Replace agg with skia

core/src/fxge/win32/agg_clip_liang_barsky.h

-
 //----------------------------------------------------------------------------
 // Anti-Grain Geometry - Version 2.3
 // Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
 //
 // Permission to copy, use, modify, sell and distribute this software
 // is granted provided this copyright notice appears in all copies.
 // This software is provided "as is" without express or implied
 // warranty, and with no claim as to its suitability for any purpose.
 //
 //----------------------------------------------------------------------------
 // Contact: mcseem@antigrain.com
 //          mcseemagg@yahoo.com
 //          http://www.antigrain.com
 //----------------------------------------------------------------------------
 //
 // Liang-Barsky clipping
 //
 //----------------------------------------------------------------------------
 #ifndef AGG_CLIP_LIANG_BARSKY_INCLUDED
 #define AGG_CLIP_LIANG_BARSKY_INCLUDED
-#include "agg_basics.h"
-namespace agg
-{
-template<class T>
-inline unsigned clipping_flags(T x, T y, const rect_base<T>& clip_box)
-{
-    return  (x > clip_box.x2) |
-            ((y > clip_box.y2) << 1) |
-            ((x < clip_box.x1) << 2) |
-            ((y < clip_box.y1) << 3);
-}
-template<class T>
-inline unsigned clip_liang_barsky(T x1, T y1, T x2, T y2,
-                                  const rect_base<T>& clip_box,
-                                  T* x, T* y)
+#include "../../../include/fxcrt/fx_coordinates.h"
+
+inline unsigned clip_liang_barsky(FX_FLOAT x1, FX_FLOAT y1, FX_FLOAT x2, FX_FLOAT y2,
+                                  const CFX_FloatRect& clip_box,
+                                  FX_FLOAT* x, FX_FLOAT* y)
 {
     const FX_FLOAT nearzero = 1e-30f;
     FX_FLOAT deltax = (FX_FLOAT)(x2 - x1);
     FX_FLOAT deltay = (FX_FLOAT)(y2 - y1);
     unsigned np = 0;
     if(deltax == 0) {
-        deltax = (x1 > clip_box.x1) ? -nearzero : nearzero;
+        deltax = (x1 > clip_box.left) ? -nearzero : nearzero;
     }
     FX_FLOAT xin, xout;
     if(deltax > 0) {
-        xin  = (FX_FLOAT)clip_box.x1;
-        xout = (FX_FLOAT)clip_box.x2;
+        xin  = (FX_FLOAT)clip_box.left;
+        xout = (FX_FLOAT)clip_box.right;
     } else {
-        xin  = (FX_FLOAT)clip_box.x2;
-        xout = (FX_FLOAT)clip_box.x1;
+        xin  = (FX_FLOAT)clip_box.right;
+        xout = (FX_FLOAT)clip_box.left;
     }
     FX_FLOAT tinx = FXSYS_Div(xin - x1, deltax);
     if(deltay == 0) {
-        deltay = (y1 > clip_box.y1) ? -nearzero : nearzero;
+        deltay = (y1 > clip_box.top) ? -nearzero : nearzero;
     }
     FX_FLOAT yin, yout;
     if(deltay > 0) {
-        yin  = (FX_FLOAT)clip_box.y1;
-        yout = (FX_FLOAT)clip_box.y2;
+        yin  = (FX_FLOAT)clip_box.top;
+        yout = (FX_FLOAT)clip_box.bottom;
     } else {
-        yin  = (FX_FLOAT)clip_box.y2;
-        yout = (FX_FLOAT)clip_box.y1;
+        yin  = (FX_FLOAT)clip_box.bottom;
+        yout = (FX_FLOAT)clip_box.top;
     }
     FX_FLOAT tiny = FXSYS_Div(yin - y1, deltay);
     FX_FLOAT tin1, tin2;
     if (tinx < tiny) {
         tin1 = tinx;
         tin2 = tiny;
     } else {
         tin1 = tiny;
         tin2 = tinx;
     }
     if(tin1 <= 1.0f) {
         if(0 < tin1) {
-            *x++ = (T)xin;
-            *y++ = (T)yin;
+            *x++ = xin;
+            *y++ = yin;
             ++np;
         }
         if(tin2 <= 1.0f) {
             FX_FLOAT toutx = FXSYS_Div(xout - x1, deltax);
             FX_FLOAT touty = FXSYS_Div(yout - y1, deltay);
             FX_FLOAT tout1 = (toutx < touty) ? toutx : touty;
             if(tin2 > 0 || tout1 > 0) {
                 if(tin2 <= tout1) {
                     if(tin2 > 0) {
                         if(tinx > tiny) {
-                            *x++ = (T)xin;
-                            *y++ = (T)(y1 + FXSYS_Mul(deltay, tinx));
+                            *x++ = xin;
+                            *y++ = (y1 + FXSYS_Mul(deltay, tinx));
                         } else {
-                            *x++ = (T)(x1 + FXSYS_Mul(deltax, tiny));
-                            *y++ = (T)yin;
+                            *x++ = (x1 + FXSYS_Mul(deltax, tiny));
+                            *y++ = yin;
                         }
                         ++np;
                     }
                     if(tout1 < 1.0f) {
                         if(toutx < touty) {
-                            *x++ = (T)xout;
-                            *y++ = (T)(y1 + FXSYS_Mul(deltay, toutx));
+                            *x++ = xout;
+                            *y++ = (y1 + FXSYS_Mul(deltay, toutx));
                         } else {
-                            *x++ = (T)(x1 + FXSYS_Mul(deltax, touty));
-                            *y++ = (T)yout;
+                            *x++ = (x1 + FXSYS_Mul(deltax, touty));
+                            *y++ = yout;
                         }
                     } else {
                         *x++ = x2;
                         *y++ = y2;
                     }
                     ++np;
                 } else {
                     if(tinx > tiny) {
-                        *x++ = (T)xin;
-                        *y++ = (T)yout;
+                        *x++ = xin;
+                        *y++ = yout;
                     } else {
-                        *x++ = (T)xout;
-                        *y++ = (T)yin;
+                        *x++ = xout;
+                        *y++ = yin;
                     }
                     ++np;
                 }
             }
         }
     }
     return np;
 }
-}
+
 #endif