Get rid of NULLs in core/

core/fxge/win32/fx_win32_dib.cpp

 // 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
 
 #include "core/fxge/include/fx_ge.h"
 
 #if _FX_OS_ == _FX_WIN32_DESKTOP_ || _FX_OS_ == _FX_WIN64_DESKTOP_
 #include <windows.h>
@@ skipping 51 matching lines @@
     bBottomUp = FALSE;
   }
   int pitch = (width * pbmi->bmiHeader.biBitCount + 31) / 32 * 4;
   CFX_DIBitmap* pBitmap = new CFX_DIBitmap;
   FXDIB_Format format = bAlpha
                             ? (FXDIB_Format)(pbmi->bmiHeader.biBitCount + 0x200)
                             : (FXDIB_Format)pbmi->bmiHeader.biBitCount;
   FX_BOOL ret = pBitmap->Create(width, height, format);
   if (!ret) {
     delete pBitmap;
-    return NULL;
+    return nullptr;
   }
   FXSYS_memcpy(pBitmap->GetBuffer(), pData, pitch * height);
   if (bBottomUp) {
     uint8_t* temp_buf = FX_Alloc(uint8_t, pitch);
     int top = 0, bottom = height - 1;
     while (top < bottom) {
       FXSYS_memcpy(temp_buf, pBitmap->GetBuffer() + top * pitch, pitch);
       FXSYS_memcpy(pBitmap->GetBuffer() + top * pitch,
                    pBitmap->GetBuffer() + bottom * pitch, pitch);
       FXSYS_memcpy(pBitmap->GetBuffer() + bottom * pitch, temp_buf, pitch);
       top++;
       bottom--;
     }
     FX_Free(temp_buf);
-    temp_buf = NULL;
+    temp_buf = nullptr;
   }
   if (pbmi->bmiHeader.biBitCount == 1) {
     for (int i = 0; i < 2; i++) {
       pBitmap->SetPaletteEntry(i, ((uint32_t*)pbmi->bmiColors)[i] | 0xff000000);
     }
   } else if (pbmi->bmiHeader.biBitCount == 8) {
     for (int i = 0; i < 256; i++) {
       pBitmap->SetPaletteEntry(i, ((uint32_t*)pbmi->bmiColors)[i] | 0xff000000);
     }
   }
   return pBitmap;
 }
 CFX_DIBitmap* CFX_WindowsDIB::LoadFromBuf(BITMAPINFO* pbmi, LPVOID pData) {
   return _FX_WindowsDIB_LoadFromBuf(pbmi, pData, FALSE);
 }
 HBITMAP CFX_WindowsDIB::GetDDBitmap(const CFX_DIBitmap* pBitmap, HDC hDC) {
   CFX_ByteString info = GetBitmapInfo(pBitmap);
-  HBITMAP hBitmap = NULL;
-  hBitmap = CreateDIBitmap(hDC, (BITMAPINFOHEADER*)info.c_str(), CBM_INIT,
-                           pBitmap->GetBuffer(), (BITMAPINFO*)info.c_str(),
-                           DIB_RGB_COLORS);
-  return hBitmap;
+  return CreateDIBitmap(hDC, (BITMAPINFOHEADER*)info.c_str(), CBM_INIT,
+                        pBitmap->GetBuffer(), (BITMAPINFO*)info.c_str(),
+                        DIB_RGB_COLORS);
 }
 void GetBitmapSize(HBITMAP hBitmap, int& w, int& h) {
   BITMAP bmp;
   GetObject(hBitmap, sizeof bmp, &bmp);
   w = bmp.bmWidth;
   h = bmp.bmHeight;
 }
 CFX_DIBitmap* CFX_WindowsDIB::LoadFromFile(const FX_WCHAR* filename) {
   CWin32Platform* pPlatform =
       (CWin32Platform*)CFX_GEModule::Get()->GetPlatformData();
   if (pPlatform->m_GdiplusExt.IsAvailable()) {
     WINDIB_Open_Args_ args;
     args.flags = WINDIB_OPEN_PATHNAME;
     args.path_name = filename;
     return pPlatform->m_GdiplusExt.LoadDIBitmap(args);
   }
-  HBITMAP hBitmap = (HBITMAP)LoadImageW(NULL, (wchar_t*)filename, IMAGE_BITMAP,
-                                        0, 0, LR_LOADFROMFILE);
