Better error from pdfium_test when page too big to render.
[pdfium.git] / fpdfsdk / src / fpdfview.cpp
index 49dabe3..3c0e010 100644 (file)
@@ -5,11 +5,14 @@
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "../include/fsdk_define.h"
+#include "../include/fsdk_mgr.h"
 #include "../include/fpdfview.h"
 #include "../include/fsdk_rendercontext.h"
 #include "../include/fpdf_progressive.h"
 #include "../include/fpdf_ext.h"
-#include "../../third_party/numerics/safe_conversions_impl.h"
+#include "../../../core/src/fxcrt/fx_safe_types.h"
+#include "../../third_party/base/nonstd_unique_ptr.h"
+#include "../../third_party/base/numerics/safe_conversions_impl.h"
 
 CPDF_CustomAccess::CPDF_CustomAccess(FPDF_FILEACCESS* pFileAccess)
 {
@@ -22,7 +25,7 @@ FX_BOOL CPDF_CustomAccess::ReadBlock(void* buffer, FX_FILESIZE offset, size_t si
     if (offset < 0) {
         return FALSE;
     }
-    FX_SAFE_FILESIZE newPos = base::checked_cast<FX_FILESIZE, size_t>(size);
+    FX_SAFE_FILESIZE newPos = pdfium::base::checked_cast<FX_FILESIZE, size_t>(size);
     newPos += offset;
     if (!newPos.IsValid() || newPos.ValueOrDie() > m_FileAccess.m_FileLen) {
         return FALSE;
@@ -105,40 +108,8 @@ public:
 CFontMapper* g_pFontMapper = NULL;
 #endif         // #if _FX_OS_ == _FX_LINUX_EMBEDDED_
 
-DLLEXPORT void STDCALL FPDF_InitLibrary(FX_LPVOID hInstance)
+DLLEXPORT void STDCALL FPDF_InitLibrary()
 {
-#ifdef API5
-       CPDF_ModuleMgr::Create();
-       g_pModuleMgr = CPDF_ModuleMgr::Get();
-        #if _FX_OS_ == _FX_WIN32_MOBILE_ || _FX_OS_ == _FX_LINUX_EMBEDDED_
-               g_pModuleMgr->InitEmbedded();
-        #ifdef _GB1_CMAPS_
-               g_pModuleMgr->LoadEmbeddedGB1CMaps();
-        #endif
-        #ifdef _GB1_CMAPS_4_
-               g_pModuleMgr->LoadEmbeddedGB1CMaps_4();
-        #endif
-        #ifdef _CNS1_CMAPS_
-               g_pModuleMgr->LoadEmbeddedCNS1CMaps();
-        #endif
-        #ifdef _JAPAN1_CMAPS_
-               g_pModuleMgr->LoadEmbeddedJapan1CMaps();
-        #endif
-        #ifdef _JAPAN1_CMAPS_6_
-               g_pModuleMgr->LoadEmbeddedJapan1CMaps_6();
-        #endif
-        #ifdef _KOREA1_CMAPS_
-               g_pModuleMgr->LoadEmbeddedKorea1CMaps();
-        #endif
-        #ifdef _JPX_DECODER_
-               g_pModuleMgr->InitJpxModule();
-               g_pModuleMgr->InitJbig2Module();
-        //     g_pModuleMgr->InitIccModule();
-        #endif
-        #else
-               g_pModuleMgr->InitDesktop();
-        #endif
-#else
        g_pCodecModule = CCodec_ModuleMgr::Create();
        
