src/gpu/effects/GrDisableColorXP.h

   1 /*
   2  * Copyright 2014 Google Inc.
   3  *
   4  * Use of this source code is governed by a BSD-style license that can be
   5  * found in the LICENSE file.
   6  */
   7
   8 #ifndef GrDisableColorXP_DEFINED
   9 #define GrDisableColorXP_DEFINED
  10
  11 #include "GrTypes.h"
  12 #include "GrXferProcessor.h"
  13
  14 class GrProcOptInfo;
  15
  16 class GrDisableColorXPFactory : public GrXPFactory {
  17 public:
  18     static GrXPFactory* Create() {
  19         return SkNEW(GrDisableColorXPFactory);
  20     }
  21
  22     bool supportsRGBCoverage(GrColor knownColor, uint32_t knownColorFlags) const SK_OVERRIDE {
  23         return true;
  24     }
  25
  26     bool canTweakAlphaForCoverage() const SK_OVERRIDE { return true; }
  27
  28     void getInvariantOutput(const GrProcOptInfo& colorPOI, const GrProcOptInfo& coveragePOI,
  29                             GrXPFactory::InvariantOutput* output) const SK_OVERRIDE {
  30         output->fBlendedColorFlags = 0;
  31         output->fWillBlendWithDst = 0;
  32     }
  33
  34 private:
  35     GrDisableColorXPFactory();
  36
  37     GrXferProcessor* onCreateXferProcessor(const GrDrawTargetCaps& caps,
  38                                            const GrProcOptInfo& colorPOI,
  39                                            const GrProcOptInfo& coveragePOI,
  40                                            const GrDeviceCoordTexture* dstCopy) const SK_OVERRIDE;
  41
  42     bool willReadDstColor(const GrDrawTargetCaps& caps,
  43                           const GrProcOptInfo& colorPOI,
  44                           const GrProcOptInfo& coveragePOI) const SK_OVERRIDE {
  45         return false;
  46     }
  47
  48     bool onIsEqual(const GrXPFactory& xpfBase) const SK_OVERRIDE {
  49         return true;
  50     }
  51
  52     GR_DECLARE_XP_FACTORY_TEST;
  53
  54     typedef GrXPFactory INHERITED;
  55 };
  56
  57 #endif
  58