shithub: freetype+ttf2subf

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Fix sdf computation while `USE_SQUARED_DISTANCES`.

Function `map_fixed_to_sdf` expects spread to be absolute
and not squared.

* src/sdf/ftbsdf.c (finalize_sdf): Pass absolute spread
while `map_fixed_to_sdf`.

* src/sdf/ftsdf.c (sdf_generate_bounding_box): Ditto.

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

--- a/src/sdf/ftbsdf.c

+++ b/src/sdf/ftbsdf.c

@@ -1096,7 +1096,7 @@

     FT_Int  i, j;

     FT_SDFFormat*  t_buffer;

-    FT_16D16       spread;

+    FT_16D16       sp_sq, spread;

     if ( !worker || !target )

@@ -1116,11 +1116,13 @@

       goto Exit;

     }

+    spread = FT_INT_16D16( worker->params.spread );

+

 #if USE_SQUARED_DISTANCES

-    spread = FT_INT_16D16( worker->params.spread *

-                           worker->params.spread );

+    sp_sq = FT_INT_16D16( worker->params.spread *

+                          worker->params.spread );

 #else

-    spread = FT_INT_16D16( worker->params.spread );

+    sp_sq = FT_INT_16D16( worker->params.spread );

 #endif

     for ( j = 0; j < r; j++ )

@@ -1136,8 +1138,8 @@

         index = j * w + i;

         dist  = worker->distance_map[index].dist;

-        if ( dist < 0 || dist > spread )

-          dist = spread;

+        if ( dist < 0 || dist > sp_sq )

+          dist = sp_sq;

 #if USE_SQUARED_DISTANCES

         dist = square_root( dist );

--- a/src/sdf/ftsdf.c

+++ b/src/sdf/ftsdf.c

@@ -3242,7 +3242,7 @@

     buffer   = (FT_SDFFormat*)bitmap->buffer;

     if ( USE_SQUARED_DISTANCES )

-      sp_sq = fixed_spread * fixed_spread;

+      sp_sq = FT_INT_16D16( spread * spread );

     else

       sp_sq = fixed_spread;