        CFX_GEModule::Create();
@@ -148,7 +119,6 @@ DLLEXPORT void STDCALL FPDF_InitLibrary(FX_LPVOID hInstance)
        CPDF_ModuleMgr::Get()->SetCodecModule(g_pCodecModule);
        CPDF_ModuleMgr::Get()->InitPageModule();
        CPDF_ModuleMgr::Get()->InitRenderModule();
-#ifdef FOXIT_CHROME_BUILD
        CPDF_ModuleMgr * pModuleMgr = CPDF_ModuleMgr::Get();
        if ( pModuleMgr )
        {
@@ -157,30 +127,6 @@ DLLEXPORT void STDCALL FPDF_InitLibrary(FX_LPVOID hInstance)
                pModuleMgr->LoadEmbeddedCNS1CMaps();
                pModuleMgr->LoadEmbeddedKorea1CMaps();
        }
-#endif 
-#endif
-
-#ifdef _WIN32
-       // Get module path
-       TCHAR app_path[MAX_PATH];
-       ::GetModuleFileName((HINSTANCE)hInstance, app_path, MAX_PATH);
-       size_t len = _tcslen(app_path);
-       for (size_t i = len; i >= 0; i --)
-               if (app_path[i] == '\\') {
-                       app_path[i] = 0;
-                       break;
-               }
-               
-#ifdef _UNICODE
-               #ifndef _FXSDK_OPENSOURCE_
-               CPDF_ModuleMgr::Get()->SetModulePath(NULL, CFX_ByteString::FromUnicode(app_path));
-               #endif
-#else
-#ifndef _FXSDK_OPENSOURCE_
-               CPDF_ModuleMgr::Get()->SetModulePath(NULL, app_path);
-#endif
-#endif
-#endif
 }
 
 
@@ -197,11 +143,6 @@ DLLEXPORT void STDCALL FPDF_DestroyLibrary()
        CFX_GEModule::Destroy();
        g_pCodecModule->Destroy();
 #endif
-#ifndef _FXSDK_OPENSOURCE_
-       FXMEM_CollectAll(FXMEM_GetDefaultMgr());
-#else
-
-#endif
 }
 
 #ifndef _WIN32
@@ -244,7 +185,7 @@ DLLEXPORT void      STDCALL FPDF_SetSandBoxPolicy(FPDF_DWORD policy, FPDF_BOOL enable
 
 DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_LoadDocument(FPDF_STRING file_path, FPDF_BYTESTRING password)
 {
-       CPDF_Parser* pParser = FX_NEW CPDF_Parser;
+       CPDF_Parser* pParser = new CPDF_Parser;
        pParser->SetPassword(password);
 
        FX_DWORD err_code = pParser->StartParse((FX_LPCSTR)file_path);
@@ -258,7 +199,7 @@ DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_LoadDocument(FPDF_STRING file_path, FPDF_BY
 
 extern void CheckUnSupportError(CPDF_Document * pDoc, FX_DWORD err_code);
 
-class CMemFile FX_FINAL: public IFX_FileRead, public CFX_Object
+class CMemFile FX_FINAL: public IFX_FileRead
 {
 public:
        CMemFile(FX_BYTE* pBuf, FX_FILESIZE size):m_pBuf(pBuf),m_size(size) {}
@@ -270,7 +211,7 @@ public:
             if (offset < 0) {
                 return FALSE;
             }
-            FX_SAFE_FILESIZE newPos = base::checked_cast<FX_FILESIZE, size_t>(size);
+            FX_SAFE_FILESIZE newPos = pdfium::base::checked_cast<FX_FILESIZE, size_t>(size);
             newPos += offset;
             if (!newPos.IsValid() || newPos.ValueOrDie() > (FX_DWORD)m_size) {
                 return FALSE;
@@ -284,9 +225,9 @@ private:
 };
 DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_LoadMemDocument(const void* data_buf, int size, FPDF_BYTESTRING password)
 {
-       CPDF_Parser* pParser = FX_NEW CPDF_Parser;
+       CPDF_Parser* pParser = new CPDF_Parser;
        pParser->SetPassword(password);
-       CMemFile* pMemFile = FX_NEW CMemFile((FX_BYTE*)data_buf, size);
+       CMemFile* pMemFile = new CMemFile((FX_BYTE*)data_buf, size);
        FX_DWORD err_code = pParser->StartParse(pMemFile);
        if (err_code) {
                delete pParser;
@@ -301,9 +242,9 @@ DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_LoadMemDocument(const void* data_buf, int s
 
