printing/emf_win.cc - chromium/src - 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 "printing/emf_win.h"

 #include <stdint.h>

 #include <algorithm>
 #include <memory>

 #include "base/check_op.h"
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/notreached.h"
 #include "base/numerics/safe_conversions.h"
 #include "skia/ext/skia_utils_win.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/gfx/codec/jpeg_codec.h"
 #include "ui/gfx/codec/png_codec.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/size.h"

 namespace printing {

 namespace {

 bool DIBFormatNativelySupported(HDC dc,
                                 uint32_t escape,
                                 const BYTE* bits,
                                 int size) {
   BOOL supported = FALSE;
   if (ExtEscape(dc, QUERYESCSUPPORT, sizeof(escape),
                 reinterpret_cast<LPCSTR>(&escape), 0, 0) > 0) {
     ExtEscape(dc, escape, size, reinterpret_cast<LPCSTR>(bits),
               sizeof(supported), reinterpret_cast<LPSTR>(&supported));
   }
   return !!supported;
 }

 }  // namespace

 Emf::Emf() : emf_(nullptr), hdc_(nullptr) {}

 Emf::~Emf() {
   Close();
 }

 void Emf::Close() {
   DCHECK(!hdc_);
   if (emf_)
     DeleteEnhMetaFile(emf_);
   emf_ = nullptr;
 }

 bool Emf::InitToFile(const base::FilePath& metafile_path) {
   DCHECK(!emf_ && !hdc_);
   hdc_ = CreateEnhMetaFile(nullptr, metafile_path.value().c_str(), nullptr,
                            nullptr);
   DCHECK(hdc_);
   return !!hdc_;
 }

 bool Emf::InitFromFile(const base::FilePath& metafile_path) {
   DCHECK(!emf_ && !hdc_);
   emf_ = GetEnhMetaFile(metafile_path.value().c_str());
   DCHECK(emf_);
   return !!emf_;
 }

 bool Emf::Init() {
   DCHECK(!emf_ && !hdc_);
   hdc_ = CreateEnhMetaFile(nullptr, nullptr, nullptr, nullptr);
   DCHECK(hdc_);
   return !!hdc_;
 }

 bool Emf::InitFromData(base::span<const uint8_t> data) {
   DCHECK(!emf_ && !hdc_);
   if (!base::IsValueInRangeForNumericType<UINT>(data.size()))
     return false;

   emf_ = SetEnhMetaFileBits(static_cast<UINT>(data.size()), data.data());
   return !!emf_;
 }

 bool Emf::FinishDocument() {
   DCHECK(!emf_ && hdc_);
   emf_ = CloseEnhMetaFile(hdc_);
   DCHECK(emf_);
   hdc_ = nullptr;
   return !!emf_;
 }

 bool Emf::Playback(HDC hdc, const RECT* rect) const {
   DCHECK(emf_ && !hdc_);
   RECT bounds;
   if (!rect) {
     // Get the natural bounds of the EMF buffer.
     bounds = GetPageBounds(1).ToRECT();
     rect = &bounds;
   }
   return PlayEnhMetaFile(hdc, emf_, rect) != 0;
 }

 bool Emf::SafePlayback(HDC context) const {
   DCHECK(emf_ && !hdc_);
   XFORM base_matrix;
   if (!GetWorldTransform(context, &base_matrix)) {
     NOTREACHED();
     return false;
   }
   Emf::EnumerationContext playback_context;
   playback_context.base_matrix = &base_matrix;
   gfx::Rect bound = GetPageBounds(1);
   RECT rect = bound.ToRECT();
   return bound.IsEmpty() ||
          EnumEnhMetaFile(context, emf_, &Emf::SafePlaybackProc,
                          reinterpret_cast<void*>(&playback_context),
                          &rect) != 0;
 }

 gfx::Rect Emf::GetPageBounds(unsigned int page_number) const {
   DCHECK(emf_ && !hdc_);
   DCHECK_EQ(1U, page_number);
   ENHMETAHEADER header;
   if (GetEnhMetaFileHeader(emf_, sizeof(header), &header) != sizeof(header)) {
     NOTREACHED();
     return gfx::Rect();
   }
   // Add 1 to right and bottom because it's inclusive rectangle.
   // See ENHMETAHEADER.
   return gfx::Rect(header.rclBounds.left, header.rclBounds.top,
                    header.rclBounds.right - header.rclBounds.left + 1,
                    header.rclBounds.bottom - header.rclBounds.top + 1);
 }

