src/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 "gpu/command_buffer/service/in_process_command_buffer.h"
  30 #include "ui/gfx/size.h"
  31 #include "ui/gl/gl_image.h"
  32
  33 #if defined(OS_ANDROID)
  34 #include "ui/gl/android/surface_texture.h"
  35 #endif
  36
  37 namespace gpu {
  38
  39 namespace {
  40
  41 const int32 kCommandBufferSize = 1024 * 1024;
  42 // TODO(kbr): make the transfer buffer size configurable via context
  43 // creation attributes.
  44 const size_t kStartTransferBufferSize = 4 * 1024 * 1024;
  45 const size_t kMinTransferBufferSize = 1 * 256 * 1024;
  46 const size_t kMaxTransferBufferSize = 16 * 1024 * 1024;
  47
  48 class GLInProcessContextImpl
  49     : public GLInProcessContext,
  50       public base::SupportsWeakPtr<GLInProcessContextImpl> {
  51  public:
  52   explicit GLInProcessContextImpl();
  53   virtual ~GLInProcessContextImpl();
  54
  55   bool Initialize(scoped_refptr<gfx::GLSurface> surface,
  56                   bool is_offscreen,
  57                   bool share_resources,
  58                   gfx::AcceleratedWidget window,
  59                   const gfx::Size& size,
  60                   const GLInProcessContextAttribs& attribs,
  61                   gfx::GpuPreference gpu_preference);
  62
  63   // GLInProcessContext implementation:
  64   virtual void SetContextLostCallback(const base::Closure& callback) OVERRIDE;
  65   virtual gles2::GLES2Implementation* GetImplementation() OVERRIDE;
  66
  67 #if defined(OS_ANDROID)
  68   virtual scoped_refptr<gfx::SurfaceTexture> GetSurfaceTexture(
  69       uint32 stream_id) OVERRIDE;
  70 #endif
  71
  72  private:
  73   void Destroy();
  74   void OnContextLost();
  75   void OnSignalSyncPoint(const base::Closure& callback);
  76
  77   scoped_ptr<gles2::GLES2CmdHelper> gles2_helper_;
  78   scoped_ptr<TransferBuffer> transfer_buffer_;
  79   scoped_ptr<gles2::GLES2Implementation> gles2_implementation_;
  80   scoped_ptr<InProcessCommandBuffer> command_buffer_;
  81
  82   unsigned int share_group_id_;
  83   bool context_lost_;
  84   base::Closure context_lost_callback_;
  85
  86   DISALLOW_COPY_AND_ASSIGN(GLInProcessContextImpl);
  87 };
  88
  89 base::LazyInstance<base::Lock> g_all_shared_contexts_lock =
  90     LAZY_INSTANCE_INITIALIZER;
  91 base::LazyInstance<std::set<GLInProcessContextImpl*> > g_all_shared_contexts =
  92     LAZY_INSTANCE_INITIALIZER;
  93
  94 size_t SharedContextCount() {
  95   base::AutoLock lock(g_all_shared_contexts_lock.Get());
  96   return g_all_shared_contexts.Get().size();
  97 }
  98
  99 GLInProcessContextImpl::GLInProcessContextImpl()
 100     : share_group_id_(0), context_lost_(false) {}
 101
 102 GLInProcessContextImpl::~GLInProcessContextImpl() {
 103   {
 104     base::AutoLock lock(g_all_shared_contexts_lock.Get());
 105     g_all_shared_contexts.Get().erase(this);
 106   }
 107   Destroy();
 108 }
 109
 110 gles2::GLES2Implementation* GLInProcessContextImpl::GetImplementation() {
 111   return gles2_implementation_.get();
 112 }
 113
 114 void GLInProcessContextImpl::SetContextLostCallback(
 115     const base::Closure& callback) {
 116   context_lost_callback_ = callback;
 117 }
 118
 119 void GLInProcessContextImpl::OnContextLost() {
 120   context_lost_ = true;
 121   if (!context_lost_callback_.is_null()) {
 122     context_lost_callback_.Run();
 123   }
 124 }
 125
 126 bool GLInProcessContextImpl::Initialize(
 127     scoped_refptr<gfx::GLSurface> surface,
 128     bool is_offscreen,
 129     bool share_resources,
 130     gfx::AcceleratedWidget window,
 131     const gfx::Size& size,
