win8/metro_driver/print_document_source.cc - chromium/src.git - Git at Google

 // 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 "stdafx.h"
 #include "win8/metro_driver/print_document_source.h"

 #include <windows.graphics.display.h>

 #include "base/logging.h"
 #include "base/numerics/safe_conversions.h"


 namespace {

 class D2DFactoryAutoLock {
  public:
   explicit D2DFactoryAutoLock(ID2D1Factory* d2d_factory) {
     HRESULT hr = d2d_factory->QueryInterface(IID_PPV_ARGS(&d2d_multithread_));
     if (d2d_multithread_.Get())
       d2d_multithread_->Enter();
     else
       NOTREACHED() << "Failed to QI for ID2D1Multithread " << std::hex << hr;
   }

   ~D2DFactoryAutoLock() {
     if (d2d_multithread_.Get())
       d2d_multithread_->Leave();
   }

  private:
   mswr::ComPtr<ID2D1Multithread> d2d_multithread_;
 };

 // TODO(mad): remove once we don't run mixed SDK/OS anymore.
 const GUID kOldPackageTargetGuid =
     {0xfb2a33c0, 0x8c35, 0x465f,
       {0xbe, 0xd5, 0x9f, 0x36, 0x89, 0x51, 0x77, 0x52}};
 const GUID kNewPackageTargetGuid =
     {0x1a6dd0ad, 0x1e2a, 0x4e99,
       {0xa5, 0xba, 0x91, 0xf1, 0x78, 0x18, 0x29, 0x0e}};


 }  // namespace

 namespace metro_driver {

 PrintDocumentSource::PrintDocumentSource()
     : page_count_ready_(true, false),
       parent_lock_(NULL),
       height_(0),
       width_(0),
       dpi_(96),
       aborted_(false),
       using_old_preview_interface_(false) {
 }

 HRESULT PrintDocumentSource::RuntimeClassInitialize(
     const DirectXContext& directx_context,
     base::Lock* parent_lock) {
   DCHECK(parent_lock != NULL);
   DCHECK(directx_context.d2d_context.Get() != NULL);
   DCHECK(directx_context.d2d_device.Get() != NULL);
   DCHECK(directx_context.d2d_factory.Get() != NULL);
   DCHECK(directx_context.d3d_device.Get() != NULL);
   DCHECK(directx_context.wic_factory.Get() != NULL);
   directx_context_ = directx_context;

   // No other method can be called before RuntimeClassInitialize which is called
   // during the construction via mswr::MakeAndInitialize(), so it's safe for all
   // other methods to use the parent_lock_ without checking if it's NULL.
   DCHECK(parent_lock_ == NULL);
   parent_lock_ = parent_lock;

   return S_OK;
 }

 void PrintDocumentSource::Abort() {
   base::AutoLock lock(*parent_lock_);
   aborted_ = true;
   if (page_count_ready_.IsSignaled()) {
     pages_.clear();
     for (size_t i = 0; i < pages_ready_state_.size(); ++i)
       pages_ready_state_[i]->Broadcast();
   } else {
     DCHECK(pages_.empty() && pages_ready_state_.empty());
   }
 }

 STDMETHODIMP PrintDocumentSource::GetPreviewPageCollection(
     IPrintDocumentPackageTarget* package_target,
     IPrintPreviewPageCollection** page_collection) {
   DVLOG(1) << __FUNCTION__;
   DCHECK(package_target != NULL);
   DCHECK(page_collection != NULL);

   HRESULT hr = package_target->GetPackageTarget(
       __uuidof(IPrintPreviewDxgiPackageTarget),
       IID_PPV_ARGS(&dxgi_preview_target_));
   if (FAILED(hr)) {
     // TODO(mad): remove once we don't run mixed SDK/OS anymore.
     // The IID changed from one version of the SDK to another, so try the other
     // one in case we are running a build from a different SDK than the one
     // related to the OS version we are running.
     GUID package_target_uuid = kNewPackageTargetGuid;
     if (package_target_uuid == __uuidof(IPrintPreviewDxgiPackageTarget)) {
       package_target_uuid = kOldPackageTargetGuid;
       using_old_preview_interface_ = true;
     }
     hr = package_target->GetPackageTarget(package_target_uuid,
                                           package_target_uuid,
                                           &dxgi_preview_target_);
     if (FAILED(hr)) {
       LOG(ERROR) << "Failed to get IPrintPreviewDXGIPackageTarget " << std::hex
                  << hr;
       return hr;
     }
   } else {
     using_old_preview_interface_ = (__uuidof(IPrintPreviewDxgiPackageTarget) ==
                                     kOldPackageTargetGuid);
   }

   mswr::ComPtr<IPrintPreviewPageCollection> preview_page_collection;
   mswr::ComPtr<PrintDocumentSource> print_document_source(this);
   hr = print_document_source.As(&preview_page_collection);
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to get preview_page_collection " << std::hex << hr;
     return hr;
   }

   hr = preview_page_collection.CopyTo(page_collection);
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to copy preview_page_collection " << std::hex << hr;
     return hr;
   }
   return hr;
 }

