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..35dc231ea1d7948d5a827f3a05ac9896e43a1fc4 100644
--- a/chrome/utility/printing_handler.cc
+++ b/chrome/utility/printing_handler.cc
@@ -89,8 +89,16 @@ 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);
+  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(
@@ -102,8 +110,17 @@ void PrintingHandler::OnRenderPDFPagesToMetafileGetPage(
     IPC::PlatformFileForTransit output_file) {
   base::File emf_file = IPC::PlatformFileForTransitToFile(output_file);
   float scale_factor = 1.0f;
-  bool success =
-      RenderPdfPageToMetafile(page_number, std::move(emf_file), &scale_factor);
+  bool success = false;
+  if (pdf_rendering_settings_.mode ==
+          PdfRenderSettings::Mode::POSTSCRIPT_LEVEL2 ||
+      pdf_rendering_settings_.mode ==
+          PdfRenderSettings::Mode::POSTSCRIPT_LEVEL3) {
+    success = RenderPdfPageToPostScript(page_number, std::move(emf_file));
+  } else {
+    success = RenderPdfPageToMetafile(page_number, std::move(emf_file),
+                                      &scale_factor);
+  }
+
   Send(new ChromeUtilityHostMsg_RenderPDFPagesToMetafiles_PageDone(
       success, scale_factor));
 }
@@ -112,7 +129,7 @@ void PrintingHandler::OnRenderPDFPagesToMetafileStop() {
   ReleaseProcessIfNeeded();
 }
 
-#endif  // OS_WIN
+#endif  // defined(OS_WIN)
 
 #if BUILDFLAG(ENABLE_PRINT_PREVIEW)
 void PrintingHandler::OnRenderPDFPagesToPWGRaster(
@@ -130,7 +147,7 @@ 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 +202,30 @@ 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 +350,6 @@ void PrintingHandler::OnGetPrinterSemanticCapsAndDefaults(
   }
   ReleaseProcessIfNeeded();
 }
-#endif  // ENABLE_PRINT_PREVIEW
+#endif  // BUILDFLAG(ENABLE_PRINT_PREVIEW)
 
 }  // namespace printing