Mandoline: Merge Surfaces and Views apps

components/view_manager/surfaces/command_buffer_local.cc

+// Copyright 2015 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 "components/view_manager/surfaces/command_buffer_local.h"
+
+#include "base/bind.h"
+#include "gpu/command_buffer/service/context_group.h"
+#include "gpu/command_buffer/service/gpu_scheduler.h"
+#include "gpu/command_buffer/service/image_manager.h"
+#include "gpu/command_buffer/service/memory_tracking.h"
+#include "gpu/command_buffer/service/shader_translator_cache.h"
+#include "gpu/command_buffer/service/valuebuffer_manager.h"
+#include "ui/gfx/vsync_provider.h"
+#include "ui/gl/gl_bindings.h"
+#include "ui/gl/gl_context.h"
+#include "ui/gl/gl_image_ref_counted_memory.h"
+#include "ui/gl/gl_surface.h"
+
+namespace {
+
+size_t NumberOfPlanesForGpuMemoryBufferFormat(
+    gfx::BufferFormat format) {
+  switch (format) {
+    case gfx::BufferFormat::ATC:
+    case gfx::BufferFormat::ATCIA:
+    case gfx::BufferFormat::DXT1:
+    case gfx::BufferFormat::DXT5:
+    case gfx::BufferFormat::ETC1:
+    case gfx::BufferFormat::R_8:
+    case gfx::BufferFormat::RGBA_4444:
+    case gfx::BufferFormat::RGBA_8888:
+    case gfx::BufferFormat::RGBX_8888:
+    case gfx::BufferFormat::BGRA_8888:
+      return 1;
+    case gfx::BufferFormat::YUV_420:
+      return 3;
+  }
+  NOTREACHED();
+  return 0;
+}
+
+size_t SubsamplingFactor(gfx::BufferFormat format, int plane) {
+  switch (format) {
+    case gfx::BufferFormat::ATC:
+    case gfx::BufferFormat::ATCIA:
+    case gfx::BufferFormat::DXT1:
+    case gfx::BufferFormat::DXT5:
+    case gfx::BufferFormat::ETC1:
+    case gfx::BufferFormat::R_8:
+    case gfx::BufferFormat::RGBA_4444:
+    case gfx::BufferFormat::RGBA_8888:
+    case gfx::BufferFormat::RGBX_8888:
+    case gfx::BufferFormat::BGRA_8888:
+      return 1;
+    case gfx::BufferFormat::YUV_420: {
+      static size_t factor[] = {1, 2, 2};
+      DCHECK_LT(static_cast<size_t>(plane), arraysize(factor));
+      return factor[plane];
+    }
+  }
+  NOTREACHED();
+  return 0;
+}
+
+size_t StrideInBytes(size_t width, gfx::BufferFormat format, int plane) {
+  switch (format) {
+    case gfx::BufferFormat::ATCIA:
+    case gfx::BufferFormat::DXT5:
+      DCHECK_EQ(plane, 0);
+      return width;
+    case gfx::BufferFormat::ATC:
+    case gfx::BufferFormat::DXT1:
+    case gfx::BufferFormat::ETC1:
+      DCHECK_EQ(plane, 0);
+      DCHECK_EQ(width % 2, 0U);
+      return width / 2;
+    case gfx::BufferFormat::R_8:
+      return (width + 3) & ~0x3;
+    case gfx::BufferFormat::RGBA_4444:
+      DCHECK_EQ(plane, 0);
+      return width * 2;
+    case gfx::BufferFormat::RGBA_8888:
+    case gfx::BufferFormat::BGRA_8888:
+      DCHECK_EQ(plane, 0);
+      return width * 4;
+    case gfx::BufferFormat::RGBX_8888:
+      NOTREACHED();
+      return 0;
+    case gfx::BufferFormat::YUV_420:
+      return width / SubsamplingFactor(format, plane);
+  }
+
+  NOTREACHED();
+  return 0;
+}
+
+class MemoryTrackerStub : public gpu::gles2::MemoryTracker {
+ public:
+  MemoryTrackerStub() {}
+
+  void TrackMemoryAllocatedChange(
+      size_t old_size,
+      size_t new_size,
+      gpu::gles2::MemoryTracker::Pool pool) override {}
+
+  bool EnsureGPUMemoryAvailable(size_t size_needed) override { return true; };
+  uint64_t ClientTracingId() const override { return 0; }
+  int ClientId() const override { return 0; }
+
+ private:
+  ~MemoryTrackerStub() override {}
+
+  DISALLOW_COPY_AND_ASSIGN(MemoryTrackerStub);
+};
+
+size_t BufferSizeInBytes(const gfx::Size& size,
+                         gfx::BufferFormat format) {
+  size_t size_in_bytes = 0;
