Add a build target and a proper export header for shared library builds.

This CL adds support for Chromium's component build feature to pdfium.

The export header stub in fpdfview.h is expanded to match Chromium's
export mechanisms and patterns (fixes pdfium:825).

A component/shared library build can be triggered by adding

is_component_build = true

as a gn argument. Please note that setting this will also affect some
of pdfiums dependencies like v8, which will be build as components
too.

Additionally, this CL provides a "pdf_source_set" template which
dynamically enables the use of "source_set" when building a complete
static library or a shared library to reduce build time.

When testing this it is recommended to only build the pdfium target as
most of pdfiums test rely on non-public functions which aren't exported
by the shared library.

Bug: pdfium:825,pdfium:826
Change-Id: Icedc538ec535e11d1e53c4d5fabc8c064b275752
Reviewed-on: https://pdfium-review.googlesource.com/8970
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

1 files changed, 127 insertions, 117 deletions

diff --git a/public/fpdf_formfill.h b/public/fpdf_formfill.h
index 617bc34b17..6a90140097 100644
--- a/public/fpdf_formfill.h
+++ b/public/fpdf_formfill.h
@@ -1081,7 +1081,7 @@ typedef struct _FPDF_FORMFILLINFO {
  * Return Value:
  *          Return handler to the form fill module. NULL means fails.
  **/
-DLLEXPORT FPDF_FORMHANDLE STDCALL
+FPDF_EXPORT FPDF_FORMHANDLE FPDF_CALLCONV
 FPDFDOC_InitFormFillEnvironment(FPDF_DOCUMENT document,
                                 FPDF_FORMFILLINFO* formInfo);
 
@@ -1094,7 +1094,8 @@ FPDFDOC_InitFormFillEnvironment(FPDF_DOCUMENT document,
  * Return Value:
  *          NULL.
  **/
-DLLEXPORT void STDCALL FPDFDOC_ExitFormFillEnvironment(FPDF_FORMHANDLE hHandle);
+FPDF_EXPORT void FPDF_CALLCONV
+FPDFDOC_ExitFormFillEnvironment(FPDF_FORMHANDLE hHandle);
 
 /**
  * Function: FORM_OnAfterLoadPage
@@ -1108,8 +1109,8 @@ DLLEXPORT void STDCALL FPDFDOC_ExitFormFillEnvironment(FPDF_FORMHANDLE hHandle);
  * Return Value:
  *          NONE.
  **/
-DLLEXPORT void STDCALL FORM_OnAfterLoadPage(FPDF_PAGE page,
-                                            FPDF_FORMHANDLE hHandle);
+FPDF_EXPORT void FPDF_CALLCONV FORM_OnAfterLoadPage(FPDF_PAGE page,
+                                                    FPDF_FORMHANDLE hHandle);
 
 /**
  * Function: FORM_OnBeforeClosePage
@@ -1124,8 +1125,8 @@ DLLEXPORT void STDCALL FORM_OnAfterLoadPage(FPDF_PAGE page,
  * Return Value:
  *          NONE.
  **/
-DLLEXPORT void STDCALL FORM_OnBeforeClosePage(FPDF_PAGE page,
-                                              FPDF_FORMHANDLE hHandle);
+FPDF_EXPORT void FPDF_CALLCONV FORM_OnBeforeClosePage(FPDF_PAGE page,
+                                                      FPDF_FORMHANDLE hHandle);
 
 /**
 * Function: FORM_DoDocumentJSAction
@@ -1142,7 +1143,7 @@ DLLEXPORT void STDCALL FORM_OnBeforeClosePage(FPDF_PAGE page,
 *document, this method will execute the javascript action;
 *           otherwise, the method will do nothing.
 **/
-DLLEXPORT void STDCALL FORM_DoDocumentJSAction(FPDF_FORMHANDLE hHandle);
+FPDF_EXPORT void FPDF_CALLCONV FORM_DoDocumentJSAction(FPDF_FORMHANDLE hHandle);
 
