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mojo/gles2/gles2_context.cc

+// Copyright 2014 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 "mojo/gles2/gles2_context.h"
+
+#include "gpu/command_buffer/client/gles2_cmd_helper.h"
+#include "gpu/command_buffer/client/gles2_implementation.h"
+#include "gpu/command_buffer/client/transfer_buffer.h"
+#include "mojo/public/c/gles2/gles2.h"
+#include "mojo/public/cpp/system/core.h"
+
+namespace gles2 {
+
+namespace {
+const size_t kDefaultCommandBufferSize = 1024 * 1024;
+const size_t kDefaultStartTransferBufferSize = 1 * 1024 * 1024;
+const size_t kDefaultMinTransferBufferSize = 1 * 256 * 1024;
+const size_t kDefaultMaxTransferBufferSize = 16 * 1024 * 1024;
+}
+
+GLES2Context::GLES2Context(const MojoAsyncWaiter* async_waiter,
+                           mojo::ScopedMessagePipeHandle command_buffer_handle,
+                           MojoGLES2ContextLost lost_callback,
+                           void* closure)
+    : command_buffer_(this, async_waiter, command_buffer_handle.Pass()),
+      lost_callback_(lost_callback),
+      closure_(closure) {
+}
+
+GLES2Context::~GLES2Context() {}
+
+bool GLES2Context::Initialize() {
+  if (!command_buffer_.Initialize())
+    return false;
+  gles2_helper_.reset(new gpu::gles2::GLES2CmdHelper(&command_buffer_));
+  if (!gles2_helper_->Initialize(kDefaultCommandBufferSize))
+    return false;
+  gles2_helper_->SetAutomaticFlushes(false);
+  transfer_buffer_.reset(new gpu::TransferBuffer(gles2_helper_.get()));
+  gpu::Capabilities capabilities = command_buffer_.GetCapabilities();
+  bool bind_generates_resource =
+      !!capabilities.bind_generates_resource_chromium;
+  // TODO(piman): Some contexts (such as compositor) want this to be true, so
+  // this needs to be a public parameter.
+  bool lose_context_when_out_of_memory = false;
+  bool support_client_side_arrays = false;
+  implementation_.reset(
+      new gpu::gles2::GLES2Implementation(gles2_helper_.get(),
+                                          NULL,
+                                          transfer_buffer_.get(),
+                                          bind_generates_resource,
+                                          lose_context_when_out_of_memory,
+                                          support_client_side_arrays,
+                                          &command_buffer_));
+  return implementation_->Initialize(kDefaultStartTransferBufferSize,
+                                     kDefaultMinTransferBufferSize,
+                                     kDefaultMaxTransferBufferSize,
+                                     gpu::gles2::GLES2Implementation::kNoLimit);
+}
+
+void GLES2Context::ContextLost() { lost_callback_(closure_); }
+
+}  // namespace gles2