Revert of command_buffer_gles2: Implement EGL default Display as a global object

gpu/gles2_conform_support/egl/context.cc

Index: gpu/gles2_conform_support/egl/context.cc
diff --git a/gpu/gles2_conform_support/egl/context.cc b/gpu/gles2_conform_support/egl/context.cc
deleted file mode 100644
index e38d899dddf6e71691099a13bdeb199ae4f9663e..0000000000000000000000000000000000000000
--- a/gpu/gles2_conform_support/egl/context.cc
+++ /dev/null
@@ -1,394 +0,0 @@
-// Copyright (c) 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "gpu/gles2_conform_support/egl/context.h"
-
-#include "base/bind.h"
-#include "base/bind_helpers.h"
-#include "gpu/command_buffer/client/gles2_implementation.h"
-#include "gpu/command_buffer/client/gles2_lib.h"
-#include "gpu/command_buffer/client/transfer_buffer.h"
-#include "gpu/command_buffer/common/value_state.h"
-#include "gpu/command_buffer/service/context_group.h"
-#include "gpu/command_buffer/service/mailbox_manager.h"
-#include "gpu/command_buffer/service/memory_tracking.h"
-#include "gpu/command_buffer/service/transfer_buffer_manager.h"
-#include "gpu/command_buffer/service/valuebuffer_manager.h"
-#include "gpu/gles2_conform_support/egl/config.h"
-#include "gpu/gles2_conform_support/egl/display.h"
-#include "gpu/gles2_conform_support/egl/surface.h"
-#include "gpu/gles2_conform_support/egl/thread_state.h"
-
-// The slight complexification in this file comes from following properties:
-// 1) Command buffer connection (context) can not be established without a
-// GLSurface. EGL Context can be created independent of a surface.  This is why
-// the connection is created only during first MakeCurrent.
-// 2) Command buffer MakeCurrent calls need the real gl context and surface be
-// current.
-// 3) Client can change real EGL context behind the scenes and then still expect
-// command buffer MakeCurrent re-set the command buffer context. This is why all
-// MakeCurrent calls must actually reset the real context, even though command
-// buffer current context does not change.
-// 4) EGL context can be destroyed without surface, but command buffer would
-// need the surface to run various cleanups. If context is destroyed
-// surfaceless, the context is marked lost before destruction. This is avoided
-// if possible, since command buffer at the time of writing prints out debug
-// text in this case.
-
-namespace {
-const int32_t kCommandBufferSize = 1024 * 1024;
-const int32_t kTransferBufferSize = 512 * 1024;
-const bool kBindGeneratesResources = true;
-const bool kLoseContextWhenOutOfMemory = false;
-const bool kSupportClientSideArrays = true;
-}
-
-namespace egl {
-Context::Context(Display* display, const Config* config)
-    : display_(display),
-      config_(config),
-      is_current_in_some_thread_(false),
-      is_destroyed_(false) {}
-
-Context::~Context() {
-  // We might not have a surface, so we must lose the context.  Cleanup will
-  // execute GL commands otherwise. TODO: if shared contexts are ever
-  // implemented, this will leak the GL resources. For pbuffer contexts, one
-  // could track the last current surface or create a surface for destroying
-  // purposes only. Other option would be to make the service usable without
-  // surface.
-  if (HasService()) {
-    if (!WasServiceContextLost())
-      MarkServiceContextLost();
-    DestroyService();
-  }
-}
-
-void Context::MarkDestroyed() {
-  is_destroyed_ = true;
-}
-
-void Context::FlushAndSwapBuffers(gfx::GLSurface* current_surface) {
-  DCHECK(HasService() && is_current_in_some_thread_);
-  if (!Flush(current_surface))
-    return;
-  current_surface->SwapBuffers();
-}
-
-bool Context::MakeCurrent(Context* current_context,
-                          gfx::GLSurface* current_surface,
-                          Context* new_context,
-                          gfx::GLSurface* new_surface) {
-  if (!new_context && !current_context) {
-    return true;
-  }
-
-  bool cleanup_old_current_context = false;
-  if (current_context) {
-    if (current_context->Flush(current_surface))
-      cleanup_old_current_context = new_context != current_context;
-  }
-
-  if (new_context) {
-    if (!new_context->IsCompatibleSurface(new_surface))
-      return false;
-
-    if (new_context->HasService()) {
-      if (new_context->WasServiceContextLost())
-        return false;
-      if (new_context != current_context) {
-        // If Flush did not set the current context, set it now. Otherwise
-        // calling into the decoder is not ok.