 /**
 * Function: FORM_DoDocumentOpenAction
@@ -1157,7 +1158,8 @@ DLLEXPORT void STDCALL FORM_DoDocumentJSAction(FPDF_FORMHANDLE hHandle);
 *           This method will do nothing if there is no open-actions embedded in
 *the document.
 **/
-DLLEXPORT void STDCALL FORM_DoDocumentOpenAction(FPDF_FORMHANDLE hHandle);
+FPDF_EXPORT void FPDF_CALLCONV
+FORM_DoDocumentOpenAction(FPDF_FORMHANDLE hHandle);
 
 // additional actions type of document.
 #define FPDFDOC_AACTION_WC \
@@ -1187,8 +1189,8 @@ DLLEXPORT void STDCALL FORM_DoDocumentOpenAction(FPDF_FORMHANDLE hHandle);
 *additional-action corresponding to the specified aaType.
 **/
 
-DLLEXPORT void STDCALL FORM_DoDocumentAAction(FPDF_FORMHANDLE hHandle,
-                                              int aaType);
+FPDF_EXPORT void FPDF_CALLCONV FORM_DoDocumentAAction(FPDF_FORMHANDLE hHandle,
+                                                      int aaType);
 
 // Additional-action types of page object
 #define FPDFPAGE_AACTION_OPEN \
@@ -1213,9 +1215,9 @@ DLLEXPORT void STDCALL FORM_DoDocumentAAction(FPDF_FORMHANDLE hHandle,
 *           This method will do nothing if no additional-action corresponding to
 *the specified aaType exists.
 **/
-DLLEXPORT void STDCALL FORM_DoPageAAction(FPDF_PAGE page,
-                                          FPDF_FORMHANDLE hHandle,
-                                          int aaType);
+FPDF_EXPORT void FPDF_CALLCONV FORM_DoPageAAction(FPDF_PAGE page,
+                                                  FPDF_FORMHANDLE hHandle,
+                                                  int aaType);
 
 /**
  * Function: FORM_OnMouseMove
@@ -1233,11 +1235,11 @@ DLLEXPORT void STDCALL FORM_DoPageAAction(FPDF_PAGE page,
  * Return Value:
  *          TRUE indicates success; otherwise false.
  **/
-DLLEXPORT FPDF_BOOL STDCALL FORM_OnMouseMove(FPDF_FORMHANDLE hHandle,
-                                             FPDF_PAGE page,
-                                             int modifier,
-                                             double page_x,
-                                             double page_y);
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnMouseMove(FPDF_FORMHANDLE hHandle,
+                                                     FPDF_PAGE page,
+                                                     int modifier,
+                                                     double page_x,
+                                                     double page_y);
 
 /**
  * Function: FORM_OnLButtonDown
@@ -1256,11 +1258,11 @@ DLLEXPORT FPDF_BOOL STDCALL FORM_OnMouseMove(FPDF_FORMHANDLE hHandle,
  * Return Value:
  *          TRUE indicates success; otherwise false.
  **/
-DLLEXPORT FPDF_BOOL STDCALL FORM_OnLButtonDown(FPDF_FORMHANDLE hHandle,
-                                               FPDF_PAGE page,
-                                               int modifier,
-                                               double page_x,
-                                               double page_y);
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnLButtonDown(FPDF_FORMHANDLE hHandle,
+                                                       FPDF_PAGE page,
+                                                       int modifier,
+                                                       double page_x,
+                                                       double page_y);
 
 /**
  * Function: FORM_OnLButtonUp
@@ -1277,23 +1279,23 @@ DLLEXPORT FPDF_BOOL STDCALL FORM_OnLButtonDown(FPDF_FORMHANDLE hHandle,
  * Return Value:
  *          TRUE indicates success; otherwise false.
  **/
-DLLEXPORT FPDF_BOOL STDCALL FORM_OnLButtonUp(FPDF_FORMHANDLE hHandle,
-                                             FPDF_PAGE page,
-                                             int modifier,
-                                             double page_x,
-                                             double page_y);
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnLButtonUp(FPDF_FORMHANDLE hHandle,
+                                                     FPDF_PAGE page,
+                                                     int modifier,
+                                                     double page_x,
+                                                     double page_y);
 
