Merge pull request #1669 from hokein/pdf-dll

Load pdf library dynamically

atom.gyp

@@ -124,7 +124,9 @@
                       '<@(libchromiumcontent_shared_v8_libraries)',
                     ],
                   }, {
-                    'copied_libraries': [],
+                    'copied_libraries': [
+                      '<(libchromiumcontent_dir)/pdf.dll',
+                    ],
                   }],
                 ],
               },

atom/app/atom_main_delegate.cc

@@ -64,6 +64,10 @@ void AtomMainDelegate::PreSandboxStartup() {
   std::string process_type = command_line->GetSwitchValueASCII(
       switches::kProcessType);
 
+  if (process_type == switches::kUtilityProcess) {
+    AtomContentUtilityClient::PreSandboxStartup();
+  }
+
   // Only append arguments for browser process.
   if (!process_type.empty())
     return;

atom/utility/atom_content_utility_client.cc

@@ -17,7 +17,7 @@
 
 
 #if defined(OS_WIN)
-#include "chrome/utility/printing_handler.h"
+#include "chrome/utility/printing_handler_win.h"
 #endif
 
 
@@ -37,7 +37,7 @@ int64_t AtomContentUtilityClient::max_ipc_message_size_ =
 AtomContentUtilityClient::AtomContentUtilityClient()
     : filter_messages_(false) {
 #if defined(OS_WIN)
-  handlers_.push_back(new PrintingHandler());
+  handlers_.push_back(new PrintingHandlerWin());
 #endif
 }
 
@@ -71,4 +71,11 @@ void AtomContentUtilityClient::OnStartupPing() {
   // Don't release the process, we assume further messages are on the way.
 }
 
+// static
+void AtomContentUtilityClient::PreSandboxStartup() {
+#if defined(OS_WIN)
+  PrintingHandlerWin::PreSandboxStartup();
+#endif
+}
+
 }  // namespace atom

atom/utility/atom_content_utility_client.h

@@ -31,6 +31,7 @@ class AtomContentUtilityClient : public content::ContentUtilityClient {
   void UtilityThreadStarted() override;
   bool OnMessageReceived(const IPC::Message& message) override;
 
+  static void PreSandboxStartup();
 
   static void set_max_ipc_message_size_for_test(int64_t max_message_size) {
     max_ipc_message_size_ = max_message_size;

