gpu/command_buffer/client/gl_in_process_context.cc

   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 #include "gpu/command_buffer/client/gl_in_process_context.h"
   6
   7 #include <set>
   8 #include <utility>
   9 #include <vector>
  10
  11 #include <GLES2/gl2.h>
  12 #ifndef GL_GLEXT_PROTOTYPES
  13 #define GL_GLEXT_PROTOTYPES 1
  14 #endif
  15 #include <GLES2/gl2ext.h>
  16 #include <GLES2/gl2extchromium.h>
  17
  18 #include "base/bind.h"
  19 #include "base/bind_helpers.h"
  20 #include "base/lazy_instance.h"
  21 #include "base/logging.h"
  22 #include "base/memory/scoped_ptr.h"
  23 #include "base/memory/weak_ptr.h"
  24 #include "base/message_loop/message_loop.h"
  25 #include "gpu/command_buffer/client/gles2_implementation.h"
  26 #include "gpu/command_buffer/client/transfer_buffer.h"
  27 #include "gpu/command_buffer/common/command_buffer.h"
  28 #include "gpu/command_buffer/common/constants.h"
  29 #include "ui/gfx/geometry/size.h"
  30 #include "ui/gl/gl_image.h"
  31
  32 #if defined(OS_ANDROID)
  33 #include "ui/gl/android/surface_texture.h"
  34 #endif
  35
  36 namespace gpu {
  37
  38 namespace {
  39
  40 const int32 kDefaultCommandBufferSize = 1024 * 1024;
  41 const unsigned int kDefaultStartTransferBufferSize = 4 * 1024 * 1024;
  42 const unsigned int kDefaultMinTransferBufferSize = 1 * 256 * 1024;
  43 const unsigned int kDefaultMaxTransferBufferSize = 16 * 1024 * 1024;
  44
  45 class GLInProcessContextImpl
  46     : public GLInProcessContext,
  47       public base::SupportsWeakPtr<GLInProcessContextImpl> {
  48  public:
  49   explicit GLInProcessContextImpl(
  50       const GLInProcessContextSharedMemoryLimits& mem_limits);
  51   ~GLInProcessContextImpl() override;
  52
  53   bool Initialize(scoped_refptr<gfx::GLSurface> surface,
  54                   bool is_offscreen,
  55                   bool use_global_share_group,
  56                   GLInProcessContext* share_context,
  57                   gfx::AcceleratedWidget window,
  58                   const gfx::Size& size,
  59                   const gpu::gles2::ContextCreationAttribHelper& attribs,
  60                   gfx::GpuPreference gpu_preference,
  61                   const scoped_refptr<InProcessCommandBuffer::Service>& service,
  62                   GpuMemoryBufferManager* gpu_memory_buffer_manager,
  63                   ImageFactory* image_factory);
  64
  65   // GLInProcessContext implementation:
  66   void SetContextLostCallback(const base::Closure& callback) override;
  67   gles2::GLES2Implementation* GetImplementation() override;
  68   size_t GetMappedMemoryLimit() override;
  69   void SetLock(base::Lock* lock) override;
  70
  71 #if defined(OS_ANDROID)
  72   scoped_refptr<gfx::SurfaceTexture> GetSurfaceTexture(
  73       uint32 stream_id) override;
  74 #endif
  75
  76  private:
  77   void Destroy();
  78   void OnContextLost();
  79   void OnSignalSyncPoint(const base::Closure& callback);
  80
  81   scoped_ptr<gles2::GLES2CmdHelper> gles2_helper_;
  82   scoped_ptr<TransferBuffer> transfer_buffer_;
  83   scoped_ptr<gles2::GLES2Implementation> gles2_implementation_;
  84   scoped_ptr<InProcessCommandBuffer> command_buffer_;
  85
  86   const GLInProcessContextSharedMemoryLimits mem_limits_;
  87   bool context_lost_;
  88   base::Closure context_lost_callback_;
  89   base::Lock* lock_;
  90
  91   DISALLOW_COPY_AND_ASSIGN(GLInProcessContextImpl);
  92 };
  93
  94 base::LazyInstance<base::Lock> g_all_shared_contexts_lock =
  95     LAZY_INSTANCE_INITIALIZER;
  96 base::LazyInstance<std::set<GLInProcessContextImpl*> > g_all_shared_contexts =
  97     LAZY_INSTANCE_INITIALIZER;
  98
  99 GLInProcessContextImpl::GLInProcessContextImpl(
 100     const GLInProcessContextSharedMemoryLimits& mem_limits)
 101     : mem_limits_(mem_limits), context_lost_(false), lock_(nullptr) {
 102 }
 103
 104 GLInProcessContextImpl::~GLInProcessContextImpl() {