 unsigned int Emf::GetPageCount() const {
   return 1;
 }

 HDC Emf::context() const {
   return hdc_;
 }

 uint32_t Emf::GetDataSize() const {
   DCHECK(emf_ && !hdc_);
   return GetEnhMetaFileBits(emf_, 0, nullptr);
 }

 bool Emf::GetData(void* buffer, uint32_t size) const {
   DCHECK(emf_ && !hdc_);
   DCHECK(buffer && size);
   uint32_t size2 =
       GetEnhMetaFileBits(emf_, size, reinterpret_cast<BYTE*>(buffer));
   DCHECK(size2 == size);
   return size2 == size && size2 != 0;
 }

 int CALLBACK Emf::SafePlaybackProc(HDC hdc,
                                    HANDLETABLE* handle_table,
                                    const ENHMETARECORD* record,
                                    int objects_count,
                                    LPARAM param) {
   Emf::EnumerationContext* context =
       reinterpret_cast<Emf::EnumerationContext*>(param);
   context->handle_table = handle_table;
   context->objects_count = objects_count;
   context->hdc = hdc;
   Record record_instance(record);
   bool success = record_instance.SafePlayback(context);
   DCHECK(success);
   return 1;
 }

 Emf::EnumerationContext::EnumerationContext() {
   memset(this, 0, sizeof(*this));
 }

 Emf::Record::Record(const ENHMETARECORD* record) : record_(record) {
   DCHECK(record_);
 }

 bool Emf::Record::Play(Emf::EnumerationContext* context) const {
   return 0 != PlayEnhMetaFileRecord(context->hdc, context->handle_table,
                                     record_, context->objects_count);
 }