 STDMETHODIMP PrintDocumentSource::MakeDocument(
     IInspectable* options,
     IPrintDocumentPackageTarget* package_target) {
   DVLOG(1) << __FUNCTION__;
   DCHECK(options != NULL);
   DCHECK(package_target != NULL);

   mswr::ComPtr<wingfx::Printing::IPrintTaskOptionsCore> print_task_options;
   HRESULT hr = options->QueryInterface(
       wingfx::Printing::IID_IPrintTaskOptionsCore,
       reinterpret_cast<void**>(print_task_options.GetAddressOf()));
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to QI for IPrintTaskOptionsCore " << std::hex << hr;
     return hr;
   }

   // Use the first page's description for the whole document. Page numbers
   // are 1-based in this context.
   // TODO(mad): Check if it would be useful to use per page descriptions.
   wingfx::Printing::PrintPageDescription page_desc = {};
   hr = print_task_options->GetPageDescription(1 /* page */, &page_desc);
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to GetPageDescription " << std::hex << hr;
     return hr;
   }

   D2D1_PRINT_CONTROL_PROPERTIES print_control_properties;
   if (page_desc.DpiX > page_desc.DpiY)
     print_control_properties.rasterDPI = static_cast<float>(page_desc.DpiY);
   else
     print_control_properties.rasterDPI = static_cast<float>(page_desc.DpiX);

   // Color space for vector graphics in D2D print control.
   print_control_properties.colorSpace = D2D1_COLOR_SPACE_SRGB;
   print_control_properties.fontSubset = D2D1_PRINT_FONT_SUBSET_MODE_DEFAULT;

   mswr::ComPtr<ID2D1PrintControl> print_control;
   hr = directx_context_.d2d_device->CreatePrintControl(
       directx_context_.wic_factory.Get(),
       package_target,
       print_control_properties,
       print_control.GetAddressOf());
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to CreatePrintControl " << std::hex << hr;
     return hr;
   }

   D2D1_SIZE_F page_size = D2D1::SizeF(page_desc.PageSize.Width,
                                       page_desc.PageSize.Height);

   // Wait for the number of pages to be available.
   // If an abort occured, we'll get 0 and won't enter the loop below.
   size_t page_count = WaitAndGetPageCount();

   mswr::ComPtr<ID2D1GdiMetafile> gdi_metafile;
   for (size_t page = 0; page < page_count; ++page) {
     gdi_metafile.Reset();
     hr = WaitAndGetPage(page, gdi_metafile.GetAddressOf());
     LOG_IF(ERROR, FAILED(hr)) << "Failed to get page's metafile " << std::hex
                               << hr;
     // S_FALSE means we got aborted.
     if (hr == S_FALSE || FAILED(hr))
       break;
     hr = PrintPage(print_control.Get(), gdi_metafile.Get(), page_size);
     if (FAILED(hr))
       break;
   }

   HRESULT close_hr = print_control->Close();
   if (FAILED(close_hr) && SUCCEEDED(hr))
     return close_hr;
   else
     return hr;
 }

 STDMETHODIMP PrintDocumentSource::Paginate(uint32 page,
                                            IInspectable* options) {
   DVLOG(1) << __FUNCTION__ << ", page = " << page;
   DCHECK(options != NULL);
   // GetPreviewPageCollection must have been successfuly called.
   DCHECK(dxgi_preview_target_.Get() != NULL);

   // Get print settings from PrintTaskOptions for preview, such as page
   // description, which contains page size, imageable area, DPI.
   // TODO(mad): obtain other print settings in the same way, such as ColorMode,
   // NumberOfCopies, etc...
   mswr::ComPtr<wingfx::Printing::IPrintTaskOptionsCore> print_options;
   HRESULT hr = options->QueryInterface(
       wingfx::Printing::IID_IPrintTaskOptionsCore,
       reinterpret_cast<void**>(print_options.GetAddressOf()));
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to QI for IPrintTaskOptionsCore " << std::hex << hr;
     return hr;
   }

   wingfx::Printing::PrintPageDescription page_desc = {};
   hr = print_options->GetPageDescription(1 /* page */, &page_desc);
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to GetPageDescription " << std::hex << hr;
     return hr;
   }

   width_ = page_desc.PageSize.Width;
   height_ = page_desc.PageSize.Height;

   hr = dxgi_preview_target_->InvalidatePreview();
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to InvalidatePreview " << std::hex << hr;
     return hr;
   }

   size_t page_count = WaitAndGetPageCount();
   // A page_count of 0 means abort...
   if (page_count == 0)
     return S_FALSE;
   hr = dxgi_preview_target_->SetJobPageCount(
            PageCountType::FinalPageCount,
            base::checked_cast<UINT32>(page_count));
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to SetJobPageCount " << std::hex << hr;
     return hr;
   }
   return hr;
 }

