diff options
Diffstat (limited to 'freetype/src/smooth/ftgrays.c')
| -rw-r--r-- | freetype/src/smooth/ftgrays.c | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/freetype/src/smooth/ftgrays.c b/freetype/src/smooth/ftgrays.c index 926020a2c..f0db12380 100644 --- a/freetype/src/smooth/ftgrays.c +++ b/freetype/src/smooth/ftgrays.c @@ -1091,11 +1091,11 @@ typedef ptrdiff_t FT_PtrDist; if ( s > s_limit ) goto Split; - /* If P1 or P2 is outside P0-P3, split the curve. */ - if ( dy * dy1 + dx * dx1 < 0 || - dy * dy2 + dx * dx2 < 0 || - dy * (arc[3].y - arc[1].y) + dx * (arc[3].x - arc[1].x) < 0 || - dy * (arc[3].y - arc[2].y) + dx * (arc[3].x - arc[2].x) < 0 ) + /* Split super curvy segments where the off points are so far + from the chord that the angles P0-P1-P3 or P0-P2-P3 become + acute as detected by appropriate dot products. */ + if ( dx1 * ( dx1 - dx ) + dy1 * ( dy1 - dy ) > 0 || + dx2 * ( dx2 - dx ) + dy2 * ( dy2 - dy ) > 0 ) goto Split; /* No reason to split. */ @@ -1400,7 +1400,26 @@ typedef ptrdiff_t FT_PtrDist; ras.render_span( ras.span_y, ras.num_gray_spans, ras.gray_spans, ras.render_span_data ); +#ifdef FT_DEBUG_LEVEL_TRACE + + if ( ras.num_gray_spans > 0 ) + { + FT_Span* span; + int n; + + + FT_TRACE7(( "y = %3d ", ras.span_y )); + span = ras.gray_spans; + for ( n = 0; n < ras.num_gray_spans; n++, span++ ) + FT_TRACE7(( "[%d..%d]:%02x ", + span->x, span->x + span->len - 1, span->coverage )); + FT_TRACE7(( "\n" )); + } + FT_TRACE7(( "gray_sweep: end\n" )); + +#endif /* FT_DEBUG_LEVEL_TRACE */ + } |