-        if (!new_context->gl_context_->MakeCurrent(new_surface)) {
-          new_context->MarkServiceContextLost();
-          return false;
-        }
-      }
-      if (new_context != current_context || new_surface != current_surface)
-        new_context->decoder_->SetSurface(new_surface);
-      if (!new_context->decoder_->MakeCurrent()) {
-        new_context->MarkServiceContextLost();
-        return false;
-      }
-    } else {
-      if (!new_context->CreateService(new_surface)) {
-        return false;
-      }
-    }
-  }
-
-  // The current_surface will be released when MakeCurrent succeeds.
-  // Cleanup in this case only.
-  if (cleanup_old_current_context) {
-    if (current_context->is_destroyed_ && current_surface != new_surface) {
-      current_context->gl_context_->MakeCurrent(current_surface);
-      // If we are releasing the context and we have one ref, it means that the
-      // ref will be lost and the object will be destroyed.  Destroy the service
-      // explicitly here, so that cleanup can happen and client GL
-      // implementation does not print errors.
-      current_context->DestroyService();
-    } else {
-      current_context->decoder_->ReleaseSurface();
-    }
-  }
-
-  return true;
-}
-
-bool Context::ValidateAttributeList(const EGLint* attrib_list) {
-  if (attrib_list) {
-    for (int i = 0; attrib_list[i] != EGL_NONE; attrib_list += 2) {
-      switch (attrib_list[i]) {
-        case EGL_CONTEXT_CLIENT_VERSION:
-          break;
-        default:
-          return false;
-      }
-    }
-  }
-  return true;
-}
-
-gpu::Capabilities Context::GetCapabilities() {
-  return decoder_->GetCapabilities();
-}
-
-int32_t Context::CreateImage(ClientBuffer buffer,
-                             size_t width,
-                             size_t height,
-                             unsigned internalformat) {
-  NOTIMPLEMENTED();
-  return -1;
-}
-
-void Context::DestroyImage(int32_t id) {
-  NOTIMPLEMENTED();
-}
-
-int32_t Context::CreateGpuMemoryBufferImage(size_t width,
-                                            size_t height,
-                                            unsigned internalformat,
-                                            unsigned usage) {
-  NOTIMPLEMENTED();
-  return -1;
-}
-
-void Context::SignalQuery(uint32_t query, const base::Closure& callback) {
-  NOTIMPLEMENTED();
-}
-
-void Context::SetLock(base::Lock*) {
-  NOTIMPLEMENTED();
-}
-
-bool Context::IsGpuChannelLost() {
-  NOTIMPLEMENTED();
-  return false;
-}
-
-void Context::EnsureWorkVisible() {
-  // This is only relevant for out-of-process command buffers.