 STDMETHODIMP PrintDocumentSource::MakePage(uint32 job_page,
                                            float width,
                                            float height) {
   DVLOG(1) << __FUNCTION__ << ", width: " << width << ", height: " << height
           << ", job_page: " << job_page;
   DCHECK(width > 0 && height > 0);
   // Paginate must have been called before this.
   if (width_ <= 0.0 || height_ <= 0.0)
     return S_FALSE;

   // When job_page is JOB_PAGE_APPLICATION_DEFINED, it means a new preview
   // begins. TODO(mad): Double check if we need to cancel pending resources.
   if (job_page == JOB_PAGE_APPLICATION_DEFINED)
     job_page = 1;

   winfoundtn::Size preview_size;
   preview_size.Width  = width;
   preview_size.Height = height;
   float scale = width_ / width;

   mswr::ComPtr<ID2D1Factory> factory;
   directx_context_.d2d_device->GetFactory(&factory);

   mswr::ComPtr<ID2D1GdiMetafile> gdi_metafile;
   HRESULT hr = WaitAndGetPage(job_page - 1, gdi_metafile.GetAddressOf());
   LOG_IF(ERROR, FAILED(hr)) << "Failed to get page's metafile " << std::hex
                             << hr;
   // Again, S_FALSE means we got aborted.
   if (hr == S_FALSE || FAILED(hr))
     return hr;

   // We are accessing D3D resources directly without D2D's knowledge, so we
   // must manually acquire the D2D factory lock.
   D2DFactoryAutoLock factory_lock(directx_context_.d2d_factory.Get());

   CD3D11_TEXTURE2D_DESC texture_desc(
       DXGI_FORMAT_B8G8R8A8_UNORM,
       static_cast<UINT32>(ceil(width  * dpi_ / 96)),
       static_cast<UINT32>(ceil(height * dpi_ / 96)),
       1,
       1,
       D3D11_BIND_RENDER_TARGET | D3D11_BIND_SHADER_RESOURCE
       );
   mswr::ComPtr<ID3D11Texture2D> texture;
   hr = directx_context_.d3d_device->CreateTexture2D(
       &texture_desc, NULL, &texture);
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to create a 2D texture " << std::hex << hr;
     return hr;
   }

   mswr::ComPtr<IDXGISurface> dxgi_surface;
   hr = texture.As<IDXGISurface>(&dxgi_surface);
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to QI for IDXGISurface " << std::hex << hr;
     return hr;
   }

   // D2D device contexts are stateful, and hence a unique device context must
   // be used on each call.
   mswr::ComPtr<ID2D1DeviceContext> d2d_context;
   hr = directx_context_.d2d_device->CreateDeviceContext(
       D2D1_DEVICE_CONTEXT_OPTIONS_NONE, &d2d_context);

   d2d_context->SetDpi(dpi_, dpi_);

   mswr::ComPtr<ID2D1Bitmap1> d2dSurfaceBitmap;
   hr = d2d_context->CreateBitmapFromDxgiSurface(dxgi_surface.Get(),
                                                 NULL,  // default properties.
                                                 &d2dSurfaceBitmap);
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to CreateBitmapFromDxgiSurface " << std::hex << hr;
     return hr;
   }

   d2d_context->SetTarget(d2dSurfaceBitmap.Get());
   d2d_context->BeginDraw();
   d2d_context->Clear();
   d2d_context->SetTransform(D2D1::Matrix3x2F(1/scale, 0, 0, 1/scale, 0, 0));
   d2d_context->DrawGdiMetafile(gdi_metafile.Get());

   hr = d2d_context->EndDraw();
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to EndDraw " << std::hex << hr;
     return hr;
   }

 // TODO(mad): remove once we don't run mixed SDK/OS anymore.
 #ifdef __IPrintPreviewDxgiPackageTarget_FWD_DEFINED__
   FLOAT dpi = dpi_;
   if (using_old_preview_interface_) {
     // We compiled with the new API but run on the old OS, so we must cheat
     // and send something that looks like a float but has a UINT32 value.
     *reinterpret_cast<UINT32*>(&dpi) = static_cast<UINT32>(dpi_);
   }
 #else
   UINT32 dpi = static_cast<UINT32>(dpi_);
   if (!using_old_preview_interface_) {
     // We compiled with the old API but run on the new OS, so we must cheat
     // and send something that looks like a UINT32 but has a float value.
     *reinterpret_cast<FLOAT*>(&dpi) = dpi_;
   }
 #endif  // __IPrintPreviewDxgiPackageTarget_FWD_DEFINED__
   hr = dxgi_preview_target_->DrawPage(job_page, dxgi_surface.Get(), dpi, dpi);
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to DrawPage " << std::hex << hr;
     return hr;
   }
   return hr;
 }

 void PrintDocumentSource::ResetDpi(float dpi) {
   {
     base::AutoLock lock(*parent_lock_);
     if (dpi == dpi_)
       return;
     dpi_ = dpi;
   }
   directx_context_.d2d_context->SetDpi(dpi, dpi);
 }

 void PrintDocumentSource::SetPageCount(size_t page_count) {
   DCHECK(page_count > 0);
   {
     base::AutoLock lock(*parent_lock_);
     DCHECK(!page_count_ready_.IsSignaled());
     DCHECK(pages_.empty() && pages_ready_state_.empty());

     pages_.resize(page_count);
     pages_ready_state_.resize(page_count);

     for (size_t i = 0; i < page_count; ++i)
       pages_ready_state_[i] = new base::ConditionVariable(parent_lock_);
   }
   page_count_ready_.Signal();
 }

 void PrintDocumentSource::AddPage(size_t page_number,
                                   IStream* metafile_stream) {
   DCHECK(metafile_stream != NULL);
   base::AutoLock lock(*parent_lock_);

