android_webview/browser/deferred_gpu_command_service.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef ANDROID_WEBVIEW_BROWSER_DEFERRED_GPU_COMMAND_SERVICE_H_
   6 #define ANDROID_WEBVIEW_BROWSER_DEFERRED_GPU_COMMAND_SERVICE_H_
   7
   8 #include <queue>
   9 #include <utility>
  10
  11 #include "base/lazy_instance.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "base/threading/thread_local.h"
  14 #include "base/time/time.h"
  15 #include "gpu/command_buffer/service/in_process_command_buffer.h"
  16
  17 namespace android_webview {
  18
  19 class ScopedAllowGL {
  20  public:
  21   ScopedAllowGL();
  22   ~ScopedAllowGL();
  23
  24   static bool IsAllowed();
  25
  26  private:
  27   static base::LazyInstance<base::ThreadLocalBoolean> allow_gl;
  28
  29   DISALLOW_COPY_AND_ASSIGN(ScopedAllowGL);
  30 };
  31
  32 class DeferredGpuCommandService
  33     : public gpu::InProcessCommandBuffer::Service,
  34       public base::RefCountedThreadSafe<DeferredGpuCommandService> {
  35  public:
  36   static void SetInstance();
  37   static DeferredGpuCommandService* GetInstance();
  38
  39   void ScheduleTask(const base::Closure& task) override;
  40   void ScheduleIdleWork(const base::Closure& task) override;
  41   bool UseVirtualizedGLContexts() override;
  42   scoped_refptr<gpu::gles2::ShaderTranslatorCache> shader_translator_cache()
  43       override;
  44
  45   void RunTasks();
  46   // If |is_idle| is false, this will only run older idle tasks.
  47   void PerformIdleWork(bool is_idle);
  48   // Flush the idle queue until it is empty. This is different from
  49   // PerformIdleWork(is_idle = true), which does not run any newly scheduled
  50   // idle tasks during the idle run.
  51   void PerformAllIdleWork();
  52
  53   void AddRef() const override;
  54   void Release() const override;
  55
  56  protected:
  57   ~DeferredGpuCommandService() override;
  58   friend class base::RefCountedThreadSafe<DeferredGpuCommandService>;
  59
  60  private:
  61   friend class ScopedAllowGL;
  62   static void RequestProcessGL();
  63
  64   DeferredGpuCommandService();
  65   size_t IdleQueueSize();
  66
  67   base::Lock tasks_lock_;
  68   std::queue<base::Closure> tasks_;
  69   std::queue<std::pair<base::Time, base::Closure> > idle_tasks_;
  70
  71   scoped_refptr<gpu::gles2::ShaderTranslatorCache> shader_translator_cache_;
  72   DISALLOW_COPY_AND_ASSIGN(DeferredGpuCommandService);
  73 };
  74
  75 }  // namespace android_webview
  76
  77 #endif  // ANDROID_WEBVIEW_BROWSER_DEFERRED_GPU_COMMAND_SERVICE_H_