chrome/utility/printing_handler.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/utility/printing_handler.h"
   6
   7 #include "base/files/file_util.h"
   8 #include "base/lazy_instance.h"
   9 #include "base/path_service.h"
  10 #include "base/scoped_native_library.h"
  11 #include "chrome/common/chrome_paths.h"
  12 #include "chrome/common/chrome_utility_printing_messages.h"
  13 #include "chrome/utility/cloud_print/bitmap_image.h"
  14 #include "chrome/utility/cloud_print/pwg_encoder.h"
  15 #include "content/public/utility/utility_thread.h"
  16 #include "printing/page_range.h"
  17 #include "printing/pdf_render_settings.h"
  18
  19 #if defined(OS_WIN)
  20 #include "base/win/iat_patch_function.h"
  21 #include "printing/emf_win.h"
  22 #include "ui/gfx/gdi_util.h"
  23 #endif
  24
  25 #if defined(ENABLE_PRINT_PREVIEW)
  26 #include "chrome/common/crash_keys.h"
  27 #include "printing/backend/print_backend.h"
  28 #endif
  29
  30 namespace {
  31
  32 bool Send(IPC::Message* message) {
  33   return content::UtilityThread::Get()->Send(message);
  34 }
  35
  36 void ReleaseProcessIfNeeded() {
  37   content::UtilityThread::Get()->ReleaseProcessIfNeeded();
  38 }
  39
  40 class PdfFunctionsBase {
  41  public:
  42   PdfFunctionsBase() : render_pdf_to_bitmap_func_(NULL),
  43                        get_pdf_doc_info_func_(NULL) {}
  44
  45   bool Init() {
  46     base::FilePath pdf_module_path;
  47     if (!PathService::Get(chrome::FILE_PDF_PLUGIN, &pdf_module_path) ||
  48         !base::PathExists(pdf_module_path)) {
  49       return false;
  50     }
  51
  52     pdf_lib_.Reset(base::LoadNativeLibrary(pdf_module_path, NULL));
  53     if (!pdf_lib_.is_valid()) {
  54       LOG(WARNING) << "Couldn't load PDF plugin";
  55       return false;
  56     }
  57
  58     render_pdf_to_bitmap_func_ =
  59         reinterpret_cast<RenderPDFPageToBitmapProc>(
  60             pdf_lib_.GetFunctionPointer("RenderPDFPageToBitmap"));
  61     LOG_IF(WARNING, !render_pdf_to_bitmap_func_) <<
  62         "Missing RenderPDFPageToBitmap";
  63
  64     get_pdf_doc_info_func_ =
  65         reinterpret_cast<GetPDFDocInfoProc>(
  66             pdf_lib_.GetFunctionPointer("GetPDFDocInfo"));
  67     LOG_IF(WARNING, !get_pdf_doc_info_func_) << "Missing GetPDFDocInfo";
  68
  69     if (!render_pdf_to_bitmap_func_ || !get_pdf_doc_info_func_ ||
  70         !PlatformInit(pdf_module_path, pdf_lib_)) {
  71       Reset();
  72     }
  73
  74     return IsValid();
  75   }
  76
  77   bool IsValid() const {
  78     return pdf_lib_.is_valid();
  79   }
  80
  81   void Reset() {
  82     pdf_lib_.Reset(NULL);
  83   }
  84
  85   bool RenderPDFPageToBitmap(const void* pdf_buffer,
  86                              int pdf_buffer_size,
  87                              int page_number,
  88                              void* bitmap_buffer,
  89                              int bitmap_width,
  90                              int bitmap_height,
  91                              int dpi_x,
  92                              int dpi_y,
  93                              bool autorotate) {
  94     if (!render_pdf_to_bitmap_func_)
  95       return false;
  96     return render_pdf_to_bitmap_func_(pdf_buffer, pdf_buffer_size, page_number,
  97                                       bitmap_buffer, bitmap_width,
  98                                       bitmap_height, dpi_x, dpi_y, autorotate);
  99   }
 100
 101   bool GetPDFDocInfo(const void* pdf_buffer,
 102                      int buffer_size,
 103                      int* page_count,
 104                      double* max_page_width) {
 105     if (!get_pdf_doc_info_func_)
 106       return false;
 107     return get_pdf_doc_info_func_(pdf_buffer, buffer_size, page_count,
 108                                   max_page_width);
 109   }
 110
 111  protected:
 112   virtual bool PlatformInit(
 113       const base::FilePath& pdf_module_path,
 114       const base::ScopedNativeLibrary& pdf_lib) {
 115     return true;
 116   }
 117
 118  private:
 119   // Exported by PDF plugin.