 bool Emf::Record::SafePlayback(Emf::EnumerationContext* context) const {
   // For EMF field description, see [MS-EMF] Enhanced Metafile Format
   // Specification.
   //
   // This is the second major EMF breakage I get; the first one being
   // SetDCBrushColor/SetDCPenColor/DC_PEN/DC_BRUSH being silently ignored.
   //
   // This function is the guts of the fix for bug 1186598. Some printer drivers
   // somehow choke on certain EMF records, but calling the corresponding
   // function directly on the printer HDC is fine. Still, playing the EMF record
   // fails. Go figure.
   //
   // The main issue is that SetLayout is totally unsupported on these printers
   // (HP 4500/4700). I used to call SetLayout and I stopped. I found out this is
   // not sufficient because GDI32!PlayEnhMetaFile internally calls SetLayout(!)
   // Damn.
   //
   // So I resorted to manually parse the EMF records and play them one by one.
   // The issue with this method compared to using PlayEnhMetaFile to play back
   // an EMF buffer is that the later silently fixes the matrix to take in
   // account the matrix currently loaded at the time of the call.
   // The matrix magic is done transparently when using PlayEnhMetaFile but since
   // I'm processing one field at a time, I need to do the fixup myself. Note
   // that PlayEnhMetaFileRecord doesn't fix the matrix correctly even when
   // called inside an EnumEnhMetaFile loop. Go figure (bis).
   //
   // So when I see a EMR_SETWORLDTRANSFORM and EMR_MODIFYWORLDTRANSFORM, I need
   // to fix the matrix according to the matrix previously loaded before playing
   // back the buffer. Otherwise, the previously loaded matrix would be ignored
   // and the EMF buffer would always be played back at its native resolution.
   // Duh.
   //
   // I also use this opportunity to skip over eventual EMR_SETLAYOUT record that
   // could remain.
   //
   // Another tweak we make is for JPEGs/PNGs in calls to StretchDIBits.
   // (Our Pepper plugin code uses a JPEG). If the printer does not support
   // JPEGs/PNGs natively we decompress the JPEG/PNG and then set it to the
   // device.
   // TODO(sanjeevr): We should also add JPEG/PNG support for SetSIBitsToDevice
   //
   // We also process any custom EMR_GDICOMMENT records which are our
   // placeholders for StartPage and EndPage.
   // Note: I should probably care about view ports and clipping, eventually.
   bool res = false;
   const XFORM* base_matrix = context->base_matrix;
   switch (record()->iType) {
     case EMR_STRETCHDIBITS: {
       const EMRSTRETCHDIBITS* sdib_record =
           reinterpret_cast<const EMRSTRETCHDIBITS*>(record());
       const BYTE* record_start = reinterpret_cast<const BYTE*>(record());
       const BITMAPINFOHEADER* bmih = reinterpret_cast<const BITMAPINFOHEADER*>(
           record_start + sdib_record->offBmiSrc);
       const BYTE* bits = record_start + sdib_record->offBitsSrc;
       bool play_normally = true;
       res = false;
       HDC hdc = context->hdc;
       std::unique_ptr<SkBitmap> bitmap;
       if (bmih->biCompression == BI_JPEG) {
         if (!DIBFormatNativelySupported(hdc, CHECKJPEGFORMAT, bits,
                                         bmih->biSizeImage)) {
           play_normally = false;
           bitmap = gfx::JPEGCodec::Decode(bits, bmih->biSizeImage);
           DCHECK(bitmap);
           DCHECK(!bitmap->isNull());
         }
       } else if (bmih->biCompression == BI_PNG) {
         if (!DIBFormatNativelySupported(hdc, CHECKPNGFORMAT, bits,
                                         bmih->biSizeImage)) {
           play_normally = false;
           bitmap = std::make_unique<SkBitmap>();
           bool png_ok =
               gfx::PNGCodec::Decode(bits, bmih->biSizeImage, &*bitmap);
           DCHECK(png_ok);
           DCHECK(!bitmap->isNull());
         }
       }
       if (play_normally) {
         res = Play(context);
       } else {
         const uint32_t* pixels =
             static_cast<const uint32_t*>(bitmap->getPixels());
         if (!pixels) {
           NOTREACHED();
           return false;
         }
         BITMAPINFOHEADER bmi = {0};
         skia::CreateBitmapHeaderForN32SkBitmap(*bitmap, &bmi);
         res =
             (0 != StretchDIBits(hdc, sdib_record->xDest, sdib_record->yDest,
                                 sdib_record->cxDest, sdib_record->cyDest,
                                 sdib_record->xSrc, sdib_record->ySrc,
                                 sdib_record->cxSrc, sdib_record->cySrc, pixels,
                                 reinterpret_cast<const BITMAPINFO*>(&bmi),
                                 sdib_record->iUsageSrc, sdib_record->dwRop));
       }
       break;
     }
     case EMR_SETWORLDTRANSFORM: {
       DCHECK_EQ(record()->nSize, sizeof(DWORD) * 2 + sizeof(XFORM));
       const XFORM* xform = reinterpret_cast<const XFORM*>(record()->dParm);
       HDC hdc = context->hdc;
       if (base_matrix) {
         res = 0 != SetWorldTransform(hdc, base_matrix) &&
               ModifyWorldTransform(hdc, xform, MWT_LEFTMULTIPLY);
       } else {
         res = 0 != SetWorldTransform(hdc, xform);
       }
       break;
     }
     case EMR_MODIFYWORLDTRANSFORM: {
       DCHECK_EQ(record()->nSize,
                 sizeof(DWORD) * 2 + sizeof(XFORM) + sizeof(DWORD));
       const XFORM* xform = reinterpret_cast<const XFORM*>(record()->dParm);
       const DWORD* option = reinterpret_cast<const DWORD*>(xform + 1);
       HDC hdc = context->hdc;
       switch (*option) {
         case MWT_IDENTITY:
           if (base_matrix) {
             res = 0 != SetWorldTransform(hdc, base_matrix);
           } else {
             res = 0 != ModifyWorldTransform(hdc, xform, MWT_IDENTITY);
           }
           break;
         case MWT_LEFTMULTIPLY:
         case MWT_RIGHTMULTIPLY:
           res = 0 != ModifyWorldTransform(hdc, xform, *option);
           break;
         case 4:  // MWT_SET
           if (base_matrix) {
             res = 0 != SetWorldTransform(hdc, base_matrix) &&
                   ModifyWorldTransform(hdc, xform, MWT_LEFTMULTIPLY);
           } else {
             res = 0 != SetWorldTransform(hdc, xform);
           }
           break;
         default:
           res = false;
           break;
       }
       break;
     }
     case EMR_SETLAYOUT:
       // Ignore it.
       res = true;
       break;
     default: {
       res = Play(context);
       break;
     }
   }
   return res;
 }