chromium_src/chrome/utility/printing_handler.cc

@@ -1,144 +0,0 @@
-// Copyright 2014 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 "chrome/utility/printing_handler.h"
-
-#include "base/files/file_util.h"
-#include "base/lazy_instance.h"
-#include "base/path_service.h"
-#include "base/scoped_native_library.h"
-#include "chrome/common/print_messages.h"
-#include "content/public/utility/utility_thread.h"
-#include "pdf/pdf.h"
-#include "printing/page_range.h"
-#include "printing/pdf_render_settings.h"
-
-#if defined(OS_WIN)
-#include "printing/emf_win.h"
-#include "ui/gfx/gdi_util.h"
-#endif
-
-
-namespace {
-
-bool Send(IPC::Message* message) {
-  return content::UtilityThread::Get()->Send(message);
-}
-
-void ReleaseProcessIfNeeded() {
-  content::UtilityThread::Get()->ReleaseProcessIfNeeded();
-}
-
-}  // namespace
-
-PrintingHandler::PrintingHandler() {}
-
-PrintingHandler::~PrintingHandler() {}
-
-bool PrintingHandler::OnMessageReceived(const IPC::Message& message) {
-  bool handled = true;
-  IPC_BEGIN_MESSAGE_MAP(PrintingHandler, message)
-#if defined(OS_WIN)
-    IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToMetafiles,
-                        OnRenderPDFPagesToMetafile)
-    IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToMetafiles_GetPage,
-                        OnRenderPDFPagesToMetafileGetPage)
-    IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToMetafiles_Stop,
-                        OnRenderPDFPagesToMetafileStop)
-#endif  // OS_WIN
-    IPC_MESSAGE_UNHANDLED(handled = false)
-  IPC_END_MESSAGE_MAP()
-  return handled;
-}
-
-#if defined(OS_WIN)
-void PrintingHandler::OnRenderPDFPagesToMetafile(
-    IPC::PlatformFileForTransit pdf_transit,
-    const printing::PdfRenderSettings& settings) {
-  pdf_rendering_settings_ = settings;
-  base::File pdf_file = IPC::PlatformFileForTransitToFile(pdf_transit);
-  int page_count = LoadPDF(pdf_file.Pass());
-  //int page_count = 1;
-  Send(
-      new ChromeUtilityHostMsg_RenderPDFPagesToMetafiles_PageCount(page_count));
-}
-
-void PrintingHandler::OnRenderPDFPagesToMetafileGetPage(
-    int page_number,
-    IPC::PlatformFileForTransit output_file) {
-  base::File emf_file = IPC::PlatformFileForTransitToFile(output_file);
-  float scale_factor = 1.0f;
-  bool success =
-      RenderPdfPageToMetafile(page_number, emf_file.Pass(), &scale_factor);
-  Send(new ChromeUtilityHostMsg_RenderPDFPagesToMetafiles_PageDone(
-      success, scale_factor));
-}
-
-void PrintingHandler::OnRenderPDFPagesToMetafileStop() {
-  ReleaseProcessIfNeeded();
-}
-
-int PrintingHandler::LoadPDF(base::File pdf_file) {
-  int64 length64 = pdf_file.GetLength();
-  if (length64 <= 0 || length64 > std::numeric_limits<int>::max())
-    return 0;
-  int length = static_cast<int>(length64);
-
-  pdf_data_.resize(length);
-  if (length != pdf_file.Read(0, pdf_data_.data(), pdf_data_.size()))
-    return 0;
-
-  int total_page_count = 0;
-  if (!chrome_pdf::GetPDFDocInfo(
-          &pdf_data_.front(), pdf_data_.size(), &total_page_count, NULL)) {
-    return 0;
-  }
-  return total_page_count;
-}
-
-bool PrintingHandler::RenderPdfPageToMetafile(int page_number,
-                                              base::File output_file,
-                                              float* scale_factor) {
-  printing::Emf metafile;
-  metafile.Init();
-
-  // We need to scale down DC to fit an entire page into DC available area.
-  // Current metafile is based on screen DC and have current screen size.
-  // Writing outside of those boundaries will result in the cut-off output.
-  // On metafiles (this is the case here), scaling down will still record
-  // original coordinates and we'll be able to print in full resolution.
-  // Before playback we'll need to counter the scaling up that will happen
-  // in the service (print_system_win.cc).
-  *scale_factor =
-      gfx::CalculatePageScale(metafile.context(),
-                              pdf_rendering_settings_.area().right(),
-                              pdf_rendering_settings_.area().bottom());
-  gfx::ScaleDC(metafile.context(), *scale_factor);
-
-  // The underlying metafile is of type Emf and ignores the arguments passed
-  // to StartPage.
-  metafile.StartPage(gfx::Size(), gfx::Rect(), 1);
-  if (!chrome_pdf::RenderPDFPageToDC(
-          &pdf_data_.front(),
-          pdf_data_.size(),
-          page_number,
-          metafile.context(),
-          pdf_rendering_settings_.dpi(),
-          pdf_rendering_settings_.area().x(),
-          pdf_rendering_settings_.area().y(),
-          pdf_rendering_settings_.area().width(),
-          pdf_rendering_settings_.area().height(),
-          true,
-          false,
-          true,
-          true,
-          pdf_rendering_settings_.autorotate())) {
-    return false;
-  }
-  metafile.FinishPage();
-  metafile.FinishDocument();
-  return metafile.SaveTo(&output_file);
-}
-
-#endif  // OS_WIN

