SkSamplingPriv Class Reference

#include <SkSamplingPriv.h>

Static Public Member Functions
static size_t	FlatSize (const SkSamplingOptions &options)
static bool	NoChangeWithIdentityMatrix (const SkSamplingOptions &sampling)
static SkSamplingOptions	AnisoFallback (bool imageIsMipped)
static SkSamplingOptions	FromFQ (SkLegacyFQ fq, SkMediumAs behavior=kNearest_SkMediumAs)

Detailed Description

Definition at line 37 of file SkSamplingPriv.h.

Member Function Documentation

AnisoFallback()

static SkSamplingOptions SkSamplingPriv::AnisoFallback ( bool  imageIsMipped )

inlinestatic

Definition at line 59 of file SkSamplingPriv.h.

                                                               {
        auto mm = imageIsMipped ? SkMipmapMode::kLinear : SkMipmapMode::kNone;
        return SkSamplingOptions(SkFilterMode::kLinear, mm);
    }

FlatSize()

static size_t SkSamplingPriv::FlatSize ( const SkSamplingOptions &  options )

inlinestatic

Definition at line 39 of file SkSamplingPriv.h.

                                                             {
        size_t size = sizeof(uint32_t);  // maxAniso
        if (!options.isAniso()) {
            size += 3 * sizeof(uint32_t);  // bool32 + [2 floats | 2 ints]
        }
        return size;
    }

FromFQ()

static SkSamplingOptions SkSamplingPriv::FromFQ ( SkLegacyFQ  fq, SkMediumAs  behavior = kNearest_SkMediumAs  )

inlinestatic

Definition at line 64 of file SkSamplingPriv.h.

                                                                                              {
        switch (fq) {
            case kHigh_SkLegacyFQ:
                return SkSamplingOptions(SkCubicResampler{1/3.0f, 1/3.0f});
            case kMedium_SkLegacyFQ:
                return SkSamplingOptions(SkFilterMode::kLinear,
                                          behavior == kNearest_SkMediumAs ? SkMipmapMode::kNearest
                                                                          : SkMipmapMode::kLinear);
            case kLow_SkLegacyFQ:
                return SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kNone);
            case kNone_SkLegacyFQ:
                break;
        }
        return SkSamplingOptions(SkFilterMode::kNearest, SkMipmapMode::kNone);
    }

NoChangeWithIdentityMatrix()

static bool SkSamplingPriv::NoChangeWithIdentityMatrix ( const SkSamplingOptions &  sampling )

inlinestatic

Definition at line 48 of file SkSamplingPriv.h.

                                                                              {
        // If B == 0, the cubic resampler should have no effect for identity matrices
        // https://entropymine.com/imageworsener/bicubic/
        // We assume aniso has no effect with an identity transform.
        return !sampling.useCubic || sampling.cubic.B == 0;
    }

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

• third_party/skia/src/core/SkSamplingPriv.h