sw_engine: fix stroke join round result.

a trivial reversed value was returned that
brought the inverted arc drawing...

Change-Id: I928f05b3400772a367d1653496d385354032cbad

diff --git a/src/lib/sw_engine/tvgSwMath.cpp b/src/lib/sw_engine/tvgSwMath.cpp
index d2fcc4e..80c7f8e 100644 (file)
--- a/src/lib/sw_engine/tvgSwMath.cpp
+++ b/src/lib/sw_engine/tvgSwMath.cpp
@@ -295,7 +295,7 @@ int64_t mathMulDiv(int64_t a, int64_t b, int64_t c)
     }
     int64_t d = c > 0 ? (a * b + (c >> 1)) / c : 0x7FFFFFFFL;
 
-    return (s > 0 ? -d : d);
+    return (s > 0 ? d : -d);
 }
 
 

diff --git a/src/lib/sw_engine/tvgSwStroke.cpp b/src/lib/sw_engine/tvgSwStroke.cpp
index 8477d7c..e048ff5 100644 (file)
--- a/src/lib/sw_engine/tvgSwStroke.cpp
+++ b/src/lib/sw_engine/tvgSwStroke.cpp
@@ -134,7 +134,7 @@ static void _borderCubicTo(SwStrokeBorder* border, SwPoint& ctrl1, SwPoint& ctrl
 
 static void _borderArcTo(SwStrokeBorder* border, SwPoint& center, SwFixed radius, SwFixed angleStart, SwFixed angleDiff)
 {
-    constexpr auto ARC_CUBIC_ANGLE = ANGLE_PI / 2;
+    constexpr SwFixed ARC_CUBIC_ANGLE = ANGLE_PI / 2;
     SwPoint a = {radius, 0};
     mathRotate(a, angleStart);
     a += center;