 void Emf::StartPage(const gfx::Size& /*page_size*/,
                     const gfx::Rect& /*content_area*/,
                     float /*scale_factor*/,
                     mojom::PageOrientation /*page_orientation*/) {}

 bool Emf::FinishPage() {
   return true;
 }

 Emf::Enumerator::Enumerator(const Emf& emf, HDC context, const RECT* rect) {
   items_.clear();
   if (!EnumEnhMetaFile(context, emf.emf(), &Emf::Enumerator::EnhMetaFileProc,
                        reinterpret_cast<void*>(this), rect)) {
     NOTREACHED();
     items_.clear();
   }
   DCHECK_EQ(context_.hdc, context);
 }

 Emf::Enumerator::~Enumerator() {}

 Emf::Enumerator::const_iterator Emf::Enumerator::begin() const {
   return items_.begin();
 }

 Emf::Enumerator::const_iterator Emf::Enumerator::end() const {
   return items_.end();
 }

 int CALLBACK Emf::Enumerator::EnhMetaFileProc(HDC hdc,
                                               HANDLETABLE* handle_table,
                                               const ENHMETARECORD* record,
                                               int objects_count,
                                               LPARAM param) {
   Enumerator& emf = *reinterpret_cast<Enumerator*>(param);
   if (!emf.context_.handle_table) {
     DCHECK(!emf.context_.handle_table);
     DCHECK(!emf.context_.objects_count);
     emf.context_.handle_table = handle_table;
     emf.context_.objects_count = objects_count;
     emf.context_.hdc = hdc;
   } else {
     DCHECK_EQ(emf.context_.handle_table, handle_table);
     DCHECK_EQ(emf.context_.objects_count, objects_count);
     DCHECK_EQ(emf.context_.hdc, hdc);
   }
   emf.items_.push_back(Record(record));
   return 1;
 }

 }  // namespace printing
	// 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 "printing/emf_win.h"

	#include <stdint.h>

	#include <algorithm>
	#include <memory>

	#include "base/check_op.h"
	#include "base/files/file.h"
	#include "base/files/file_path.h"
	#include "base/notreached.h"
	#include "base/numerics/safe_conversions.h"
	#include "skia/ext/skia_utils_win.h"
	#include "third_party/skia/include/core/SkBitmap.h"
	#include "ui/gfx/codec/jpeg_codec.h"
	#include "ui/gfx/codec/png_codec.h"
	#include "ui/gfx/geometry/rect.h"
	#include "ui/gfx/geometry/size.h"

	namespace printing {

	namespace {

	bool DIBFormatNativelySupported(HDC dc,
	uint32_t escape,
	const BYTE* bits,
	int size) {
	BOOL supported = FALSE;
	if (ExtEscape(dc, QUERYESCSUPPORT, sizeof(escape),
	reinterpret_cast<LPCSTR>(&escape), 0, 0) > 0) {
	ExtEscape(dc, escape, size, reinterpret_cast<LPCSTR>(bits),
	sizeof(supported), reinterpret_cast<LPSTR>(&supported));
	}
	return !!supported;
	}

	} // namespace

	Emf::Emf() : emf_(nullptr), hdc_(nullptr) {}

	Emf::~Emf() {
	Close();
	}

	void Emf::Close() {
	DCHECK(!hdc_);
	if (emf_)
	DeleteEnhMetaFile(emf_);
	emf_ = nullptr;
	}

	bool Emf::InitToFile(const base::FilePath& metafile_path) {
	DCHECK(!emf_ && !hdc_);
	hdc_ = CreateEnhMetaFile(nullptr, metafile_path.value().c_str(), nullptr,
	nullptr);
	DCHECK(hdc_);
	return !!hdc_;
	}

	bool Emf::InitFromFile(const base::FilePath& metafile_path) {
	DCHECK(!emf_ && !hdc_);
	emf_ = GetEnhMetaFile(metafile_path.value().c_str());
	DCHECK(emf_);
	return !!emf_;
	}