 #ifdef PDF_ENABLE_XFA
-DLLEXPORT FPDF_BOOL STDCALL FORM_OnRButtonDown(FPDF_FORMHANDLE hHandle,
-                                               FPDF_PAGE page,
-                                               int modifier,
-                                               double page_x,
-                                               double page_y);
-DLLEXPORT FPDF_BOOL STDCALL FORM_OnRButtonUp(FPDF_FORMHANDLE hHandle,
-                                             FPDF_PAGE page,
-                                             int modifier,
-                                             double page_x,
-                                             double page_y);
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnRButtonDown(FPDF_FORMHANDLE hHandle,
+                                                       FPDF_PAGE page,
+                                                       int modifier,
+                                                       double page_x,
+                                                       double page_y);
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnRButtonUp(FPDF_FORMHANDLE hHandle,
+                                                     FPDF_PAGE page,
+                                                     int modifier,
+                                                     double page_x,
+                                                     double page_y);
 #endif  // PDF_ENABLE_XFA
 
 /**
@@ -1310,10 +1312,10 @@ DLLEXPORT FPDF_BOOL STDCALL FORM_OnRButtonUp(FPDF_FORMHANDLE hHandle,
  * Return Value:
  *          TRUE indicates success; otherwise false.
  **/
-DLLEXPORT FPDF_BOOL STDCALL FORM_OnKeyDown(FPDF_FORMHANDLE hHandle,
-                                           FPDF_PAGE page,
-                                           int nKeyCode,
-                                           int modifier);
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnKeyDown(FPDF_FORMHANDLE hHandle,
+                                                   FPDF_PAGE page,
+                                                   int nKeyCode,
+                                                   int modifier);
 
 /**
  * Function: FORM_OnKeyUp
@@ -1329,10 +1331,10 @@ DLLEXPORT FPDF_BOOL STDCALL FORM_OnKeyDown(FPDF_FORMHANDLE hHandle,
  * Return Value:
  *          TRUE indicates success; otherwise false.
  **/
-DLLEXPORT FPDF_BOOL STDCALL FORM_OnKeyUp(FPDF_FORMHANDLE hHandle,
-                                         FPDF_PAGE page,
-                                         int nKeyCode,
-                                         int modifier);
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnKeyUp(FPDF_FORMHANDLE hHandle,
+                                                 FPDF_PAGE page,
+                                                 int nKeyCode,
+                                                 int modifier);
 
 /**
  * Function: FORM_OnChar
@@ -1349,10 +1351,10 @@ DLLEXPORT FPDF_BOOL STDCALL FORM_OnKeyUp(FPDF_FORMHANDLE hHandle,
  * Return Value:
  *          TRUE indicates success; otherwise false.
  **/
-DLLEXPORT FPDF_BOOL STDCALL FORM_OnChar(FPDF_FORMHANDLE hHandle,
-                                        FPDF_PAGE page,
-                                        int nChar,
-                                        int modifier);
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnChar(FPDF_FORMHANDLE hHandle,
+                                                FPDF_PAGE page,
+                                                int nChar,
+                                                int modifier);
 
 /**
  * Function: FORM_GetSelectedText
@@ -1372,10 +1374,11 @@ DLLEXPORT FPDF_BOOL STDCALL FORM_OnChar(FPDF_FORMHANDLE hHandle,
  *          Length in bytes of selected text in form text field or form combobox
  *          text field.
  **/
-DLLEXPORT unsigned long STDCALL FORM_GetSelectedText(FPDF_FORMHANDLE hHandle,
-                                                     FPDF_PAGE page,
-                                                     void* buffer,
-                                                     unsigned long buflen);
+FPDF_EXPORT unsigned long FPDF_CALLCONV
+FORM_GetSelectedText(FPDF_FORMHANDLE hHandle,
+                     FPDF_PAGE page,
+                     void* buffer,
+                     unsigned long buflen);
 
