void SkDrawPaint::setupPaint(SkPaint* paint) const {
if (antiAlias != -1)
paint->setAntiAlias(SkToBool(antiAlias));
if (color != NULL)
paint->setColor(color->getColor());
if (fakeBold != -1)
paint->setFakeBoldText(SkToBool(fakeBold));
if (filterBitmap != -1)
paint->setFilterLevel(filterBitmap ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel);
// stroke is legacy; style setting if present overrides stroke
if (stroke != -1)
paint->setStyle(SkToBool(stroke) ? SkPaint::kStroke_Style : SkPaint::kFill_Style);
if (style != -1)
paint->setStyle((SkPaint::Style) style);
if (linearText != -1)
paint->setLinearText(SkToBool(linearText));
if (maskFilter == NULL)
paint->setMaskFilter(NULL);
else if (maskFilter != (SkDrawMaskFilter*) -1)
SkSafeUnref(paint->setMaskFilter(maskFilter->getMaskFilter()));
if (pathEffect == NULL)
paint->setPathEffect(NULL);
else if (pathEffect != (SkDrawPathEffect*) -1)
SkSafeUnref(paint->setPathEffect(pathEffect->getPathEffect()));
if (shader == NULL)
paint->setShader(NULL);
else if (shader != (SkDrawShader*) -1)
SkSafeUnref(paint->setShader(shader->getShader()));
if (strikeThru != -1)
paint->setStrikeThruText(SkToBool(strikeThru));
if (strokeCap != -1)
paint->setStrokeCap((SkPaint::Cap) strokeCap);
if (strokeJoin != -1)
paint->setStrokeJoin((SkPaint::Join) strokeJoin);
if (SkScalarIsNaN(strokeMiter) == false)
paint->setStrokeMiter(strokeMiter);
if (SkScalarIsNaN(strokeWidth) == false)
paint->setStrokeWidth(strokeWidth);
if (textAlign != -1)
paint->setTextAlign((SkPaint::Align) textAlign);
if (SkScalarIsNaN(textScaleX) == false)
paint->setTextScaleX(textScaleX);
if (SkScalarIsNaN(textSize) == false)
paint->setTextSize(textSize);
if (SkScalarIsNaN(textSkewX) == false)
paint->setTextSkewX(textSkewX);
if (typeface == NULL)
paint->setTypeface(NULL);
else if (typeface != (SkDrawTypeface*) -1)
SkSafeUnref(paint->setTypeface(typeface->getTypeface()));
if (underline != -1)
paint->setUnderlineText(SkToBool(underline));
if (xfermode != -1)
paint->setXfermodeMode((SkXfermode::Mode) xfermode);
}
bool ValidPoints(const SkPoint* pts, int count) {
for (int index = 0; index < count; ++index) {
if (SkScalarIsNaN(pts[index].fX)) {
return false;
}
if (SkScalarIsNaN(pts[index].fY)) {
return false;
}
}
return true;
}
SkColor SkDrawColor::getColor() {
if (fDirty) {
if (SkScalarIsNaN(fValue) == false)
color = HSV_to_RGB(color, kGetValue, fValue);
if (SkScalarIsNaN(fSaturation) == false)
color = HSV_to_RGB(color, kGetSaturation, fSaturation);
if (SkScalarIsNaN(fHue) == false)
color = HSV_to_RGB(color, kGetHue, fHue);
fDirty = false;
}
return color;
}
bool ValidBounds(const SkPathOpsBounds& bounds) {
if (SkScalarIsNaN(bounds.fLeft)) {
return false;
}
if (SkScalarIsNaN(bounds.fTop)) {
return false;
}
if (SkScalarIsNaN(bounds.fRight)) {
return false;
}
return !SkScalarIsNaN(bounds.fBottom);
}
static void center_of_mass(const SegmentArray& segments, SkPoint* c) {
SkScalar area = 0;
SkPoint center = {0, 0};
int count = segments.count();
SkPoint p0 = {0, 0};
if (count > 2) {
// We translate the polygon so that the first point is at the origin.