	bool Emf::Init() {
	DCHECK(!emf_ && !hdc_);
	hdc_ = CreateEnhMetaFile(nullptr, nullptr, nullptr, nullptr);
	DCHECK(hdc_);
	return !!hdc_;
	}

	bool Emf::InitFromData(base::span<const uint8_t> data) {
	DCHECK(!emf_ && !hdc_);
	if (!base::IsValueInRangeForNumericType<UINT>(data.size()))
	return false;

	emf_ = SetEnhMetaFileBits(static_cast<UINT>(data.size()), data.data());
	return !!emf_;
	}

	bool Emf::FinishDocument() {
	DCHECK(!emf_ && hdc_);
	emf_ = CloseEnhMetaFile(hdc_);
	DCHECK(emf_);
	hdc_ = nullptr;
	return !!emf_;
	}

	bool Emf::Playback(HDC hdc, const RECT* rect) const {
	DCHECK(emf_ && !hdc_);
	RECT bounds;
	if (!rect) {
	// Get the natural bounds of the EMF buffer.
	bounds = GetPageBounds(1).ToRECT();
	rect = &bounds;
	}
	return PlayEnhMetaFile(hdc, emf_, rect) != 0;
	}

	bool Emf::SafePlayback(HDC context) const {
	DCHECK(emf_ && !hdc_);
	XFORM base_matrix;
	if (!GetWorldTransform(context, &base_matrix)) {
	NOTREACHED();
	return false;
	}
	Emf::EnumerationContext playback_context;
	playback_context.base_matrix = &base_matrix;
	gfx::Rect bound = GetPageBounds(1);
	RECT rect = bound.ToRECT();
	return bound.IsEmpty() \|\|
	EnumEnhMetaFile(context, emf_, &Emf::SafePlaybackProc,
	reinterpret_cast<void*>(&playback_context),
	&rect) != 0;
	}

	gfx::Rect Emf::GetPageBounds(unsigned int page_number) const {
	DCHECK(emf_ && !hdc_);
	DCHECK_EQ(1U, page_number);
	ENHMETAHEADER header;
	if (GetEnhMetaFileHeader(emf_, sizeof(header), &header) != sizeof(header)) {
	NOTREACHED();
	return gfx::Rect();
	}
	// Add 1 to right and bottom because it's inclusive rectangle.
	// See ENHMETAHEADER.
	return gfx::Rect(header.rclBounds.left, header.rclBounds.top,
	header.rclBounds.right - header.rclBounds.left + 1,
	header.rclBounds.bottom - header.rclBounds.top + 1);
	}

	unsigned int Emf::GetPageCount() const {
	return 1;
	}

	HDC Emf::context() const {
	return hdc_;
	}

	uint32_t Emf::GetDataSize() const {
	DCHECK(emf_ && !hdc_);
	return GetEnhMetaFileBits(emf_, 0, nullptr);
	}

	bool Emf::GetData(void* buffer, uint32_t size) const {
	DCHECK(emf_ && !hdc_);
	DCHECK(buffer && size);
	uint32_t size2 =
	GetEnhMetaFileBits(emf_, size, reinterpret_cast<BYTE*>(buffer));
	DCHECK(size2 == size);
	return size2 == size && size2 != 0;
	}

	int CALLBACK Emf::SafePlaybackProc(HDC hdc,
	HANDLETABLE* handle_table,
	const ENHMETARECORD* record,
	int objects_count,
	LPARAM param) {
	Emf::EnumerationContext* context =
	reinterpret_cast<Emf::EnumerationContext*>(param);
	context->handle_table = handle_table;
	context->objects_count = objects_count;
	context->hdc = hdc;
	Record record_instance(record);
	bool success = record_instance.SafePlayback(context);
	DCHECK(success);
	return 1;
	}

	Emf::EnumerationContext::EnumerationContext() {
	memset(this, 0, sizeof(*this));
	}

