1 /*
2  * Copyright 2018 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 #include "GrContext.h"
9 #include "GrCaps.h"
10 #include "GrContextPriv.h"
11 #include "GrContextThreadSafeProxyPriv.h"
12 #include "GrSkSLFPFactoryCache.h"
13 
14 /**
15  * The DDL Context is the one in effect during DDL Recording. It isn't backed by a GrGPU and
16  * cannot allocate any GPU resources.
17  */
18 class SK_API GrDDLContext : public GrContext {
19 public:
20     GrDDLContext(sk_sp<GrContextThreadSafeProxy> proxy)
21             : INHERITED(proxy->priv().backend(), proxy->priv().contextID()) {
22         fCaps = proxy->priv().refCaps();
23         fFPFactoryCache = proxy->priv().fpFactoryCache();
24         SkASSERT(fFPFactoryCache);
25         fThreadSafeProxy = std::move(proxy);
26     }
27 
28     ~GrDDLContext() override {
29         // The GrDDLContext doesn't actually own the fRestrictedAtlasManager so don't delete it
30     }
31 
32     void abandonContext() override {
33         SkASSERT(0); // abandoning in a DDL Recorder doesn't make a whole lot of sense
34         INHERITED::abandonContext();
35     }
36 
37     void releaseResourcesAndAbandonContext() override {
38         SkASSERT(0); // abandoning in a DDL Recorder doesn't make a whole lot of sense
39         INHERITED::releaseResourcesAndAbandonContext();
40     }
41 
42     void freeGpuResources() override {
43         SkASSERT(0); // freeing resources in a DDL Recorder doesn't make a whole lot of sense
44         INHERITED::freeGpuResources();
45     }
46 
47 protected:
48     bool init(const GrContextOptions& options) override {
49         SkASSERT(fCaps);  // should've been set in ctor
50         SkASSERT(fThreadSafeProxy); // should've been set in the ctor
51 
52         if (!INHERITED::initCommon(options)) {
53             return false;
54         }
55 
56         return true;
57     }
58 
59     GrAtlasManager* onGetAtlasManager() override {
60         SkASSERT(0);   // the DDL Recorders should never invoke this
61         return nullptr;
62     }
63 
64 private:
65     typedef GrContext INHERITED;
66 };
67 
68 sk_sp<GrContext> GrContextPriv::MakeDDL(const sk_sp<GrContextThreadSafeProxy>& proxy) {
69     sk_sp<GrContext> context(new GrDDLContext(proxy));
70 
71     // Note: we aren't creating a Gpu here. This causes the resource provider & cache to
72     // also not be created
73     if (!context->init(proxy->priv().contextOptions())) {
74         return nullptr;
75     }
76     return context;
77 }
78