// This avoids some precision issues with small area polygons far away
// from the origin.
p0 = segments[0].endPt();
SkPoint pi;
SkPoint pj;
// the first and last iteration of the below loop would compute
// zeros since the starting / ending point is (0,0). So instead we start
// at i=1 and make the last iteration i=count-2.
pj = segments[1].endPt() - p0;
for (int i = 1; i < count - 1; ++i) {
pi = pj;
const SkPoint pj = segments[i + 1].endPt() - p0;
SkScalar t = SkScalarMul(pi.fX, pj.fY) - SkScalarMul(pj.fX, pi.fY);
area += t;
center.fX += (pi.fX + pj.fX) * t;
center.fY += (pi.fY + pj.fY) * t;
}
}
// If the poly has no area then we instead return the average of
// its points.
if (SkScalarNearlyZero(area)) {
SkPoint avg;
avg.set(0, 0);
for (int i = 0; i < count; ++i) {
const SkPoint& pt = segments[i].endPt();
avg.fX += pt.fX;
avg.fY += pt.fY;
}
SkScalar denom = SK_Scalar1 / count;
avg.scale(denom);
*c = avg;
} else {
area *= 3;
area = SkScalarDiv(SK_Scalar1, area);
center.fX = SkScalarMul(center.fX, area);
center.fY = SkScalarMul(center.fY, area);
// undo the translate of p0 to the origin.
*c = center + p0;
}
SkASSERT(!SkScalarIsNaN(c->fX) && !SkScalarIsNaN(c->fY));
}
/** From Numerical Recipes in C.
Q = -1/2 (B + sign(B) sqrt[B*B - 4*A*C])
x1 = Q / A
x2 = C / Q
*/
int SkFindUnitQuadRoots(SkScalar A, SkScalar B, SkScalar C, SkScalar roots[2]) {
SkASSERT(roots);
if (A == 0) {
return valid_unit_divide(-C, B, roots);
}
SkScalar* r = roots;
SkScalar R = B*B - 4*A*C;
if (R < 0 || SkScalarIsNaN(R)) { // complex roots
return 0;
}
R = SkScalarSqrt(R);
SkScalar Q = (B < 0) ? -(B-R)/2 : -(B+R)/2;
r += valid_unit_divide(Q, A, r);
r += valid_unit_divide(C, Q, r);
if (r - roots == 2) {
if (roots[0] > roots[1])
SkTSwap<SkScalar>(roots[0], roots[1]);
else if (roots[0] == roots[1]) // nearly-equal?
r -= 1; // skip the double root
}
return (int)(r - roots);
}
bool SkAnimatorScript::IsNaN(const char* function, size_t len, SkTDArray<SkScriptValue>& params,
void* eng, SkScriptValue* value) {
if (SK_LITERAL_STR_EQUAL("isNaN", function, len) == false)
return false;
if (params.count() != 1)
return false;
SkScriptValue* scriptValue = params.begin();
value->fType = SkType_Int;
value->fOperand.fS32 = scriptValue->fType == SkType_Float ? SkScalarIsNaN(scriptValue->fOperand.fScalar) : 0;
return true;
}
bool SkDataInput::add() {
SkASSERT(name.size() > 0);
const char* dataName = name.c_str();
if (fInt != (int) SK_NaN32)
fParent->fEvent.setS32(dataName, fInt);
else if (SkScalarIsNaN(fFloat) == false)
fParent->fEvent.setScalar(dataName, fFloat);
else if (string.size() > 0)
fParent->fEvent.setString(dataName, string);
// else
// SkASSERT(0);
return false;
}
bool SkAnimatorScript::IsFinite(const char* function, size_t len, SkTDArray<SkScriptValue>& params,
void* eng, SkScriptValue* value) {
