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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 "GrExternalTextureData.h"
     12 #include "GrTexture.h"
     13 
     14 /** Class that adds methods to GrTexture that are only intended for use internal to Skia.
     15     This class is purely a privileged window into GrTexture. It should never have additional data
     16     members or virtual methods.
     17     Non-static methods that are not trivial inlines should be spring-boarded (e.g. declared and
     18     implemented privately in GrTexture with a inline public method here). */
     19 class GrTexturePriv {
     20 public:
     21     void setFlag(GrSurfaceFlags flags) {
     22         fTexture->fDesc.fFlags = fTexture->fDesc.fFlags | flags;
     23     }
     24 
     25     void resetFlag(GrSurfaceFlags flags) {
     26         fTexture->fDesc.fFlags = fTexture->fDesc.fFlags & ~flags;
     27     }
     28 
     29     bool isSetFlag(GrSurfaceFlags flags) const {
     30         return 0 != (fTexture->fDesc.fFlags & flags);
     31     }
     32 
     33     void dirtyMipMaps(bool mipMapsDirty) {
     34         fTexture->dirtyMipMaps(mipMapsDirty);
     35     }
     36 
     37     bool mipMapsAreDirty() const {
     38         return GrTexture::kValid_MipMapsStatus != fTexture->fMipMapsStatus;
     39     }
     40 
     41     bool hasMipMaps() const {
     42         return GrTexture::kNotAllocated_MipMapsStatus != fTexture->fMipMapsStatus;
     43     }
     44 
     45     void setMaxMipMapLevel(int maxMipMapLevel) const {
     46         fTexture->fMaxMipMapLevel = maxMipMapLevel;
     47     }
     48 
     49     int maxMipMapLevel() const {
     50         return fTexture->fMaxMipMapLevel;
     51     }
     52 
     53     GrSLType imageStorageType() const {
     54         if (GrPixelConfigIsSint(fTexture->config())) {
     55             return kIImageStorage2D_GrSLType;
     56         } else {
     57             return kImageStorage2D_GrSLType;
     58         }
     59     }
     60 
     61     GrSLType samplerType() const { return fTexture->fSamplerType; }
     62 
     63     /** The filter used is clamped to this value in GrProcessor::TextureSampler. */
     64     GrSamplerParams::FilterMode highestFilterMode() const { return fTexture->fHighestFilterMode; }
     65 
     66     void setMipColorMode(SkDestinationSurfaceColorMode colorMode) const {
     67         fTexture->fMipColorMode = colorMode;
     68     }
     69     SkDestinationSurfaceColorMode mipColorMode() const { return fTexture->fMipColorMode; }
     70 
     71     /**
     72      *  Return the native bookkeeping data for this texture, and detach the backend object from
     73      *  this GrTexture. It's lifetime will no longer be managed by Ganesh, and this GrTexture will
     74      *  no longer refer to it. Leaves this GrTexture in an orphan state.
     75      */
     76     std::unique_ptr<GrExternalTextureData> detachBackendTexture() {
     77         return fTexture->detachBackendTexture();
     78     }
     79 
     80     static void ComputeScratchKey(const GrSurfaceDesc&, GrScratchKey*);
     81 
     82 private:
     83     GrTexturePriv(GrTexture* texture) : fTexture(texture) { }
     84     GrTexturePriv(const GrTexturePriv& that) : fTexture(that.fTexture) { }
     85     GrTexturePriv& operator=(const GrTexturePriv&); // unimpl
     86 
     87     // No taking addresses of this type.
     88     const GrTexturePriv* operator&() const;
     89     GrTexturePriv* operator&();
     90 
     91     GrTexture* fTexture;
     92 
     93     friend class GrTexture; // to construct/copy this type.
     94 };
     95 
     96 inline GrTexturePriv GrTexture::texturePriv() { return GrTexturePriv(this); }
     97 
     98 inline const GrTexturePriv GrTexture::texturePriv () const {
     99     return GrTexturePriv(const_cast<GrTexture*>(this));
    100 }
    101 
    102 #endif
    103