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 GLInProcessContextImpl::GLInProcessContextImpl()
  95     : share_group_id_(0), context_lost_(false) {}
  96
  97 GLInProcessContextImpl::~GLInProcessContextImpl() {
  98   {
  99     base::AutoLock lock(g_all_shared_contexts_lock.Get());
 100     g_all_shared_contexts.Get().erase(this);
 101   }
 102   Destroy();
 103 }
 104
 105 gles2::GLES2Implementation* GLInProcessContextImpl::GetImplementation() {
 106   return gles2_implementation_.get();
 107 }
 108
 109 void GLInProcessContextImpl::SetContextLostCallback(
 110     const base::Closure& callback) {
 111   context_lost_callback_ = callback;
 112 }
 113
 114 void GLInProcessContextImpl::OnContextLost() {
 115   context_lost_ = true;
 116   if (!context_lost_callback_.is_null()) {
 117     context_lost_callback_.Run();
 118   }
 119 }
 120
 121 bool GLInProcessContextImpl::Initialize(
 122     scoped_refptr<gfx::GLSurface> surface,
 123     bool is_offscreen,
 124     bool share_resources,
 125     gfx::AcceleratedWidget window,
 126     const gfx::Size& size,
 127     const GLInProcessContextAttribs& attribs,
 128     gfx::GpuPreference gpu_preference) {
 129   DCHECK(size.width() >= 0 && size.height() >= 0);
 130
 131   // Changes to these values should also be copied to
 132   // gpu/command_buffer/client/gl_in_process_context.cc and to
 133   // content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h
 134   const int32 ALPHA_SIZE     = 0x3021;
 135   const int32 BLUE_SIZE      = 0x3022;
 136   const int32 GREEN_SIZE     = 0x3023;
 137   const int32 RED_SIZE       = 0x3024;
 138   const int32 DEPTH_SIZE     = 0x3025;
 139   const int32 STENCIL_SIZE   = 0x3026;
 140   const int32 SAMPLES        = 0x3031;
 141   const int32 SAMPLE_BUFFERS = 0x3032;
 142   const int32 NONE           = 0x3038;
 143
 144   // Chromium-specific attributes
 145   const int32 FAIL_IF_MAJOR_PERF_CAVEAT = 0x10002;
 146
 147   std::vector<int32> attrib_vector;
 148   if (attribs.alpha_size >= 0) {
 149     attrib_vector.push_back(ALPHA_SIZE);
 150     attrib_vector.push_back(attribs.alpha_size);
 151   }
 152   if (attribs.blue_size >= 0) {
 153     attrib_vector.push_back(BLUE_SIZE);
 154     attrib_vector.push_back(attribs.blue_size);
 155   }
 156   if (attribs.green_size >= 0) {
 157     attrib_vector.push_back(GREEN_SIZE);
 158     attrib_vector.push_back(attribs.green_size);
 159   }
 160   if (attribs.red_size >= 0) {
 161     attrib_vector.push_back(RED_SIZE);
 162     attrib_vector.push_back(attribs.red_size);
 163   }
 164   if (attribs.depth_size >= 0) {
 165     attrib_vector.push_back(DEPTH_SIZE);
 166     attrib_vector.push_back(attribs.depth_size);
 167   }
 168   if (attribs.stencil_size >= 0) {
 169     attrib_vector.push_back(STENCIL_SIZE);
 170     attrib_vector.push_back(attribs.stencil_size);
 171   }
 172   if (attribs.samples >= 0) {
 173     attrib_vector.push_back(SAMPLES);
 174     attrib_vector.push_back(attribs.samples);
 175   }
 176   if (attribs.sample_buffers >= 0) {
 177     attrib_vector.push_back(SAMPLE_BUFFERS);
 178     attrib_vector.push_back(attribs.sample_buffers);
 179   }
 180   if (attribs.fail_if_major_perf_caveat > 0) {
 181     attrib_vector.push_back(FAIL_IF_MAJOR_PERF_CAVEAT);
 182     attrib_vector.push_back(attribs.fail_if_major_perf_caveat);
 183   }
 184   attrib_vector.push_back(NONE);
 185
 186   base::Closure wrapped_callback =
 187       base::Bind(&GLInProcessContextImpl::OnContextLost, AsWeakPtr());
 188   command_buffer_.reset(new InProcessCommandBuffer());
 189
 190   scoped_ptr<base::AutoLock> scoped_shared_context_lock;
 191   scoped_refptr<gles2::ShareGroup> share_group;
 192   if (share_resources) {
 193     scoped_shared_context_lock.reset(
 194         new base::AutoLock(g_all_shared_contexts_lock.Get()));
 195     for (std::set<GLInProcessContextImpl*>::const_iterator it =
 196              g_all_shared_contexts.Get().begin();
 197          it != g_all_shared_contexts.Get().end();
 198          it++) {
 199       const GLInProcessContextImpl* context = *it;
 200       if (!context->context_lost_) {
 201         share_group = context->gles2_implementation_->share_group();
 202         DCHECK(share_group);
 203         share_group_id_ = context->share_group_id_;
 204         break;
 205       }
 206       share_group_id_ = std::max(share_group_id_, context->share_group_id_);
 207     }
 208     if (!share_group && !++share_group_id_)
 209         ++share_group_id_;
 210   }
 211   if (!command_buffer_->Initialize(surface,
 212                                    is_offscreen,
 213                                    share_resources,
 214                                    window,
 215                                    size,
 216                                    attrib_vector,
 217                                    gpu_preference,
 218                                    wrapped_callback,
 219                                    share_group_id_)) {
 220     LOG(ERROR) << "Failed to initialize InProcessCommmandBuffer";
 221     return false;
 222   }
 223
 224   // Create the GLES2 helper, which writes the command buffer protocol.
