Combine PDF plugin into the Chromium binary.

chrome/utility/printing_handler.cc

 // 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/chrome_paths.h"
 #include "chrome/common/chrome_utility_printing_messages.h"
 #include "chrome/utility/cloud_print/bitmap_image.h"
 #include "chrome/utility/cloud_print/pwg_encoder.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
 
 #if defined(ENABLE_PRINT_PREVIEW)
 #include "chrome/common/crash_keys.h"
 #include "printing/backend/print_backend.h"
 #endif
 
 namespace {
 
 bool Send(IPC::Message* message) {
   return content::UtilityThread::Get()->Send(message);
 }
 
 void ReleaseProcessIfNeeded() {
   content::UtilityThread::Get()->ReleaseProcessIfNeeded();
 }
 
-class PdfFunctionsBase {
- public:
-  PdfFunctionsBase() : render_pdf_to_bitmap_func_(NULL),
-                       get_pdf_doc_info_func_(NULL) {}
-
-  bool Init() {
-    base::FilePath pdf_module_path;
-    if (!PathService::Get(chrome::FILE_PDF_PLUGIN, &pdf_module_path) ||
-        !base::PathExists(pdf_module_path)) {
-      return false;
-    }
-
-    pdf_lib_.Reset(base::LoadNativeLibrary(pdf_module_path, NULL));
-    if (!pdf_lib_.is_valid()) {
-      LOG(WARNING) << "Couldn't load PDF plugin";
-      return false;
-    }
-
-    render_pdf_to_bitmap_func_ =
-        reinterpret_cast<RenderPDFPageToBitmapProc>(
-            pdf_lib_.GetFunctionPointer("RenderPDFPageToBitmap"));
-    LOG_IF(WARNING, !render_pdf_to_bitmap_func_) <<
-        "Missing RenderPDFPageToBitmap";
-
-    get_pdf_doc_info_func_ =
-        reinterpret_cast<GetPDFDocInfoProc>(
-            pdf_lib_.GetFunctionPointer("GetPDFDocInfo"));
-    LOG_IF(WARNING, !get_pdf_doc_info_func_) << "Missing GetPDFDocInfo";
-
-    if (!render_pdf_to_bitmap_func_ || !get_pdf_doc_info_func_ ||
-        !PlatformInit(pdf_module_path, pdf_lib_)) {
-      Reset();
-    }
-
-    return IsValid();
-  }
-
-  bool IsValid() const {
-    return pdf_lib_.is_valid();
-  }
-
-  void Reset() {
-    pdf_lib_.Reset(NULL);
-  }
-
-  bool RenderPDFPageToBitmap(const void* pdf_buffer,
-                             int pdf_buffer_size,
-                             int page_number,
-                             void* bitmap_buffer,
-                             int bitmap_width,
-                             int bitmap_height,
-                             int dpi_x,
-                             int dpi_y,
-                             bool autorotate) {
-    if (!render_pdf_to_bitmap_func_)
-      return false;
-    return render_pdf_to_bitmap_func_(pdf_buffer, pdf_buffer_size, page_number,
-                                      bitmap_buffer, bitmap_width,
-                                      bitmap_height, dpi_x, dpi_y, autorotate);
-  }
-
-  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);
-  }
-
- protected:
-  virtual bool PlatformInit(
-      const base::FilePath& pdf_module_path,
-      const base::ScopedNativeLibrary& pdf_lib) {
-    return true;
-  }
-
- private:
-  // Exported by PDF plugin.
-  typedef bool (*RenderPDFPageToBitmapProc)(const void* pdf_buffer,
-                                            int pdf_buffer_size,
-                                            int page_number,
-                                            void* bitmap_buffer,
-                                            int bitmap_width,
-                                            int bitmap_height,
-                                            int dpi_x,
-                                            int dpi_y,
-                                            bool autorotate);
-  typedef bool (*GetPDFDocInfoProc)(const void* pdf_buffer,
-                                    int buffer_size, int* page_count,
-                                    double* max_page_width);
-
-  RenderPDFPageToBitmapProc render_pdf_to_bitmap_func_;
-  GetPDFDocInfoProc get_pdf_doc_info_func_;
-
-  base::ScopedNativeLibrary pdf_lib_;
-  DISALLOW_COPY_AND_ASSIGN(PdfFunctionsBase);
-};
-
-#if defined(OS_WIN)
-
-class PdfFunctionsWin : public PdfFunctionsBase {
- public:
-  PdfFunctionsWin() : render_pdf_to_dc_func_(NULL) {
-  }
-
-  bool PlatformInit(
-      const base::FilePath& pdf_module_path,
-      const base::ScopedNativeLibrary& pdf_lib) override {
-    render_pdf_to_dc_func_ =
-      reinterpret_cast<RenderPDFPageToDCProc>(
-          pdf_lib.GetFunctionPointer("RenderPDFPageToDC"));
-    LOG_IF(WARNING, !render_pdf_to_dc_func_) << "Missing RenderPDFPageToDC";
-
-    return render_pdf_to_dc_func_ != NULL;
-  }
-
-  bool RenderPDFPageToDC(const void* pdf_buffer,
-                         int buffer_size,
-                         int page_number,
-                         HDC dc,
-                         int dpi_x,
-                         int dpi_y,
-                         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_x, dpi_y, 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 (*RenderPDFPageToDCProc)(
-      const void* pdf_buffer, int buffer_size, int page_number, HDC dc,
-      int dpi_x, int dpi_y, 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_;
-
-  DISALLOW_COPY_AND_ASSIGN(PdfFunctionsWin);
-};
-
-typedef PdfFunctionsWin PdfFunctions;
-#else  // OS_WIN
-typedef PdfFunctionsBase PdfFunctions;
-#endif  // OS_WIN
-
-base::LazyInstance<PdfFunctions> g_pdf_lib = LAZY_INSTANCE_INITIALIZER;
-
 }  // namespace
 