chromium_src/chrome/utility/printing_handler_win.cc

@@ -0,0 +1,236 @@
+// Copyright 2014 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 "chrome/utility/printing_handler_win.h"
+
+#include "base/files/file_util.h"
+#include "base/lazy_instance.h"
+#include "base/path_service.h"
+#include "base/scoped_native_library.h"
+#include "chrome/common/print_messages.h"
+#include "content/public/utility/utility_thread.h"
+#include "printing/emf_win.h"
+#include "printing/page_range.h"
+#include "printing/pdf_render_settings.h"
+#include "ui/gfx/gdi_util.h"
+
+namespace {
+
+bool Send(IPC::Message* message) {
+  return content::UtilityThread::Get()->Send(message);
+}
+
+void ReleaseProcessIfNeeded() {
+  content::UtilityThread::Get()->ReleaseProcessIfNeeded();
+}
+
+class PdfFunctions {
+ public:
+  PdfFunctions() : get_pdf_doc_info_func_(NULL),
+                   render_pdf_to_dc_func_(NULL) {}
+
+  bool Init() {
+    base::FilePath pdf_module_path(FILE_PATH_LITERAL("pdf.dll"));
+    pdf_lib_.Reset(base::LoadNativeLibrary(pdf_module_path, NULL));
+    if (!pdf_lib_.is_valid()) {
+      LOG(WARNING) << "Couldn't load PDF plugin";
+      return false;
+    }
+
+    get_pdf_doc_info_func_ =
+        reinterpret_cast<GetPDFDocInfoProc>(
+            pdf_lib_.GetFunctionPointer("GetPDFDocInfo"));
+    LOG_IF(WARNING, !get_pdf_doc_info_func_) << "Missing GetPDFDocInfo";
+
+    render_pdf_to_dc_func_ =
+      reinterpret_cast<RenderPDFPageToDCProc>(
+          pdf_lib_.GetFunctionPointer("RenderPDFPageToDC"));
+    LOG_IF(WARNING, !render_pdf_to_dc_func_) << "Missing RenderPDFPageToDC";
+
+    if (!get_pdf_doc_info_func_ || !render_pdf_to_dc_func_) {
+      Reset();
+    }
+
+    return IsValid();
+  }
+
+  bool IsValid() const {
+    return pdf_lib_.is_valid();
+  }
+
+  void Reset() {
+    pdf_lib_.Reset(NULL);
+  }
+
+  bool GetPDFDocInfo(const void* pdf_buffer,
+                     int buffer_size,
+                     int* page_count,
+                     double* max_page_width) {
+    if (!get_pdf_doc_info_func_)
+      return false;
+    return get_pdf_doc_info_func_(pdf_buffer, buffer_size, page_count,
+                                  max_page_width);
+  }
+
+  bool RenderPDFPageToDC(const void* pdf_buffer,
+                         int buffer_size,
+                         int page_number,
+                         HDC dc,
+                         int dpi,
+                         int bounds_origin_x,
+                         int bounds_origin_y,
+                         int bounds_width,
+                         int bounds_height,
+                         bool fit_to_bounds,
+                         bool stretch_to_bounds,
+                         bool keep_aspect_ratio,
+                         bool center_in_bounds,
+                         bool autorotate) {
+    if (!render_pdf_to_dc_func_)
+      return false;
+    return render_pdf_to_dc_func_(pdf_buffer, buffer_size, page_number,
+                                  dc, dpi, bounds_origin_x,
+                                  bounds_origin_y, bounds_width, bounds_height,
+                                  fit_to_bounds, stretch_to_bounds,
+                                  keep_aspect_ratio, center_in_bounds,
+                                  autorotate);
+  }
+
+ private:
+  // Exported by PDF plugin.
+  typedef bool (*GetPDFDocInfoProc)(const void* pdf_buffer,
+                                    int buffer_size, int* page_count,
+                                    double* max_page_width);
+  typedef bool (*RenderPDFPageToDCProc)(
+      const void* pdf_buffer, int buffer_size, int page_number, HDC dc,
+      int dpi, int bounds_origin_x, int bounds_origin_y,
+      int bounds_width, int bounds_height, bool fit_to_bounds,
+      bool stretch_to_bounds, bool keep_aspect_ratio, bool center_in_bounds,
+      bool autorotate);
+
+  RenderPDFPageToDCProc render_pdf_to_dc_func_;
+  GetPDFDocInfoProc get_pdf_doc_info_func_;
+
+  base::ScopedNativeLibrary pdf_lib_;
+
+  DISALLOW_COPY_AND_ASSIGN(PdfFunctions);
+};
+
+base::LazyInstance<PdfFunctions> g_pdf_lib = LAZY_INSTANCE_INITIALIZER;
+
+}  // namespace
