diff options
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | src/smooth/ftgrays.c | 27 |
2 files changed, 18 insertions, 16 deletions
@@ -1,3 +1,10 @@ +2019-04-26 Alexei Podtelezhnikov <apodtele@gmail.com> + + [smooth] Bithacks and cosmetics. + + * src/smooth/ftgrays.c (gray_record_cell, gray_set_cell, gray_hline, + gray_render_conic, gray_convert_glyph_inner): Updated. + 2019-04-25 Alexei Podtelezhnikov <apodtele@gmail.com> Optimize Bézier bisections. diff --git a/src/smooth/ftgrays.c b/src/smooth/ftgrays.c index 82cd44598..b421fc8f4 100644 --- a/src/smooth/ftgrays.c +++ b/src/smooth/ftgrays.c @@ -516,7 +516,7 @@ typedef ptrdiff_t FT_PtrDist; /************************************************************************** * - * Record the current cell in the table. + * Record the current cell in the linked list. */ static void gray_record_cell( RAS_ARG ) @@ -526,10 +526,9 @@ typedef ptrdiff_t FT_PtrDist; pcell = &ras.ycells[ras.ey - ras.min_ey]; - for (;;) + while ( ( cell = *pcell ) ) { - cell = *pcell; - if ( !cell || cell->x > x ) + if ( cell->x > x ) break; if ( cell->x == x ) @@ -577,16 +576,13 @@ typedef ptrdiff_t FT_PtrDist; /* Note that if a cell is to the left of the clipping region, it is */ /* actually set to the (min_ex-1) horizontal position. */ - if ( ex < ras.min_ex ) - ex = ras.min_ex - 1; - /* record the current one if it is valid and substantial */ if ( !ras.invalid && ( ras.area || ras.cover ) ) gray_record_cell( RAS_VAR ); ras.area = 0; ras.cover = 0; - ras.ex = ex; + ras.ex = FT_MAX( ex, ras.min_ex - 1 ); ras.ey = ey; ras.invalid = ( ey >= ras.max_ey || ey < ras.min_ey || @@ -1044,12 +1040,11 @@ typedef ptrdiff_t FT_PtrDist; /* many times as there are trailing zeros in the counter. */ do { - split = 1; - while ( ( draw & split ) == 0 ) + split = draw & ( -draw ); /* isolate the rightmost 1-bit */ + while ( ( split >>= 1 ) ) { gray_split_conic( arc ); arc += 2; - split <<= 1; } gray_render_line( RAS_VAR_ arc[0].x, arc[0].y ); @@ -1242,8 +1237,6 @@ typedef ptrdiff_t FT_PtrDist; { /* scale the coverage from 0..(ONE_PIXEL*ONE_PIXEL*2) to 0..256 */ coverage >>= PIXEL_BITS * 2 + 1 - 8; - if ( coverage < 0 ) - coverage = -coverage - 1; /* compute the line's coverage depending on the outline fill rule */ if ( ras.outline.flags & FT_OUTLINE_EVEN_ODD_FILL ) @@ -1253,9 +1246,11 @@ typedef ptrdiff_t FT_PtrDist; if ( coverage >= 256 ) coverage = 511 - coverage; } - else + else /* default non-zero winding rule */ { - /* normal non-zero winding rule */ + if ( coverage < 0 ) + coverage = ~coverage; /* the same as -coverage - 1 */ + if ( coverage >= 256 ) coverage = 255; } @@ -1637,7 +1632,7 @@ typedef ptrdiff_t FT_PtrDist; gray_convert_glyph_inner( RAS_ARG, int continued ) { - volatile int error = 0; + int error; if ( ft_setjmp( ras.jump_buffer ) == 0 ) |