 105   {
 106     base::AutoLock lock(g_all_shared_contexts_lock.Get());
 107     g_all_shared_contexts.Get().erase(this);
 108   }
 109   Destroy();
 110 }
 111
 112 gles2::GLES2Implementation* GLInProcessContextImpl::GetImplementation() {
 113   return gles2_implementation_.get();
 114 }
 115
 116 size_t GLInProcessContextImpl::GetMappedMemoryLimit() {
 117   return mem_limits_.mapped_memory_reclaim_limit;
 118 }
 119
 120 void GLInProcessContextImpl::SetLock(base::Lock* lock) {
 121   command_buffer_->SetLock(lock);
 122   lock_ = lock;
 123 }
 124
 125 void GLInProcessContextImpl::SetContextLostCallback(
 126     const base::Closure& callback) {
 127   context_lost_callback_ = callback;
 128 }
 129
 130 void GLInProcessContextImpl::OnContextLost() {
 131   scoped_ptr<base::AutoLock> lock;
 132   if (lock_)
 133     lock.reset(new base::AutoLock(*lock_));
 134   context_lost_ = true;
 135   if (!context_lost_callback_.is_null()) {
 136     context_lost_callback_.Run();
 137   }
 138 }
 139
 140 bool GLInProcessContextImpl::Initialize(
 141     scoped_refptr<gfx::GLSurface> surface,
 142     bool is_offscreen,
 143     bool use_global_share_group,
 144     GLInProcessContext* share_context,
 145     gfx::AcceleratedWidget window,
 146     const gfx::Size& size,
 147     const gles2::ContextCreationAttribHelper& attribs,
 148     gfx::GpuPreference gpu_preference,
 149     const scoped_refptr<InProcessCommandBuffer::Service>& service,
 150     GpuMemoryBufferManager* gpu_memory_buffer_manager,
 151     ImageFactory* image_factory) {
 152   DCHECK(!use_global_share_group || !share_context);
 153   DCHECK(size.width() >= 0 && size.height() >= 0);
 154
 155   std::vector<int32> attrib_vector;
 156   attribs.Serialize(&attrib_vector);
 157
 158   base::Closure wrapped_callback =
 159       base::Bind(&GLInProcessContextImpl::OnContextLost, AsWeakPtr());
 160   command_buffer_.reset(new InProcessCommandBuffer(service));
 161
 162   scoped_ptr<base::AutoLock> scoped_shared_context_lock;
 163   scoped_refptr<gles2::ShareGroup> share_group;
 164   InProcessCommandBuffer* share_command_buffer = NULL;
 165   if (use_global_share_group) {
 166     scoped_shared_context_lock.reset(
 167         new base::AutoLock(g_all_shared_contexts_lock.Get()));
 168     for (std::set<GLInProcessContextImpl*>::const_iterator it =
 169              g_all_shared_contexts.Get().begin();
 170          it != g_all_shared_contexts.Get().end();
 171          it++) {
 172       const GLInProcessContextImpl* context = *it;
 173       if (!context->context_lost_) {
 174         share_group = context->gles2_implementation_->share_group();
 175         share_command_buffer = context->command_buffer_.get();
 176         DCHECK(share_group.get());
 177         DCHECK(share_command_buffer);
 178         break;
 179       }
 180     }
 181   } else if (share_context) {
 182     GLInProcessContextImpl* impl =
 183         static_cast<GLInProcessContextImpl*>(share_context);
 184     share_group = impl->gles2_implementation_->share_group();
 185     share_command_buffer = impl->command_buffer_.get();
 186     DCHECK(share_group.get());
 187     DCHECK(share_command_buffer);
 188   }
 189
 190   if (!command_buffer_->Initialize(surface,
 191                                    is_offscreen,
 192                                    window,
 193                                    size,
 194                                    attrib_vector,
 195                                    gpu_preference,
 196                                    wrapped_callback,
 197                                    share_command_buffer,
 198                                    gpu_memory_buffer_manager,
 199                                    image_factory)) {
 200     LOG(ERROR) << "Failed to initialize InProcessCommmandBuffer";
 201     return false;
 202   }
 203
 204   // Create the GLES2 helper, which writes the command buffer protocol.