   DCHECK(page_count_ready_.IsSignaled());
   DCHECK(page_number < pages_.size());

   pages_[page_number] = metafile_stream;
   pages_ready_state_[page_number]->Signal();
 }

 HRESULT PrintDocumentSource::PrintPage(ID2D1PrintControl* print_control,
                                        ID2D1GdiMetafile* gdi_metafile,
                                        D2D1_SIZE_F page_size) {
   DVLOG(1) << __FUNCTION__ << ", page_size: (" << page_size.width << ", "
           << page_size.height << ")";
   DCHECK(print_control != NULL);
   DCHECK(gdi_metafile != NULL);

   // D2D device contexts are stateful, and hence a unique device context must
   // be used on each call.
   mswr::ComPtr<ID2D1DeviceContext> d2d_context;
   HRESULT hr = directx_context_.d2d_device->CreateDeviceContext(
       D2D1_DEVICE_CONTEXT_OPTIONS_NONE, &d2d_context);
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to CreateDeviceContext " << std::hex << hr;
     return hr;
   }

   mswr::ComPtr<ID2D1CommandList> print_command_list;
   hr = d2d_context->CreateCommandList(&print_command_list);
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to CreateCommandList " << std::hex << hr;
     return hr;
   }

   d2d_context->SetTarget(print_command_list.Get());

   d2d_context->BeginDraw();
   d2d_context->DrawGdiMetafile(gdi_metafile);
   hr = d2d_context->EndDraw();
   LOG_IF(ERROR, FAILED(hr)) << "Failed to EndDraw " << std::hex << hr;

   // Make sure to always close the command list.
   HRESULT close_hr = print_command_list->Close();
   LOG_IF(ERROR, FAILED(close_hr)) << "Failed to close command list " << std::hex
                                   << hr;
   if (SUCCEEDED(hr) && SUCCEEDED(close_hr))
     hr = print_control->AddPage(print_command_list.Get(), page_size, NULL);
   if (FAILED(hr))
     return hr;
   else
     return close_hr;
 }

 size_t PrintDocumentSource::WaitAndGetPageCount() {
   // Properly protect the wait/access to the page count.
   {
     base::AutoLock lock(*parent_lock_);
     if (aborted_)
       return 0;
     DCHECK(pages_.size() == pages_ready_state_.size());
     if (!pages_.empty())
       return pages_.size();
   }
   page_count_ready_.Wait();
   {
     base::AutoLock lock(*parent_lock_);
     if (!aborted_) {
       DCHECK(pages_.size() == pages_ready_state_.size());
       return pages_.size();
     }
   }
   // A page count of 0 means abort.
   return 0;
 }

 HRESULT PrintDocumentSource::WaitAndGetPage(size_t page_number,
                                             ID2D1GdiMetafile** gdi_metafile) {
   // Properly protect the wait/access to the page data.
   base::AutoLock lock(*parent_lock_);
   // Make sure we weren't canceled before getting here.
   // And the page count should have been received before we get here too.
   if (aborted_)
     return S_FALSE;

   // We shouldn't be asked for a page until we got the page count.
   DCHECK(page_count_ready_.IsSignaled());
   DCHECK(page_number <= pages_ready_state_.size());
   DCHECK(pages_.size() == pages_ready_state_.size());
   while (!aborted_ && pages_[page_number].Get() == NULL)
     pages_ready_state_[page_number]->Wait();

   // Make sure we weren't aborted while we waited unlocked.
   if (aborted_)
     return S_FALSE;
   DCHECK(page_number < pages_.size());

   mswr::ComPtr<ID2D1Factory> factory;
   directx_context_.d2d_device->GetFactory(&factory);

   mswr::ComPtr<ID2D1Factory1> factory1;
   HRESULT hr = factory.As(&factory1);
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to QI for ID2D1Factory1 " << std::hex << hr;
     return hr;
   }

   ULARGE_INTEGER result;
   LARGE_INTEGER seek_pos;
   seek_pos.QuadPart = 0;
   hr = pages_[page_number]->Seek(seek_pos, STREAM_SEEK_SET, &result);
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to Seek page stream " << std::hex << hr;
     return hr;
   }

   hr = factory1->CreateGdiMetafile(pages_[page_number].Get(), gdi_metafile);
   if (FAILED(hr)) {
     LOG(ERROR) << "Failed to CreateGdiMetafile " << std::hex << hr;
     return hr;
   }
   return hr;
 }

