shithub: freetype+ttf2subf

Info  •  Files  •  Log  •  Branches

[base] Clean up emboldening code and improve comments there.

* src/base/ftoutln.c (FT_Outline_EmboldenXY): Replace sequential
calls to FT_MulFix and FT_DivFix with FT_MulDiv.
Mention that bisectors are used to figure out the shift direction.

git/fs: mount .git/fs: mount/attach disallowed

--- a/ChangeLog

+++ b/ChangeLog

@@ -1,3 +1,11 @@

+2012-11-03  Alexei Podtelezhnikov  <[email protected]>

+

+	[base] Clean up emboldening code and improve comments there.

+

+	* src/base/ftoutln.c (FT_Outline_EmboldenXY): Replace sequential

+	calls to FT_MulFix and FT_DivFix with FT_MulDiv.

+	Mention that bisectors are used to figure out the shift direction.

+

 2012-10-24  Werner Lemberg  <[email protected]>

 	[autofit] Add standard character to `AF_ScriptClassRec' structure.

--- a/src/base/ftoutln.c

+++ b/src/base/ftoutln.c

@@ -952,9 +952,10 @@

         /* shift only if turn is less then ~160 degrees */

         if ( 16 * d > l_in * l_out )

         {

-          /* shift components are rotated */

-          shift.x = FT_DivFix( l_out * in.y + l_in * out.y, d );

-          shift.y = FT_DivFix( l_out * in.x + l_in * out.x, d );

+          /* shift components are aligned along bisector        */

+          /* and directed according to the outline orientation. */

+          shift.x = l_out * in.y + l_in * out.y;

+          shift.y = l_out * in.x + l_in * out.x;

           if ( orientation == FT_ORIENTATION_TRUETYPE )

             shift.x = -shift.x;

@@ -961,8 +962,8 @@

           else

             shift.y = -shift.y;

-          shift.x = FT_MulFix( xstrength, shift.x );

-          shift.y = FT_MulFix( ystrength, shift.y );

+          shift.x = FT_MulDiv( shift.x, xstrength, d );

+          shift.y = FT_MulDiv( shift.y, ystrength, d );

         }

         else

           shift.x = shift.y = 0;