 205   gles2_helper_.reset(new gles2::GLES2CmdHelper(command_buffer_.get()));
 206   if (!gles2_helper_->Initialize(mem_limits_.command_buffer_size)) {
 207     LOG(ERROR) << "Failed to initialize GLES2CmdHelper";
 208     Destroy();
 209     return false;
 210   }
 211
 212   // Create a transfer buffer.
 213   transfer_buffer_.reset(new TransferBuffer(gles2_helper_.get()));
 214
 215   // Check for consistency.
 216   DCHECK(!attribs.bind_generates_resource);
 217   const bool bind_generates_resource = false;
 218   const bool support_client_side_arrays = false;
 219
 220   // Create the object exposing the OpenGL API.
 221   gles2_implementation_.reset(
 222       new gles2::GLES2Implementation(gles2_helper_.get(),
 223                                      share_group.get(),
 224                                      transfer_buffer_.get(),
 225                                      bind_generates_resource,
 226                                      attribs.lose_context_when_out_of_memory,
 227                                      support_client_side_arrays,
 228                                      command_buffer_.get()));
 229
 230   if (use_global_share_group) {
 231     g_all_shared_contexts.Get().insert(this);
 232     scoped_shared_context_lock.reset();
 233   }
 234
 235   if (!gles2_implementation_->Initialize(
 236           mem_limits_.start_transfer_buffer_size,
 237           mem_limits_.min_transfer_buffer_size,
 238           mem_limits_.max_transfer_buffer_size,
 239           mem_limits_.mapped_memory_reclaim_limit)) {
 240     return false;
 241   }
 242
 243   return true;
 244 }
 245
 246 void GLInProcessContextImpl::Destroy() {
 247   if (gles2_implementation_) {
 248     // First flush the context to ensure that any pending frees of resources
 249     // are completed. Otherwise, if this context is part of a share group,
 250     // those resources might leak. Also, any remaining side effects of commands
 251     // issued on this context might not be visible to other contexts in the
 252     // share group.
 253     gles2_implementation_->Flush();
 254
 255     gles2_implementation_.reset();
 256   }
 257
 258   transfer_buffer_.reset();
 259   gles2_helper_.reset();
 260   command_buffer_.reset();
 261 }
 262
 263 #if defined(OS_ANDROID)
 264 scoped_refptr<gfx::SurfaceTexture>
 265 GLInProcessContextImpl::GetSurfaceTexture(uint32 stream_id) {
 266   return command_buffer_->GetSurfaceTexture(stream_id);
 267 }
 268 #endif
 269
 270 }  // anonymous namespace
 271
 272 GLInProcessContextSharedMemoryLimits::GLInProcessContextSharedMemoryLimits()
 273     : command_buffer_size(kDefaultCommandBufferSize),
 274       start_transfer_buffer_size(kDefaultStartTransferBufferSize),
 275       min_transfer_buffer_size(kDefaultMinTransferBufferSize),
 276       max_transfer_buffer_size(kDefaultMaxTransferBufferSize),
 277       mapped_memory_reclaim_limit(gles2::GLES2Implementation::kNoLimit) {
 278 }
 279
 280 // static
 281 GLInProcessContext* GLInProcessContext::Create(
 282     scoped_refptr<gpu::InProcessCommandBuffer::Service> service,
 283     scoped_refptr<gfx::GLSurface> surface,
 284     bool is_offscreen,
 285     gfx::AcceleratedWidget window,
 286     const gfx::Size& size,
 287     GLInProcessContext* share_context,
 288     bool use_global_share_group,
 289     const ::gpu::gles2::ContextCreationAttribHelper& attribs,
 290     gfx::GpuPreference gpu_preference,
 291     const GLInProcessContextSharedMemoryLimits& memory_limits,
 292     GpuMemoryBufferManager* gpu_memory_buffer_manager,
 293     ImageFactory* image_factory) {
 294   DCHECK(!use_global_share_group || !share_context);
 295   if (surface.get()) {
 296     DCHECK_EQ(surface->IsOffscreen(), is_offscreen);
 297     DCHECK(surface->GetSize() == size);
 298     DCHECK_EQ(gfx::kNullAcceleratedWidget, window);
 299   }
 300
 301   scoped_ptr<GLInProcessContextImpl> context(
 302       new GLInProcessContextImpl(memory_limits));
 303   if (!context->Initialize(surface,
 304                            is_offscreen,
 305                            use_global_share_group,
 306                            share_context,
 307                            window,
 308                            size,
 309                            attribs,
 310                            gpu_preference,
 311                            service,
 312                            gpu_memory_buffer_manager,
 313                            image_factory))
 314     return NULL;
 315
 316   return context.release();
 317 }
 318
 319 }  // namespace gpu