diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/gui/painting/qcompositionfunctions.cpp | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/src/gui/painting/qcompositionfunctions.cpp b/src/gui/painting/qcompositionfunctions.cpp index 027bf23115..9308710c0b 100644 --- a/src/gui/painting/qcompositionfunctions.cpp +++ b/src/gui/painting/qcompositionfunctions.cpp @@ -1763,8 +1763,10 @@ void QT_FASTCALL comp_func_Lighten_rgb64(QRgba64 *Q_DECL_RESTRICT dest, const QR } /* - if Sca.Da + Dca.Sa >= Sa.Da + if Sca.Da + Dca.Sa > Sa.Da Dca' = Sa.Da + Sca.(1 - Da) + Dca.(1 - Sa) + else if Sca == Sa + Dca' = Dca.Sa + Sca.(1 - Da) + Dca.(1 - Sa) otherwise Dca' = Dca.Sa/(1-Sca/Sa) + Sca.(1 - Da) + Dca.(1 - Sa) */ @@ -1775,8 +1777,10 @@ static inline int color_dodge_op(int dst, int src, int da, int sa) const int src_da = src * da; const int temp = src * (255 - da) + dst * (255 - sa); - if (src_da + dst_sa >= sa_da) + if (src_da + dst_sa > sa_da) return qt_div_255(sa_da + temp); + else if (src == sa || sa == 0) + return qt_div_255(temp); else return qt_div_255(255 * dst_sa / (255 - 255 * src / sa) + temp); } @@ -1788,8 +1792,10 @@ static inline uint color_dodge_op_rgb64(qint64 dst, qint64 src, qint64 da, qint6 const qint64 src_da = src * da; const qint64 temp = src * (65535 - da) + dst * (65535 - sa); - if (src_da + dst_sa >= sa_da) + if (src_da + dst_sa > sa_da) return qt_div_65535(sa_da + temp); + else if (src == sa || sa == 0) + return qt_div_65535(temp); else return qt_div_65535(65535 * dst_sa / (65535 - 65535 * src / sa) + temp); } @@ -1915,8 +1921,10 @@ void QT_FASTCALL comp_func_ColorDodge_rgb64(QRgba64 *Q_DECL_RESTRICT dest, const } /* - if Sca.Da + Dca.Sa <= Sa.Da + if Sca.Da + Dca.Sa < Sa.Da Dca' = Sca.(1 - Da) + Dca.(1 - Sa) + else if Sca == 0 + Dca' = Dca.Sa + Sca.(1 - Da) + Dca.(1 - Sa) otherwise Dca' = Sa.(Sca.Da + Dca.Sa - Sa.Da)/Sca + Sca.(1 - Da) + Dca.(1 - Sa) */ @@ -1928,8 +1936,10 @@ static inline int color_burn_op(int dst, int src, int da, int sa) const int temp = src * (255 - da) + dst * (255 - sa); - if (src == 0 || src_da + dst_sa <= sa_da) + if (src_da + dst_sa < sa_da) return qt_div_255(temp); + else if (src == 0) + return qt_div_255(dst_sa + temp); return qt_div_255(sa * (src_da + dst_sa - sa_da) / src + temp); } @@ -1941,8 +1951,10 @@ static inline uint color_burn_op_rgb64(qint64 dst, qint64 src, qint64 da, qint64 const qint64 temp = src * (65535 - da) + dst * (65535 - sa); - if (src == 0 || src_da + dst_sa <= sa_da) + if (src_da + dst_sa < sa_da) return qt_div_65535(temp); + else if (src == 0) + return qt_div_65535(dst_sa + temp); return qt_div_65535(sa * (src_da + dst_sa - sa_da) / src + temp); } |