Implement CGdiPrinterDriver::DrawDeviceText().

public/fpdfview.h

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 // NOTE: External docs refer to this file as "fpdfview.h", so do not rename
 // despite lack of consistency with other public files.
 
 #ifndef PUBLIC_FPDFVIEW_H_
@@ skipping 193 matching lines @@
 //          Set the policy for the sandbox environment.
 // Parameters:
 //          policy -   The specified policy for setting, for example:
 //                     FPDF_POLICY_MACHINETIME_ACCESS.
 //          enable -   True to enable, false to disable the policy.
 // Return value:
 //          None.
 DLLEXPORT void STDCALL FPDF_SetSandBoxPolicy(FPDF_DWORD policy,
                                              FPDF_BOOL enable);
 
+#if defined(_WIN32) && defined(PDFIUM_PRINT_TEXT_WITH_GDI)
+// Pointer to a helper function to make |font| with |text| of |text_length|
+// accessible when printing text with GDI. This is useful in sandboxed
+// environments where PDFium's access to GDI may be restricted.
+typedef void (*PDFiumEnsureTypefaceCharactersAccessible)(const LOGFONT* font,
+                                                         const wchar_t* text,
+                                                         size_t text_length);
+
+// Function: FPDF_SetTypefaceAccessibleFunc
+//          Set the function pointer that makes GDI fonts available in sandboxed
+//          environments. Experimental API.
+// Parameters:
+//          func -   A function pointer. See description above.
+// Return value:
+//          None.
+DLLEXPORT void STDCALL
+FPDF_SetTypefaceAccessibleFunc(PDFiumEnsureTypefaceCharactersAccessible func);
+
+// Function: FPDF_SetPrintTextWithGDI
+//          Set whether to use GDI to draw fonts when printing on Windows.
+//          Experimental API.
+// Parameters:
+//          use_gdi -   Set to true to enable printing text with GDI.
+// Return value:
+//          None.
+DLLEXPORT void STDCALL FPDF_SetPrintTextWithGDI(FPDF_BOOL use_gdi);
+#endif
+
 // Function: FPDF_LoadDocument
 //          Open and load a PDF document.
 // Parameters:
 //          file_path -  Path to the PDF file (including extension).
 //          password  -  A string used as the password for the PDF file.
 //                       If no password is needed, empty or NULL can be used.
 // Return value:
 //          A handle to the loaded document, or NULL on failure.
 // Comments:
 //          Loaded document can be closed by FPDF_CloseDocument().
@@ skipping 717 matching lines @@
 // Function: FPDF_BStr_Clear
 //          Helper function to clear a byte string.
 DLLEXPORT FPDF_RESULT STDCALL FPDF_BStr_Clear(FPDF_BSTR* str);
 #endif  // PDF_ENABLE_XFA
 
 #ifdef __cplusplus
 }
 #endif
 
 #endif  // PUBLIC_FPDFVIEW_H_