 120   typedef bool (*RenderPDFPageToBitmapProc)(const void* pdf_buffer,
 121                                             int pdf_buffer_size,
 122                                             int page_number,
 123                                             void* bitmap_buffer,
 124                                             int bitmap_width,
 125                                             int bitmap_height,
 126                                             int dpi_x,
 127                                             int dpi_y,
 128                                             bool autorotate);
 129   typedef bool (*GetPDFDocInfoProc)(const void* pdf_buffer,
 130                                     int buffer_size, int* page_count,
 131                                     double* max_page_width);
 132
 133   RenderPDFPageToBitmapProc render_pdf_to_bitmap_func_;
 134   GetPDFDocInfoProc get_pdf_doc_info_func_;
 135
 136   base::ScopedNativeLibrary pdf_lib_;
 137   DISALLOW_COPY_AND_ASSIGN(PdfFunctionsBase);
 138 };
 139
 140 #if defined(OS_WIN)
 141 // The 2 below IAT patch functions are almost identical to the code in
 142 // render_process_impl.cc. This is needed to work around specific Windows APIs
 143 // used by the Chrome PDF plugin that will fail in the sandbox.
 144 static base::win::IATPatchFunction g_iat_patch_createdca;
 145 HDC WINAPI UtilityProcess_CreateDCAPatch(LPCSTR driver_name,
 146                                          LPCSTR device_name,
 147                                          LPCSTR output,
 148                                          const DEVMODEA* init_data) {
 149   if (driver_name && (std::string("DISPLAY") == driver_name)) {
 150     // CreateDC fails behind the sandbox, but not CreateCompatibleDC.
 151     return CreateCompatibleDC(NULL);
 152   }
 153
 154   NOTREACHED();
 155   return CreateDCA(driver_name, device_name, output, init_data);
 156 }
 157
 158 static base::win::IATPatchFunction g_iat_patch_get_font_data;
 159 DWORD WINAPI UtilityProcess_GetFontDataPatch(
 160     HDC hdc, DWORD table, DWORD offset, LPVOID buffer, DWORD length) {
 161   int rv = GetFontData(hdc, table, offset, buffer, length);
 162   if (rv == GDI_ERROR && hdc) {
 163     HFONT font = static_cast<HFONT>(GetCurrentObject(hdc, OBJ_FONT));
 164
 165     LOGFONT logfont;
 166     if (GetObject(font, sizeof(LOGFONT), &logfont)) {
 167       content::UtilityThread::Get()->PreCacheFont(logfont);
 168       rv = GetFontData(hdc, table, offset, buffer, length);
 169       content::UtilityThread::Get()->ReleaseCachedFonts();
 170     }
 171   }
 172   return rv;
 173 }
 174
 175 class PdfFunctionsWin : public PdfFunctionsBase {
 176  public:
 177   PdfFunctionsWin() : render_pdf_to_dc_func_(NULL) {
 178   }
 179
 180   bool PlatformInit(
 181       const base::FilePath& pdf_module_path,
 182       const base::ScopedNativeLibrary& pdf_lib) override {
 183     // Patch the IAT for handling specific APIs known to fail in the sandbox.