+
+PrintingHandlerWin::PrintingHandlerWin() {}
+
+PrintingHandlerWin::~PrintingHandlerWin() {}
+
+// static
+void PrintingHandlerWin::PreSandboxStartup() {
+  g_pdf_lib.Get().Init();
+}
+
+bool PrintingHandlerWin::OnMessageReceived(const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(PrintingHandlerWin, message)
+    IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToMetafiles,
+                        OnRenderPDFPagesToMetafile)
+    IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToMetafiles_GetPage,
+                        OnRenderPDFPagesToMetafileGetPage)
+    IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToMetafiles_Stop,
+                        OnRenderPDFPagesToMetafileStop)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void PrintingHandlerWin::OnRenderPDFPagesToMetafile(
+    IPC::PlatformFileForTransit pdf_transit,
+    const printing::PdfRenderSettings& settings) {
+  pdf_rendering_settings_ = settings;
+  base::File pdf_file = IPC::PlatformFileForTransitToFile(pdf_transit);
+  int page_count = LoadPDF(pdf_file.Pass());
+  //int page_count = 1;
+  Send(
+      new ChromeUtilityHostMsg_RenderPDFPagesToMetafiles_PageCount(page_count));
+}
+
+void PrintingHandlerWin::OnRenderPDFPagesToMetafileGetPage(
+    int page_number,
+    IPC::PlatformFileForTransit output_file) {
+  base::File emf_file = IPC::PlatformFileForTransitToFile(output_file);
+  float scale_factor = 1.0f;
+  bool success =
+      RenderPdfPageToMetafile(page_number, emf_file.Pass(), &scale_factor);
+  Send(new ChromeUtilityHostMsg_RenderPDFPagesToMetafiles_PageDone(
+      success, scale_factor));
+}
+
+void PrintingHandlerWin::OnRenderPDFPagesToMetafileStop() {
+  ReleaseProcessIfNeeded();
+}
+
+int PrintingHandlerWin::LoadPDF(base::File pdf_file) {
+  if (!g_pdf_lib.Get().IsValid())
+    return 0;
+
+  int64 length64 = pdf_file.GetLength();
+  if (length64 <= 0 || length64 > std::numeric_limits<int>::max())
+    return 0;
+  int length = static_cast<int>(length64);
+
+  pdf_data_.resize(length);
+  if (length != pdf_file.Read(0, pdf_data_.data(), pdf_data_.size()))
+    return 0;
+
+  int total_page_count = 0;
+  if (!g_pdf_lib.Get().GetPDFDocInfo(
+          &pdf_data_.front(), pdf_data_.size(), &total_page_count, NULL)) {
+    return 0;
+  }
+  return total_page_count;
+}
+
+bool PrintingHandlerWin::RenderPdfPageToMetafile(int page_number,
+                                                 base::File output_file,
+                                                 float* scale_factor) {
+  printing::Emf metafile;
+  metafile.Init();
+
+  // We need to scale down DC to fit an entire page into DC available area.
+  // Current metafile is based on screen DC and have current screen size.
+  // Writing outside of those boundaries will result in the cut-off output.
+  // On metafiles (this is the case here), scaling down will still record
+  // original coordinates and we'll be able to print in full resolution.
+  // Before playback we'll need to counter the scaling up that will happen
+  // in the service (print_system_win.cc).
+  *scale_factor =
+      gfx::CalculatePageScale(metafile.context(),
+                              pdf_rendering_settings_.area().right(),
+                              pdf_rendering_settings_.area().bottom());
+  gfx::ScaleDC(metafile.context(), *scale_factor);
+
+  // The underlying metafile is of type Emf and ignores the arguments passed
+  // to StartPage.
+  metafile.StartPage(gfx::Size(), gfx::Rect(), 1);
+  if (!g_pdf_lib.Get().RenderPDFPageToDC(
+          &pdf_data_.front(),
+          pdf_data_.size(),
+          page_number,
+          metafile.context(),
+          pdf_rendering_settings_.dpi(),
+          pdf_rendering_settings_.area().x(),
+          pdf_rendering_settings_.area().y(),
+          pdf_rendering_settings_.area().width(),
+          pdf_rendering_settings_.area().height(),
+          true,
+          false,
+          true,
+          true,
+          pdf_rendering_settings_.autorotate())) {
+    return false;
+  }
+  metafile.FinishPage();
+  metafile.FinishDocument();
+  return metafile.SaveTo(&output_file);
+}