	Emf::Record::Record(const ENHMETARECORD* record) : record_(record) {
	DCHECK(record_);
	}

	bool Emf::Record::Play(Emf::EnumerationContext* context) const {
	return 0 != PlayEnhMetaFileRecord(context->hdc, context->handle_table,
	record_, context->objects_count);
	}

	bool Emf::Record::SafePlayback(Emf::EnumerationContext* context) const {
	// For EMF field description, see [MS-EMF] Enhanced Metafile Format
	// Specification.
	//
	// This is the second major EMF breakage I get; the first one being
	// SetDCBrushColor/SetDCPenColor/DC_PEN/DC_BRUSH being silently ignored.
	//
	// This function is the guts of the fix for bug 1186598. Some printer drivers
	// somehow choke on certain EMF records, but calling the corresponding
	// function directly on the printer HDC is fine. Still, playing the EMF record
	// fails. Go figure.
	//
	// The main issue is that SetLayout is totally unsupported on these printers
	// (HP 4500/4700). I used to call SetLayout and I stopped. I found out this is
	// not sufficient because GDI32!PlayEnhMetaFile internally calls SetLayout(!)
	// Damn.
	//
	// So I resorted to manually parse the EMF records and play them one by one.
	// The issue with this method compared to using PlayEnhMetaFile to play back
	// an EMF buffer is that the later silently fixes the matrix to take in
	// account the matrix currently loaded at the time of the call.
	// The matrix magic is done transparently when using PlayEnhMetaFile but since
	// I'm processing one field at a time, I need to do the fixup myself. Note
	// that PlayEnhMetaFileRecord doesn't fix the matrix correctly even when
	// called inside an EnumEnhMetaFile loop. Go figure (bis).
	//
	// So when I see a EMR_SETWORLDTRANSFORM and EMR_MODIFYWORLDTRANSFORM, I need
	// to fix the matrix according to the matrix previously loaded before playing
	// back the buffer. Otherwise, the previously loaded matrix would be ignored
	// and the EMF buffer would always be played back at its native resolution.
	// Duh.
	//
	// I also use this opportunity to skip over eventual EMR_SETLAYOUT record that
	// could remain.
	//
	// Another tweak we make is for JPEGs/PNGs in calls to StretchDIBits.
	// (Our Pepper plugin code uses a JPEG). If the printer does not support
	// JPEGs/PNGs natively we decompress the JPEG/PNG and then set it to the
	// device.
	// TODO(sanjeevr): We should also add JPEG/PNG support for SetSIBitsToDevice
	//
	// We also process any custom EMR_GDICOMMENT records which are our
	// placeholders for StartPage and EndPage.
	// Note: I should probably care about view ports and clipping, eventually.
	bool res = false;
	const XFORM* base_matrix = context->base_matrix;
	switch (record()->iType) {
	case EMR_STRETCHDIBITS: {
	const EMRSTRETCHDIBITS* sdib_record =
	reinterpret_cast<const EMRSTRETCHDIBITS*>(record());
	const BYTE* record_start = reinterpret_cast<const BYTE*>(record());
	const BITMAPINFOHEADER* bmih = reinterpret_cast<const BITMAPINFOHEADER*>(
	record_start + sdib_record->offBmiSrc);
	const BYTE* bits = record_start + sdib_record->offBitsSrc;
	bool play_normally = true;
	res = false;
	HDC hdc = context->hdc;
	std::unique_ptr<SkBitmap> bitmap;
	if (bmih->biCompression == BI_JPEG) {
	if (!DIBFormatNativelySupported(hdc, CHECKJPEGFORMAT, bits,
	bmih->biSizeImage)) {
	play_normally = false;
	bitmap = gfx::JPEGCodec::Decode(bits, bmih->biSizeImage);
	DCHECK(bitmap);
	DCHECK(!bitmap->isNull());
	}
	} else if (bmih->biCompression == BI_PNG) {
	if (!DIBFormatNativelySupported(hdc, CHECKPNGFORMAT, bits,
	bmih->biSizeImage)) {
	play_normally = false;
	bitmap = std::make_unique<SkBitmap>();
	bool png_ok =
	gfx::PNGCodec::Decode(bits, bmih->biSizeImage, &*bitmap);
	DCHECK(png_ok);
	DCHECK(!bitmap->isNull());
	}
	}
	if (play_normally) {
	res = Play(context);
	} else {
	const uint32_t* pixels =
	static_cast<const uint32_t*>(bitmap->getPixels());
	if (!pixels) {
	NOTREACHED();
	return false;
	}
	BITMAPINFOHEADER bmi = {0};
	skia::CreateBitmapHeaderForN32SkBitmap(*bitmap, &bmi);
	res =
	(0 != StretchDIBits(hdc, sdib_record->xDest, sdib_record->yDest,
	sdib_record->cxDest, sdib_record->cyDest,
	sdib_record->xSrc, sdib_record->ySrc,
	sdib_record->cxSrc, sdib_record->cySrc, pixels,
	reinterpret_cast<const BITMAPINFO*>(&bmi),
	sdib_record->iUsageSrc, sdib_record->dwRop));
	}
	break;
	}
	case EMR_SETWORLDTRANSFORM: {
	DCHECK_EQ(record()->nSize, sizeof(DWORD) * 2 + sizeof(XFORM));
	const XFORM* xform = reinterpret_cast<const XFORM*>(record()->dParm);
	HDC hdc = context->hdc;
	if (base_matrix) {
	res = 0 != SetWorldTransform(hdc, base_matrix) &&
	ModifyWorldTransform(hdc, xform, MWT_LEFTMULTIPLY);
	} else {
	res = 0 != SetWorldTransform(hdc, xform);
	}
	break;
	}
	case EMR_MODIFYWORLDTRANSFORM: {
	DCHECK_EQ(record()->nSize,
	sizeof(DWORD) * 2 + sizeof(XFORM) + sizeof(DWORD));
	const XFORM* xform = reinterpret_cast<const XFORM*>(record()->dParm);
	const DWORD* option = reinterpret_cast<const DWORD*>(xform + 1);
	HDC hdc = context->hdc;
	switch (*option) {
	case MWT_IDENTITY:
	if (base_matrix) {
	res = 0 != SetWorldTransform(hdc, base_matrix);
	} else {
	res = 0 != ModifyWorldTransform(hdc, xform, MWT_IDENTITY);
	}
	break;
	case MWT_LEFTMULTIPLY:
	case MWT_RIGHTMULTIPLY:
	res = 0 != ModifyWorldTransform(hdc, xform, *option);
	break;
	case 4: // MWT_SET
	if (base_matrix) {
	res = 0 != SetWorldTransform(hdc, base_matrix) &&
	ModifyWorldTransform(hdc, xform, MWT_LEFTMULTIPLY);
	} else {
	res = 0 != SetWorldTransform(hdc, xform);
	}
	break;
	default:
	res = false;
	break;
	}
	break;
	}
	case EMR_SETLAYOUT:
	// Ignore it.
	res = true;
	break;
	default: {
	res = Play(context);
	break;
	}
	}
	return res;
	}

