| // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COMPONENTS_VIZ_COMMON_GPU_CONTEXT_PROVIDER_H_ |
| #define COMPONENTS_VIZ_COMMON_GPU_CONTEXT_PROVIDER_H_ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| #include "base/callback.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/synchronization/lock.h" |
| #include "components/viz/common/gpu/context_cache_controller.h" |
| #include "components/viz/common/gpu/context_lost_observer.h" |
| #include "components/viz/common/viz_common_export.h" |
| #include "gpu/command_buffer/common/capabilities.h" |
| #include "gpu/command_buffer/common/context_result.h" |
| |
| class GrContext; |
| |
| namespace base { |
| class Lock; |
| } |
| |
| namespace gpu { |
| class ContextSupport; |
| struct GpuFeatureInfo; |
| |
| namespace gles2 { |
| class GLES2Interface; |
| } |
| |
| } // namespace gpu |
| |
| namespace viz { |
| |
| class VIZ_COMMON_EXPORT ContextProvider { |
| public: |
| class VIZ_COMMON_EXPORT ScopedContextLock { |
| public: |
| explicit ScopedContextLock(ContextProvider* context_provider); |
| ~ScopedContextLock(); |
| |
| gpu::gles2::GLES2Interface* ContextGL() { |
| return context_provider_->ContextGL(); |
| } |
| |
| private: |
| ContextProvider* const context_provider_; |
| base::AutoLock context_lock_; |
| std::unique_ptr<ContextCacheController::ScopedBusy> busy_; |
| }; |
| |
| // RefCounted interface. |
| virtual void AddRef() const = 0; |
| virtual void Release() const = 0; |
| |
| // Bind the 3d context to the current thread. This should be called before |
| // accessing the contexts. Calling it more than once should have no effect. |
| // Once this function has been called, the class should only be accessed |
| // from the same thread unless the function has some explicitly specified |
| // rules for access on a different thread. See SetupLockOnMainThread(), which |
| // can be used to provide access from multiple threads. |
| virtual gpu::ContextResult BindToCurrentThread() = 0; |
| |
| // Adds/removes an observer to be called when the context is lost. AddObserver |
| // should be called before BindToCurrentThread from the same thread that the |
| // context is bound to, or any time while the lock is acquired after checking |
| // for context loss. |
| // NOTE: Implementations must avoid post-tasking the to the observer directly |
| // as the observer may remove itself before the task runs. |
| virtual void AddObserver(ContextLostObserver* obs) = 0; |
| virtual void RemoveObserver(ContextLostObserver* obs) = 0; |
| |
| // Returns the lock that should be held if using this context from multiple |
| // threads. This can be called on any thread. |
| // NOTE: Helper method for ScopedContextLock. Use that instead of calling this |
| // directly. |
| virtual base::Lock* GetLock() = 0; |
| |
| // Get a CacheController interface to the 3d context. The context provider |
| // must have been successfully bound to a thread before calling this. |
| virtual ContextCacheController* CacheController() = 0; |
| |
| // Get a ContextSupport interface to the 3d context. The context provider |
| // must have been successfully bound to a thread before calling this. |
| virtual gpu::ContextSupport* ContextSupport() = 0; |
| |
| // Get a Skia GPU raster interface to the 3d context. The context provider |
| // must have been successfully bound to a thread before calling this. Returns |
| // nullptr if a GrContext fails to initialize on this context. |
| virtual class GrContext* GrContext() = 0; |
| |
| // Returns the capabilities of the currently bound 3d context. The context |
| // provider must have been successfully bound to a thread before calling this. |
| virtual const gpu::Capabilities& ContextCapabilities() const = 0; |
| |
| // Returns feature blacklist decisions and driver bug workarounds info. The |
| // context provider must have been successfully bound to a thread before |
| // calling this. |
| virtual const gpu::GpuFeatureInfo& GetGpuFeatureInfo() const = 0; |
| |
| // Get a GLES2 interface to the 3d context. The context provider must have |
| // been successfully bound to a thread before calling this. |
| virtual gpu::gles2::GLES2Interface* ContextGL() = 0; |
| |
| protected: |
| virtual ~ContextProvider() = default; |
| }; |
| |
| } // namespace viz |
| |
| #endif // COMPONENTS_VIZ_COMMON_GPU_CONTEXT_PROVIDER_H_ |