 DLLEXPORT FPDF_DOCUMENT STDCALL FPDF_LoadCustomDocument(FPDF_FILEACCESS* pFileAccess, FPDF_BYTESTRING password)
 {
-       CPDF_Parser* pParser = FX_NEW CPDF_Parser;
+       CPDF_Parser* pParser = new CPDF_Parser;
        pParser->SetPassword(password);
-       CPDF_CustomAccess* pFile = FX_NEW CPDF_CustomAccess(pFileAccess);
+       CPDF_CustomAccess* pFile = new CPDF_CustomAccess(pFileAccess);
        FX_DWORD err_code = pParser->StartParse(pFile);
        if (err_code) {
                delete pParser;
@@ -361,17 +302,14 @@ DLLEXPORT FPDF_PAGE STDCALL FPDF_LoadPage(FPDF_DOCUMENT document, int page_index
 {
        if (document == NULL) return NULL;
        if (page_index < 0 || page_index >= FPDF_GetPageCount(document)) return NULL;
-//     CPDF_Parser* pParser = (CPDF_Parser*)document;
+
        CPDF_Document* pDoc = (CPDF_Document*)document;
        if (pDoc == NULL) return NULL;
        CPDF_Dictionary* pDict = pDoc->GetPage(page_index);
        if (pDict == NULL) return NULL;
-       CPDF_Page* pPage = FX_NEW CPDF_Page;
+       CPDF_Page* pPage = new CPDF_Page;
        pPage->Load(pDoc, pDict);
        pPage->ParseContent();
-       
-//     CheckUnSupportError(pDoc, 0);
-
        return pPage;
 }
 
@@ -409,7 +347,7 @@ DLLEXPORT void STDCALL FPDF_RenderPage(HDC dc, FPDF_PAGE page, int start_x, int
        if (page==NULL) return;
        CPDF_Page* pPage = (CPDF_Page*)page;
 
-       CRenderContext* pContext = FX_NEW CRenderContext;
+       CRenderContext* pContext = new CRenderContext;
        pPage->SetPrivateData((void*)1, pContext, DropContext);
 
 #ifndef _WIN32_WCE
@@ -419,19 +357,19 @@ DLLEXPORT void STDCALL FPDF_RenderPage(HDC dc, FPDF_PAGE page, int start_x, int
        if (bBackgroundAlphaNeeded)
        {
                
-               pBitmap = FX_NEW CFX_DIBitmap;
+               pBitmap = new CFX_DIBitmap;
                pBitmap->Create(size_x, size_y, FXDIB_Argb);
                pBitmap->Clear(0x00ffffff);
 #ifdef _SKIA_SUPPORT_
-               pContext->m_pDevice = FX_NEW CFX_SkiaDevice;
+               pContext->m_pDevice = new CFX_SkiaDevice;
                ((CFX_SkiaDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)pBitmap);
 #else
-               pContext->m_pDevice = FX_NEW CFX_FxgeDevice;
+               pContext->m_pDevice = new CFX_FxgeDevice;
                ((CFX_FxgeDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)pBitmap);
 #endif
        }
        else
-           pContext->m_pDevice = FX_NEW CFX_WindowsDevice(dc);
+           pContext->m_pDevice = new CFX_WindowsDevice(dc);
 
        Func_RenderPage(pContext, page, start_x, start_y, size_x, size_y, rotate, flags,TRUE,NULL);
 
@@ -443,10 +381,11 @@ DLLEXPORT void STDCALL FPDF_RenderPage(HDC dc, FPDF_PAGE page, int start_x, int
                        
                        if (WinDC.GetDeviceCaps(FXDC_DEVICE_CLASS) == FXDC_PRINTER)
                        {
-                               CFX_DIBitmap* pDst = FX_NEW CFX_DIBitmap;
-                               pDst->Create(pBitmap->GetWidth(), pBitmap->GetHeight(),FXDIB_Rgb32);
-                               FXSYS_memcpy(pDst->GetBuffer(), pBitmap->GetBuffer(), pBitmap->GetPitch()*pBitmap->GetHeight());
-//                             WinDC.SetDIBits(pDst,0,0);
+                               CFX_DIBitmap* pDst = new CFX_DIBitmap;
+                               int pitch = pBitmap->GetPitch();
+                               pDst->Create(size_x, size_y, FXDIB_Rgb32);
+                               FXSYS_memset(pDst->GetBuffer(), -1, pitch*size_y);
+                               pDst->CompositeBitmap(0, 0, size_x, size_y, pBitmap, 0, 0, FXDIB_BLEND_NORMAL, NULL, FALSE, NULL);
                                WinDC.StretchDIBits(pDst,0,0,size_x,size_y);
                                delete pDst;
                        }
@@ -470,7 +409,8 @@ DLLEXPORT void STDCALL FPDF_RenderPage(HDC dc, FPDF_PAGE page, int start_x, int
 #ifdef DEBUG_TRACE
        {
                char str[128];
-               sprintf(str, "Rendering DIB %d x %d", width, height);
+               memset(str, 0, sizeof(str));
+               FXSYS_snprintf(str, sizeof(str) - 1, "Rendering DIB %d x %d", width, height);
                CPDF_ModuleMgr::Get()->ReportError(999, str);
        }
 #endif
@@ -488,7 +428,8 @@ DLLEXPORT void STDCALL FPDF_RenderPage(HDC dc, FPDF_PAGE page, int start_x, int
        if (pContext->m_hBitmap == NULL) {
 #if defined(DEBUG) || defined(_DEBUG)
                char str[128];
-               sprintf(str, "Error CreateDIBSection: %d x %d, error code = %d", width, height, GetLastError());
+               memset(str, 0, sizeof(str));
+               FXSYS_snprintf(str, sizeof(str) - 1, "Error CreateDIBSection: %d x %d, error code = %d", width, height, GetLastError());
                CPDF_ModuleMgr::Get()->ReportError(FPDFERR_OUT_OF_MEMORY, str);
 #else
                CPDF_ModuleMgr::Get()->ReportError(FPDFERR_OUT_OF_MEMORY, NULL);
@@ -503,11 +444,11 @@ DLLEXPORT void STDCALL FPDF_RenderPage(HDC dc, FPDF_PAGE page, int start_x, int
 #endif
 
