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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 
      9 #ifndef GrTexture_DEFINED
     10 #define GrTexture_DEFINED
     11 
     12 #include "GrSurface.h"
     13 #include "GrSamplerParams.h"
     14 #include "SkPoint.h"
     15 #include "SkRefCnt.h"
     16 
     17 class GrTexturePriv;
     18 
     19 class GrTexture : virtual public GrSurface {
     20 public:
     21     GrTexture* asTexture() override { return this; }
     22     const GrTexture* asTexture() const override { return this; }
     23 
     24     /**
     25      *  Return the native ID or handle to the texture, depending on the
     26      *  platform. e.g. on OpenGL, return the texture ID.
     27      */
     28     virtual GrBackendObject getTextureHandle() const = 0;
     29 
     30     /**
     31      * This function indicates that the texture parameters (wrap mode, filtering, ...) have been
     32      * changed externally to Skia.
     33      */
     34     virtual void textureParamsModified() = 0;
     35 
     36 #ifdef SK_DEBUG
     37     void validate() const {
     38         this->INHERITED::validate();
     39     }
     40 #endif
     41 
     42     // These match the definitions in SkImage, for whence they came
     43     typedef void* ReleaseCtx;
     44     typedef void (*ReleaseProc)(ReleaseCtx);
     45 
     46     virtual void setRelease(ReleaseProc proc, ReleaseCtx ctx) = 0;
     47 
     48     /** Access methods that are only to be used within Skia code. */
     49     inline GrTexturePriv texturePriv();
     50     inline const GrTexturePriv texturePriv() const;
     51 
     52 protected:
     53     GrTexture(GrGpu*, const GrSurfaceDesc&, GrSLType samplerType,
     54               GrSamplerParams::FilterMode highestFilterMode, bool wasMipMapDataProvided);
     55 
     56 private:
     57     void computeScratchKey(GrScratchKey*) const override;
     58     size_t onGpuMemorySize() const override;
     59     void dirtyMipMaps(bool mipMapsDirty);
     60 
     61     enum MipMapsStatus {
     62         kNotAllocated_MipMapsStatus,
     63         kAllocated_MipMapsStatus,
     64         kValid_MipMapsStatus
     65     };
     66 
     67     GrSLType                      fSamplerType;
     68     GrSamplerParams::FilterMode   fHighestFilterMode;
     69     MipMapsStatus                 fMipMapsStatus;
     70     int                           fMaxMipMapLevel;
     71     SkDestinationSurfaceColorMode fMipColorMode;
     72     friend class GrTexturePriv;
     73 
     74     typedef GrSurface INHERITED;
     75 };
     76 
     77 #endif
     78