-}
-
-gpu::CommandBufferNamespace Context::GetNamespaceID() const {
-  return gpu::CommandBufferNamespace::IN_PROCESS;
-}
-
-gpu::CommandBufferId Context::GetCommandBufferID() const {
-  return gpu::CommandBufferId();
-}
-
-int32_t Context::GetExtraCommandBufferData() const {
-  return 0;
-}
-
-uint64_t Context::GenerateFenceSyncRelease() {
-  return display_->GenerateFenceSyncRelease();
-}
-
-bool Context::IsFenceSyncRelease(uint64_t release) {
-  return display_->IsFenceSyncRelease(release);
-}
-
-bool Context::IsFenceSyncFlushed(uint64_t release) {
-  return display_->IsFenceSyncFlushed(release);
-}
-
-bool Context::IsFenceSyncFlushReceived(uint64_t release) {
-  return display_->IsFenceSyncFlushReceived(release);
-}
-
-void Context::SignalSyncToken(const gpu::SyncToken& sync_token,
-                              const base::Closure& callback) {
-  NOTIMPLEMENTED();
-}
-
-bool Context::CanWaitUnverifiedSyncToken(const gpu::SyncToken* sync_token) {
-  return false;
-}
-
-void Context::ApplyCurrentContext(gfx::GLSurface* current_surface) {
-  DCHECK(HasService());
-  // The current_surface will be the same as
-  // the surface of the decoder. We can not DCHECK as there is
-  // no accessor.
-  if (!WasServiceContextLost()) {
-    if (!gl_context_->MakeCurrent(current_surface))
-      MarkServiceContextLost();
-  }
-  gles2::SetGLContext(client_gl_context_.get());
-}
-
-void Context::ApplyContextReleased() {
-  gles2::SetGLContext(nullptr);
-}
-
-bool Context::CreateService(gfx::GLSurface* gl_surface) {
-  scoped_refptr<gpu::TransferBufferManager> transfer_buffer_manager(
-      new gpu::TransferBufferManager(nullptr));
-  transfer_buffer_manager->Initialize();
-
-  scoped_ptr<gpu::CommandBufferService> command_buffer(
-      new gpu::CommandBufferService(transfer_buffer_manager.get()));
-  if (!command_buffer->Initialize())
-    return false;
-
-  scoped_refptr<gpu::gles2::ContextGroup> group(new gpu::gles2::ContextGroup(
-      gpu_preferences_, nullptr, nullptr,
-      new gpu::gles2::ShaderTranslatorCache(gpu_preferences_),
-      new gpu::gles2::FramebufferCompletenessCache, nullptr, nullptr, nullptr,
-      true));
-
-  scoped_ptr<gpu::gles2::GLES2Decoder> decoder(
-      gpu::gles2::GLES2Decoder::Create(group.get()));
-  if (!decoder.get())
-    return false;
-
-  scoped_ptr<gpu::CommandExecutor> command_executor(new gpu::CommandExecutor(
-      command_buffer.get(), decoder.get(), decoder.get()));
-
-  decoder->set_engine(command_executor.get());
-
-  scoped_refptr<gfx::GLContext> gl_context(gfx::GLContext::CreateGLContext(
-      nullptr, gl_surface, gfx::PreferDiscreteGpu));
-  if (!gl_context)
-    return false;
-
-  gl_context->MakeCurrent(gl_surface);
-
-  gpu::gles2::ContextCreationAttribHelper helper;
-  config_->GetAttrib(EGL_ALPHA_SIZE, &helper.alpha_size);
-  config_->GetAttrib(EGL_BLUE_SIZE, &helper.blue_size);
-  config_->GetAttrib(EGL_GREEN_SIZE, &helper.green_size);
-  config_->GetAttrib(EGL_RED_SIZE, &helper.red_size);
-  config_->GetAttrib(EGL_DEPTH_SIZE, &helper.depth_size);
-  config_->GetAttrib(EGL_STENCIL_SIZE, &helper.stencil_size);
-  config_->GetAttrib(EGL_SAMPLES, &helper.samples);
-  config_->GetAttrib(EGL_SAMPLE_BUFFERS, &helper.sample_buffers);
-
-  helper.buffer_preserved = false;
-  helper.bind_generates_resource = kBindGeneratesResources;
-  helper.fail_if_major_perf_caveat = false;
-  helper.lose_context_when_out_of_memory = kLoseContextWhenOutOfMemory;