+  size_t num_planes = NumberOfPlanesForGpuMemoryBufferFormat(format);
+  for (size_t i = 0; i < num_planes; ++i) {
+    size_in_bytes += StrideInBytes(size.width(), format, i) *
+                     (size.height() / SubsamplingFactor(format, i));
+  }
+  return size_in_bytes;
+}
+
+class GpuMemoryBufferImpl : public gfx::GpuMemoryBuffer {
+ public:
+  GpuMemoryBufferImpl(base::RefCountedBytes* bytes,
+                      const gfx::Size& size,
+                      gfx::BufferFormat format)
+      : bytes_(bytes), size_(size), format_(format), mapped_(false) {}
+
+  static GpuMemoryBufferImpl* FromClientBuffer(ClientBuffer buffer) {
+    return reinterpret_cast<GpuMemoryBufferImpl*>(buffer);
+  }
+
+  // Overridden from gfx::GpuMemoryBuffer:
+  bool Map(void** data) override {
+    size_t offset = 0;
+    size_t num_planes = NumberOfPlanesForGpuMemoryBufferFormat(format_);
+    for (size_t i = 0; i < num_planes; ++i) {
+      data[i] = reinterpret_cast<uint8*>(&bytes_->data().front()) + offset;
+      offset += StrideInBytes(size_.width(), format_, i) *
+                (size_.height() / SubsamplingFactor(format_, i));
+    }
+    mapped_ = true;
+    return true;
+  }
+  void Unmap() override { mapped_ = false; }
+  bool IsMapped() const override { return mapped_; }
+  gfx::BufferFormat GetFormat() const override { return format_; }
+  gfx::GpuMemoryBufferId GetId() const override {
+    return 0;
+  }
+  void GetStride(int* stride) const override {
+    size_t num_planes = NumberOfPlanesForGpuMemoryBufferFormat(format_);
+    for (size_t i = 0; i < num_planes; ++i)
+      stride[i] = StrideInBytes(size_.width(), format_, i);
+  }
+  gfx::GpuMemoryBufferHandle GetHandle() const override {
+    NOTREACHED();
+    return gfx::GpuMemoryBufferHandle();
+  }
+  ClientBuffer AsClientBuffer() override {
+    return reinterpret_cast<ClientBuffer>(this);
+  }
+
+  base::RefCountedBytes* bytes() { return bytes_.get(); }
+
+ private:
+  scoped_refptr<base::RefCountedBytes> bytes_;
+  const gfx::Size size_;
+  gfx::BufferFormat format_;
+  bool mapped_;
+};
+
+}  // anonymous namespace
+
+namespace surfaces {
+
+CommandBufferLocal::CommandBufferLocal(
+    Client* client,
+    gfx::AcceleratedWidget widget,
+    const scoped_refptr<gles2::GpuState>& gpu_state)
+    : widget_(widget),
+      gpu_state_(gpu_state),
+      client_(client),
+      weak_factory_(this) {
+}
+
+CommandBufferLocal::~CommandBufferLocal() {
+  command_buffer_.reset();
+  if (decoder_.get()) {
+    bool have_context = decoder_->GetGLContext()->MakeCurrent(surface_.get());
+    decoder_->Destroy(have_context);
+    decoder_.reset();
+  }
+}
+
+// static
+scoped_ptr<gfx::GpuMemoryBuffer> CommandBufferLocal::CreateGpuMemoryBuffer(
+    const gfx::Size& size,
+    gfx::BufferFormat format) {
+  std::vector<unsigned char> data(BufferSizeInBytes(size, format), 0);
+  scoped_refptr<base::RefCountedBytes> bytes(new base::RefCountedBytes(data));
+  return make_scoped_ptr<gfx::GpuMemoryBuffer>(
+      new GpuMemoryBufferImpl(bytes.get(), size, format));
+}
+
+bool CommandBufferLocal::Initialize() {
+  if (widget_ == gfx::kNullAcceleratedWidget)
+    surface_ = gfx::GLSurface::CreateOffscreenGLSurface(gfx::Size(1, 1));
+  else {
+    surface_ = gfx::GLSurface::CreateViewGLSurface(widget_);
+    if (auto vsync_provider = surface_->GetVSyncProvider()) {
+      vsync_provider->GetVSyncParameters(
+          base::Bind(&CommandBufferLocal::OnUpdateVSyncParameters,
+                     weak_factory_.GetWeakPtr()));
+    }
+  }
+
+  if (!surface_.get())
+    return false;
+
+  // TODO(piman): virtual contexts, gpu preference.
