Get rid of most instance of 'foo == NULL'

core/src/fpdfapi/fpdf_render/fpdf_render.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 "render_int.h"
 
 #include "core/include/fpdfapi/fpdf_module.h"
 #include "core/include/fpdfapi/fpdf_render.h"
@@ skipping 240 matching lines @@
   while (pos) {
     index++;
     CPDF_PageObject* pCurObj = pObjs->GetNextObject(pos);
     if (pCurObj == m_pStopObj) {
       m_bStopped = TRUE;
       return;
     }
     if (!pCurObj) {
       continue;
     }
-    if (pCurObj == NULL || pCurObj->m_Left > clip_rect.right ||
+    if (!pCurObj || pCurObj->m_Left > clip_rect.right ||
         pCurObj->m_Right < clip_rect.left ||
         pCurObj->m_Bottom > clip_rect.top ||
         pCurObj->m_Top < clip_rect.bottom) {
       continue;
     }
     RenderSingleObject(pCurObj, pObj2Device);
     if (m_bStopped) {
       return;
     }
   }
@@ skipping 82 matching lines @@
       rtClip.bottom =
           rtClip.top + (int32_t)FXSYS_ceil((FX_FLOAT)rtClip.Height() * d);
     }
   }
   rect.Intersect(rtClip);
   return rect.IsEmpty();
 }
 void CPDF_RenderStatus::DitherObjectArea(const CPDF_PageObject* pObj,
                                          const CFX_AffineMatrix* pObj2Device) {
   CFX_DIBitmap* pBitmap = m_pDevice->GetBitmap();
-  if (pBitmap == NULL) {
+  if (!pBitmap) {
     return;
   }
   FX_RECT rect;
   if (GetObjectClippedRect(pObj, pObj2Device, FALSE, rect)) {
     return;
   }
   if (m_DitherBits == 2) {
     static FX_ARGB pal[4] = {0, 85, 170, 255};
     pBitmap->DitherFS(pal, 4, &rect);
   } else if (m_DitherBits == 3) {
@@ skipping 311 matching lines @@
     return;
   }
   int fill_mode = 0;
   if (m_Options.m_Flags & RENDER_NOPATHSMOOTH) {
     fill_mode |= FXFILL_NOPATHSMOOTH;
   }
   int nClipPath = ClipPath.GetPathCount();
   int i;
   for (i = 0; i < nClipPath; i++) {
     const CFX_PathData* pPathData = ClipPath.GetPath(i);
-    if (pPathData == NULL) {
+    if (!pPathData) {
       continue;
     }
     CFX_GraphStateData stroke_state;
     if (m_Options.m_Flags & RENDER_THINLINE) {
       stroke_state.m_LineWidth = 0;
     }
     m_pDevice->DrawPath(pPathData, pObj2Device, &stroke_state, 0, 0xffff0000,
                         fill_mode);
   }
 }
@@ skipping 76 matching lines @@
         pDocument->LoadColorSpace(pCSObj, pPageResources);
     if (pColorSpace) {
       int format = pColorSpace->GetFamily();
       if (format == PDFCS_DEVICECMYK || format == PDFCS_SEPARATION ||
           format == PDFCS_DEVICEN) {
         blend_type = FXDIB_BLEND_DARKEN;
       }
       pDocument->GetPageData()->ReleaseColorSpace(pCSObj);
     }
   }
-  if (pSMaskDict == NULL && group_alpha == 1.0f &&
-      blend_type == FXDIB_BLEND_NORMAL && !bTextClip && !bGroupTransparent) {
+  if (!pSMaskDict && group_alpha == 1.0f && blend_type == FXDIB_BLEND_NORMAL &&
+      !bTextClip && !bGroupTransparent) {
     return FALSE;
   }
   FX_BOOL isolated = Transparency & PDFTRANS_ISOLATED;
   if (m_bPrint) {
     FX_BOOL bRet = FALSE;
     int rendCaps = m_pDevice->GetRenderCaps();
     if (!((Transparency & PDFTRANS_ISOLATED) || pSMaskDict || bTextClip) &&
         (rendCaps & FXRC_BLEND_MODE)) {
       int oldBlend = m_curBlend;
       m_curBlend = blend_type;
@@ skipping 36 matching lines @@
   if (bTextClip) {
     pTextMask.reset(new CFX_DIBitmap);
     if (!pTextMask->Create(width, height, FXDIB_8bppMask))
       return TRUE;
 
     pTextMask->Clear(0);
     CFX_FxgeDevice text_device;
     text_device.Attach(pTextMask.get());
     for (FX_DWORD i = 0; i < pPageObj->m_ClipPath.GetTextCount(); i++) {
       CPDF_TextObject* textobj = pPageObj->m_ClipPath.GetText(i);
-      if (textobj == NULL) {
+      if (!textobj) {
         break;
       }
       CFX_AffineMatrix text_matrix;
       textobj->GetTextMatrix(&text_matrix);
       CPDF_TextRenderer::DrawTextPath(
           &text_device, textobj->m_nChars, textobj->m_pCharCodes,
           textobj->m_pCharPos, textobj->m_TextState.GetFont(),
           textobj->m_TextState.GetFontSize(), &text_matrix, &new_matrix,
           textobj->m_GraphState, (FX_ARGB)-1, 0, NULL);
     }
@@ skipping 221 matching lines @@
 
 #define RENDER_STEP_LIMIT 100
 void CPDF_ProgressiveRenderer::Continue(IFX_Pause* pPause) {
   if (m_Status != ToBeContinued) {
     return;
   }
   FX_DWORD nLayers = m_pContext->m_ContentList.GetSize();
   for (; m_LayerIndex < nLayers; m_LayerIndex++) {
     _PDF_RenderItem* pItem = m_pContext->m_ContentList.GetDataPtr(m_LayerIndex);
     FX_POSITION LastPos = pItem->m_pObjectList->GetLastObjectPosition();
-    if (m_ObjectPos == NULL) {
+    if (!m_ObjectPos) {
       if (LastPos == m_PrevLastPos) {
         if (!pItem->m_pObjectList->IsParsed()) {
           pItem->m_pObjectList->ContinueParse(pPause);
           if (!pItem->m_pObjectList->IsParsed()) {
             return;
           }
           LastPos = pItem->m_pObjectList->GetLastObjectPosition();
         }
       }
       if (LastPos == m_PrevLastPos) {
@@ skipping 318 matching lines @@
         item.GetParamType() == CPDF_ContentMarkItem::PropertiesDict) {
       CPDF_Dictionary* pOCG =
           ToDictionary(static_cast<CPDF_Object*>(item.GetParam()));
       if (!CheckOCGVisible(pOCG)) {
         return FALSE;
       }
     }
   }
   return TRUE;
 }