--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dmdrawline.h	Fri Sep 28 01:54:23 2012 +0300
@@ -0,0 +1,86 @@
+
+#ifdef DM_USE_SIMD
+static int DM_DRAWLINE_NAME_ASM (SDL_Surface *screen, int x0, int y0, int x1, int y1, const Uint32 col);
+#endif
+
+#ifdef DM_USE_C
+static int DM_DRAWLINE_NAME_C (SDL_Surface *screen, int x0, int y0, int x1, int y1, const Uint32 col)
+{
+    int dx, dy, xstep, ystep;
+    const int qpitch = screen->pitch / DM_DRAWLINE_DST_BYTES;
+
+    // Clipping
+    if (dmClipLineCoords(&x0, &y0, &x1, &y1, screen))
+        return -1;
+
+    // Compute initial deltas
+    dx = (x1 - x0) * 2;
+    dy = (y1 - y0) * 2;
+
+    if (dx < 0)
+    {
+        dx = -dx;
+        xstep = -1;
+    }
+    else
+        xstep = 1;
+
+    if (dy < 0)
+    {
+        dy = -dy;
+        ystep = -qpitch;
+    }
+    else
+        ystep = qpitch;
+
+    // Compute offsets
+    y0 *= qpitch;
+    y1 *= qpitch;
+
+    DM_DRAWLINE_DST_TYPE *pix = screen->pixels;
+
+    // Continue based on which delta is larger
+    if (dx > dy)
+    {
+        int afrac = dy - (dx / 2);
+        while (x0 != x1)
+        {
+            if (afrac >= 0)
+            {
+                y0 += ystep;
+                afrac -= dx;
+            }
+
+            x0 += xstep;
+            afrac += dy;
+            
+            DM_DRAWLINE_INNER
+        }
+    }
+    else
+    {
+        int afrac = dx - (dy / 2);
+        while (y0 != y1)
+        {
+            if (afrac >= 0)
+            {
+                x0 += xstep;
+                afrac -= dy;
+            }
+
+            y0 += ystep;
+            afrac += dx;
+
+            DM_DRAWLINE_INNER
+        }
+    }
+
+    return 0;
+}
+#endif
+
+#undef DM_DRAWLINE_NAME
+#undef DM_DRAWLINE_NAME_ASM
+#undef DM_DRAWLINE_NAME_C
+#undef DM_DRAWLINE_DST_BYTES
+#undef DM_DRAWLINE_DST_TYPE