+  context_ = gfx::GLContext::CreateGLContext(
+      gpu_state_->share_group(), surface_.get(), gfx::PreferIntegratedGpu);
+  if (!context_.get())
+    return false;
+
+  if (!context_->MakeCurrent(surface_.get()))
+    return false;
+
+  // TODO(piman): ShaderTranslatorCache is currently per-ContextGroup but
+  // only needs to be per-thread.
+  bool bind_generates_resource = false;
+  scoped_refptr<gpu::gles2::ContextGroup> context_group =
+      new gpu::gles2::ContextGroup(
+          gpu_state_->mailbox_manager(), new MemoryTrackerStub,
+          new gpu::gles2::ShaderTranslatorCache, nullptr, nullptr, nullptr,
+          bind_generates_resource);
+
+  command_buffer_.reset(
+      new gpu::CommandBufferService(context_group->transfer_buffer_manager()));
+  bool result = command_buffer_->Initialize();
+  DCHECK(result);
+
+  decoder_.reset(::gpu::gles2::GLES2Decoder::Create(context_group.get()));
+  scheduler_.reset(new gpu::GpuScheduler(command_buffer_.get(), decoder_.get(),
+                                         decoder_.get()));
+  decoder_->set_engine(scheduler_.get());
+  decoder_->SetResizeCallback(
+      base::Bind(&CommandBufferLocal::OnResize, base::Unretained(this)));
+  decoder_->SetWaitSyncPointCallback(base::Bind(
+      &CommandBufferLocal::OnWaitSyncPoint, base::Unretained(this)));
+
+  gpu::gles2::DisallowedFeatures disallowed_features;
+
+  // TODO(piman): attributes.
+  std::vector<int32> attrib_vector;
+  if (!decoder_->Initialize(surface_, context_, false /* offscreen */,
+                            gfx::Size(1, 1), disallowed_features,
+                            attrib_vector))
+    return false;
+
+  command_buffer_->SetPutOffsetChangeCallback(base::Bind(
+      &CommandBufferLocal::PumpCommands, base::Unretained(this)));
+  command_buffer_->SetGetBufferChangeCallback(base::Bind(
+      &gpu::GpuScheduler::SetGetBuffer, base::Unretained(scheduler_.get())));
+  command_buffer_->SetParseErrorCallback(
+      base::Bind(&CommandBufferLocal::OnParseError, base::Unretained(this)));
+  return true;
+}
+
+/******************************************************************************/
+// gpu::GpuControl:
+/******************************************************************************/
+
+gpu::Capabilities CommandBufferLocal::GetCapabilities() {
+  return decoder_->GetCapabilities();
+}
+
+int32_t CommandBufferLocal::CreateImage(ClientBuffer buffer,
+                                        size_t width,
+                                        size_t height,
+                                        unsigned internalformat) {
+  GpuMemoryBufferImpl* gpu_memory_buffer =
+      GpuMemoryBufferImpl::FromClientBuffer(buffer);
+
+  scoped_refptr<gfx::GLImageRefCountedMemory> image(
+      new gfx::GLImageRefCountedMemory(gfx::Size(width, height),
+                                       internalformat));
+  if (!image->Initialize(gpu_memory_buffer->bytes(),
+                         gpu_memory_buffer->GetFormat())) {
+    return -1;
+  }
+
+  static int32 next_id = 1;
+  int32 new_id = next_id++;
+
+  gpu::gles2::ImageManager* image_manager = decoder_->GetImageManager();
+  DCHECK(image_manager);
