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      1 // Copyright (c) 2012 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 // This file contains the GPUTrace class.
      6 #ifndef GPU_COMMAND_BUFFER_SERVICE_GPU_TRACER_H_
      7 #define GPU_COMMAND_BUFFER_SERVICE_GPU_TRACER_H_
      8 
      9 #include <string>
     10 
     11 #include "base/basictypes.h"
     12 #include "base/memory/scoped_ptr.h"
     13 #include "base/memory/weak_ptr.h"
     14 #include "base/threading/thread.h"
     15 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
     16 #include "gpu/gpu_export.h"
     17 #include "ui/gl/gl_bindings.h"
     18 
     19 namespace gpu {
     20 namespace gles2 {
     21 
     22 // Id used to keep trace namespaces separate
     23 enum GpuTracerSource {
     24   kTraceGroupMarker = 0,
     25   kTraceCHROMIUM = 1,
     26   kTraceDecoder = 2,
     27 };
     28 
     29 // Traces GPU Commands.
     30 class GPUTracer {
     31  public:
     32   static scoped_ptr<GPUTracer> Create(gles2::GLES2Decoder* decoder);
     33 
     34   GPUTracer();
     35   virtual ~GPUTracer();
     36 
     37   // Scheduled processing in decoder begins.
     38   virtual bool BeginDecoding() = 0;
     39 
     40   // Scheduled processing in decoder ends.
     41   virtual bool EndDecoding() = 0;
     42 
     43   // Begin a trace marker.
     44   virtual bool Begin(const std::string& name, GpuTracerSource source) = 0;
     45 
     46   // End the last started trace marker.
     47   virtual bool End(GpuTracerSource source) = 0;
     48 
     49   virtual bool IsTracing() = 0;
     50 
     51   // Retrieve the name of the current open trace.
     52   // Returns empty string if no current open trace.
     53   virtual const std::string& CurrentName() const = 0;
     54 
     55  private:
     56   DISALLOW_COPY_AND_ASSIGN(GPUTracer);
     57 };
     58 
     59 class Outputter : public base::RefCounted<Outputter> {
     60  public:
     61   virtual void Trace(const std::string& name,
     62                      int64 start_time,
     63                      int64 end_time) = 0;
     64 
     65  protected:
     66   virtual ~Outputter() {}
     67   friend class base::RefCounted<Outputter>;
     68 };
     69 
     70 class TraceOutputter : public Outputter {
     71  public:
     72   static scoped_refptr<TraceOutputter> Create(const std::string& name);
     73   virtual void Trace(const std::string& name,
     74                      int64 start_time,
     75                      int64 end_time) OVERRIDE;
     76 
     77  protected:
     78   friend class base::RefCounted<Outputter>;
     79   explicit TraceOutputter(const std::string& name);
     80   virtual ~TraceOutputter();
     81 
     82   base::Thread named_thread_;
     83   uint64 local_trace_id_;
     84 
     85   DISALLOW_COPY_AND_ASSIGN(TraceOutputter);
     86 };
     87 
     88 class GPU_EXPORT Trace : public base::RefCounted<Trace> {
     89  public:
     90   explicit Trace(const std::string& name) : name_(name) {}
     91 
     92   virtual void Start() = 0;
     93   virtual void End() = 0;
     94 
     95   // True if the the results of this query are available.
     96   virtual bool IsAvailable() = 0;
     97 
     98   virtual bool IsProcessable();
     99   virtual void Process() = 0;
    100 
    101   virtual const std::string& name();
    102 
    103  protected:
    104   virtual ~Trace() {}
    105 
    106  private:
    107   friend class base::RefCounted<Trace>;
    108 
    109   std::string name_;
    110 
    111   DISALLOW_COPY_AND_ASSIGN(Trace);
    112 };
    113 
    114 class GPU_EXPORT GLARBTimerTrace : public Trace {
    115  public:
    116   GLARBTimerTrace(scoped_refptr<Outputter> outputter,
    117                   const std::string& name,
    118                   int64 offset);
    119 
    120   // Implementation of Tracer
    121   virtual void Start() OVERRIDE;
    122   virtual void End() OVERRIDE;
    123   virtual bool IsAvailable() OVERRIDE;
    124   virtual void Process() OVERRIDE;
    125 
    126  private:
    127   virtual ~GLARBTimerTrace();
    128 
    129   void Output();
    130 
    131   scoped_refptr<Outputter> outputter_;
    132 
    133   int64 offset_;
    134   int64 start_time_;
    135   int64 end_time_;
    136   bool end_requested_;
    137 
    138   GLuint queries_[2];
    139 
    140   DISALLOW_COPY_AND_ASSIGN(GLARBTimerTrace);
    141 };
    142 
    143 }  // namespace gles2
    144 }  // namespace gpu
    145 
    146 #endif  // GPU_COMMAND_BUFFER_SERVICE_GPU_TRACER_H_
    147