ContextPriv.h

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/*
 * Copyright 2021 Google LLC
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#ifndef skgpu_graphite_ContextPriv_DEFINED
#define skgpu_graphite_ContextPriv_DEFINED
 
#include "include/gpu/graphite/Context.h"
#include "src/gpu/graphite/QueueManager.h"
#include "src/gpu/graphite/SharedContext.h"
 
#if defined(GRAPHITE_TEST_UTILS)
#include "include/private/gpu/graphite/ContextOptionsPriv.h"
#endif
 
namespace skgpu::graphite {
 
class Caps;
class GlobalCache;
class RendererProvider;
class ResourceProvider;
class ShaderCodeDictionary;
 
/** Class that adds methods to Context that are only intended for use internal to Skia.
    This class is purely a privileged window into Context. It should never have additional
    data members or virtual methods. */
class ContextPriv {
public:
    const Caps* caps() const { return fContext->fSharedContext->caps(); }
 
    const ShaderCodeDictionary* shaderCodeDictionary() const {
        return fContext->fSharedContext->shaderCodeDictionary();
    }
    ShaderCodeDictionary* shaderCodeDictionary() {
        return fContext->fSharedContext->shaderCodeDictionary();
    }
    const GlobalCache* globalCache() const {
        return fContext->fSharedContext->globalCache();
    }
    GlobalCache* globalCache() {
        return fContext->fSharedContext->globalCache();
    }
    const RendererProvider* rendererProvider() const {
        return fContext->fSharedContext->rendererProvider();
    }
    ResourceProvider* resourceProvider() const {
        return fContext->fResourceProvider.get();
    }
 
#if defined(GRAPHITE_TEST_UTILS)
    void startCapture() {
        fContext->fQueueManager->startCapture();
    }
    void stopCapture() {
        fContext->fQueueManager->stopCapture();
    }
 
    void deregisterRecorder(const Recorder*);
 
    bool readPixels(const SkPixmap&,
                    const TextureProxy*,
                    const SkImageInfo& srcImageInfo,
                    int srcX, int srcY);
 
    bool supportsPathRendererStrategy(PathRendererStrategy);
#endif
 
private:
    friend class Context; // to construct/copy this type.
 
    explicit ContextPriv(Context* context) : fContext(context) {}
 
    ContextPriv& operator=(const ContextPriv&) = delete;
 
    // No taking addresses of this type.
    const ContextPriv* operator&() const;
    ContextPriv *operator&();
 
    Context* fContext;
};
 
inline ContextPriv Context::priv() { return ContextPriv(this); }
 
// NOLINTNEXTLINE(readability-const-return-type)
inline const ContextPriv Context::priv() const {
    return ContextPriv(const_cast<Context *>(this));
}
 
// This class is friended by the Context and allows the backend ContextFactory functions to
// trampoline through this to call the private Context ctor. We can't directly friend the factory
// functions in Context because they are in a different namespace and we don't want to declare the
// functions in Context.h
class ContextCtorAccessor {
public:
    static std::unique_ptr<Context> MakeContext(sk_sp<SharedContext>,
                                                std::unique_ptr<QueueManager>,
                                                const ContextOptions&);
};
 
} // namespace skgpu::graphite
 
#endif // skgpu_graphite_ContextPriv_DEFINED