chromium_src/chrome/utility/printing_handler_win.h

@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CHROME_UTILITY_PRINTING_HANDLER_H_
+#ifndef CHROME_UTILITY_PRINTING_HANDLER_WIN_H_
-#define CHROME_UTILITY_PRINTING_HANDLER_H_
+#define CHROME_UTILITY_PRINTING_HANDLER_WIN_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
@@ -11,10 +11,6 @@
 #include "ipc/ipc_platform_file.h"
 #include "printing/pdf_render_settings.h"
 
-#if !defined(ENABLE_PRINT_PREVIEW) && !defined(OS_WIN)
-#error "Windows or full printing must be enabled"
-#endif
-
 namespace printing {
 class PdfRenderSettings;
 struct PwgRasterSettings;
@@ -22,38 +18,34 @@ struct PageRange;
 }
 
 // Dispatches IPCs for printing.
-class PrintingHandler : public UtilityMessageHandler {
+class PrintingHandlerWin : public UtilityMessageHandler {
  public:
-  PrintingHandler();
+  PrintingHandlerWin();
-  ~PrintingHandler() override;
+  ~PrintingHandlerWin() override;
 
   // IPC::Listener:
   bool OnMessageReceived(const IPC::Message& message) override;
 
+  static void PrintingHandlerWin::PreSandboxStartup();
+
  private:
   // IPC message handlers.
-#if defined(OS_WIN)
   void OnRenderPDFPagesToMetafile(IPC::PlatformFileForTransit pdf_transit,
                                   const printing::PdfRenderSettings& settings);
   void OnRenderPDFPagesToMetafileGetPage(
       int page_number,
       IPC::PlatformFileForTransit output_file);
   void OnRenderPDFPagesToMetafileStop();
-#endif  // OS_WIN
 
-#if defined(OS_WIN)
   int LoadPDF(base::File pdf_file);
   bool RenderPdfPageToMetafile(int page_number,
                                base::File output_file,
                                float* scale_factor);
-#endif  // OS_WIN
 
-#if defined(OS_WIN)
   std::vector<char> pdf_data_;
   printing::PdfRenderSettings pdf_rendering_settings_;
-#endif
 
-  DISALLOW_COPY_AND_ASSIGN(PrintingHandler);
+  DISALLOW_COPY_AND_ASSIGN(PrintingHandlerWin);
 };
 
-#endif  // CHROME_UTILITY_PRINTING_HANDLER_H_
+#endif  // CHROME_UTILITY_PRINTING_HANDLER_WIN_H_

docs/api/browser-window.md

@@ -543,6 +543,10 @@ up system's default printer and default settings for printing.
 Calling `window.print()` in web page is equivalent to call
 `BrowserWindow.print({silent: false, printBackground: false})`.
 
+**Note:** On Windows, the print API relies on `pdf.dll`. If your application
+doesn't need print feature, you can safely remove `pdf.dll` in saving binary
+size.
+
 ### BrowserWindow.loadUrl(url)
 
 Same with `webContents.loadUrl(url)`.

filenames.gypi

@@ -381,8 +381,8 @@
       'chromium_src/chrome/browser/ui/views/color_chooser_win.cc',
       'chromium_src/chrome/browser/printing/pdf_to_emf_converter.cc',
       'chromium_src/chrome/browser/printing/pdf_to_emf_converter.h',
-      'chromium_src/chrome/utility/printing_handler.cc',
+      'chromium_src/chrome/utility/printing_handler_win.cc',
-      'chromium_src/chrome/utility/printing_handler.h',
+      'chromium_src/chrome/utility/printing_handler_win.h',
     ],
     'framework_sources': [
       'atom/app/atom_library_main.h',