Merge to XFA: Update bundled freetype to 2.6.1

third_party/freetype/src/base/fttrigon.c

Index: third_party/freetype/src/base/fttrigon.c
diff --git a/third_party/freetype/src/base/fttrigon.c b/third_party/freetype/src/base/fttrigon.c
index 9b2ccd5d61a85a9646fcc4d7ae491aca3863cbfa..5b24304c2fc81c9a8b7edd8bc1a565d72c7d1752 100644
--- a/third_party/freetype/src/base/fttrigon.c
+++ b/third_party/freetype/src/base/fttrigon.c
@@ -4,7 +4,7 @@
 /*                                                                         */
 /*    FreeType trigonometric functions (body).                             */
 /*                                                                         */
-/*  Copyright 2001-2005, 2012-2014 by                                      */
+/*  Copyright 2001-2015 by                                                 */
 /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
 /*                                                                         */
 /*  This file is part of the FreeType project, and may only be used,       */
@@ -73,7 +73,7 @@
     /* and CORDIC hypotenuse, so it minimizes the error       */
     val = (FT_Fixed)( ( (FT_Int64)val * FT_TRIG_SCALE + 0x40000000UL ) >> 32 );
 
-    return ( s >= 0 ) ? val : -val;
+    return s < 0 ? -val : val;
   }
 
 #else /* !FT_LONG64 */
@@ -92,8 +92,8 @@
        s = -1;
     }
 
-    lo1 = val & 0x0000FFFFU;
-    hi1 = val >> 16;
+    lo1 = (FT_UInt32)val & 0x0000FFFFU;
+    hi1 = (FT_UInt32)val >> 16;
     lo2 = FT_TRIG_SCALE & 0x0000FFFFU;
     hi2 = FT_TRIG_SCALE >> 16;
 
@@ -117,12 +117,12 @@
     /* and CORDIC hypotenuse, so it minimizes the error       */
 
     /* Check carry overflow of lo + 0x40000000 */
-    lo += 0x40000000U;
-    hi += ( lo < 0x40000000U );
+    lo += 0x40000000UL;
+    hi += ( lo < 0x40000000UL );
 
-    val  = (FT_Fixed)hi;
+    val = (FT_Fixed)hi;
 
-    return ( s >= 0 ) ? val : -val;
+    return s < 0 ? -val : val;
   }
 
 #endif /* !FT_LONG64 */
@@ -139,7 +139,7 @@
     x = vec->x;
     y = vec->y;
 
-    shift = FT_MSB( FT_ABS( x ) | FT_ABS( y ) );
+    shift = FT_MSB( (FT_UInt32)( FT_ABS( x ) | FT_ABS( y ) ) );
 
     if ( shift <= FT_TRIG_SAFE_MSB )
     {
@@ -299,11 +299,9 @@
     FT_Vector  v;
 
 
-    v.x = FT_TRIG_SCALE >> 8;
-    v.y = 0;
-    ft_trig_pseudo_rotate( &v, angle );
+    FT_Vector_Unit( &v, angle );
 
-    return ( v.x + 0x80L ) >> 8;
+    return v.x;
   }
 
 
@@ -312,7 +310,12 @@
   FT_EXPORT_DEF( FT_Fixed )
   FT_Sin( FT_Angle  angle )
   {
-    return FT_Cos( FT_ANGLE_PI2 - angle );
+    FT_Vector  v;
+
+
+    FT_Vector_Unit( &v, angle );
+
+    return v.y;
   }
 
 
@@ -324,9 +327,7 @@
     FT_Vector  v;
 
 
-    v.x = FT_TRIG_SCALE >> 8;
-    v.y = 0;
-    ft_trig_pseudo_rotate( &v, angle );
+    FT_Vector_Unit( &v, angle );
 
     return FT_DivFix( v.y, v.x );
   }
@@ -388,33 +389,32 @@
     FT_Vector  v;
 
 
-    if ( !vec )
+    if ( !vec || !angle )
       return;
 
-    v.x   = vec->x;
-    v.y   = vec->y;
+    v = *vec;
 
-    if ( angle && ( v.x != 0 || v.y != 0 ) )
-    {
-      shift = ft_trig_prenorm( &v );
-      ft_trig_pseudo_rotate( &v, angle );
-      v.x = ft_trig_downscale( v.x );
-      v.y = ft_trig_downscale( v.y );
+    if ( v.x == 0 && v.y == 0 )
+      return;
 
-      if ( shift > 0 )
-      {
-        FT_Int32  half = (FT_Int32)1L << ( shift - 1 );
+    shift = ft_trig_prenorm( &v );
+    ft_trig_pseudo_rotate( &v, angle );
+    v.x = ft_trig_downscale( v.x );
+    v.y = ft_trig_downscale( v.y );
 
+    if ( shift > 0 )
+    {
+      FT_Int32  half = (FT_Int32)1L << ( shift - 1 );
 
-        vec->x = ( v.x + half + FT_SIGN_LONG( v.x ) ) >> shift;
-        vec->y = ( v.y + half + FT_SIGN_LONG( v.y ) ) >> shift;
-      }
-      else
-      {
-        shift  = -shift;
-        vec->x = (FT_Pos)( (FT_ULong)v.x << shift );
-        vec->y = (FT_Pos)( (FT_ULong)v.y << shift );
-      }
+
+      vec->x = ( v.x + half + FT_SIGN_LONG( v.x ) ) >> shift;
+      vec->y = ( v.y + half + FT_SIGN_LONG( v.y ) ) >> shift;
+    }
+    else
+    {
+      shift  = -shift;
+      vec->x = (FT_Pos)( (FT_ULong)v.x << shift );
+      vec->y = (FT_Pos)( (FT_ULong)v.y << shift );
     }
   }
 
@@ -450,7 +450,7 @@
     v.x = ft_trig_downscale( v.x );
 
     if ( shift > 0 )
-      return ( v.x + ( 1 << ( shift - 1 ) ) ) >> shift;
+      return ( v.x + ( 1L << ( shift - 1 ) ) ) >> shift;
 
     return (FT_Fixed)( (FT_UInt32)v.x << -shift );
   }
@@ -480,8 +480,8 @@
 
     v.x = ft_trig_downscale( v.x );
 
-    *length = ( shift >= 0 ) ?                      ( v.x >>  shift )
-                             : (FT_Fixed)( (FT_UInt32)v.x << -shift );
+    *length = shift >= 0 ?                      ( v.x >>  shift )
+                         : (FT_Fixed)( (FT_UInt32)v.x << -shift );
     *angle  = v.y;
   }
 
@@ -512,11 +512,10 @@
     FT_Angle  delta = angle2 - angle1;
 
 
-    delta %= FT_ANGLE_2PI;
-    if ( delta < 0 )
+    while ( delta <= -FT_ANGLE_PI )
       delta += FT_ANGLE_2PI;
 
-    if ( delta > FT_ANGLE_PI )
+    while ( delta > FT_ANGLE_PI )
       delta -= FT_ANGLE_2PI;
 
     return delta;