+  HBITMAP hBitmap = (HBITMAP)LoadImageW(nullptr, (wchar_t*)filename,
+                                        IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
   if (!hBitmap) {
-    return NULL;
+    return nullptr;
   }
-  HDC hDC = CreateCompatibleDC(NULL);
+  HDC hDC = CreateCompatibleDC(nullptr);
   int width, height;
   GetBitmapSize(hBitmap, width, height);
   CFX_DIBitmap* pDIBitmap = new CFX_DIBitmap;
   if (!pDIBitmap->Create(width, height, FXDIB_Rgb)) {
     delete pDIBitmap;
     DeleteDC(hDC);
-    return NULL;
+    return nullptr;
   }
   CFX_ByteString info = GetBitmapInfo(pDIBitmap);
   int ret = GetDIBits(hDC, hBitmap, 0, height, pDIBitmap->GetBuffer(),
                       (BITMAPINFO*)info.c_str(), DIB_RGB_COLORS);
   if (!ret) {
     delete pDIBitmap;
-    pDIBitmap = NULL;
+    pDIBitmap = nullptr;
   }
   DeleteDC(hDC);
   return pDIBitmap;
 }
 CFX_DIBitmap* CFX_WindowsDIB::LoadDIBitmap(WINDIB_Open_Args_ args) {
   CWin32Platform* pPlatform =
       (CWin32Platform*)CFX_GEModule::Get()->GetPlatformData();
   if (pPlatform->m_GdiplusExt.IsAvailable()) {
     return pPlatform->m_GdiplusExt.LoadDIBitmap(args);
   }
   if (args.flags == WINDIB_OPEN_MEMORY) {
-    return NULL;
+    return nullptr;
   }
-  HBITMAP hBitmap = (HBITMAP)LoadImageW(NULL, (wchar_t*)args.path_name,
+  HBITMAP hBitmap = (HBITMAP)LoadImageW(nullptr, (wchar_t*)args.path_name,
                                         IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
   if (!hBitmap) {
-    return NULL;
+    return nullptr;
   }
-  HDC hDC = CreateCompatibleDC(NULL);
+  HDC hDC = CreateCompatibleDC(nullptr);
   int width, height;
   GetBitmapSize(hBitmap, width, height);
   CFX_DIBitmap* pDIBitmap = new CFX_DIBitmap;
   if (!pDIBitmap->Create(width, height, FXDIB_Rgb)) {
     delete pDIBitmap;
     DeleteDC(hDC);
-    return NULL;
+    return nullptr;
   }
   CFX_ByteString info = GetBitmapInfo(pDIBitmap);
   int ret = GetDIBits(hDC, hBitmap, 0, height, pDIBitmap->GetBuffer(),
                       (BITMAPINFO*)info.c_str(), DIB_RGB_COLORS);
   if (!ret) {
     delete pDIBitmap;
-    pDIBitmap = NULL;
+    pDIBitmap = nullptr;
   }
   DeleteDC(hDC);
   return pDIBitmap;
 }
 CFX_DIBitmap* CFX_WindowsDIB::LoadFromDDB(HDC hDC,
                                           HBITMAP hBitmap,
                                           uint32_t* pPalette,
                                           uint32_t palsize) {
   FX_BOOL bCreatedDC = !hDC;
   if (bCreatedDC) {
-    hDC = CreateCompatibleDC(NULL);
+    hDC = CreateCompatibleDC(nullptr);
   }
   BITMAPINFOHEADER bmih;
   FXSYS_memset(&bmih, 0, sizeof bmih);
   bmih.biSize = sizeof bmih;
-  GetDIBits(hDC, hBitmap, 0, 0, NULL, (BITMAPINFO*)&bmih, DIB_RGB_COLORS);
+  GetDIBits(hDC, hBitmap, 0, 0, nullptr, (BITMAPINFO*)&bmih, DIB_RGB_COLORS);
   int width = bmih.biWidth;
   int height = abs(bmih.biHeight);
   bmih.biHeight = -height;
   bmih.biCompression = BI_RGB;
   CFX_DIBitmap* pDIBitmap = new CFX_DIBitmap;
   int ret = 0;
   if (bmih.biBitCount == 1 || bmih.biBitCount == 8) {
     int size = sizeof(BITMAPINFOHEADER) + 8;