 184     if (!g_iat_patch_createdca.is_patched()) {
 185       g_iat_patch_createdca.Patch(pdf_module_path.value().c_str(),
 186                                   "gdi32.dll", "CreateDCA",
 187                                   UtilityProcess_CreateDCAPatch);
 188     }
 189
 190     if (!g_iat_patch_get_font_data.is_patched()) {
 191       g_iat_patch_get_font_data.Patch(pdf_module_path.value().c_str(),
 192                                       "gdi32.dll", "GetFontData",
 193                                       UtilityProcess_GetFontDataPatch);
 194     }
 195     render_pdf_to_dc_func_ =
 196       reinterpret_cast<RenderPDFPageToDCProc>(
 197           pdf_lib.GetFunctionPointer("RenderPDFPageToDC"));
 198     LOG_IF(WARNING, !render_pdf_to_dc_func_) << "Missing RenderPDFPageToDC";
 199
 200     return render_pdf_to_dc_func_ != NULL;
 201   }
 202
 203   bool RenderPDFPageToDC(const void* pdf_buffer,
 204                          int buffer_size,
 205                          int page_number,
 206                          HDC dc,
 207                          int dpi_x,
 208                          int dpi_y,
 209                          int bounds_origin_x,
 210                          int bounds_origin_y,
 211                          int bounds_width,
 212                          int bounds_height,
 213                          bool fit_to_bounds,
 214                          bool stretch_to_bounds,
 215                          bool keep_aspect_ratio,
 216                          bool center_in_bounds,
 217                          bool autorotate) {
 218     if (!render_pdf_to_dc_func_)
 219       return false;
 220     return render_pdf_to_dc_func_(pdf_buffer, buffer_size, page_number,
 221                                   dc, dpi_x, dpi_y, bounds_origin_x,
 222                                   bounds_origin_y, bounds_width, bounds_height,
 223                                   fit_to_bounds, stretch_to_bounds,
 224                                   keep_aspect_ratio, center_in_bounds,
 225                                   autorotate);
 226   }
 227
 228  private:
 229   // Exported by PDF plugin.
 230   typedef bool (*RenderPDFPageToDCProc)(
 231       const void* pdf_buffer, int buffer_size, int page_number, HDC dc,
 232       int dpi_x, int dpi_y, int bounds_origin_x, int bounds_origin_y,
 233       int bounds_width, int bounds_height, bool fit_to_bounds,
 234       bool stretch_to_bounds, bool keep_aspect_ratio, bool center_in_bounds,
 235       bool autorotate);
 236   RenderPDFPageToDCProc render_pdf_to_dc_func_;
 237
 238   DISALLOW_COPY_AND_ASSIGN(PdfFunctionsWin);
 239 };
 240
 241 typedef PdfFunctionsWin PdfFunctions;
 242 #else  // OS_WIN
 243 typedef PdfFunctionsBase PdfFunctions;
 244 #endif  // OS_WIN
 245
 246 base::LazyInstance<PdfFunctions> g_pdf_lib = LAZY_INSTANCE_INITIALIZER;
 247
 248 }  // namespace
 249
 250 PrintingHandler::PrintingHandler() {}
 251
 252 PrintingHandler::~PrintingHandler() {}
 253
 254 // static
 255 void PrintingHandler::PreSandboxStartup() {
 256   g_pdf_lib.Get().Init();
 257 }
 258
 259 bool PrintingHandler::OnMessageReceived(const IPC::Message& message) {
 260   bool handled = true;
 261   IPC_BEGIN_MESSAGE_MAP(PrintingHandler, message)
 262 #if defined(OS_WIN)
 263     IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToMetafiles,
 264                         OnRenderPDFPagesToMetafile)
 265     IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToMetafiles_GetPage,
 266                         OnRenderPDFPagesToMetafileGetPage)
 267     IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToMetafiles_Stop,