 /**
  * Function: FORM_ReplaceSelection
@@ -1393,9 +1396,9 @@ DLLEXPORT unsigned long STDCALL FORM_GetSelectedText(FPDF_FORMHANDLE hHandle,
  * Return Value:
  *          None.
  **/
-DLLEXPORT void STDCALL FORM_ReplaceSelection(FPDF_FORMHANDLE hHandle,
-                                             FPDF_PAGE page,
-                                             FPDF_WIDESTRING wsText);
+FPDF_EXPORT void FPDF_CALLCONV FORM_ReplaceSelection(FPDF_FORMHANDLE hHandle,
+                                                     FPDF_PAGE page,
+                                                     FPDF_WIDESTRING wsText);
 
 /**
  * Function: FORM_ForceToKillFocus.
@@ -1409,7 +1412,8 @@ DLLEXPORT void STDCALL FORM_ReplaceSelection(FPDF_FORMHANDLE hHandle,
  * Return Value:
  *          TRUE indicates success; otherwise false.
  **/
-DLLEXPORT FPDF_BOOL STDCALL FORM_ForceToKillFocus(FPDF_FORMHANDLE hHandle);
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
+FORM_ForceToKillFocus(FPDF_FORMHANDLE hHandle);
 
 // Field Types
 #define FPDF_FORMFIELD_UNKNOWN 0      // Unknown.
@@ -1436,10 +1440,11 @@ DLLEXPORT FPDF_BOOL STDCALL FORM_ForceToKillFocus(FPDF_FORMHANDLE hHandle);
  *     Return the type of the form field; -1 indicates no field.
  *     See field types above.
  **/
-DLLEXPORT int STDCALL FPDFPage_HasFormFieldAtPoint(FPDF_FORMHANDLE hHandle,
-                                                   FPDF_PAGE page,
-                                                   double page_x,
-                                                   double page_y);
+FPDF_EXPORT int FPDF_CALLCONV
+FPDFPage_HasFormFieldAtPoint(FPDF_FORMHANDLE hHandle,
+                             FPDF_PAGE page,
+                             double page_x,
+                             double page_y);
 
 /**
  * Function: FPDFPage_FormFieldZOrderAtPoint
@@ -1454,10 +1459,11 @@ DLLEXPORT int STDCALL FPDFPage_HasFormFieldAtPoint(FPDF_FORMHANDLE hHandle,
  *     Return the z-order of the form field; -1 indicates no field.
  *     Higher numbers are closer to the front.
  **/
-DLLEXPORT int STDCALL FPDFPage_FormFieldZOrderAtPoint(FPDF_FORMHANDLE hHandle,
-                                                      FPDF_PAGE page,
-                                                      double page_x,
-                                                      double page_y);
+FPDF_EXPORT int FPDF_CALLCONV
+FPDFPage_FormFieldZOrderAtPoint(FPDF_FORMHANDLE hHandle,
+                                FPDF_PAGE page,
+                                double page_x,
+                                double page_y);
 
 /**
  * Function: FPDF_SetFormFieldHighlightColor
@@ -1481,9 +1487,10 @@ DLLEXPORT int STDCALL FPDFPage_FormFieldZOrderAtPoint(FPDF_FORMHANDLE hHandle,
  *          Please refresh the client window to show the highlight immediately
  *if necessary.
  **/
-DLLEXPORT void STDCALL FPDF_SetFormFieldHighlightColor(FPDF_FORMHANDLE hHandle,
-                                                       int fieldType,
-                                                       unsigned long color);
+FPDF_EXPORT void FPDF_CALLCONV
+FPDF_SetFormFieldHighlightColor(FPDF_FORMHANDLE hHandle,
+                                int fieldType,
+                                unsigned long color);
 
