components/html_viewer/web_graphics_context_3d_command_buffer_impl.cc

   1 // Copyright 2015 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 "components/html_viewer/web_graphics_context_3d_command_buffer_impl.h"
   6
   7 #include "components/mus/public/interfaces/gpu.mojom.h"
   8 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
   9 #include "mojo/application/public/cpp/application_impl.h"
  10 #include "mojo/cc/context_provider_mojo.h"
  11 #include "mojo/gles2/gles2_context.h"
  12 #include "mojo/gpu/mojo_gles2_impl_autogen.h"
  13 #include "third_party/mojo/src/mojo/public/cpp/environment/environment.h"
  14
  15 namespace html_viewer {
  16
  17 WebGraphicsContext3DCommandBufferImpl::WebGraphicsContext3DCommandBufferImpl(
  18     mojo::ApplicationImpl* app,
  19     const GURL& active_url,
  20     const blink::WebGraphicsContext3D::Attributes& attributes,
  21     blink::WebGraphicsContext3D* share_context,
  22     blink::WebGLInfo* gl_info) {
  23   mojo::URLRequestPtr request(mojo::URLRequest::New());
  24   request->url = mojo::String::From("mojo:mus");
  25   mojo::GpuPtr gpu_service;
  26   app->ConnectToService(request.Pass(), &gpu_service);
  27
  28   mojo::CommandBufferPtr cb;
  29   gpu_service->CreateOffscreenGLES2Context(GetProxy(&cb));
  30   command_buffer_handle_ = cb.PassInterface().PassHandle();
  31   CHECK(command_buffer_handle_.is_valid());
  32   // TODO(penghuang): Support share context.
  33   // TODO(penghuang): Fill gl_info.
  34   gpu::gles2::ContextCreationAttribHelper attrib_helper;
  35   attrib_helper.alpha_size = attributes.alpha ? 8 : 0;
  36   attrib_helper.depth_size = attributes.depth ? 24 : 0;
  37   attrib_helper.stencil_size = attributes.stencil ? 8 : 0;
  38   attrib_helper.samples = attributes.antialias ? 4 : 0;
  39   attrib_helper.sample_buffers = attributes.antialias ? 1 : 0;
  40   attrib_helper.fail_if_major_perf_caveat =
  41       attributes.failIfMajorPerformanceCaveat;
  42   attrib_helper.bind_generates_resource = false;
  43   attrib_helper.webgl_version = attributes.webGLVersion;
  44   std::vector<int32_t> attrib_vector;
  45   attrib_helper.Serialize(&attrib_vector);
  46   gles2_context_ = MojoGLES2CreateContext(
  47       command_buffer_handle_.release().value(),
  48       attrib_vector.data(),
  49       &ContextLostThunk,
  50       this,
  51       mojo::Environment::GetDefaultAsyncWaiter());
  52   context_gl_.reset(new mojo::MojoGLES2Impl(gles2_context_));
  53   setGLInterface(context_gl_.get());
  54 }
  55
  56 WebGraphicsContext3DCommandBufferImpl::
  57     ~WebGraphicsContext3DCommandBufferImpl() {
  58   if (gles2_context_)
  59     MojoGLES2DestroyContext(gles2_context_);
  60 }
  61
  62 // static
  63 WebGraphicsContext3DCommandBufferImpl*
  64 WebGraphicsContext3DCommandBufferImpl::CreateOffscreenContext(
  65     mojo::ApplicationImpl* app,
  66     const GURL& active_url,
  67     const blink::WebGraphicsContext3D::Attributes& attributes,
  68     blink::WebGraphicsContext3D* share_context,
  69     blink::WebGLInfo* gl_info) {
  70   return new WebGraphicsContext3DCommandBufferImpl(
  71       app, active_url, attributes, share_context, gl_info);
  72 }
  73
  74 void WebGraphicsContext3DCommandBufferImpl::ContextLost() {
  75   if (context_lost_callback_)
  76     context_lost_callback_->onContextLost();
  77 }
  78
  79 }  // namespace html_viewer