 268                         OnRenderPDFPagesToMetafileStop)
 269 #endif  // OS_WIN
 270 #if defined(ENABLE_PRINT_PREVIEW)
 271     IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToPWGRaster,
 272                         OnRenderPDFPagesToPWGRaster)
 273     IPC_MESSAGE_HANDLER(ChromeUtilityMsg_GetPrinterCapsAndDefaults,
 274                         OnGetPrinterCapsAndDefaults)
 275     IPC_MESSAGE_HANDLER(ChromeUtilityMsg_GetPrinterSemanticCapsAndDefaults,
 276                         OnGetPrinterSemanticCapsAndDefaults)
 277 #endif  // ENABLE_PRINT_PREVIEW
 278     IPC_MESSAGE_UNHANDLED(handled = false)
 279   IPC_END_MESSAGE_MAP()
 280   return handled;
 281 }
 282
 283 #if defined(OS_WIN)
 284 void PrintingHandler::OnRenderPDFPagesToMetafile(
 285     IPC::PlatformFileForTransit pdf_transit,
 286     const printing::PdfRenderSettings& settings) {
 287   pdf_rendering_settings_ = settings;
 288   base::File pdf_file = IPC::PlatformFileForTransitToFile(pdf_transit);
 289   int page_count = LoadPDF(pdf_file.Pass());
 290   Send(
 291       new ChromeUtilityHostMsg_RenderPDFPagesToMetafiles_PageCount(page_count));
 292 }
 293
 294 void PrintingHandler::OnRenderPDFPagesToMetafileGetPage(
 295     int page_number,
 296     IPC::PlatformFileForTransit output_file) {
 297   base::File emf_file = IPC::PlatformFileForTransitToFile(output_file);
 298   float scale_factor = 1.0f;
 299   bool success =
 300       RenderPdfPageToMetafile(page_number, emf_file.Pass(), &scale_factor);
 301   Send(new ChromeUtilityHostMsg_RenderPDFPagesToMetafiles_PageDone(
 302       success, scale_factor));
 303 }
 304
 305 void PrintingHandler::OnRenderPDFPagesToMetafileStop() {
 306   ReleaseProcessIfNeeded();
 307 }
 308
 309 #endif  // OS_WIN
 310
 311 #if defined(ENABLE_PRINT_PREVIEW)
 312 void PrintingHandler::OnRenderPDFPagesToPWGRaster(
 313     IPC::PlatformFileForTransit pdf_transit,
 314     const printing::PdfRenderSettings& settings,
 315     const printing::PwgRasterSettings& bitmap_settings,
 316     IPC::PlatformFileForTransit bitmap_transit) {
 317   base::File pdf = IPC::PlatformFileForTransitToFile(pdf_transit);
 318   base::File bitmap = IPC::PlatformFileForTransitToFile(bitmap_transit);
 319   if (RenderPDFPagesToPWGRaster(pdf.Pass(), settings, bitmap_settings,
 320                                 bitmap.Pass())) {
 321     Send(new ChromeUtilityHostMsg_RenderPDFPagesToPWGRaster_Succeeded());
 322   } else {
 323     Send(new ChromeUtilityHostMsg_RenderPDFPagesToPWGRaster_Failed());
 324   }
 325   ReleaseProcessIfNeeded();
 326 }
 327 #endif  // ENABLE_PRINT_PREVIEW
 328
 329 #if defined(OS_WIN)
 330 int PrintingHandler::LoadPDF(base::File pdf_file) {
 331   if (!g_pdf_lib.Get().IsValid())
 332     return 0;
 333
 334   int64 length64 = pdf_file.GetLength();
 335   if (length64 <= 0 || length64 > std::numeric_limits<int>::max())
 336     return 0;
 337   int length = static_cast<int>(length64);
 338
 339   pdf_data_.resize(length);
 340   if (length != pdf_file.Read(0, pdf_data_.data(), pdf_data_.size()))
 341     return 0;
 342
 343   int total_page_count = 0;
 344   if (!g_pdf_lib.Get().GetPDFDocInfo(
 345           &pdf_data_.front(), pdf_data_.size(), &total_page_count, NULL)) {
 346     return 0;
 347   }
 348   return total_page_count;
 349 }
 350
 351 bool PrintingHandler::RenderPdfPageToMetafile(int page_number,
 352                                               base::File output_file,
 353                                               float* scale_factor) {
 354   printing::Emf metafile;
 355   metafile.Init();
 356
 357   // We need to scale down DC to fit an entire page into DC available area.
