SkUnitScalar SkPoint3D::normalize(SkUnit3D* unit) const
{
#ifdef SK_SCALAR_IS_FLOAT
float mag = sk_float_sqrt(fX*fX + fY*fY + fZ*fZ);
if (mag)
{
float scale = 1.0f / mag;
unit->fX = fX * scale;
unit->fY = fY * scale;
unit->fZ = fZ * scale;
}
#else
Sk64 tmp1, tmp2;
tmp1.setMul(fX, fX);
tmp2.setMul(fY, fY);
tmp1.add(tmp2);
tmp2.setMul(fZ, fZ);
tmp1.add(tmp2);
SkFixed mag = tmp1.getSqrt();
if (mag)
{
// what if mag < SK_Fixed1 ??? we will underflow the fixdiv
SkFixed scale = SkFixedDiv(SK_Fract1, mag);
unit->fX = SkFixedMul(fX, scale);
unit->fY = SkFixedMul(fY, scale);
unit->fZ = SkFixedMul(fZ, scale);
}
#endif
return mag;
}
void SkProgressView::onDraw(SkCanvas* canvas)
{
if (fMax == 0)
return;
SkFixed percent;
if (fInterp)
{
SkScalar x;
if (fInterp->timeToValues(SkTime::GetMSecs(), &x) == SkInterpolator::kFreezeEnd_Result)
{
delete fInterp;
fInterp = NULL;
}
percent = (SkFixed)x; // now its 16.8
percent = SkMax32(0, SkMin32(percent, fMax << 8)); // now its pinned
percent = SkFixedDiv(percent, fMax << 8); // now its 0.16
this->inval(NULL);
}
else
{
U16CPU value = SkMax32(0, SkMin32(fValue, fMax));
percent = SkFixedDiv(value, fMax);
}
SkRect r;
SkPaint p;
r.set(0, 0, this->width(), this->height());
p.setAntiAlias(true);
r.fRight = r.fLeft + SkScalarMul(r.width(), SkFixedToScalar(percent));
p.setStyle(SkPaint::kFill_Style);
p.setColor(SK_ColorDKGRAY);
p.setShader(fOnShader);
canvas->drawRect(r, p);
p.setColor(SK_ColorWHITE);
p.setShader(fOffShader);
r.fLeft = r.fRight;
r.fRight = this->width() - SK_Scalar1;
if (r.width() > 0)
canvas->drawRect(r, p);
}
static inline SkFixed quickSkFDot6Div(SkFDot6 a, SkFDot6 b) {
if (SkAbs32(b) < kInverseTableSize) {
SkASSERT((int64_t)a * QuickFDot6Inverse::Lookup(b) <= SK_MaxS32);
SkFixed ourAnswer = (a * QuickFDot6Inverse::Lookup(b)) >> 6;
#ifdef SK_DEBUG
SkFixed directAnswer = SkFDot6Div(a, b);
SkASSERT(
(directAnswer == 0 && ourAnswer == 0) ||
SkFixedDiv(SkAbs32(directAnswer - ourAnswer), SkAbs32(directAnswer)) <= 1 << 10
);
#endif
return ourAnswer;
} else {
void SkSliderView::onDraw(SkCanvas* canvas)
{
this->INHERITED::onDraw(canvas);
U16CPU value = SkMax32(0, SkMin32(fValue, fMax));
SkRect r;
SkPaint p;
r.set(0, 0, this->width(), this->height());
p.setAntiAliasOn(true);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(SK_Scalar1);
r.inset(SK_Scalar1/2, SK_Scalar1/2);
canvas->drawRect(r, p);
if (fMax)
{
SkFixed percent = SkFixedDiv(value, fMax);
r.inset(SK_Scalar1/2, SK_Scalar1/2);
r.fRight = r.fLeft + SkScalarMul(r.width(), SkFixedToScalar(percent));
p.setStyle(SkPaint::kFill_Style);
setgrad(&p, r);
canvas->drawRect(r, p);
}
#if 0
r.set(0, 0, this->width(), this->height());
r.inset(SK_Scalar1, SK_Scalar1);
r.inset(r.width()/2, 0);
p.setColor(SK_ColorBLACK);
canvas->drawLine(*(SkPoint*)&r.fLeft, *(SkPoint*)&r.fRight, p);
#endif
}
