diff options
Diffstat (limited to 'src/smooth/ftgrays.c')
| -rw-r--r-- | src/smooth/ftgrays.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/smooth/ftgrays.c b/src/smooth/ftgrays.c index bab07a1ce..6a824c471 100644 --- a/src/smooth/ftgrays.c +++ b/src/smooth/ftgrays.c @@ -646,6 +646,9 @@ typedef ptrdiff_t FT_PtrDist; dx = -dx; } + /* the fractional part of y-delta is mod/dx. It is essential to */ + /* keep track of its accumulation for accurate rendering. */ + /* XXX: y-delta and x-delta below should be related. */ FT_DIV_MOD( TCoord, p, dx, delta, mod ); ras.area += (TArea)( ( fx1 + first ) * delta ); @@ -783,6 +786,8 @@ typedef ptrdiff_t FT_PtrDist; dy = -dy; } + /* the fractional part of x-delta is mod/dy. It is essential to */ + /* keep track of its accumulation for accurate rendering. */ FT_DIV_MOD( TCoord, p, dy, delta, mod ); x = ras.x + delta; |