diff options
Diffstat (limited to 'src/codec/SkSwizzler.h')
| -rw-r--r-- | src/codec/SkSwizzler.h | 33 |
1 files changed, 15 insertions, 18 deletions
diff --git a/src/codec/SkSwizzler.h b/src/codec/SkSwizzler.h index a7f29b0763..9bffccbb47 100644 --- a/src/codec/SkSwizzler.h +++ b/src/codec/SkSwizzler.h @@ -11,8 +11,9 @@ #include "SkCodec.h" #include "SkColor.h" #include "SkImageInfo.h" +#include "SkSampler.h" -class SkSwizzler : public SkNoncopyable { +class SkSwizzler : public SkSampler { public: /** * Enum describing the config of the source data. @@ -117,22 +118,17 @@ public: /** * Create a new SkSwizzler. * @param SrcConfig Description of the format of the source. - * @param dstInfo describes the destination. + * @param ctable Unowned pointer to an array of up to 256 colors for an + * index source. + * @param dstInfo Describes the destination. * @param ZeroInitialized Whether dst is zero-initialized. The - implementation may choose to skip writing zeroes + * implementation may choose to skip writing zeroes * if set to kYes_ZeroInitialized. - * @param srcInfo is the info of the source. Used to calculate the width samplesize. - * Width sampling is supported by the swizzler, by skipping pixels when - swizzling the row. Height sampling is not supported by the swizzler, - but is implemented in SkScaledCodec. - Sampling in Y can be done by a client with a scanline decoder, - but sampling in X allows the swizzler to skip swizzling pixels and - reading from and writing to memory. * @return A new SkSwizzler or nullptr on failure. */ static SkSwizzler* CreateSwizzler(SrcConfig, const SkPMColor* ctable, - const SkImageInfo& dstInfo, SkCodec::ZeroInitialized, - const SkImageInfo& srcInfo); + const SkImageInfo& dstInfo, SkCodec::ZeroInitialized); + /** * Fill the remainder of the destination with a single color * @@ -210,12 +206,13 @@ private: // deltaSrc is bytesPerPixel // else // deltaSrc is bitsPerPixel - const SkImageInfo fDstInfo; - int fCurrY; - const int fX0; // first X coord to sample - const int fSampleX; // step between X samples + const int fSrcWidth; // Width of the source - i.e. before any sampling. + int fDstWidth; // Width of dst, which may differ with sampling. + int fX0; // first X coord to sample + int fSampleX; // step between X samples + + SkSwizzler(RowProc proc, const SkPMColor* ctable, int deltaSrc, int srcWidth); - SkSwizzler(RowProc proc, const SkPMColor* ctable, int deltaSrc, const SkImageInfo& info, - int sampleX); + int onSetSampleX(int) override; }; #endif // SkSwizzler_DEFINED |