 PrintingHandler::PrintingHandler() {}
 
 PrintingHandler::~PrintingHandler() {}
 
-// static
-void PrintingHandler::PreSandboxStartup() {
-  g_pdf_lib.Get().Init();
-}
-
 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)
@@ skipping 52 matching lines @@
     Send(new ChromeUtilityHostMsg_RenderPDFPagesToPWGRaster_Succeeded());
   } else {
     Send(new ChromeUtilityHostMsg_RenderPDFPagesToPWGRaster_Failed());
   }
   ReleaseProcessIfNeeded();
 }
 #endif  // ENABLE_PRINT_PREVIEW
 
 #if defined(OS_WIN)
 int PrintingHandler::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(
+  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 (!g_pdf_lib.Get().RenderPDFPageToDC(
+  if (!chrome_pdf::RenderPDFPageToDC(
           &pdf_data_.front(),
           pdf_data_.size(),
           page_number,
           metafile.context(),
           pdf_rendering_settings_.dpi(),
-          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
 
 #if defined(ENABLE_PRINT_PREVIEW)
 bool PrintingHandler::RenderPDFPagesToPWGRaster(
     base::File pdf_file,
     const printing::PdfRenderSettings& settings,
     const printing::PwgRasterSettings& bitmap_settings,
     base::File bitmap_file) {
   bool autoupdate = true;
-  if (!g_pdf_lib.Get().IsValid())
-    return false;
-
   base::File::Info info;
   if (!pdf_file.GetInfo(&info) || info.size <= 0 ||
       info.size > std::numeric_limits<int>::max())
     return false;
   int data_size = static_cast<int>(info.size);
 
   std::string data(data_size, 0);
   if (pdf_file.Read(0, &data[0], data_size) != data_size)
     return false;
 
   int total_page_count = 0;
-  if (!g_pdf_lib.Get().GetPDFDocInfo(data.data(), data_size,
-                                     &total_page_count, NULL)) {
+  if (!chrome_pdf::GetPDFDocInfo(data.data(), data_size,
+                                 &total_page_count, NULL)) {
     return false;
   }
 
   cloud_print::PwgEncoder encoder;
   std::string pwg_header;
   encoder.EncodeDocumentHeader(&pwg_header);
   int bytes_written = bitmap_file.WriteAtCurrentPos(pwg_header.data(),
                                                     pwg_header.size());
   if (bytes_written != static_cast<int>(pwg_header.size()))
     return false;
 
   cloud_print::BitmapImage image(settings.area().size(),
                                  cloud_print::BitmapImage::BGRA);
   for (int i = 0; i < total_page_count; ++i) {
     int page_number = i;
 
     if (bitmap_settings.reverse_page_order) {
       page_number = total_page_count - 1 - page_number;
     }
 
-    if (!g_pdf_lib.Get().RenderPDFPageToBitmap(data.data(),
-                                               data_size,
-                                               page_number,
-                                               image.pixel_data(),
-                                               image.size().width(),
-                                               image.size().height(),
-                                               settings.dpi(),
-                                               settings.dpi(),
-                                               autoupdate)) {
+    if (!chrome_pdf::RenderPDFPageToBitmap(data.data(),
+                                           data_size,
+                                           page_number,
+                                           image.pixel_data(),
+                                           image.size().width(),
+                                           image.size().height(),
+                                           settings.dpi(),
+                                           autoupdate)) {
       return false;
     }
 
     cloud_print::PwgHeaderInfo header_info;
     header_info.dpi = settings.dpi();
     header_info.total_pages = total_page_count;
 
     // Transform odd pages.
     if (page_number % 2) {
       switch (bitmap_settings.odd_page_transform) {
@@ skipping 60 matching lines @@
                                                        &printer_info)) {
     Send(new ChromeUtilityHostMsg_GetPrinterSemanticCapsAndDefaults_Succeeded(
         printer_name, printer_info));
   } else {
     Send(new ChromeUtilityHostMsg_GetPrinterSemanticCapsAndDefaults_Failed(
         printer_name));
   }
   ReleaseProcessIfNeeded();
 }
 #endif  // ENABLE_PRINT_PREVIEW