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      1 /*
      2  * Copyright 2017 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 GrMtlTexture_DEFINED
      9 #define GrMtlTexture_DEFINED
     10 
     11 #include "GrTexture.h"
     12 
     13 #import <Metal/Metal.h>
     14 
     15 class GrMtlGpu;
     16 
     17 class GrMtlTexture : public GrTexture {
     18 public:
     19     static sk_sp<GrMtlTexture> CreateNewTexture(GrMtlGpu*, SkBudgeted budgeted,
     20                                                 const GrSurfaceDesc&, int mipLevels);
     21 
     22     static sk_sp<GrMtlTexture> MakeWrappedTexture(GrMtlGpu*, const GrSurfaceDesc&,
     23                                                   GrWrapOwnership);
     24 
     25     ~GrMtlTexture() override;
     26 
     27     id<MTLTexture> mtlTexture() const { return fTexture; }
     28 
     29     GrBackendObject getTextureHandle() const override;
     30     GrBackendTexture getBackendTexture() const override;
     31 
     32     void textureParamsModified() override {}
     33 
     34     bool reallocForMipmap(GrMtlGpu* gpu, uint32_t mipLevels);
     35 
     36     void setRelease(sk_sp<GrReleaseProcHelper> releaseHelper) override {
     37         // Since all MTLResources are inherently ref counted, we can call the Release proc when we
     38         // delete the GrMtlTexture without worry of the MTLTexture getting deleted before it is done
     39         // on the GPU.
     40         fReleaseHelper = std::move(releaseHelper);
     41     }
     42 
     43 protected:
     44     GrMtlTexture(GrMtlGpu*, const GrSurfaceDesc&);
     45 
     46     GrMtlGpu* getMtlGpu() const;
     47 
     48     void onAbandon() override {
     49         fTexture = nil;
     50     }
     51     void onRelease() override {
     52         fTexture = nil;
     53     }
     54 
     55      bool onStealBackendTexture(GrBackendTexture*, SkImage::BackendTextureReleaseProc*) override {
     56          return false;
     57      }
     58 
     59 private:
     60     enum Wrapped { kWrapped };
     61     GrMtlTexture(GrMtlGpu*, SkBudgeted, const GrSurfaceDesc&, id<MTLTexture>, GrMipMapsStatus);
     62    // GrMtlTexture(GrMtlGpu*, Wrapped, const GrSurfaceDesc&, GrMtlImage::Wrapped wrapped);
     63 
     64     id<MTLTexture> fTexture;
     65 
     66     sk_sp<GrReleaseProcHelper>        fReleaseHelper;
     67 
     68     typedef GrTexture INHERITED;
     69 };
     70 
     71 #endif
     72