 /**
  * Function: FPDF_SetFormFieldHighlightAlpha
@@ -1499,8 +1506,8 @@ DLLEXPORT void STDCALL FPDF_SetFormFieldHighlightColor(FPDF_FORMHANDLE hHandle,
  * Return Value:
  *          NONE.
  **/
-DLLEXPORT void STDCALL FPDF_SetFormFieldHighlightAlpha(FPDF_FORMHANDLE hHandle,
-                                                       unsigned char alpha);
+FPDF_EXPORT void FPDF_CALLCONV
+FPDF_SetFormFieldHighlightAlpha(FPDF_FORMHANDLE hHandle, unsigned char alpha);
 
 /**
  * Function: FPDF_RemoveFormFieldHighlight
@@ -1514,7 +1521,8 @@ DLLEXPORT void STDCALL FPDF_SetFormFieldHighlightAlpha(FPDF_FORMHANDLE hHandle,
  *          Please refresh the client window to remove the highlight immediately
  *if necessary.
  **/
-DLLEXPORT void STDCALL FPDF_RemoveFormFieldHighlight(FPDF_FORMHANDLE hHandle);
+FPDF_EXPORT void FPDF_CALLCONV
+FPDF_RemoveFormFieldHighlight(FPDF_FORMHANDLE hHandle);
 
 /**
 * Function: FPDF_FFLDraw
@@ -1554,26 +1562,26 @@ DLLEXPORT void STDCALL FPDF_RemoveFormFieldHighlight(FPDF_FORMHANDLE hHandle);
 *call this function after rendering functions, such as FPDF_RenderPageBitmap or
 *FPDF_RenderPageBitmap_Start, finish rendering the page contents.
 **/
-DLLEXPORT void STDCALL FPDF_FFLDraw(FPDF_FORMHANDLE hHandle,
-                                    FPDF_BITMAP bitmap,
-                                    FPDF_PAGE page,
-                                    int start_x,
-                                    int start_y,
-                                    int size_x,
-                                    int size_y,
-                                    int rotate,
-                                    int flags);
+FPDF_EXPORT void FPDF_CALLCONV FPDF_FFLDraw(FPDF_FORMHANDLE hHandle,
+                                            FPDF_BITMAP bitmap,
+                                            FPDF_PAGE page,
+                                            int start_x,
+                                            int start_y,
+                                            int size_x,
+                                            int size_y,
+                                            int rotate,
+                                            int flags);
 
 #ifdef _SKIA_SUPPORT_
-DLLEXPORT void STDCALL FPDF_FFLRecord(FPDF_FORMHANDLE hHandle,
-                                      FPDF_RECORDER recorder,
-                                      FPDF_PAGE page,
-                                      int start_x,
-                                      int start_y,
-                                      int size_x,
-                                      int size_y,
-                                      int rotate,
-                                      int flags);
+FPDF_EXPORT void FPDF_CALLCONV FPDF_FFLRecord(FPDF_FORMHANDLE hHandle,
+                                              FPDF_RECORDER recorder,
+                                              FPDF_PAGE page,
+                                              int start_x,
+                                              int start_y,
+                                              int size_x,
+                                              int size_y,
+                                              int rotate,
+                                              int flags);
 #endif
 
 #ifdef PDF_ENABLE_XFA
@@ -1590,8 +1598,8 @@ DLLEXPORT void STDCALL FPDF_FFLRecord(FPDF_FORMHANDLE hHandle,
  *                      TRUE indicates that the input document has XFA fields,
  *otherwise FALSE.
  **/
-DLLEXPORT FPDF_BOOL STDCALL FPDF_HasXFAField(FPDF_DOCUMENT document,
-                                             int* docType);
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_HasXFAField(FPDF_DOCUMENT document,
+                                                     int* docType);
 