 }  // namespace metro_driver
	// 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 "stdafx.h"
	#include "win8/metro_driver/print_document_source.h"

	#include <windows.graphics.display.h>

	#include "base/logging.h"
	#include "base/numerics/safe_conversions.h"


	namespace {

	class D2DFactoryAutoLock {
	public:
	explicit D2DFactoryAutoLock(ID2D1Factory* d2d_factory) {
	HRESULT hr = d2d_factory->QueryInterface(IID_PPV_ARGS(&d2d_multithread_));
	if (d2d_multithread_.Get())
	d2d_multithread_->Enter();
	else
	NOTREACHED() << "Failed to QI for ID2D1Multithread " << std::hex << hr;
	}

	~D2DFactoryAutoLock() {
	if (d2d_multithread_.Get())
	d2d_multithread_->Leave();
	}

	private:
	mswr::ComPtr<ID2D1Multithread> d2d_multithread_;
	};

	// TODO(mad): remove once we don't run mixed SDK/OS anymore.
	const GUID kOldPackageTargetGuid =
	{0xfb2a33c0, 0x8c35, 0x465f,
	{0xbe, 0xd5, 0x9f, 0x36, 0x89, 0x51, 0x77, 0x52}};
	const GUID kNewPackageTargetGuid =
	{0x1a6dd0ad, 0x1e2a, 0x4e99,
	{0xa5, 0xba, 0x91, 0xf1, 0x78, 0x18, 0x29, 0x0e}};


	} // namespace

	namespace metro_driver {

	PrintDocumentSource::PrintDocumentSource()
	: page_count_ready_(true, false),
	parent_lock_(NULL),
	height_(0),
	width_(0),
	dpi_(96),
	aborted_(false),
	using_old_preview_interface_(false) {
	}

	HRESULT PrintDocumentSource::RuntimeClassInitialize(
	const DirectXContext& directx_context,
	base::Lock* parent_lock) {
	DCHECK(parent_lock != NULL);
	DCHECK(directx_context.d2d_context.Get() != NULL);
	DCHECK(directx_context.d2d_device.Get() != NULL);
	DCHECK(directx_context.d2d_factory.Get() != NULL);
	DCHECK(directx_context.d3d_device.Get() != NULL);
	DCHECK(directx_context.wic_factory.Get() != NULL);
	directx_context_ = directx_context;

	// No other method can be called before RuntimeClassInitialize which is called
	// during the construction via mswr::MakeAndInitialize(), so it's safe for all
	// other methods to use the parent_lock_ without checking if it's NULL.
	DCHECK(parent_lock_ == NULL);
	parent_lock_ = parent_lock;

	return S_OK;
	}

	void PrintDocumentSource::Abort() {
	base::AutoLock lock(*parent_lock_);
	aborted_ = true;
	if (page_count_ready_.IsSignaled()) {
	pages_.clear();
	for (size_t i = 0; i < pages_ready_state_.size(); ++i)
	pages_ready_state_[i]->Broadcast();
	} else {
	DCHECK(pages_.empty() && pages_ready_state_.empty());
	}
	}

	STDMETHODIMP PrintDocumentSource::GetPreviewPageCollection(
	IPrintDocumentPackageTarget* package_target,
	IPrintPreviewPageCollection** page_collection) {
	DVLOG(1) << __FUNCTION__;
	DCHECK(package_target != NULL);
	DCHECK(page_collection != NULL);

	HRESULT hr = package_target->GetPackageTarget(
	__uuidof(IPrintPreviewDxgiPackageTarget),
	IID_PPV_ARGS(&dxgi_preview_target_));
	if (FAILED(hr)) {
	// TODO(mad): remove once we don't run mixed SDK/OS anymore.
	// The IID changed from one version of the SDK to another, so try the other
	// one in case we are running a build from a different SDK than the one
	// related to the OS version we are running.
	GUID package_target_uuid = kNewPackageTargetGuid;
	if (package_target_uuid == __uuidof(IPrintPreviewDxgiPackageTarget)) {
	package_target_uuid = kOldPackageTargetGuid;
	using_old_preview_interface_ = true;
	}
	hr = package_target->GetPackageTarget(package_target_uuid,
	package_target_uuid,
	&dxgi_preview_target_);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to get IPrintPreviewDXGIPackageTarget " << std::hex
	<< hr;
	return hr;
	}
	} else {
	using_old_preview_interface_ = (__uuidof(IPrintPreviewDxgiPackageTarget) ==
	kOldPackageTargetGuid);
	}

	mswr::ComPtr<IPrintPreviewPageCollection> preview_page_collection;
	mswr::ComPtr<PrintDocumentSource> print_document_source(this);
	hr = print_document_source.As(&preview_page_collection);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to get preview_page_collection " << std::hex << hr;
	return hr;
	}

	hr = preview_page_collection.CopyTo(page_collection);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to copy preview_page_collection " << std::hex << hr;
	return hr;
	}
	return hr;
	}

