src/java.desktop/windows/native/libawt/java2d/d3d/D3DVertexCacher.cpp

@@ -107,16 +107,17 @@
 // fudge factors
 #ifdef LINE_FUDGE
 
 // Horiz/vertical
 #define HV_FF1 ( 0.0f)
-#define HV_FF2 ( 0.51f)
+#define HV_FF2 ( 0.501f)
 // For the record: value below (or larger) is required for Intel 855, but
 // breaks Nvidia, ATI and Intel 965, and since the pipeline is disabled on
 // 855 anyway we'll use 0.51f.
 //#define HV_FF2 ( 0.5315f)
 #define HV_FF3 (-0.2f)
+#define HV_FF4 ( 0.51f)
 // single pixel
 #define SP_FF4 ( 0.3f)
 
 // diagonal, down
 #define DD_FX1 (-0.1f)

@@ -249,14 +250,14 @@
             // vertical
             fx1  = (float)x1+HV_FF1;
             fx2  = fx1;
             if (y1 > y2) {
                 fy1 = (float)y2+HV_FF3;
-                fy2 = (float)y1+HV_FF2;
+                fy2 = (float)y1+HV_FF4;
             } else {
                 fy1 = (float)y1+HV_FF3;
-                fy2 = (float)y2+HV_FF2;
+                fy2 = (float)y2+HV_FF4;
             }
         } else {
             // diagonal
             if (x1 > x2 && y1 > y2) {
                 // ^

@@ -445,13 +446,13 @@
         // horiz: top left - top right
         ADD_LINE_XYC(fx1+HV_FF3, fy1+HV_FF1, fx2-1.0f+HV_FF2, fy1+HV_FF1,color);
         // horiz: bottom left - bottom right
         ADD_LINE_XYC(fx1+1.0f+HV_FF3, fy2+HV_FF1, fx2+HV_FF2, fy2+HV_FF1,color);
         // vert : top right - bottom right
-        ADD_LINE_XYC(fx2+HV_FF1, fy1+HV_FF3, fx2+HV_FF1, fy2-1.0f+HV_FF2,color);
+        ADD_LINE_XYC(fx2+HV_FF1, fy1+HV_FF3, fx2+HV_FF1, fy2-1.0f+HV_FF4,color);
         // vert : top left - bottom left
-        ADD_LINE_XYC(fx1+HV_FF1, fy1+1.0f+HV_FF3, fx1+HV_FF1, fy2+HV_FF2,color);
+        ADD_LINE_XYC(fx1+HV_FF1, fy1+1.0f+HV_FF3, fx1+HV_FF1, fy2+HV_FF4,color);
     }
     return res;
 }
 
 HRESULT D3DVertexCacher::FillRect(int x1, int y1, int x2, int y2)