Printing: Load the source PDF only once.

pdf/pdf.cc

 // Copyright (c) 2010 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 "pdf/pdf.h"
 
 #include <stdint.h>
 
 #if defined(OS_WIN)
 #include <windows.h>
@@ skipping 64 matching lines @@
   delete pp::Module::Get();
   pp::InternalSetModuleSingleton(nullptr);
 }
 
 const void* PPP_GetInterface(const char* interface_name) {
   auto* module = pp::Module::Get();
   return module ? module->GetPluginInterface(interface_name) : nullptr;
 }
 
 #if defined(OS_WIN)
-bool RenderPDFPageToDC(const void* pdf_buffer,
-                       int buffer_size,
+bool RenderPDFPageToDC(void* pdf_handle,
                        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 (!g_sdk_initialized_via_pepper) {
     if (!InitializeSDK()) {
       return false;
     }
   }
   PDFEngineExports* engine_exports = PDFEngineExports::Get();
   PDFEngineExports::RenderingSettings settings(
       dpi, dpi,
       pp::Rect(bounds_origin_x, bounds_origin_y, bounds_width, bounds_height),
       fit_to_bounds, stretch_to_bounds, keep_aspect_ratio, center_in_bounds,
       autorotate);
-  bool ret = engine_exports->RenderPDFPageToDC(pdf_buffer, buffer_size,
-                                               page_number, settings, dc);
+  bool ret =
+      engine_exports->RenderPDFPageToDC(pdf_handle, page_number, settings, dc);
   if (!g_sdk_initialized_via_pepper)
     ShutdownSDK();
 
   return ret;
 }
 
 void SetPDFEnsureTypefaceCharactersAccessible(
     PDFEnsureTypefaceCharactersAccessible func) {
   PDFEngineExports::Get()->SetPDFEnsureTypefaceCharactersAccessible(func);
 }
 
 void SetPDFUseGDIPrinting(bool enable) {
   PDFEngineExports::Get()->SetPDFUseGDIPrinting(enable);
 }
 #endif  // defined(OS_WIN)
 
 bool GetPDFDocInfo(const void* pdf_buffer,
-                   int buffer_size, int* page_count,
-                   double* max_page_width) {
+                   int buffer_size,
+                   int* page_count,
+                   double* max_page_width,
+                   void** pdf_handle) {
   if (!g_sdk_initialized_via_pepper) {
     if (!InitializeSDK())
       return false;
   }
   PDFEngineExports* engine_exports = PDFEngineExports::Get();
-  bool ret = engine_exports->GetPDFDocInfo(
-      pdf_buffer, buffer_size, page_count, max_page_width);
+  bool ret = engine_exports->GetPDFDocInfo(pdf_buffer, buffer_size, page_count,
+                                           max_page_width, pdf_handle);
   if (!g_sdk_initialized_via_pepper)
     ShutdownSDK();
 
   return ret;
 }
 
-bool GetPDFPageSizeByIndex(const void* pdf_buffer,
-                           int pdf_buffer_size, int page_number,
-                           double* width, double* height) {
+void ReleasePDFHandle(void* pdf_handle) {
   if (!g_sdk_initialized_via_pepper) {
-    if (!chrome_pdf::InitializeSDK())
+    if (!InitializeSDK())
+      return;
+  }
+  PDFEngineExports* engine_exports = PDFEngineExports::Get();
+  engine_exports->ReleasePDFHandle(pdf_handle);
+  if (!g_sdk_initialized_via_pepper)
+    ShutdownSDK();
+}
+
+bool GetPDFPageSizeByIndex(void* pdf_handle,
+                           int page_number,
+                           double* width,
+                           double* height) {
+  if (!g_sdk_initialized_via_pepper) {
+    if (!InitializeSDK())
       return false;
   }
-  chrome_pdf::PDFEngineExports* engine_exports =
-      chrome_pdf::PDFEngineExports::Get();
-  bool ret = engine_exports->GetPDFPageSizeByIndex(
-      pdf_buffer, pdf_buffer_size, page_number, width, height);
+  PDFEngineExports* engine_exports = PDFEngineExports::Get();
+  bool ret = engine_exports->GetPDFPageSizeByIndex(pdf_handle, page_number,
+                                                   width, height);
   if (!g_sdk_initialized_via_pepper)
-    chrome_pdf::ShutdownSDK();
+    ShutdownSDK();
   return ret;
 }
 
-bool RenderPDFPageToBitmap(const void* pdf_buffer,
-                           int pdf_buffer_size,
+bool RenderPDFPageToBitmap(void* pdf_handle,
                            int page_number,
                            void* bitmap_buffer,
                            int bitmap_width,
                            int bitmap_height,
                            int dpi,
                            bool autorotate) {
   if (!g_sdk_initialized_via_pepper) {
     if (!InitializeSDK())
       return false;
   }
   PDFEngineExports* engine_exports = PDFEngineExports::Get();
   PDFEngineExports::RenderingSettings settings(
       dpi, dpi, pp::Rect(bitmap_width, bitmap_height), true, false, true, true,
       autorotate);
-  bool ret = engine_exports->RenderPDFPageToBitmap(
-      pdf_buffer, pdf_buffer_size, page_number, settings, bitmap_buffer);
+  bool ret = engine_exports->RenderPDFPageToBitmap(pdf_handle, page_number,
+                                                   settings, bitmap_buffer);
   if (!g_sdk_initialized_via_pepper)
     ShutdownSDK();
 
   return ret;
 }
 
 }  // namespace chrome_pdf