	STDMETHODIMP PrintDocumentSource::MakeDocument(
	IInspectable* options,
	IPrintDocumentPackageTarget* package_target) {
	DVLOG(1) << __FUNCTION__;
	DCHECK(options != NULL);
	DCHECK(package_target != NULL);

	mswr::ComPtr<wingfx::Printing::IPrintTaskOptionsCore> print_task_options;
	HRESULT hr = options->QueryInterface(
	wingfx::Printing::IID_IPrintTaskOptionsCore,
	reinterpret_cast<void**>(print_task_options.GetAddressOf()));
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to QI for IPrintTaskOptionsCore " << std::hex << hr;
	return hr;
	}

	// Use the first page's description for the whole document. Page numbers
	// are 1-based in this context.
	// TODO(mad): Check if it would be useful to use per page descriptions.
	wingfx::Printing::PrintPageDescription page_desc = {};
	hr = print_task_options->GetPageDescription(1 /* page */, &page_desc);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to GetPageDescription " << std::hex << hr;
	return hr;
	}

	D2D1_PRINT_CONTROL_PROPERTIES print_control_properties;
	if (page_desc.DpiX > page_desc.DpiY)
	print_control_properties.rasterDPI = static_cast<float>(page_desc.DpiY);
	else
	print_control_properties.rasterDPI = static_cast<float>(page_desc.DpiX);

	// Color space for vector graphics in D2D print control.
	print_control_properties.colorSpace = D2D1_COLOR_SPACE_SRGB;
	print_control_properties.fontSubset = D2D1_PRINT_FONT_SUBSET_MODE_DEFAULT;

	mswr::ComPtr<ID2D1PrintControl> print_control;
	hr = directx_context_.d2d_device->CreatePrintControl(
	directx_context_.wic_factory.Get(),
	package_target,
	print_control_properties,
	print_control.GetAddressOf());
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to CreatePrintControl " << std::hex << hr;
	return hr;
	}

	D2D1_SIZE_F page_size = D2D1::SizeF(page_desc.PageSize.Width,
	page_desc.PageSize.Height);

	// Wait for the number of pages to be available.
	// If an abort occured, we'll get 0 and won't enter the loop below.
	size_t page_count = WaitAndGetPageCount();

	mswr::ComPtr<ID2D1GdiMetafile> gdi_metafile;
	for (size_t page = 0; page < page_count; ++page) {
	gdi_metafile.Reset();
	hr = WaitAndGetPage(page, gdi_metafile.GetAddressOf());
	LOG_IF(ERROR, FAILED(hr)) << "Failed to get page's metafile " << std::hex
	<< hr;
	// S_FALSE means we got aborted.
	if (hr == S_FALSE \|\| FAILED(hr))
	break;
	hr = PrintPage(print_control.Get(), gdi_metafile.Get(), page_size);
	if (FAILED(hr))
	break;
	}

	HRESULT close_hr = print_control->Close();
	if (FAILED(close_hr) && SUCCEEDED(hr))
	return close_hr;
	else
	return hr;
	}

	STDMETHODIMP PrintDocumentSource::Paginate(uint32 page,
	IInspectable* options) {
	DVLOG(1) << __FUNCTION__ << ", page = " << page;
	DCHECK(options != NULL);
	// GetPreviewPageCollection must have been successfuly called.
	DCHECK(dxgi_preview_target_.Get() != NULL);

	// Get print settings from PrintTaskOptions for preview, such as page
	// description, which contains page size, imageable area, DPI.
	// TODO(mad): obtain other print settings in the same way, such as ColorMode,
	// NumberOfCopies, etc...
	mswr::ComPtr<wingfx::Printing::IPrintTaskOptionsCore> print_options;
	HRESULT hr = options->QueryInterface(
	wingfx::Printing::IID_IPrintTaskOptionsCore,
	reinterpret_cast<void**>(print_options.GetAddressOf()));
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to QI for IPrintTaskOptionsCore " << std::hex << hr;
	return hr;
	}

	wingfx::Printing::PrintPageDescription page_desc = {};
	hr = print_options->GetPageDescription(1 /* page */, &page_desc);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to GetPageDescription " << std::hex << hr;
	return hr;
	}

	width_ = page_desc.PageSize.Width;
	height_ = page_desc.PageSize.Height;

	hr = dxgi_preview_target_->InvalidatePreview();
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to InvalidatePreview " << std::hex << hr;
	return hr;
	}

	size_t page_count = WaitAndGetPageCount();
	// A page_count of 0 means abort...
	if (page_count == 0)
	return S_FALSE;
	hr = dxgi_preview_target_->SetJobPageCount(
	PageCountType::FinalPageCount,
	base::checked_cast<UINT32>(page_count));
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to SetJobPageCount " << std::hex << hr;
	return hr;
	}
	return hr;
	}