if (SK_LITERAL_STR_EQUAL(function, "isFinite", len) == false)
return false;
if (params.count() != 1)
return false;
SkScriptValue* scriptValue = params.begin();
SkDisplayTypes type = scriptValue->fType;
SkScalar scalar = scriptValue->fOperand.fScalar;
value->fType = SkType_Int;
value->fOperand.fS32 = type == SkType_Float ? SkScalarIsNaN(scalar) == false &&
SkScalarAbs(scalar) != SK_ScalarInfinity : type == SkType_Int;
return true;
}
sk_sp<SkShader> SkShader::MakeCompose(sk_sp<SkShader> dst, sk_sp<SkShader> src, SkBlendMode mode,
float lerpT) {
if (!src || !dst || SkScalarIsNaN(lerpT)) {
return nullptr;
}
lerpT = SkScalarPin(lerpT, 0, 1);
if (lerpT == 0) {
return dst;
} else if (lerpT == 1) {
if (mode == SkBlendMode::kSrc) {
return src;
}
if (mode == SkBlendMode::kDst) {
return dst;
}
}
return sk_sp<SkShader>(new SkComposeShader(std::move(dst), std::move(src), mode, lerpT));
}
bool SkDrawPath::getProperty(int index, SkScriptValue* value) const {
switch (index) {
case SK_PROPERTY(length):
if (SkScalarIsNaN(fLength)) {
const SkPath& path = ((SkDrawPath*) this)->getPath();
SkPathMeasure pathMeasure(path, false);
fLength = pathMeasure.getLength();
}
value->fType = SkType_Float;
value->fOperand.fScalar = fLength;
break;
case SK_PROPERTY(fillType):
value->fType = SkType_FillType;
value->fOperand.fS32 = (int) fPath.getFillType();
break;
default:
SkASSERT(0);
return false;
}
return true;
}
/** From Numerical Recipes in C.
Q = -1/2 (B + sign(B) sqrt[B*B - 4*A*C])
x1 = Q / A
x2 = C / Q
*/
int SkFindUnitQuadRoots(SkScalar A, SkScalar B, SkScalar C, SkScalar roots[2])
{
SkASSERT(roots);
if (A == 0)
return valid_unit_divide(-C, B, roots);
SkScalar* r = roots;
#ifdef SK_SCALAR_IS_FLOAT
float R = B*B - 4*A*C;
if (R < 0 || SkScalarIsNaN(R)) { // complex roots
return 0;
}
R = sk_float_sqrt(R);
#else
Sk64 RR, tmp;
RR.setMul(B,B);
tmp.setMul(A,C);
tmp.shiftLeft(2);
RR.sub(tmp);
if (RR.isNeg())
return 0;
SkFixed R = RR.getSqrt();
#endif
SkScalar Q = (B < 0) ? -(B-R)/2 : -(B+R)/2;
r += valid_unit_divide(Q, A, r);
r += valid_unit_divide(C, Q, r);
if (r - roots == 2)
{
if (roots[0] > roots[1])
SkTSwap<SkScalar>(roots[0], roots[1]);
else if (roots[0] == roots[1]) // nearly-equal?
r -= 1; // skip the double root
}
return (int)(r - roots);
}
static int valid_unit_divide(SkScalar numer, SkScalar denom, SkScalar* ratio) {
SkASSERT(ratio);
if (numer < 0) {
numer = -numer;
denom = -denom;
}
if (denom == 0 || numer == 0 || numer >= denom) {
return 0;
}
SkScalar r = SkScalarDiv(numer, denom);
if (SkScalarIsNaN(r)) {
return 0;
}
SkASSERT(r >= 0 && r < SK_Scalar1);
if (r == 0) { // catch underflow if numer <<<< denom
return 0;
}
*ratio = r;
return 1;
}
static void verify_floats(const float* floats, int count) {
for (int i = 0; i < count; ++i) {
SkASSERT(!SkScalarIsNaN(SkFloatToScalar(floats[i])));
}
}