 /**
  * Function: FPDF_LoadXFA
@@ -1603,7 +1611,7 @@ DLLEXPORT FPDF_BOOL STDCALL FPDF_HasXFAField(FPDF_DOCUMENT document,
  * Return Value:
  *          TRUE indicates success,otherwise FALSE.
  **/
-DLLEXPORT FPDF_BOOL STDCALL FPDF_LoadXFA(FPDF_DOCUMENT document);
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_LoadXFA(FPDF_DOCUMENT document);
 
 /**
  * Function: FPDF_Widget_Undo
@@ -1616,8 +1624,8 @@ DLLEXPORT FPDF_BOOL STDCALL FPDF_LoadXFA(FPDF_DOCUMENT document);
  * Return Value:
  *          None.
  **/
-DLLEXPORT void STDCALL FPDF_Widget_Undo(FPDF_DOCUMENT document,
-                                        FPDF_WIDGET hWidget);
+FPDF_EXPORT void FPDF_CALLCONV FPDF_Widget_Undo(FPDF_DOCUMENT document,
+                                                FPDF_WIDGET hWidget);
 /**
  * Function: FPDF_Widget_Redo
  *          This method will implement the redo feature for the specified xfa
@@ -1629,8 +1637,8 @@ DLLEXPORT void STDCALL FPDF_Widget_Undo(FPDF_DOCUMENT document,
  * Return Value:
  *          None.
  **/
-DLLEXPORT void STDCALL FPDF_Widget_Redo(FPDF_DOCUMENT document,
-                                        FPDF_WIDGET hWidget);
+FPDF_EXPORT void FPDF_CALLCONV FPDF_Widget_Redo(FPDF_DOCUMENT document,
+                                                FPDF_WIDGET hWidget);
 /**
  * Function: FPDF_Widget_SelectAll
  *          This method will implement the select all feature for the specified
@@ -1642,8 +1650,8 @@ DLLEXPORT void STDCALL FPDF_Widget_Redo(FPDF_DOCUMENT document,
  * Return Value:
  *          None.
  **/
-DLLEXPORT void STDCALL FPDF_Widget_SelectAll(FPDF_DOCUMENT document,
-                                             FPDF_WIDGET hWidget);
+FPDF_EXPORT void FPDF_CALLCONV FPDF_Widget_SelectAll(FPDF_DOCUMENT document,
+                                                     FPDF_WIDGET hWidget);
 /**
  * Function: FPDF_Widget_Copy
  *          This method will implement the copy feature for the specified xfa
@@ -1658,10 +1666,10 @@ DLLEXPORT void STDCALL FPDF_Widget_SelectAll(FPDF_DOCUMENT document,
  * Return Value:
  *          None.
  **/
-DLLEXPORT void STDCALL FPDF_Widget_Copy(FPDF_DOCUMENT document,
-                                        FPDF_WIDGET hWidget,
-                                        FPDF_WIDESTRING wsText,
-                                        FPDF_DWORD* size);
+FPDF_EXPORT void FPDF_CALLCONV FPDF_Widget_Copy(FPDF_DOCUMENT document,
+                                                FPDF_WIDGET hWidget,
+                                                FPDF_WIDESTRING wsText,
+                                                FPDF_DWORD* size);
 /**
  * Function: FPDF_Widget_Cut
  *          This method will implement the cut feature for the specified xfa
@@ -1676,10 +1684,10 @@ DLLEXPORT void STDCALL FPDF_Widget_Copy(FPDF_DOCUMENT document,
  * Return Value:
  *          None.
  **/
-DLLEXPORT void STDCALL FPDF_Widget_Cut(FPDF_DOCUMENT document,
-                                       FPDF_WIDGET hWidget,
-                                       FPDF_WIDESTRING wsText,
-                                       FPDF_DWORD* size);
+FPDF_EXPORT void FPDF_CALLCONV FPDF_Widget_Cut(FPDF_DOCUMENT document,
+                                               FPDF_WIDGET hWidget,
+                                               FPDF_WIDESTRING wsText,