        // Create a device with this external buffer
-       pContext->m_pBitmap = FX_NEW CFX_DIBitmap;
+       pContext->m_pBitmap = new CFX_DIBitmap;
        pContext->m_pBitmap->Create(width, height, FXDIB_Rgb, (FX_LPBYTE)pBuffer);
-       pContext->m_pDevice = FX_NEW CPDF_FxgeDevice;
+       pContext->m_pDevice = new CPDF_FxgeDevice;
        ((CPDF_FxgeDevice*)pContext->m_pDevice)->Attach(pContext->m_pBitmap);
-       
+
 #ifdef DEBUG_TRACE
        CPDF_ModuleMgr::Get()->ReportError(999, "Ready for PDF rendering");
 #endif
@@ -524,7 +465,8 @@ DLLEXPORT void STDCALL FPDF_RenderPage(HDC dc, FPDF_PAGE page, int start_x, int
        if (hMemDC == NULL) {
 #if defined(DEBUG) || defined(_DEBUG)
                char str[128];
-               sprintf(str, "Error CreateCompatibleDC. Error code = %d", GetLastError());
+               memset(str, 0, sizeof(str));
+               FXSYS_snprintf(str, sizeof(str) - 1, "Error CreateCompatibleDC. Error code = %d", GetLastError());
                CPDF_ModuleMgr::Get()->ReportError(FPDFERR_OUT_OF_MEMORY, str);
 #else
                CPDF_ModuleMgr::Get()->ReportError(FPDFERR_OUT_OF_MEMORY, NULL);
@@ -564,17 +506,17 @@ DLLEXPORT void STDCALL FPDF_RenderPageBitmap(FPDF_BITMAP bitmap, FPDF_PAGE page,
        CPDF_Page* pPage = (CPDF_Page*)page;
 
 
-       CRenderContext* pContext = FX_NEW CRenderContext;
+       CRenderContext* pContext = new CRenderContext;
        pPage->SetPrivateData((void*)1, pContext, DropContext);
 #ifdef _SKIA_SUPPORT_
-       pContext->m_pDevice = FX_NEW CFX_SkiaDevice;
+       pContext->m_pDevice = new CFX_SkiaDevice;
 
        if (flags & FPDF_REVERSE_BYTE_ORDER)
                ((CFX_SkiaDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap,0,TRUE);
        else
                ((CFX_SkiaDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap);
 #else
-       pContext->m_pDevice = FX_NEW CFX_FxgeDevice;
+       pContext->m_pDevice = new CFX_FxgeDevice;
 
        if (flags & FPDF_REVERSE_BYTE_ORDER)
                ((CFX_FxgeDevice*)pContext->m_pDevice)->Attach((CFX_DIBitmap*)bitmap,0,TRUE);
@@ -591,6 +533,11 @@ DLLEXPORT void STDCALL FPDF_RenderPageBitmap(FPDF_BITMAP bitmap, FPDF_PAGE page,
 DLLEXPORT void STDCALL FPDF_ClosePage(FPDF_PAGE page)
 {
        if (!page) return;
+        CPDFSDK_PageView* pPageView = (CPDFSDK_PageView*)(((CPDF_Page*)page))->GetPrivateData((FX_LPVOID)page);
+        if (pPageView && pPageView->IsLocked()) {
+            pPageView->TakeOverPage();
+            return;
+        }
        delete (CPDF_Page*)page;
 