 225   gles2_helper_.reset(new gles2::GLES2CmdHelper(command_buffer_.get()));
 226   if (!gles2_helper_->Initialize(kCommandBufferSize)) {
 227     LOG(ERROR) << "Failed to initialize GLES2CmdHelper";
 228     Destroy();
 229     return false;
 230   }
 231
 232   // Create a transfer buffer.
 233   transfer_buffer_.reset(new TransferBuffer(gles2_helper_.get()));
 234
 235   bool bind_generates_resources = false;
 236   bool free_everything_when_invisible = false;
 237
 238   // Create the object exposing the OpenGL API.
 239   gles2_implementation_.reset(new gles2::GLES2Implementation(
 240       gles2_helper_.get(),
 241       share_group,
 242       transfer_buffer_.get(),
 243       bind_generates_resources,
 244       free_everything_when_invisible,
 245       command_buffer_.get()));
 246
 247   if (share_resources) {
 248     g_all_shared_contexts.Get().insert(this);
 249     scoped_shared_context_lock.reset();
 250   }
 251
 252   if (!gles2_implementation_->Initialize(
 253       kStartTransferBufferSize,
 254       kMinTransferBufferSize,
 255       kMaxTransferBufferSize,
 256       gles2::GLES2Implementation::kNoLimit)) {
 257     return false;
 258   }
 259
 260   return true;
 261 }
 262
 263 void GLInProcessContextImpl::Destroy() {
 264   if (gles2_implementation_) {
 265     // First flush the context to ensure that any pending frees of resources
 266     // are completed. Otherwise, if this context is part of a share group,
 267     // those resources might leak. Also, any remaining side effects of commands
 268     // issued on this context might not be visible to other contexts in the
 269     // share group.
 270     gles2_implementation_->Flush();
 271
 272     gles2_implementation_.reset();
 273   }
 274
 275   transfer_buffer_.reset();
 276   gles2_helper_.reset();
 277   command_buffer_.reset();
 278 }
 279
 280 #if defined(OS_ANDROID)
 281 scoped_refptr<gfx::SurfaceTexture>
 282 GLInProcessContextImpl::GetSurfaceTexture(uint32 stream_id) {
 283   return command_buffer_->GetSurfaceTexture(stream_id);
 284 }
 285 #endif
 286
 287 }  // anonymous namespace
 288
 289 GLInProcessContextAttribs::GLInProcessContextAttribs()
 290     : alpha_size(-1),
 291       blue_size(-1),
 292       green_size(-1),
 293       red_size(-1),
 294       depth_size(-1),
 295       stencil_size(-1),
 296       samples(-1),
 297       sample_buffers(-1) {}
 298
 299 // static
 300 GLInProcessContext* GLInProcessContext::CreateContext(
 301     bool is_offscreen,
 302     gfx::AcceleratedWidget window,
 303     const gfx::Size& size,
 304     bool share_resources,
 305     const GLInProcessContextAttribs& attribs,
 306     gfx::GpuPreference gpu_preference) {
 307   scoped_ptr<GLInProcessContextImpl> context(
 308       new GLInProcessContextImpl());
 309   if (!context->Initialize(
 310       NULL /* surface */,
 311       is_offscreen,
 312       share_resources,
 313       window,
 314       size,
 315       attribs,
 316       gpu_preference))
 317     return NULL;
 318
 319   return context.release();
 320 }
 321
 322 // static
 323 GLInProcessContext* GLInProcessContext::CreateWithSurface(
 324     scoped_refptr<gfx::GLSurface> surface,
 325     bool share_resources,
 326     const GLInProcessContextAttribs& attribs,
 327     gfx::GpuPreference gpu_preference) {
 328   scoped_ptr<GLInProcessContextImpl> context(
 329       new GLInProcessContextImpl());
 330   if (!context->Initialize(
 331       surface,
 332       surface->IsOffscreen(),
 333       share_resources,
 334       gfx::kNullAcceleratedWidget,
 335       surface->GetSize(),
 336       attribs,
 337       gpu_preference))
 338     return NULL;
 339
 340   return context.release();
 341 }
 342
 343 }  // namespace gpu