dfxvideo: remove unneeded double division in line code

diff --git a/plugins/dfxvideo/soft.c b/plugins/dfxvideo/soft.c
index 160b0c4..c1c3bef 100644 (file)
--- a/plugins/dfxvideo/soft.c
+++ b/plugins/dfxvideo/soft.c
@@ -7092,7 +7092,7 @@ static void DrawSoftwareLineShade(int32_t rgb0, int32_t rgb1)
 {
        short x0, y0, x1, y1, xt, yt;
        int32_t rgbt;
-       double m, dy, dx;
+       int dy, dx;
 
        if (lx0 > drawW && lx1 > drawW) return;
        if (ly0 > drawH && ly1 > drawH) return;
@@ -7142,17 +7142,15 @@ static void DrawSoftwareLineShade(int32_t rgb0, int32_t rgb1)
                                dy = y1 - y0;
                        }
 
-                       m = dy / dx;
-
-                       if (m >= 0)
+                       if ((dx >= 0 && dy >= 0) || (dx < 0 && dy < 0))
                        {
-                               if (m > 1)
+                               if (abs(dy) > abs(dx))
                                        Line_S_SE_Shade(x0, y0, x1, y1, rgb0, rgb1);
                                else
                                        Line_E_SE_Shade(x0, y0, x1, y1, rgb0, rgb1);
                        }
                        else
-                               if (m < -1)
+                               if (abs(dy) > abs(dx))
                                        Line_N_NE_Shade(x0, y0, x1, y1, rgb0, rgb1);
                                else
                                        Line_E_NE_Shade(x0, y0, x1, y1, rgb0, rgb1);
@@ -7164,7 +7162,7 @@ static void DrawSoftwareLineShade(int32_t rgb0, int32_t rgb1)
 static void DrawSoftwareLineFlat(int32_t rgb)
 {
        short x0, y0, x1, y1, xt, yt;
-       double m, dy, dx;
+       int dy, dx;
        unsigned short colour = 0;
  
        if (lx0 > drawW && lx1 > drawW) return;
@@ -7216,17 +7214,15 @@ static void DrawSoftwareLineFlat(int32_t rgb)
                                dy = y1 - y0;
                        }
 
-                       m = dy/dx;
-
-                       if (m >= 0)
+                       if ((dx >= 0 && dy >= 0) || (dx < 0 && dy < 0))
                        {
-                               if (m > 1)
+                               if (abs(dy) > abs(dx))
                                        Line_S_SE_Flat(x0, y0, x1, y1, colour);
                                else
                                        Line_E_SE_Flat(x0, y0, x1, y1, colour);
                        }
                        else
-                               if (m < -1)
+                               if (abs(dy) > abs(dx))
                                        Line_N_NE_Flat(x0, y0, x1, y1, colour);
                                else
                                        Line_E_NE_Flat(x0, y0, x1, y1, colour);