 358   // Current metafile is based on screen DC and have current screen size.
 359   // Writing outside of those boundaries will result in the cut-off output.
 360   // On metafiles (this is the case here), scaling down will still record
 361   // original coordinates and we'll be able to print in full resolution.
 362   // Before playback we'll need to counter the scaling up that will happen
 363   // in the service (print_system_win.cc).
 364   *scale_factor =
 365       gfx::CalculatePageScale(metafile.context(),
 366                               pdf_rendering_settings_.area().right(),
 367                               pdf_rendering_settings_.area().bottom());
 368   gfx::ScaleDC(metafile.context(), *scale_factor);
 369
 370   // The underlying metafile is of type Emf and ignores the arguments passed
 371   // to StartPage.
 372   metafile.StartPage(gfx::Size(), gfx::Rect(), 1);
 373   if (!g_pdf_lib.Get().RenderPDFPageToDC(
 374           &pdf_data_.front(),
 375           pdf_data_.size(),
 376           page_number,
 377           metafile.context(),
 378           pdf_rendering_settings_.dpi(),
 379           pdf_rendering_settings_.dpi(),
 380           pdf_rendering_settings_.area().x(),
 381           pdf_rendering_settings_.area().y(),
 382           pdf_rendering_settings_.area().width(),
 383           pdf_rendering_settings_.area().height(),
 384           true,
 385           false,
 386           true,
 387           true,
 388           pdf_rendering_settings_.autorotate())) {
 389     return false;
 390   }
 391   metafile.FinishPage();
 392   metafile.FinishDocument();
 393   return metafile.SaveTo(&output_file);
 394 }
 395
 396 #endif  // OS_WIN
 397
 398 #if defined(ENABLE_PRINT_PREVIEW)
 399 bool PrintingHandler::RenderPDFPagesToPWGRaster(
 400     base::File pdf_file,
 401     const printing::PdfRenderSettings& settings,
 402     const printing::PwgRasterSettings& bitmap_settings,
 403     base::File bitmap_file) {
 404   bool autoupdate = true;
 405   if (!g_pdf_lib.Get().IsValid())
 406     return false;
 407
 408   base::File::Info info;
 409   if (!pdf_file.GetInfo(&info) || info.size <= 0 ||
 410       info.size > std::numeric_limits<int>::max())
 411     return false;
 412   int data_size = static_cast<int>(info.size);
 413
 414   std::string data(data_size, 0);
 415   if (pdf_file.Read(0, &data[0], data_size) != data_size)
 416     return false;
 417
 418   int total_page_count = 0;
 419   if (!g_pdf_lib.Get().GetPDFDocInfo(data.data(), data_size,
 420                                      &total_page_count, NULL)) {
 421     return false;
 422   }
 423
 424   cloud_print::PwgEncoder encoder;
 425   std::string pwg_header;
 426   encoder.EncodeDocumentHeader(&pwg_header);
 427   int bytes_written = bitmap_file.WriteAtCurrentPos(pwg_header.data(),
 428                                                     pwg_header.size());
 429   if (bytes_written != static_cast<int>(pwg_header.size()))
 430     return false;
 431
 432   cloud_print::BitmapImage image(settings.area().size(),
 433                                  cloud_print::BitmapImage::BGRA);
 434   for (int i = 0; i < total_page_count; ++i) {
 435     int page_number = i;
 436
 437     if (bitmap_settings.reverse_page_order) {
 438       page_number = total_page_count - 1 - page_number;
 439     }
 440
 441     if (!g_pdf_lib.Get().RenderPDFPageToBitmap(data.data(),
 442                                                data_size,
 443                                                page_number,
 444                                                image.pixel_data(),
 445                                                image.size().width(),
 446                                                image.size().height(),
 447                                                settings.dpi(),
 448                                                settings.dpi(),
 449                                                autoupdate)) {
 450       return false;
 451     }
 452
 453     cloud_print::PwgHeaderInfo header_info;
 454     header_info.dpi = settings.dpi();
 455     header_info.total_pages = total_page_count;
 456
 457     // Transform odd pages.
