned int diff = x > y ? x - y : y - x;
+    return x > y ? x - y : y - x;
+}
 
-    return diff <= max_diff;
+static BOOL compare_uint(unsigned int x, unsigned int y, unsigned int max_diff)
+{
+    return absdiff(x, y) <= max_diff;
 }
 
 static BOOL color_match(D3DCOLOR c1, D3DCOLOR c2, BYTE max_diff)
@@ -3191,7 +3194,7 @@ static void generate_bumpmap_textures(IDirect3DDevice9 *device) {
                 WORD *ptr = (WORD *)(((BYTE *)locked_rect.pBits) + (y * locked_rect.Pitch));
                 for (x = 0; x < 128; ++x)
                 {
-                    if(abs(x-64)>abs(y-64))
+                    if(absdiff(x,64)>absdiff(y,64))
                     {
                         if(x < 64)
                             *ptr++ = 0xc000;
-- 
2.24.0