-  helper.context_type = gpu::gles2::CONTEXT_TYPE_OPENGLES2;
-  std::vector<int32_t> attribs;
-  helper.Serialize(&attribs);
-
-  if (!decoder->Initialize(gl_surface, gl_context.get(),
-                           gl_surface->IsOffscreen(), gl_surface->GetSize(),
-                           gpu::gles2::DisallowedFeatures(), attribs)) {
-    return false;
-  }
-
-  command_buffer->SetPutOffsetChangeCallback(
-      base::Bind(&gpu::CommandExecutor::PutChanged,
-                 base::Unretained(command_executor.get())));
-  command_buffer->SetGetBufferChangeCallback(
-      base::Bind(&gpu::CommandExecutor::SetGetBuffer,
-                 base::Unretained(command_executor.get())));
-
-  scoped_ptr<gpu::gles2::GLES2CmdHelper> gles2_cmd_helper(
-      new gpu::gles2::GLES2CmdHelper(command_buffer.get()));
-  if (!gles2_cmd_helper->Initialize(kCommandBufferSize)) {
-    decoder->Destroy(true);
-    return false;
-  }
-
-  scoped_ptr<gpu::TransferBuffer> transfer_buffer(
-      new gpu::TransferBuffer(gles2_cmd_helper.get()));
-
-  gles2_cmd_helper_.reset(gles2_cmd_helper.release());
-  transfer_buffer_.reset(transfer_buffer.release());
-  command_buffer_.reset(command_buffer.release());
-  command_executor_.reset(command_executor.release());
-  decoder_.reset(decoder.release());
-  gl_context_ = gl_context.get();
-
-  scoped_ptr<gpu::gles2::GLES2Implementation> context(
-      new gpu::gles2::GLES2Implementation(
-          gles2_cmd_helper_.get(), nullptr, transfer_buffer_.get(),
-          kBindGeneratesResources, kLoseContextWhenOutOfMemory,
-          kSupportClientSideArrays, this));
-
-  if (!context->Initialize(kTransferBufferSize, kTransferBufferSize / 2,
-                           kTransferBufferSize * 2,
-                           gpu::gles2::GLES2Implementation::kNoLimit)) {
-    DestroyService();
-    return false;
-  }
-
-  context->EnableFeatureCHROMIUM("pepper3d_allow_buffers_on_multiple_targets");
-  context->EnableFeatureCHROMIUM("pepper3d_support_fixed_attribs");
-  client_gl_context_.reset(context.release());
-  return true;
-}
-
-void Context::DestroyService() {
-  DCHECK(HasService());
-  bool have_context = !WasServiceContextLost();
-  // The client gl interface might still be set to current global
-  // interface. This will be cleaned up in ApplyContextReleased
-  // with AutoCurrentContextRestore.
-  client_gl_context_.reset();
-  gl_context_ = nullptr;
-
-  transfer_buffer_.reset();
-  command_executor_.reset();
-  if (decoder_)
-    decoder_->Destroy(have_context);
-  gles2_cmd_helper_.reset();
-  command_buffer_.reset();
-}
-
-bool Context::HasService() const {
-  return decoder_ != nullptr;
-}
-
-void Context::MarkServiceContextLost() {
-  decoder_->MarkContextLost(gpu::error::kMakeCurrentFailed);
-}
-
-bool Context::WasServiceContextLost() const {
-  return decoder_->WasContextLost();
-}
-
-bool Context::IsCompatibleSurface(gfx::GLSurface* gl_surface) {
-  EGLint value = EGL_NONE;
-  config_->GetAttrib(EGL_SURFACE_TYPE, &value);
-  bool config_is_offscreen = (value & EGL_PBUFFER_BIT) != 0;
-  return gl_surface->IsOffscreen() == config_is_offscreen;
-}
-
-bool Context::Flush(gfx::GLSurface* gl_surface) {
-  if (WasServiceContextLost())
-    return false;
-  if (!gl_context_->MakeCurrent(gl_surface)) {
-    MarkServiceContextLost();
-    return false;
-  }
-  client_gl_context_->Flush();
-  return true;
-}
-
-}  // namespace egl