}
bool SkBitmapProcState::setupForTranslate() {
-#ifdef SK_SUPPORT_LEGACY_SAMPLER_BIAS
SkPoint pt;
- fInvProc(fInvMatrix, SK_ScalarHalf, SK_ScalarHalf, &pt);
- const SkScalar too_big = SkIntToScalar(1 << 30);
- if (SkScalarAbs(pt.fX) > too_big || SkScalarAbs(pt.fY) > too_big) {
- return false;
- }
-
- fFilterOneX = SkScalarFloorToInt(pt.fX);
- fFilterOneY = SkScalarFloorToInt(pt.fY);
+#ifdef SK_SUPPORT_LEGACY_SAMPLER_BIAS
+ fInvProc(fInvMatrix, SK_ScalarHalf, SK_ScalarHalf, &pt);
#else
- SkBitmapProcStateAutoMapper mapper(*this, 0, 0);
+ const SkBitmapProcStateAutoMapper mapper(*this, 0, 0, &pt);
+#endif
/*
* if the translate is larger than our ints, we can get random results, or
* worse, we might get 0x80000000, which wreaks havoc on us, since we can't
* negate it.
*/
- if (mapper.isOverflow()) {
+ const SkScalar too_big = SkIntToScalar(1 << 30);
+ if (SkScalarAbs(pt.fX) > too_big || SkScalarAbs(pt.fY) > too_big) {
return false;
}
+#ifdef SK_SUPPORT_LEGACY_SAMPLER_BIAS
+ fFilterOneX = SkScalarFloorToInt(pt.fX);
+ fFilterOneY = SkScalarFloorToInt(pt.fY);
+#else
// Since we know we're not filtered, we re-purpose these fields allow
// us to go from device -> src coordinates w/ just an integer add,
// rather than running through the inverse-matrix
// TODO: filtered version which applies a fFilterOne{X,Y}/2 bias instead of epsilon?
class SkBitmapProcStateAutoMapper {
public:
- SkBitmapProcStateAutoMapper(const SkBitmapProcState& s, int x, int y) {
+ SkBitmapProcStateAutoMapper(const SkBitmapProcState& s, int x, int y,
+ SkPoint* scalarPoint = nullptr) {
SkPoint pt;
s.fInvProc(s.fInvMatrix,
SkIntToScalar(x) + SK_ScalarHalf,
fX = SkScalarToFractionalInt(pt.x()) - SkFixedToFractionalInt(biasX);
fY = SkScalarToFractionalInt(pt.y()) - SkFixedToFractionalInt(biasY);
- /*
- * (see SkBitmapProcState::setupForTranslate, which is the only user of this flag)
- *
- * if the translate is larger than our ints, we can get random results, or
- * worse, we might get 0x80000000, which wreaks havoc on us, since we can't
- * negate it.
- */
- const SkScalar too_big = SkIntToScalar(1 << 30);
- fOverflow = SkScalarAbs(pt.x() - SkFixedToScalar(biasX)) > too_big
- || SkScalarAbs(pt.y() - SkFixedToScalar(biasY)) > too_big;
+ if (scalarPoint) {
+ scalarPoint->set(pt.x() - SkFixedToScalar(biasX),
+ pt.y() - SkFixedToScalar(biasY));
+ }
}
SkFractionalInt x() const { return fX; }
SkFractionalInt y() const { return fY; }
- bool isOverflow() const { return fOverflow; }
-
private:
SkFractionalInt fX, fY;
- bool fOverflow;
};
#endif