// Returns whether or not the gpu can fast path the dash line effect.
static bool can_fast_path_dash(const SkPoint pts[2], const GrStrokeInfo& strokeInfo,
const GrDrawTarget& target, const SkMatrix& viewMatrix) {
if (target.getDrawState().getRenderTarget()->isMultisampled()) {
return false;
}
// Pts must be either horizontal or vertical in src space
if (pts[0].fX != pts[1].fX && pts[0].fY != pts[1].fY) {
return false;
}
// May be able to relax this to include skew. As of now cannot do perspective
// because of the non uniform scaling of bloating a rect
if (!viewMatrix.preservesRightAngles()) {
return false;
}
if (!strokeInfo.isDashed() || 2 != strokeInfo.dashCount()) {
return false;
}
const SkPathEffect::DashInfo& info = strokeInfo.getDashInfo();
if (0 == info.fIntervals[0] && 0 == info.fIntervals[1]) {
return false;
}
SkPaint::Cap cap = strokeInfo.getStrokeRec().getCap();
// Current we do don't handle Round or Square cap dashes
if (SkPaint::kRound_Cap == cap && info.fIntervals[0] != 0.f) {
return false;
}
return true;
}
static inline bool single_pass_path(const GrDrawTarget& target,
const GrPath& path,
GrPathFill fill) {
#if STENCIL_OFF
return true;
#else
if (kEvenOdd_PathFill == fill) {
GrConvexHint hint = getConvexHint(path);
return hint == kConvex_ConvexHint ||
hint == kNonOverlappingConvexPieces_ConvexHint;
} else if (kWinding_PathFill == fill) {
GrConvexHint hint = getConvexHint(path);
return hint == kConvex_ConvexHint ||
hint == kNonOverlappingConvexPieces_ConvexHint ||
(hint == kSameWindingConvexPieces_ConvexHint &&
!target.drawWillReadDst() &&
!target.getDrawState().isDitherState());
}
return false;
#endif
}