	STDMETHODIMP PrintDocumentSource::MakePage(uint32 job_page,
	float width,
	float height) {
	DVLOG(1) << __FUNCTION__ << ", width: " << width << ", height: " << height
	<< ", job_page: " << job_page;
	DCHECK(width > 0 && height > 0);
	// Paginate must have been called before this.
	if (width_ <= 0.0 \|\| height_ <= 0.0)
	return S_FALSE;

	// When job_page is JOB_PAGE_APPLICATION_DEFINED, it means a new preview
	// begins. TODO(mad): Double check if we need to cancel pending resources.
	if (job_page == JOB_PAGE_APPLICATION_DEFINED)
	job_page = 1;

	winfoundtn::Size preview_size;
	preview_size.Width = width;
	preview_size.Height = height;
	float scale = width_ / width;

	mswr::ComPtr<ID2D1Factory> factory;
	directx_context_.d2d_device->GetFactory(&factory);

	mswr::ComPtr<ID2D1GdiMetafile> gdi_metafile;
	HRESULT hr = WaitAndGetPage(job_page - 1, gdi_metafile.GetAddressOf());
	LOG_IF(ERROR, FAILED(hr)) << "Failed to get page's metafile " << std::hex
	<< hr;
	// Again, S_FALSE means we got aborted.
	if (hr == S_FALSE \|\| FAILED(hr))
	return hr;

	// We are accessing D3D resources directly without D2D's knowledge, so we
	// must manually acquire the D2D factory lock.
	D2DFactoryAutoLock factory_lock(directx_context_.d2d_factory.Get());

	CD3D11_TEXTURE2D_DESC texture_desc(
	DXGI_FORMAT_B8G8R8A8_UNORM,
	static_cast<UINT32>(ceil(width * dpi_ / 96)),
	static_cast<UINT32>(ceil(height * dpi_ / 96)),
	1,
	1,
	D3D11_BIND_RENDER_TARGET \| D3D11_BIND_SHADER_RESOURCE
	);
	mswr::ComPtr<ID3D11Texture2D> texture;
	hr = directx_context_.d3d_device->CreateTexture2D(
	&texture_desc, NULL, &texture);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to create a 2D texture " << std::hex << hr;
	return hr;
	}

	mswr::ComPtr<IDXGISurface> dxgi_surface;
	hr = texture.As<IDXGISurface>(&dxgi_surface);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to QI for IDXGISurface " << std::hex << hr;
	return hr;
	}

	// D2D device contexts are stateful, and hence a unique device context must
	// be used on each call.
	mswr::ComPtr<ID2D1DeviceContext> d2d_context;
	hr = directx_context_.d2d_device->CreateDeviceContext(
	D2D1_DEVICE_CONTEXT_OPTIONS_NONE, &d2d_context);

	d2d_context->SetDpi(dpi_, dpi_);

	mswr::ComPtr<ID2D1Bitmap1> d2dSurfaceBitmap;
	hr = d2d_context->CreateBitmapFromDxgiSurface(dxgi_surface.Get(),
	NULL, // default properties.
	&d2dSurfaceBitmap);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to CreateBitmapFromDxgiSurface " << std::hex << hr;
	return hr;
	}

	d2d_context->SetTarget(d2dSurfaceBitmap.Get());
	d2d_context->BeginDraw();
	d2d_context->Clear();
	d2d_context->SetTransform(D2D1::Matrix3x2F(1/scale, 0, 0, 1/scale, 0, 0));
	d2d_context->DrawGdiMetafile(gdi_metafile.Get());

	hr = d2d_context->EndDraw();
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to EndDraw " << std::hex << hr;
	return hr;
	}

	// TODO(mad): remove once we don't run mixed SDK/OS anymore.
	#ifdef __IPrintPreviewDxgiPackageTarget_FWD_DEFINED__
	FLOAT dpi = dpi_;
	if (using_old_preview_interface_) {
	// We compiled with the new API but run on the old OS, so we must cheat
	// and send something that looks like a float but has a UINT32 value.
	reinterpret_cast<UINT32>(&dpi) = static_cast<UINT32>(dpi_);
	}
	#else
	UINT32 dpi = static_cast<UINT32>(dpi_);
	if (!using_old_preview_interface_) {
	// We compiled with the old API but run on the new OS, so we must cheat
	// and send something that looks like a UINT32 but has a float value.
	reinterpret_cast<FLOAT>(&dpi) = dpi_;
	}
	#endif // __IPrintPreviewDxgiPackageTarget_FWD_DEFINED__
	hr = dxgi_preview_target_->DrawPage(job_page, dxgi_surface.Get(), dpi, dpi);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to DrawPage " << std::hex << hr;
	return hr;
	}
	return hr;
	}

	void PrintDocumentSource::ResetDpi(float dpi) {
	{
	base::AutoLock lock(*parent_lock_);
	if (dpi == dpi_)
	return;
	dpi_ = dpi;
	}
	directx_context_.d2d_context->SetDpi(dpi, dpi);
	}

	void PrintDocumentSource::SetPageCount(size_t page_count) {
	DCHECK(page_count > 0);
	{
	base::AutoLock lock(*parent_lock_);
	DCHECK(!page_count_ready_.IsSignaled());
	DCHECK(pages_.empty() && pages_ready_state_.empty());

	pages_.resize(page_count);
	pages_ready_state_.resize(page_count);

	for (size_t i = 0; i < page_count; ++i)
	pages_ready_state_[i] = new base::ConditionVariable(parent_lock_);
	}
	page_count_ready_.Signal();
	}

	void PrintDocumentSource::AddPage(size_t page_number,
	IStream* metafile_stream) {
	DCHECK(metafile_stream != NULL);
	base::AutoLock lock(*parent_lock_);