     if (bmih.biBitCount == 8) {
       size += sizeof(uint32_t) * 254;
     }
     BITMAPINFO* pbmih = (BITMAPINFO*)FX_Alloc(uint8_t, size);
     pbmih->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
     pbmih->bmiHeader.biBitCount = bmih.biBitCount;
     pbmih->bmiHeader.biCompression = BI_RGB;
     pbmih->bmiHeader.biHeight = -height;
     pbmih->bmiHeader.biPlanes = 1;
     pbmih->bmiHeader.biWidth = bmih.biWidth;
     if (!pDIBitmap->Create(bmih.biWidth, height, bmih.biBitCount == 1
                                                      ? FXDIB_1bppRgb
                                                      : FXDIB_8bppRgb)) {
       delete pDIBitmap;
       FX_Free(pbmih);
       if (bCreatedDC) {
         DeleteDC(hDC);
       }
-      return NULL;
+      return nullptr;
     }
     ret = GetDIBits(hDC, hBitmap, 0, height, pDIBitmap->GetBuffer(),
                     (BITMAPINFO*)pbmih, DIB_RGB_COLORS);
     FX_Free(pbmih);
-    pbmih = NULL;
+    pbmih = nullptr;
     pDIBitmap->CopyPalette(pPalette, palsize);
   } else {
     if (bmih.biBitCount <= 24) {
       bmih.biBitCount = 24;
     } else {
       bmih.biBitCount = 32;
     }
     if (!pDIBitmap->Create(bmih.biWidth, height,
                            bmih.biBitCount == 24 ? FXDIB_Rgb : FXDIB_Rgb32)) {
       delete pDIBitmap;
       if (bCreatedDC) {
         DeleteDC(hDC);
       }
-      return NULL;
+      return nullptr;
     }
     ret = GetDIBits(hDC, hBitmap, 0, height, pDIBitmap->GetBuffer(),
                     (BITMAPINFO*)&bmih, DIB_RGB_COLORS);
     if (ret != 0 && bmih.biBitCount == 32) {
       int pitch = pDIBitmap->GetPitch();
       for (int row = 0; row < height; row++) {
         uint8_t* dest_scan = (uint8_t*)(pDIBitmap->GetBuffer() + row * pitch);
         for (int col = 0; col < width; col++) {
           dest_scan[3] = 255;
           dest_scan += 4;
         }
       }
     }
   }
   if (ret == 0) {
     delete pDIBitmap;
-    pDIBitmap = NULL;
+    pDIBitmap = nullptr;
   }
   if (bCreatedDC) {
     DeleteDC(hDC);
   }
   return pDIBitmap;
 }
 CFX_WindowsDIB::CFX_WindowsDIB(HDC hDC, int width, int height) {
   Create(width, height, FXDIB_Rgb, (uint8_t*)1);
   BITMAPINFOHEADER bmih;
   FXSYS_memset(&bmih, 0, sizeof bmih);
   bmih.biSize = sizeof bmih;
   bmih.biBitCount = 24;
   bmih.biHeight = -height;
   bmih.biPlanes = 1;
   bmih.biWidth = width;
   m_hBitmap = CreateDIBSection(hDC, (BITMAPINFO*)&bmih, DIB_RGB_COLORS,
-                               (LPVOID*)&m_pBuffer, NULL, 0);
+                               (LPVOID*)&m_pBuffer, nullptr, 0);
   m_hMemDC = CreateCompatibleDC(hDC);
   m_hOldBitmap = (HBITMAP)SelectObject(m_hMemDC, m_hBitmap);
 }
 CFX_WindowsDIB::~CFX_WindowsDIB() {
   SelectObject(m_hMemDC, m_hOldBitmap);
   DeleteDC(m_hMemDC);
   DeleteObject(m_hBitmap);
 }
 void CFX_WindowsDIB::LoadFromDevice(HDC hDC, int left, int top) {
   ::BitBlt(m_hMemDC, 0, 0, m_Width, m_Height, hDC, left, top, SRCCOPY);
 }
 void CFX_WindowsDIB::SetToDevice(HDC hDC, int left, int top) {
   ::BitBlt(hDC, left, top, m_Width, m_Height, m_hMemDC, 0, 0, SRCCOPY);
 }
 #endif