 132     const GLInProcessContextAttribs& attribs,
 133     gfx::GpuPreference gpu_preference) {
 134   DCHECK(size.width() >= 0 && size.height() >= 0);
 135
 136   const int32 ALPHA_SIZE     = 0x3021;
 137   const int32 BLUE_SIZE      = 0x3022;
 138   const int32 GREEN_SIZE     = 0x3023;
 139   const int32 RED_SIZE       = 0x3024;
 140   const int32 DEPTH_SIZE     = 0x3025;
 141   const int32 STENCIL_SIZE   = 0x3026;
 142   const int32 SAMPLES        = 0x3031;
 143   const int32 SAMPLE_BUFFERS = 0x3032;
 144   const int32 NONE           = 0x3038;
 145
 146   std::vector<int32> attrib_vector;
 147   if (attribs.alpha_size >= 0) {
 148     attrib_vector.push_back(ALPHA_SIZE);
 149     attrib_vector.push_back(attribs.alpha_size);
 150   }
 151   if (attribs.blue_size >= 0) {
 152     attrib_vector.push_back(BLUE_SIZE);
 153     attrib_vector.push_back(attribs.blue_size);
 154   }
 155   if (attribs.green_size >= 0) {
 156     attrib_vector.push_back(GREEN_SIZE);
 157     attrib_vector.push_back(attribs.green_size);
 158   }
 159   if (attribs.red_size >= 0) {
 160     attrib_vector.push_back(RED_SIZE);
 161     attrib_vector.push_back(attribs.red_size);
 162   }
 163   if (attribs.depth_size >= 0) {
 164     attrib_vector.push_back(DEPTH_SIZE);
 165     attrib_vector.push_back(attribs.depth_size);
 166   }
 167   if (attribs.stencil_size >= 0) {
 168     attrib_vector.push_back(STENCIL_SIZE);
 169     attrib_vector.push_back(attribs.stencil_size);
 170   }
 171   if (attribs.samples >= 0) {
 172     attrib_vector.push_back(SAMPLES);
 173     attrib_vector.push_back(attribs.samples);
 174   }
 175   if (attribs.sample_buffers >= 0) {
 176     attrib_vector.push_back(SAMPLE_BUFFERS);
 177     attrib_vector.push_back(attribs.sample_buffers);
 178   }
 179   attrib_vector.push_back(NONE);
 180
 181   base::Closure wrapped_callback =
 182       base::Bind(&GLInProcessContextImpl::OnContextLost, AsWeakPtr());
 183   command_buffer_.reset(new InProcessCommandBuffer());
 184
 185   scoped_ptr<base::AutoLock> scoped_shared_context_lock;
 186   scoped_refptr<gles2::ShareGroup> share_group;
 187   if (share_resources) {
 188     scoped_shared_context_lock.reset(
 189         new base::AutoLock(g_all_shared_contexts_lock.Get()));
 190     for (std::set<GLInProcessContextImpl*>::const_iterator it =
 191              g_all_shared_contexts.Get().begin();
 192          it != g_all_shared_contexts.Get().end();
 193          it++) {
 194       const GLInProcessContextImpl* context = *it;
 195       if (!context->context_lost_) {
 196         share_group = context->gles2_implementation_->share_group();
 197         DCHECK(share_group);
 198         share_group_id_ = context->share_group_id_;
 199         break;
 200       }
 201       share_group_id_ = std::max(share_group_id_, context->share_group_id_);
 202     }
 203     if (!share_group && !++share_group_id_)
 204         ++share_group_id_;
 205   }
 206   if (!command_buffer_->Initialize(surface,
 207                                    is_offscreen,
 208                                    share_resources,
 209                                    window,
 210                                    size,
 211                                    attrib_vector,
 212                                    gpu_preference,
 213                                    wrapped_callback,
 214                                    share_group_id_)) {
 215     LOG(INFO) << "Failed to initialize InProcessCommmandBuffer";
 216     return false;
 217   }
 218
 219   // Create the GLES2 helper, which writes the command buffer protocol.
