diff options
Diffstat (limited to 'source')
| -rw-r--r-- | source/fitz/draw-paint.c | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/source/fitz/draw-paint.c b/source/fitz/draw-paint.c index 0a58fd58..5735f615 100644 --- a/source/fitz/draw-paint.c +++ b/source/fitz/draw-paint.c @@ -1357,11 +1357,12 @@ template_span_1_with_alpha_general(byte * restrict dp, int da, const byte * rest do { int masa = (sa ? FZ_COMBINE(sp[1], alpha) : alpha); - *dp = FZ_BLEND(*sp, *dp, masa); + int t = FZ_EXPAND(255-masa); + *dp = FZ_COMBINE(*sp, alpha) + FZ_COMBINE(*dp, t); dp++; sp++; if (da) { - *dp = FZ_BLEND((sa ? *sp : 255), *dp, masa); + *dp = masa + FZ_COMBINE(*dp, t); dp++; } if (sa) @@ -1378,15 +1379,16 @@ template_span_3_with_alpha_general(byte * restrict dp, int da, const byte * rest do { int masa = (sa ? FZ_COMBINE(sp[3], alpha) : alpha); - *dp = FZ_BLEND(*sp, *dp, masa); + int t = FZ_EXPAND(255-masa); + *dp = FZ_COMBINE(*sp, alpha) + FZ_COMBINE(*dp, t); sp++; dp++; - *dp = FZ_BLEND(*sp, *dp, masa); + *dp = FZ_COMBINE(*sp, alpha) + FZ_COMBINE(*dp, t); sp++; dp++; - *dp = FZ_BLEND(*sp, *dp, masa); + *dp = FZ_COMBINE(*sp, alpha) + FZ_COMBINE(*dp, t); sp++; dp++; if (da) { - *dp = FZ_BLEND((sa ? *sp : 255), *dp, masa); + *dp = masa + FZ_COMBINE(*dp, t); dp++; } if (sa) @@ -1403,17 +1405,18 @@ template_span_4_with_alpha_general(byte * restrict dp, int da, const byte * rest do { int masa = (sa ? FZ_COMBINE(sp[4], alpha) : alpha); - *dp = FZ_BLEND(*sp, *dp, masa); + int t = FZ_EXPAND(255-masa); + *dp = FZ_COMBINE(*sp, alpha) + FZ_COMBINE(*dp, t); sp++; dp++; - *dp = FZ_BLEND(*sp, *dp, masa); + *dp = FZ_COMBINE(*sp, alpha) + FZ_COMBINE(*dp, t); sp++; dp++; - *dp = FZ_BLEND(*sp, *dp, masa); + *dp = FZ_COMBINE(*sp, alpha) + FZ_COMBINE(*dp, t); sp++; dp++; - *dp = FZ_BLEND(*sp, *dp, masa); + *dp = FZ_COMBINE(*sp, alpha) + FZ_COMBINE(*dp, t); sp++; dp++; if (da) { - *dp = FZ_BLEND((sa ? *sp : 255), *dp, masa); + *dp = masa + FZ_COMBINE(*dp, t); dp++; } if (sa) @@ -1431,15 +1434,16 @@ template_span_N_with_alpha_general(byte * restrict dp, int da, const byte * rest do { int masa = (sa ? FZ_COMBINE(sp[n1], alpha) : alpha); + int t = FZ_EXPAND(255-masa); int k; for (k = 0; k < n1; k++) { - *dp = FZ_BLEND(*sp, *dp, masa); + *dp = FZ_COMBINE(*sp, alpha) + FZ_COMBINE(*dp, t); sp++; dp++; } if (da) { - *dp = FZ_BLEND((sa ? *sp : 255), *dp, masa); + *dp = masa + FZ_COMBINE(*dp, t); dp++; } if (sa) @@ -1456,17 +1460,18 @@ template_span_N_with_alpha_general_op(byte * restrict dp, int da, const byte * r do { int masa = (sa ? FZ_COMBINE(sp[n1], alpha) : alpha); + int t = FZ_EXPAND(255-masa); int k; for (k = 0; k < n1; k++) { if (fz_overprint_component(eop, k)) - *dp = FZ_BLEND(*sp, *dp, masa); + *dp = FZ_COMBINE(*sp, alpha) + FZ_COMBINE(*dp, t); sp++; dp++; } if (da) { - *dp = FZ_BLEND((sa ? *sp : 255), *dp, masa); + *dp = masa + FZ_COMBINE(*dp, t); dp++; } if (sa) @@ -1731,7 +1736,8 @@ paint_span_0_da_sa_alpha(byte * restrict dp, int da, const byte * restrict sp, i do { int masa = FZ_COMBINE(sp[0], alpha); - *dp = FZ_BLEND(*sp, *dp, masa); + int t = FZ_EXPAND(255-masa); + *dp = masa + FZ_COMBINE(*dp, t); dp++; sp++; } |