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// Copyright (c) 2012 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 "content/renderer/pepper/pepper_platform_context_3d_impl.h"
#include "base/bind.h"
#include "content/common/gpu/client/gpu_channel_host.h"
#include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
#include "content/renderer/pepper/pepper_parent_context_provider.h"
#include "content/renderer/render_thread_impl.h"
#include "googleurl/src/gurl.h"
#include "gpu/command_buffer/client/gles2_cmd_helper.h"
#include "gpu/command_buffer/client/gles2_implementation.h"
#include "gpu/ipc/command_buffer_proxy.h"
#include "ppapi/c/pp_graphics_3d.h"
#include "ui/gl/gpu_preference.h"
#ifdef ENABLE_GPU
namespace content {
PlatformContext3DImpl::PlatformContext3DImpl(
PepperParentContextProvider* parent_context_provider)
: parent_context_provider_(parent_context_provider),
parent_texture_id_(0),
has_alpha_(false),
command_buffer_(NULL),
weak_ptr_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
}
PlatformContext3DImpl::~PlatformContext3DImpl() {
if (parent_context_.get() && parent_texture_id_ != 0) {
// Flush any remaining commands in the parent context to make sure the
// texture id accounting stays consistent.
gpu::gles2::GLES2Implementation* parent_gles2 =
parent_context_->GetImplementation();
parent_gles2->helper()->CommandBufferHelper::Finish();
parent_gles2->FreeTextureId(parent_texture_id_);
}
if (command_buffer_) {
DCHECK(channel_.get());
channel_->DestroyCommandBuffer(command_buffer_);
command_buffer_ = NULL;
}
channel_ = NULL;
}
bool PlatformContext3DImpl::Init(const int32* attrib_list,
PlatformContext3D* share_context) {
// Ignore initializing more than once.
if (command_buffer_)
return true;
if (!parent_context_provider_)
return false;
RenderThreadImpl* render_thread = RenderThreadImpl::current();
if (!render_thread)
return false;
gfx::GpuPreference gpu_preference = gfx::PreferDiscreteGpu;
channel_ = render_thread->EstablishGpuChannelSync(
CAUSE_FOR_GPU_LAUNCH_PEPPERPLATFORMCONTEXT3DIMPL_INITIALIZE);
if (!channel_.get())
return false;
DCHECK(channel_->state() == GpuChannelHost::kConnected);
gfx::Size surface_size;
std::vector<int32> attribs;
// TODO(alokp): Change GpuChannelHost::CreateOffscreenCommandBuffer()
// interface to accept width and height in the attrib_list so that
// we do not need to filter for width and height here.
if (attrib_list) {
for (const int32_t* attr = attrib_list;
attr[0] != PP_GRAPHICS3DATTRIB_NONE;
attr += 2) {
switch (attr[0]) {
case PP_GRAPHICS3DATTRIB_WIDTH:
surface_size.set_width(attr[1]);
break;
case PP_GRAPHICS3DATTRIB_HEIGHT:
surface_size.set_height(attr[1]);
break;
case PP_GRAPHICS3DATTRIB_ALPHA_SIZE:
has_alpha_ = attr[1] > 0;
// fall-through
default:
attribs.push_back(attr[0]);
attribs.push_back(attr[1]);
break;
}
}
attribs.push_back(PP_GRAPHICS3DATTRIB_NONE);
}
CommandBufferProxy* share_buffer = NULL;
if (share_context) {
PlatformContext3DImpl* share_impl =
static_cast<PlatformContext3DImpl*>(share_context);
share_buffer = share_impl->command_buffer_;
}
command_buffer_ = channel_->CreateOffscreenCommandBuffer(
surface_size,
share_buffer,
"*",
attribs,
GURL::EmptyGURL(),
gpu_preference);
if (!command_buffer_)
return false;
command_buffer_->SetChannelErrorCallback(
base::Bind(&PlatformContext3DImpl::OnContextLost,
weak_ptr_factory_.GetWeakPtr()));
command_buffer_->SetOnConsoleMessageCallback(
base::Bind(&PlatformContext3DImpl::OnConsoleMessage,
weak_ptr_factory_.GetWeakPtr()));
// Fetch the parent context now, after any potential shutdown of the
// channel due to GPU switching, and creation of the Pepper 3D
// context with the discrete GPU preference.
WebGraphicsContext3DCommandBufferImpl* parent_context =
parent_context_provider_->GetParentContextForPlatformContext3D();
if (!parent_context)
return false;
parent_context_provider_ = NULL;
parent_context_ = parent_context->AsWeakPtr();
// Flush any remaining commands in the parent context to make sure the
// texture id accounting stays consistent.
gpu::gles2::GLES2Implementation* parent_gles2 =
parent_context_->GetImplementation();
parent_gles2->helper()->CommandBufferHelper::Finish();
parent_texture_id_ = parent_gles2->MakeTextureId();
CommandBufferProxy* parent_command_buffer =
parent_context_->GetCommandBufferProxy();
if (!command_buffer_->SetParent(parent_command_buffer, parent_texture_id_))
return false;
return true;
}
unsigned PlatformContext3DImpl::GetBackingTextureId() {
DCHECK(command_buffer_);
return parent_texture_id_;
}
bool PlatformContext3DImpl::IsOpaque() {
DCHECK(command_buffer_);
return !has_alpha_;
}
gpu::CommandBuffer* PlatformContext3DImpl::GetCommandBuffer() {
return command_buffer_;
}
int PlatformContext3DImpl::GetCommandBufferRouteId() {
DCHECK(command_buffer_);
return command_buffer_->GetRouteID();
}
void PlatformContext3DImpl::SetContextLostCallback(const base::Closure& task) {
context_lost_callback_ = task;
}
void PlatformContext3DImpl::SetOnConsoleMessageCallback(
const ConsoleMessageCallback& task) {
console_message_callback_ = task;
}
bool PlatformContext3DImpl::Echo(const base::Closure& task) {
return command_buffer_->Echo(task);
}
void PlatformContext3DImpl::OnContextLost() {
DCHECK(command_buffer_);
if (!context_lost_callback_.is_null())
context_lost_callback_.Run();
}
void PlatformContext3DImpl::OnConsoleMessage(const std::string& msg, int id) {
DCHECK(command_buffer_);
if (!console_message_callback_.is_null())
console_message_callback_.Run(msg, id);
}
} // namespace content
#endif // ENABLE_GPU
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