 220   gles2_helper_.reset(new gles2::GLES2CmdHelper(command_buffer_.get()));
 221   if (!gles2_helper_->Initialize(kCommandBufferSize)) {
 222     LOG(INFO) << "Failed to initialize GLES2CmdHelper";
 223     Destroy();
 224     return false;
 225   }
 226
 227   // Create a transfer buffer.
 228   transfer_buffer_.reset(new TransferBuffer(gles2_helper_.get()));
 229
 230   // Create the object exposing the OpenGL API.
 231   gles2_implementation_.reset(new gles2::GLES2Implementation(
 232       gles2_helper_.get(),
 233       share_group,
 234       transfer_buffer_.get(),
 235       false,
 236       command_buffer_.get()));
 237
 238   if (share_resources) {
 239     g_all_shared_contexts.Get().insert(this);
 240     scoped_shared_context_lock.reset();
 241   }
 242
 243   if (!gles2_implementation_->Initialize(
 244       kStartTransferBufferSize,
 245       kMinTransferBufferSize,
 246       kMaxTransferBufferSize,
 247       gles2::GLES2Implementation::kNoLimit)) {
 248     return false;
 249   }
 250
 251   return true;
 252 }
 253
 254 void GLInProcessContextImpl::Destroy() {
 255   if (gles2_implementation_) {
 256     // First flush the context to ensure that any pending frees of resources
 257     // are completed. Otherwise, if this context is part of a share group,
 258     // those resources might leak. Also, any remaining side effects of commands
 259     // issued on this context might not be visible to other contexts in the
 260     // share group.
 261     gles2_implementation_->Flush();
 262
 263     gles2_implementation_.reset();
 264   }
 265
 266   transfer_buffer_.reset();
 267   gles2_helper_.reset();
 268   command_buffer_.reset();
 269 }
 270
 271 #if defined(OS_ANDROID)
 272 scoped_refptr<gfx::SurfaceTexture>
 273 GLInProcessContextImpl::GetSurfaceTexture(uint32 stream_id) {
 274   return command_buffer_->GetSurfaceTexture(stream_id);
 275 }
 276 #endif
 277
 278 }  // anonymous namespace
 279
 280 GLInProcessContextAttribs::GLInProcessContextAttribs()
 281     : alpha_size(-1),
 282       blue_size(-1),
 283       green_size(-1),
 284       red_size(-1),
 285       depth_size(-1),
 286       stencil_size(-1),
 287       samples(-1),
 288       sample_buffers(-1) {}
 289
 290 // static
 291 GLInProcessContext* GLInProcessContext::CreateContext(
 292     bool is_offscreen,
 293     gfx::AcceleratedWidget window,
 294     const gfx::Size& size,
 295     bool share_resources,
 296     const GLInProcessContextAttribs& attribs,
 297     gfx::GpuPreference gpu_preference) {
 298   scoped_ptr<GLInProcessContextImpl> context(
 299       new GLInProcessContextImpl());
 300   if (!context->Initialize(
 301       NULL /* surface */,
 302       is_offscreen,
 303       share_resources,
 304       window,
 305       size,
 306       attribs,
 307       gpu_preference))
 308     return NULL;
 309
 310   return context.release();
 311 }
 312
 313 // static
 314 GLInProcessContext* GLInProcessContext::CreateWithSurface(
 315     scoped_refptr<gfx::GLSurface> surface,
 316     bool share_resources,
 317     const GLInProcessContextAttribs& attribs,
 318     gfx::GpuPreference gpu_preference) {
 319   scoped_ptr<GLInProcessContextImpl> context(
 320       new GLInProcessContextImpl());
 321   if (!context->Initialize(
 322       surface,
 323       surface->IsOffscreen(),
 324       share_resources,
 325       gfx::kNullAcceleratedWidget,
 326       surface->GetSize(),
 327       attribs,
 328       gpu_preference))
 329     return NULL;
 330
 331   return context.release();
 332 }
 333
 334 }  // namespace gpu