+  image_manager->AddImage(image.get(), new_id);
+  return new_id;
+}
+
+void CommandBufferLocal::DestroyImage(int32 id) {
+  gpu::gles2::ImageManager* image_manager = decoder_->GetImageManager();
+  DCHECK(image_manager);
+  image_manager->RemoveImage(id);
+}
+
+int32_t CommandBufferLocal::CreateGpuMemoryBufferImage(
+    size_t width,
+    size_t height,
+    unsigned internalformat,
+    unsigned usage) {
+  DCHECK_EQ(usage, static_cast<unsigned>(GL_MAP_CHROMIUM));
+  scoped_ptr<gfx::GpuMemoryBuffer> buffer = CreateGpuMemoryBuffer(
+      gfx::Size(width, height), gfx::BufferFormat::RGBA_8888);
+  return CreateImage(buffer->AsClientBuffer(), width, height, internalformat);
+}
+
+uint32_t CommandBufferLocal::InsertSyncPoint() {
+  return 0;
+}
+
+uint32_t CommandBufferLocal::InsertFutureSyncPoint() {
+  NOTIMPLEMENTED();
+  return 0;
+}
+
+void CommandBufferLocal::RetireSyncPoint(uint32_t sync_point) {
+  NOTIMPLEMENTED();
+}
+
+void CommandBufferLocal::SignalSyncPoint(uint32_t sync_point,
+                                              const base::Closure& callback) {
+}
+
+void CommandBufferLocal::SignalQuery(uint32_t query,
+                                     const base::Closure& callback) {
+  // TODO(piman)
+  NOTIMPLEMENTED();
+}
+
+void CommandBufferLocal::SetSurfaceVisible(bool visible) {
+  // TODO(piman)
+  NOTIMPLEMENTED();
+}
+
+uint32_t CommandBufferLocal::CreateStreamTexture(uint32_t texture_id) {
+  // TODO(piman)
+  NOTIMPLEMENTED();
+  return 0;
+}
+
+void CommandBufferLocal::SetLock(base::Lock* lock) {
+  NOTIMPLEMENTED();
+}
+
+bool CommandBufferLocal::IsGpuChannelLost() {
+  // This is only possible for out-of-process command buffers.
+  return false;
+}
+
+void CommandBufferLocal::PumpCommands() {
+  if (!decoder_->MakeCurrent()) {
+    command_buffer_->SetContextLostReason(decoder_->GetContextLostReason());
+    command_buffer_->SetParseError(::gpu::error::kLostContext);
+    return;
+  }
+  scheduler_->PutChanged();
+}
+
+void CommandBufferLocal::OnResize(gfx::Size size, float scale_factor) {
+  surface_->Resize(size);
+}
+
+void CommandBufferLocal::OnUpdateVSyncParameters(
+    const base::TimeTicks timebase,
+    const base::TimeDelta interval) {
+  if (client_)
+    client_->UpdateVSyncParameters(timebase.ToInternalValue(),
+                                   interval.ToInternalValue());
+
+}
+
+bool CommandBufferLocal::OnWaitSyncPoint(uint32_t sync_point) {
+  if (!sync_point)
+    return true;
+  if (gpu_state_->sync_point_manager()->IsSyncPointRetired(sync_point))
+    return true;
+  scheduler_->SetScheduled(false);
+  gpu_state_->sync_point_manager()->AddSyncPointCallback(
+      sync_point, base::Bind(&CommandBufferLocal::OnSyncPointRetired,
+                             weak_factory_.GetWeakPtr()));
+  return scheduler_->IsScheduled();
+}
+
+void CommandBufferLocal::OnParseError() {
+  gpu::CommandBuffer::State state = command_buffer_->GetLastState();
+  OnContextLost(state.context_lost_reason);
+}
+
+void CommandBufferLocal::OnContextLost(uint32_t reason) {
+  if (client_)
+    client_->DidLoseContext();
+}
+
+void CommandBufferLocal::OnSyncPointRetired() {
+  scheduler_->SetScheduled(true);
+}
+
+}  // namespace surfaces