	void Emf::StartPage(const gfx::Size& /page_size/,
	const gfx::Rect& /content_area/,
	float /scale_factor/,
	mojom::PageOrientation /page_orientation/) {}

	bool Emf::FinishPage() {
	return true;
	}

	Emf::Enumerator::Enumerator(const Emf& emf, HDC context, const RECT* rect) {
	items_.clear();
	if (!EnumEnhMetaFile(context, emf.emf(), &Emf::Enumerator::EnhMetaFileProc,
	reinterpret_cast<void*>(this), rect)) {
	NOTREACHED();
	items_.clear();
	}
	DCHECK_EQ(context_.hdc, context);
	}

	Emf::Enumerator::~Enumerator() {}

	Emf::Enumerator::const_iterator Emf::Enumerator::begin() const {
	return items_.begin();
	}

	Emf::Enumerator::const_iterator Emf::Enumerator::end() const {
	return items_.end();
	}

	int CALLBACK Emf::Enumerator::EnhMetaFileProc(HDC hdc,
	HANDLETABLE* handle_table,
	const ENHMETARECORD* record,
	int objects_count,
	LPARAM param) {
	Enumerator& emf = reinterpret_cast<Enumerator>(param);
	if (!emf.context_.handle_table) {
	DCHECK(!emf.context_.handle_table);
	DCHECK(!emf.context_.objects_count);
	emf.context_.handle_table = handle_table;
	emf.context_.objects_count = objects_count;
	emf.context_.hdc = hdc;
	} else {
	DCHECK_EQ(emf.context_.handle_table, handle_table);
	DCHECK_EQ(emf.context_.objects_count, objects_count);
	DCHECK_EQ(emf.context_.hdc, hdc);
	}
	emf.items_.push_back(Record(record));
	return 1;
	}

	} // namespace printing