src/third_party/skia/src/core/SkXfermode_proccoeff.h

   1 #ifndef SkXfermode_proccoeff_DEFINED
   2 #define SkXfermode_proccoeff_DEFINED
   3
   4 #include "SkXfermode.h"
   5 #include "SkReadBuffer.h"
   6 #include "SkWriteBuffer.h"
   7
   8 struct ProcCoeff {
   9     SkXfermodeProc      fProc;
  10     SkXfermode::Coeff   fSC;
  11     SkXfermode::Coeff   fDC;
  12 };
  13
  14 #define CANNOT_USE_COEFF    SkXfermode::Coeff(-1)
  15
  16 class SkProcCoeffXfermode : public SkProcXfermode {
  17 public:
  18     SkProcCoeffXfermode(const ProcCoeff& rec, Mode mode)
  19             : INHERITED(rec.fProc) {
  20         fMode = mode;
  21         // these may be valid, or may be CANNOT_USE_COEFF
  22         fSrcCoeff = rec.fSC;
  23         fDstCoeff = rec.fDC;
  24     }
  25
  26     virtual bool asMode(Mode* mode) const SK_OVERRIDE;
  27
  28     virtual bool asCoeff(Coeff* sc, Coeff* dc) const SK_OVERRIDE;
  29
  30 #if SK_SUPPORT_GPU
  31     virtual bool asNewEffect(GrEffectRef** effect,
  32                              GrTexture* background) const SK_OVERRIDE;
  33 #endif
  34
  35     SK_DEVELOPER_TO_STRING()
  36     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkProcCoeffXfermode)
  37
  38 protected:
  39     SkProcCoeffXfermode(SkReadBuffer& buffer);
  40
  41     virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE;
  42
  43     Mode getMode() const {
  44         return fMode;
  45     }
  46
  47 private:
  48     Mode    fMode;
  49     Coeff   fSrcCoeff, fDstCoeff;
  50
  51     typedef SkProcXfermode INHERITED;
  52 };
  53
  54 #endif // #ifndef SkXfermode_proccoeff_DEFINED