	DCHECK(page_count_ready_.IsSignaled());
	DCHECK(page_number < pages_.size());

	pages_[page_number] = metafile_stream;
	pages_ready_state_[page_number]->Signal();
	}

	HRESULT PrintDocumentSource::PrintPage(ID2D1PrintControl* print_control,
	ID2D1GdiMetafile* gdi_metafile,
	D2D1_SIZE_F page_size) {
	DVLOG(1) << __FUNCTION__ << ", page_size: (" << page_size.width << ", "
	<< page_size.height << ")";
	DCHECK(print_control != NULL);
	DCHECK(gdi_metafile != NULL);

	// D2D device contexts are stateful, and hence a unique device context must
	// be used on each call.
	mswr::ComPtr<ID2D1DeviceContext> d2d_context;
	HRESULT hr = directx_context_.d2d_device->CreateDeviceContext(
	D2D1_DEVICE_CONTEXT_OPTIONS_NONE, &d2d_context);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to CreateDeviceContext " << std::hex << hr;
	return hr;
	}

	mswr::ComPtr<ID2D1CommandList> print_command_list;
	hr = d2d_context->CreateCommandList(&print_command_list);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to CreateCommandList " << std::hex << hr;
	return hr;
	}

	d2d_context->SetTarget(print_command_list.Get());

	d2d_context->BeginDraw();
	d2d_context->DrawGdiMetafile(gdi_metafile);
	hr = d2d_context->EndDraw();
	LOG_IF(ERROR, FAILED(hr)) << "Failed to EndDraw " << std::hex << hr;

	// Make sure to always close the command list.
	HRESULT close_hr = print_command_list->Close();
	LOG_IF(ERROR, FAILED(close_hr)) << "Failed to close command list " << std::hex
	<< hr;
	if (SUCCEEDED(hr) && SUCCEEDED(close_hr))
	hr = print_control->AddPage(print_command_list.Get(), page_size, NULL);
	if (FAILED(hr))
	return hr;
	else
	return close_hr;
	}

	size_t PrintDocumentSource::WaitAndGetPageCount() {
	// Properly protect the wait/access to the page count.
	{
	base::AutoLock lock(*parent_lock_);
	if (aborted_)
	return 0;
	DCHECK(pages_.size() == pages_ready_state_.size());
	if (!pages_.empty())
	return pages_.size();
	}
	page_count_ready_.Wait();
	{
	base::AutoLock lock(*parent_lock_);
	if (!aborted_) {
	DCHECK(pages_.size() == pages_ready_state_.size());
	return pages_.size();
	}
	}
	// A page count of 0 means abort.
	return 0;
	}

	HRESULT PrintDocumentSource::WaitAndGetPage(size_t page_number,
	ID2D1GdiMetafile** gdi_metafile) {
	// Properly protect the wait/access to the page data.
	base::AutoLock lock(*parent_lock_);
	// Make sure we weren't canceled before getting here.
	// And the page count should have been received before we get here too.
	if (aborted_)
	return S_FALSE;

	// We shouldn't be asked for a page until we got the page count.
	DCHECK(page_count_ready_.IsSignaled());
	DCHECK(page_number <= pages_ready_state_.size());
	DCHECK(pages_.size() == pages_ready_state_.size());
	while (!aborted_ && pages_[page_number].Get() == NULL)
	pages_ready_state_[page_number]->Wait();

	// Make sure we weren't aborted while we waited unlocked.
	if (aborted_)
	return S_FALSE;
	DCHECK(page_number < pages_.size());

	mswr::ComPtr<ID2D1Factory> factory;
	directx_context_.d2d_device->GetFactory(&factory);

	mswr::ComPtr<ID2D1Factory1> factory1;
	HRESULT hr = factory.As(&factory1);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to QI for ID2D1Factory1 " << std::hex << hr;
	return hr;
	}

	ULARGE_INTEGER result;
	LARGE_INTEGER seek_pos;
	seek_pos.QuadPart = 0;
	hr = pages_[page_number]->Seek(seek_pos, STREAM_SEEK_SET, &result);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to Seek page stream " << std::hex << hr;
	return hr;
	}

	hr = factory1->CreateGdiMetafile(pages_[page_number].Get(), gdi_metafile);
	if (FAILED(hr)) {
	LOG(ERROR) << "Failed to CreateGdiMetafile " << std::hex << hr;
	return hr;
	}
	return hr;
	}

	} // namespace metro_driver