 }
@@ -651,9 +598,11 @@ DLLEXPORT void STDCALL FPDF_PageToDevice(FPDF_PAGE page, int start_x, int start_
 
 DLLEXPORT FPDF_BITMAP STDCALL FPDFBitmap_Create(int width, int height, int alpha)
 {
-       CFX_DIBitmap* pBitmap = FX_NEW CFX_DIBitmap;
-       pBitmap->Create(width, height, alpha ? FXDIB_Argb : FXDIB_Rgb32);
-       return pBitmap;
+    nonstd::unique_ptr<CFX_DIBitmap> pBitmap(new CFX_DIBitmap);
+    if (!pBitmap->Create(width, height, alpha ? FXDIB_Argb : FXDIB_Rgb32)) {
+        return NULL;
+    }
+    return pBitmap.release();
 }
 
 DLLEXPORT FPDF_BITMAP STDCALL FPDFBitmap_CreateEx(int width, int height, int format, void* first_scan, int stride)
@@ -675,7 +624,7 @@ DLLEXPORT FPDF_BITMAP STDCALL FPDFBitmap_CreateEx(int width, int height, int for
                default:
                        return NULL;
        }
-       CFX_DIBitmap* pBitmap = FX_NEW CFX_DIBitmap;
+       CFX_DIBitmap* pBitmap = new CFX_DIBitmap;
        pBitmap->Create(width, height, fx_format, (FX_LPBYTE)first_scan, stride);
        return pBitmap;
 }
@@ -727,7 +676,6 @@ DLLEXPORT void STDCALL FPDFBitmap_Destroy(FPDF_BITMAP bitmap)
 void FPDF_RenderPage_Retail(CRenderContext* pContext, FPDF_PAGE page, int start_x, int start_y, int size_x, int size_y,
                                                int rotate, int flags,FX_BOOL bNeedToRestore, IFSDK_PAUSE_Adapter * pause )
 {
-//#ifdef _LICENSED_BUILD_
        CPDF_Page* pPage = (CPDF_Page*)page;
        if (pPage == NULL) return;
 
@@ -744,6 +692,12 @@ void FPDF_RenderPage_Retail(CRenderContext* pContext, FPDF_PAGE page, int start_
                pContext->m_pOptions->m_Flags |= RENDER_LIMITEDIMAGECACHE;
        if (flags & FPDF_RENDER_FORCEHALFTONE)
                pContext->m_pOptions->m_Flags |= RENDER_FORCE_HALFTONE;
+       if (flags & FPDF_RENDER_NO_SMOOTHTEXT)
+               pContext->m_pOptions->m_Flags |= RENDER_NOTEXTSMOOTH;
+       if (flags & FPDF_RENDER_NO_SMOOTHIMAGE)
+               pContext->m_pOptions->m_Flags |= RENDER_NOIMAGESMOOTH;
+       if (flags & FPDF_RENDER_NO_SMOOTHPATH)
+               pContext->m_pOptions->m_Flags |= RENDER_NOPATHSMOOTH;
        //Grayscale output
        if (flags & FPDF_GRAYSCALE)
        {
@@ -769,24 +723,22 @@ void FPDF_RenderPage_Retail(CRenderContext* pContext, FPDF_PAGE page, int start_
        pContext->m_pDevice->SaveState();
        pContext->m_pDevice->SetClip_Rect(&clip);
 
-       pContext->m_pContext = FX_NEW CPDF_RenderContext;
+       pContext->m_pContext = new CPDF_RenderContext;
        pContext->m_pContext->Create(pPage);
        pContext->m_pContext->AppendObjectList(pPage, &matrix);
 
        if (flags & FPDF_ANNOT) {
-               pContext->m_pAnnots = FX_NEW CPDF_AnnotList(pPage);
+               pContext->m_pAnnots = new CPDF_AnnotList(pPage);
                FX_BOOL bPrinting = pContext->m_pDevice->GetDeviceClass() != FXDC_DISPLAY;
                pContext->m_pAnnots->DisplayAnnots(pPage, pContext->m_pContext, bPrinting, &matrix, TRUE, NULL);
        }
 
