Huw Davies : gdi32: Add a helper to retrieve the octant bias.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 666f83bc0f82c4d8bae2f30f7a6dee8f2d4cf584
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=666f83bc0f82c4d8bae2f30f7a...

Author: Huw Davies <huw(a)codeweavers.com>
Date:   Wed Nov 16 11:20:53 2011 +0000

gdi32: Add a helper to retrieve the octant bias.

---

 dlls/gdi32/dibdrv/objects.c |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/dlls/gdi32/dibdrv/objects.c b/dlls/gdi32/dibdrv/objects.c
index 3de6cb9..c0dd7d2 100644
--- a/dlls/gdi32/dibdrv/objects.c
+++ b/dlls/gdi32/dibdrv/objects.c
@@ -308,6 +308,12 @@ static inline DWORD get_octant_mask(int dx, int dy)
     return 1 << (get_octant_number(dx, dy) - 1);
 }
 
+static inline int get_bias( DWORD mask )
+{
+    /* Octants 3, 5, 6 and 8 take a bias */
+    return (mask & 0xb4) ? 1 : 0;
+}
+
 static void solid_pen_line_callback(dibdrv_physdev *pdev, INT x, INT y)
 {
     RECT rect;
@@ -653,8 +659,7 @@ static BOOL solid_pen_line(dibdrv_physdev *pdev, POINT *start, POINT *end)
         params.dx = abs(dx);
         params.dy = abs(dy);
         params.octant = get_octant_mask(dx, dy);
-        /* Octants 3, 5, 6 and 8 take a bias */
-        params.bias = (params.octant & 0xb4) ? 1 : 0;
+        params.bias   = get_bias(params.octant);
 
         for(i = 0; i < clip->numRects; i++)
         {
@@ -926,8 +931,7 @@ static BOOL dashed_pen_line(dibdrv_physdev *pdev, POINT *start, POINT *end)
         params.dx = abs(dx);
         params.dy = abs(dy);
         params.octant = get_octant_mask(dx, dy);
-        /* Octants 3, 5, 6 and 8 take a bias */
-        params.bias = (params.octant & 0xb4) ? 1 : 0;
+        params.bias   = get_bias(params.octant);
 
         for(i = 0; i < clip->numRects; i++)
         {