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      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 GrTexturePriv_DEFINED
      9 #define GrTexturePriv_DEFINED
     10 
     11 #include "GrTexture.h"
     12 
     13 /** Class that adds methods to GrTexture that are only intended for use internal to Skia.
     14     This class is purely a privileged window into GrTexture. It should never have additional data
     15     members or virtual methods.
     16     Non-static methods that are not trivial inlines should be spring-boarded (e.g. declared and
     17     implemented privately in GrTexture with a inline public method here). */
     18 class GrTexturePriv {
     19 public:
     20     void setFlag(GrSurfaceFlags flags) {
     21         fTexture->fDesc.fFlags = fTexture->fDesc.fFlags | flags;
     22     }
     23 
     24     void resetFlag(GrSurfaceFlags flags) {
     25         fTexture->fDesc.fFlags = fTexture->fDesc.fFlags & ~flags;
     26     }
     27 
     28     bool isSetFlag(GrSurfaceFlags flags) const {
     29         return 0 != (fTexture->fDesc.fFlags & flags);
     30     }
     31 
     32     void dirtyMipMaps(bool mipMapsDirty) { fTexture->dirtyMipMaps(mipMapsDirty); }
     33 
     34     bool mipMapsAreDirty() const {
     35         return GrTexture::kValid_MipMapsStatus != fTexture->fMipMapsStatus;
     36     }
     37 
     38     bool hasMipMaps() const {
     39         return GrTexture::kNotAllocated_MipMapsStatus != fTexture->fMipMapsStatus;
     40     }
     41 
     42     static void ComputeScratchKey(const GrSurfaceDesc&, GrScratchKey*);
     43 
     44     // TODO: Move this logic and the shift values out of here and to the callers.
     45     SkFixed normalizeFixedX(SkFixed x) const {
     46         SkASSERT(SkIsPow2(fTexture->fDesc.fWidth));
     47         return x >> fTexture->fShiftFixedX;
     48     }
     49 
     50     SkFixed normalizeFixedY(SkFixed y) const {
     51         SkASSERT(SkIsPow2(fTexture->fDesc.fHeight));
     52         return y >> fTexture->fShiftFixedY;
     53     }
     54 
     55 private:
     56     GrTexturePriv(GrTexture* texture) : fTexture(texture) { }
     57     GrTexturePriv(const GrTexturePriv& that) : fTexture(that.fTexture) { }
     58     GrTexturePriv& operator=(const GrTexturePriv&); // unimpl
     59 
     60     // No taking addresses of this type.
     61     const GrTexturePriv* operator&() const;
     62     GrTexturePriv* operator&();
     63 
     64     GrTexture* fTexture;
     65 
     66     friend class GrTexture; // to construct/copy this type.
     67 };
     68 
     69 inline GrTexturePriv GrTexture::texturePriv() { return GrTexturePriv(this); }
     70 
     71 inline const GrTexturePriv GrTexture::texturePriv () const {
     72     return GrTexturePriv(const_cast<GrTexture*>(this));
     73 }
     74 
     75 #endif
     76