Replace agg with skia

core/src/fxge/agg/agg23/agg_clip_liang_barsky.h

Index: core/src/fxge/agg/agg23/agg_clip_liang_barsky.h
diff --git a/core/src/fxge/agg/agg23/agg_clip_liang_barsky.h b/core/src/fxge/agg/agg23/agg_clip_liang_barsky.h
deleted file mode 100644
index cfc4c91f607c2619d1e76d9178c6973fa29625b5..0000000000000000000000000000000000000000
--- a/core/src/fxge/agg/agg23/agg_clip_liang_barsky.h
+++ /dev/null
@@ -1,125 +0,0 @@
-
-//----------------------------------------------------------------------------
-// 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)
-{
-    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;
-    }
-    FX_FLOAT xin, xout;
-    if(deltax > 0) {
-        xin  = (FX_FLOAT)clip_box.x1;
-        xout = (FX_FLOAT)clip_box.x2;
-    } else {
-        xin  = (FX_FLOAT)clip_box.x2;
-        xout = (FX_FLOAT)clip_box.x1;
-    }
-    FX_FLOAT tinx = FXSYS_Div(xin - x1, deltax);
-    if(deltay == 0) {
-        deltay = (y1 > clip_box.y1) ? -nearzero : nearzero;
-    }
-    FX_FLOAT yin, yout;
-    if(deltay > 0) {
-        yin  = (FX_FLOAT)clip_box.y1;
-        yout = (FX_FLOAT)clip_box.y2;
-    } else {
-        yin  = (FX_FLOAT)clip_box.y2;
-        yout = (FX_FLOAT)clip_box.y1;
-    }
-    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;
-            ++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));
-                        } else {
-                            *x++ = (T)(x1 + FXSYS_Mul(deltax, tiny));
-                            *y++ = (T)yin;
-                        }
-                        ++np;
-                    }
-                    if(tout1 < 1.0f) {
-                        if(toutx < touty) {
-                            *x++ = (T)xout;
-                            *y++ = (T)(y1 + FXSYS_Mul(deltay, toutx));
-                        } else {
-                            *x++ = (T)(x1 + FXSYS_Mul(deltax, touty));
-                            *y++ = (T)yout;
-                        }
-                    } else {
-                        *x++ = x2;
-                        *y++ = y2;
-                    }
-                    ++np;
-                } else {
-                    if(tinx > tiny) {
-                        *x++ = (T)xin;
-                        *y++ = (T)yout;
-                    } else {
-                        *x++ = (T)xout;
-                        *y++ = (T)yin;
-                    }
-                    ++np;
-                }
-            }
-        }
-    }
-    return np;
-}
-}
-#endif