 458     if (page_number % 2) {
 459       switch (bitmap_settings.odd_page_transform) {
 460         case printing::TRANSFORM_NORMAL:
 461           break;
 462         case printing::TRANSFORM_ROTATE_180:
 463           header_info.flipx = true;
 464           header_info.flipy = true;
 465           break;
 466         case printing::TRANSFORM_FLIP_HORIZONTAL:
 467           header_info.flipx = true;
 468           break;
 469         case printing::TRANSFORM_FLIP_VERTICAL:
 470           header_info.flipy = true;
 471           break;
 472       }
 473     }
 474
 475     if (bitmap_settings.rotate_all_pages) {
 476       header_info.flipx = !header_info.flipx;
 477       header_info.flipy = !header_info.flipy;
 478     }
 479
 480     std::string pwg_page;
 481     if (!encoder.EncodePage(image, header_info, &pwg_page))
 482       return false;
 483     bytes_written = bitmap_file.WriteAtCurrentPos(pwg_page.data(),
 484                                                   pwg_page.size());
 485     if (bytes_written != static_cast<int>(pwg_page.size()))
 486       return false;
 487   }
 488   return true;
 489 }
 490
 491 void PrintingHandler::OnGetPrinterCapsAndDefaults(
 492     const std::string& printer_name) {
 493   scoped_refptr<printing::PrintBackend> print_backend =
 494       printing::PrintBackend::CreateInstance(NULL);
 495   printing::PrinterCapsAndDefaults printer_info;
 496
 497   crash_keys::ScopedPrinterInfo crash_key(
 498       print_backend->GetPrinterDriverInfo(printer_name));
 499
 500   if (print_backend->GetPrinterCapsAndDefaults(printer_name, &printer_info)) {
 501     Send(new ChromeUtilityHostMsg_GetPrinterCapsAndDefaults_Succeeded(
 502         printer_name, printer_info));
 503   } else  {
 504     Send(new ChromeUtilityHostMsg_GetPrinterCapsAndDefaults_Failed(
 505         printer_name));
 506   }
 507   ReleaseProcessIfNeeded();
 508 }
 509
 510 void PrintingHandler::OnGetPrinterSemanticCapsAndDefaults(
 511     const std::string& printer_name) {
 512   scoped_refptr<printing::PrintBackend> print_backend =
 513       printing::PrintBackend::CreateInstance(NULL);
 514   printing::PrinterSemanticCapsAndDefaults printer_info;
 515
 516   crash_keys::ScopedPrinterInfo crash_key(
 517       print_backend->GetPrinterDriverInfo(printer_name));
 518
 519   if (print_backend->GetPrinterSemanticCapsAndDefaults(printer_name,
 520                                                        &printer_info)) {
 521     Send(new ChromeUtilityHostMsg_GetPrinterSemanticCapsAndDefaults_Succeeded(
 522         printer_name, printer_info));
 523   } else {
 524     Send(new ChromeUtilityHostMsg_GetPrinterSemanticCapsAndDefaults_Failed(
 525         printer_name));
 526   }
 527   ReleaseProcessIfNeeded();
 528 }
 529 #endif  // ENABLE_PRINT_PREVIEW