-       pContext->m_pRenderer = FX_NEW CPDF_ProgressiveRenderer;
+       pContext->m_pRenderer = new CPDF_ProgressiveRenderer;
        pContext->m_pRenderer->Start(pContext->m_pContext, pContext->m_pDevice, pContext->m_pOptions, pause);
        if (bNeedToRestore)
        {
          pContext->m_pDevice->RestoreState();
        }
-       
-//#endif
 }
 
 DLLEXPORT int STDCALL FPDF_GetPageSizeByIndex(FPDF_DOCUMENT document, int page_index, double* width, double* height)
@@ -845,14 +797,80 @@ DLLEXPORT FPDF_DUPLEXTYPE STDCALL FPDF_VIEWERREF_GetDuplex(FPDF_DOCUMENT documen
     return DuplexUndefined;
 }
 
+DLLEXPORT FPDF_DWORD STDCALL FPDF_CountNamedDests(FPDF_DOCUMENT document)
+{
+    if (!document) return 0;
+    CPDF_Document* pDoc = (CPDF_Document*)document;
+
+    CPDF_Dictionary* pRoot = pDoc->GetRoot();
+    if (!pRoot) return 0;
+
+    CPDF_NameTree nameTree(pDoc, FX_BSTRC("Dests"));
+    int count = nameTree.GetCount();
+    CPDF_Dictionary* pDest = pRoot->GetDict(FX_BSTRC("Dests"));
+    if (pDest)
+        count += pDest->GetCount();
+    return count;
+}
+
 DLLEXPORT FPDF_DEST STDCALL FPDF_GetNamedDestByName(FPDF_DOCUMENT document,FPDF_BYTESTRING name)
 {
-       if (document == NULL)
+       if (!document)
                return NULL;
-       if (name == NULL || name[0] == 0) 
+       if (!name || name[0] == 0) 
                return NULL;
 
        CPDF_Document* pDoc = (CPDF_Document*)document;
        CPDF_NameTree name_tree(pDoc, FX_BSTRC("Dests"));
        return name_tree.LookupNamedDest(pDoc, name);
 }
+
+DLLEXPORT FPDF_DEST STDCALL FPDF_GetNamedDest(FPDF_DOCUMENT document, int index, void* buffer, long& buflen)
+{
+    if (!buffer)
+        buflen = 0;
+    if (!document || index < 0) return NULL;
+    CPDF_Document* pDoc = (CPDF_Document*)document;
+
+    CPDF_Dictionary* pRoot = pDoc->GetRoot();
+    if (!pRoot) return NULL;
+
+    CPDF_Object* pDestObj = NULL;
+    CFX_ByteString bsName;
+    CPDF_NameTree nameTree(pDoc, FX_BSTRC("Dests"));
+    int count = nameTree.GetCount();
+    if (index >= count) {
+        CPDF_Dictionary* pDest = pRoot->GetDict(FX_BSTRC("Dests"));
+        if (!pDest) return NULL;
+        if (index >= count + pDest->GetCount()) return NULL;
+        index -= count;
+        FX_POSITION pos = pDest->GetStartPos();
+        int i = 0;
+        while (pos) {
+            pDestObj = pDest->GetNextElement(pos, bsName);
+            if (!pDestObj) continue;
+            if (i == index) break;
+            i++;
+        }
+    } else {
+        pDestObj = nameTree.LookupValue(index, bsName);
+    }
+    if (!pDestObj) return NULL;
+    if (pDestObj->GetType() == PDFOBJ_DICTIONARY) {
+        pDestObj = ((CPDF_Dictionary*)pDestObj)->GetArray(FX_BSTRC("D"));
+        if (!pDestObj) return NULL;
+    }
+    if (pDestObj->GetType() != PDFOBJ_ARRAY) return NULL;
+    CFX_WideString wsName = PDF_DecodeText(bsName);
+    CFX_ByteString utf16Name = wsName.UTF16LE_Encode();
+    unsigned int len = utf16Name.GetLength();
+    if (!buffer) {
+        buflen = len;
+    } else if (buflen >= len) {
+        memcpy(buffer, utf16Name.c_str(), len);
+        buflen = len;
+    } else {
+        buflen = -1;
+    }
+    return (FPDF_DEST)pDestObj;
+}