diff options
Diffstat (limited to 'src/gui')
| -rw-r--r-- | src/gui/painting/qdrawhelper.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/gui/painting/qdrawhelper.cpp b/src/gui/painting/qdrawhelper.cpp index ee0e17d917..3cff7386e1 100644 --- a/src/gui/painting/qdrawhelper.cpp +++ b/src/gui/painting/qdrawhelper.cpp @@ -2407,6 +2407,7 @@ static inline SourceFetchProc64 getSourceFetch64(TextureBlendType blendType, QIm #define FIXPT_BITS 8 #define FIXPT_SIZE (1<<FIXPT_BITS) +#define FIXPT_MAX (INT_MAX >> (FIXPT_BITS + 1)) static uint qt_gradient_pixel_fixed(const QGradientData *data, int fixed_pos) { @@ -2503,10 +2504,12 @@ static inline const BlendType * QT_FASTCALL qt_fetch_linear_gradient_template( const BlendType *end = buffer + length; if (affine) { if (inc > qreal(-1e-5) && inc < qreal(1e-5)) { - GradientBase::memfill(buffer, GradientBase::fetchSingle(data->gradient, int(t * FIXPT_SIZE)), length); + if (std::abs(t) < FIXPT_MAX) + GradientBase::memfill(buffer, GradientBase::fetchSingle(data->gradient, int(t * FIXPT_SIZE)), length); + else + GradientBase::memfill(buffer, GradientBase::fetchSingle(data->gradient, t / GRADIENT_STOPTABLE_SIZE), length); } else { - if (t+inc*length < qreal(INT_MAX >> (FIXPT_BITS + 1)) && - t+inc*length > qreal(INT_MIN >> (FIXPT_BITS + 1))) { + if (std::abs(t) < FIXPT_MAX && std::abs(inc) < FIXPT_MAX && std::abs(t + inc * length) < FIXPT_MAX) { // we can use fixed point math int t_fixed = int(t * FIXPT_SIZE); int inc_fixed = int(inc * FIXPT_SIZE); |