1 /* 2 * Copyright 2019 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 GrContext_Base_DEFINED 9 #define GrContext_Base_DEFINED 10 11 #include "SkRefCnt.h" 12 #include "GrTypes.h" 13 14 class GrBaseContextPriv; 15 class GrContext; 16 class GrImageContext; 17 class GrRecordingContext; 18 19 class SK_API GrContext_Base : public SkRefCnt { 20 public: 21 virtual ~GrContext_Base(); 22 23 /* 24 * The 3D API backing this context 25 */ 26 GrBackendApi backend() const { return fBackend; } 27 28 // Provides access to functions that aren't part of the public API. 29 GrBaseContextPriv priv(); 30 const GrBaseContextPriv priv() const; 31 32 protected: 33 friend class GrBaseContextPriv; // for hidden functions 34 35 GrContext_Base(GrBackendApi backend, uint32_t uniqueID); 36 37 /** 38 * An identifier for this context. The id is used by all compatible contexts. For example, 39 * if SkImages are created on one thread using an image creation context, then fed into a 40 * DDL Recorder on second thread (which has a recording context) and finally replayed on 41 * a third thread with a direct context, then all three contexts will report the same id. 42 * It is an error for an image to be used with contexts that report different ids. 43 */ 44 uint32_t contextID() const { return fContextID; } 45 46 GrContext_Base* asBaseContext() { return this; } 47 virtual GrImageContext* asImageContext() { return nullptr; } 48 virtual GrRecordingContext* asRecordingContext() { return nullptr; } 49 virtual GrContext* asDirectContext() { return nullptr; } 50 51 private: 52 const GrBackendApi fBackend; 53 const uint32_t fContextID; 54 55 typedef SkRefCnt INHERITED; 56 }; 57 58 #endif 59