+                                               FPDF_DWORD* size);
 /**
  * Function: FPDF_Widget_Paste
  *          This method will implement the paste feature for the specified xfa
@@ -1693,10 +1701,10 @@ DLLEXPORT void STDCALL FPDF_Widget_Cut(FPDF_DOCUMENT document,
  * Return Value:
  *          None.
  **/
-DLLEXPORT void STDCALL FPDF_Widget_Paste(FPDF_DOCUMENT document,
-                                         FPDF_WIDGET hWidget,
-                                         FPDF_WIDESTRING wsText,
-                                         FPDF_DWORD size);
+FPDF_EXPORT void FPDF_CALLCONV FPDF_Widget_Paste(FPDF_DOCUMENT document,
+                                                 FPDF_WIDGET hWidget,
+                                                 FPDF_WIDESTRING wsText,
+                                                 FPDF_DWORD size);
 /**
  * Function: FPDF_Widget_ReplaceSpellCheckWord
  *          This method will implement the spell check feature for the specified
@@ -1712,7 +1720,7 @@ DLLEXPORT void STDCALL FPDF_Widget_Paste(FPDF_DOCUMENT document,
  * Return Value:
  *          None.
  **/
-DLLEXPORT void STDCALL
+FPDF_EXPORT void FPDF_CALLCONV
 FPDF_Widget_ReplaceSpellCheckWord(FPDF_DOCUMENT document,
                                   FPDF_WIDGET hWidget,
                                   float x,
@@ -1734,7 +1742,7 @@ FPDF_Widget_ReplaceSpellCheckWord(FPDF_DOCUMENT document,
  * Return Value:
  *          None.
  **/
-DLLEXPORT void STDCALL
+FPDF_EXPORT void FPDF_CALLCONV
 FPDF_Widget_GetSpellCheckWords(FPDF_DOCUMENT document,
                                FPDF_WIDGET hWidget,
                                float x,
@@ -1748,7 +1756,8 @@ FPDF_Widget_GetSpellCheckWords(FPDF_DOCUMENT document,
  * Return Value:
  *          None.
  **/
-DLLEXPORT int STDCALL FPDF_StringHandleCounts(FPDF_STRINGHANDLE stringHandle);
+FPDF_EXPORT int FPDF_CALLCONV
+FPDF_StringHandleCounts(FPDF_STRINGHANDLE stringHandle);
 /**
  * Function: FPDF_StringHandleGetStringByIndex
  *          This method will get the specified index of the text buffer.
@@ -1761,7 +1770,7 @@ DLLEXPORT int STDCALL FPDF_StringHandleCounts(FPDF_STRINGHANDLE stringHandle);
  * Return Value:
  *          TRUE indicates success, otherwise FALSE.
  **/
-DLLEXPORT FPDF_BOOL STDCALL
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
 FPDF_StringHandleGetStringByIndex(FPDF_STRINGHANDLE stringHandle,
                                   int index,
                                   FPDF_BYTESTRING bsText,
@@ -1774,7 +1783,8 @@ FPDF_StringHandleGetStringByIndex(FPDF_STRINGHANDLE stringHandle,
  * Return Value:
  *          None.
  **/
-DLLEXPORT void STDCALL FPDF_StringHandleRelease(FPDF_STRINGHANDLE stringHandle);
+FPDF_EXPORT void FPDF_CALLCONV
+FPDF_StringHandleRelease(FPDF_STRINGHANDLE stringHandle);
 /**
  * Function: FPDF_StringHandleAddString
  *          This method will add the specified text buffer.
@@ -1786,7 +1796,7 @@ DLLEXPORT void STDCALL FPDF_StringHandleRelease(FPDF_STRINGHANDLE stringHandle);
  * Return Value:
  *          TRUE indicates success, otherwise FALSE.
  **/
-DLLEXPORT FPDF_BOOL STDCALL
+FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
 FPDF_StringHandleAddString(FPDF_STRINGHANDLE stringHandle,
                            FPDF_BYTESTRING bsText,
                            FPDF_DWORD size);