SkTrimPathEffect Class Reference

#include <SkTrimPathEffect.h>

Public Types
enum class	Mode { kNormal , kInverted }

Static Public Member Functions
static sk_sp< SkPathEffect >	Make (SkScalar startT, SkScalar stopT, Mode=Mode::kNormal)

Detailed Description

Definition at line 17 of file SkTrimPathEffect.h.

Member Enumeration Documentation

Mode

enum class SkTrimPathEffect::Mode

strong

Enumerator
kNormal
kInverted

Definition at line 19 of file SkTrimPathEffect.h.

                    {
        kNormal,   // return the subset path [start,stop]
        kInverted, // return the complement/subset paths [0,start] + [stop,1]
    };

Member Function Documentation

Make()

sk_sp< SkPathEffect > SkTrimPathEffect::Make ( SkScalar  startT, SkScalar  stopT, Mode  mode = Mode::kNormal  )

static

Take start and stop "t" values (values between 0...1), and return a path that is that subset of the original path.

e.g. Make(0.5, 1.0) --> return the 2nd half of the path Make(0.33333, 0.66667) --> return the middle third of the path

The trim values apply to the entire path, so if it contains several contours, all of them are including in the calculation.

startT and stopT must be 0..1 inclusive. If they are outside of that interval, they will be pinned to the nearest legal value. If either is NaN, null will be returned.

Note: for Mode::kNormal, this will return one (logical) segment (even if it is spread across multiple contours). For Mode::kInverted, this will return 2 logical segments: stopT..1 and 0...startT, in this order.

Definition at line 133 of file SkTrimPathEffect.cpp.

                                                                                     {
    if (!SkIsFinite(startT, stopT)) {
        return nullptr;
    }
 
    if (startT <= 0 && stopT >= 1 && mode == Mode::kNormal) {
        return nullptr;
    }
 
    startT = SkTPin(startT, 0.f, 1.f);
    stopT  = SkTPin(stopT,  0.f, 1.f);
 
    if (startT >= stopT && mode == Mode::kInverted) {
        return nullptr;
    }
 
    return sk_sp<SkPathEffect>(new SkTrimPE(startT, stopT, mode));
}

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The documentation for this class was generated from the following files:

• third_party/skia/include/effects/SkTrimPathEffect.h
• third_party/skia/src/effects/SkTrimPathEffect.cpp