Add Postscript Printing

chrome/utility/printing_handler.cc

Index: chrome/utility/printing_handler.cc
diff --git a/chrome/utility/printing_handler.cc b/chrome/utility/printing_handler.cc
index 390cd39b2f6b26e023c3e1418966cfba17c690a7..73daac7c62d88fddee10484c4a7dc42fdb53caea 100644
--- a/chrome/utility/printing_handler.cc
+++ b/chrome/utility/printing_handler.cc
@@ -70,6 +70,12 @@ bool PrintingHandler::OnMessageReceived(const IPC::Message& message) {
                         OnRenderPDFPagesToMetafileGetPage)
     IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToMetafiles_Stop,
                         OnRenderPDFPagesToMetafileStop)
+    IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToPostScript_Start,
+                        OnRenderPDFPagesToPostScriptStart)
+    IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToPostScript_GetPage,
+                        OnRenderPDFPagesToPostScriptGetPage)
+    IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToPostScript_Stop,
+                        OnRenderPDFPagesToPostScriptStop)
 #endif  // OS_WIN
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
     IPC_MESSAGE_HANDLER(ChromeUtilityMsg_RenderPDFPagesToPWGRaster,
@@ -89,6 +95,7 @@ void PrintingHandler::OnRenderPDFPagesToMetafile(
     IPC::PlatformFileForTransit pdf_transit,
     const PdfRenderSettings& settings) {
   pdf_rendering_settings_ = settings;
+  chrome_pdf::SetPDFPostscriptPrintingLevel(0);  // Not using postscript.
   chrome_pdf::SetPDFUseGDIPrinting(pdf_rendering_settings_.mode ==
                                    PdfRenderSettings::Mode::GDI_TEXT);
   base::File pdf_file = IPC::PlatformFileForTransitToFile(pdf_transit);
@@ -112,7 +119,36 @@ void PrintingHandler::OnRenderPDFPagesToMetafileStop() {
   ReleaseProcessIfNeeded();
 }
 
-#endif  // OS_WIN
+void PrintingHandler::OnRenderPDFPagesToPostScriptStart(
+    IPC::PlatformFileForTransit pdf_transit,
+    const PdfRenderSettings& settings) {
+  pdf_rendering_settings_ = settings;
+  if (pdf_rendering_settings_.mode ==
+      PdfRenderSettings::Mode::POSTSCRIPT_LEVEL2) {
+    chrome_pdf::SetPDFPostscriptPrintingLevel(2);
+  } else if (pdf_rendering_settings_.mode ==
+             PdfRenderSettings::Mode::POSTSCRIPT_LEVEL3) {
+    chrome_pdf::SetPDFPostscriptPrintingLevel(3);
+  }
+
+  base::File pdf_file = IPC::PlatformFileForTransitToFile(pdf_transit);
+  int page_count = LoadPDF(std::move(pdf_file));
+  Send(new ChromeUtilityHostMsg_RenderPDFPagesToPostScript_PageCount(
+      page_count));
+}
+
+void PrintingHandler::OnRenderPDFPagesToPostScriptGetPage(
+    int page_number,
+    IPC::PlatformFileForTransit output_file) {
+  base::File ps_file = IPC::PlatformFileForTransitToFile(output_file);
+  bool success = RenderPdfPageToPostScript(page_number, std::move(ps_file));
+  Send(new ChromeUtilityHostMsg_RenderPDFPagesToPostScript_PageDone(success));
+}
+
+void PrintingHandler::OnRenderPDFPagesToPostScriptStop() {
+  ReleaseProcessIfNeeded();
+}
+#endif  // defined(OS_WIN)
 
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 void PrintingHandler::OnRenderPDFPagesToPWGRaster(
@@ -130,7 +166,7 @@ void PrintingHandler::OnRenderPDFPagesToPWGRaster(
   }
   ReleaseProcessIfNeeded();
 }
-#endif  // ENABLE_PRINT_PREVIEW
+#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 #if defined(OS_WIN)
 int PrintingHandler::LoadPDF(base::File pdf_file) {
@@ -185,6 +221,30 @@ bool PrintingHandler::RenderPdfPageToMetafile(int page_number,
   metafile.FinishDocument();
   return metafile.SaveTo(&output_file);
 }
+
+bool PrintingHandler::RenderPdfPageToPostScript(int page_number,
+                                                base::File output_file) {
+  Emf metafile;
+  metafile.Init();
+
+  // 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_.offsets.x(),
+          pdf_rendering_settings_.area.y() -
+              pdf_rendering_settings_.offsets.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  // defined(OS_WIN)
 
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
@@ -309,6 +369,6 @@ void PrintingHandler::OnGetPrinterSemanticCapsAndDefaults(
   }
   ReleaseProcessIfNeeded();
 }
-#endif  // ENABLE_PRINT_PREVIEW
+#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 }  // namespace printing