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

core/src/fpdfapi/fpdf_render/fpdf_render_image.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_pageobj.h"
@@ skipping 326 matching lines @@
     dest_width = -dest_width;
   }
   if (m_ImageMatrix.d > 0) {
     dest_height = -dest_height;
   }
   if (m_Loader.StartLoadImage(
           m_pImageObject, m_pRenderStatus->m_pContext->m_pPageCache,
           m_LoadHandle, m_bStdCS, m_pRenderStatus->m_GroupFamily,
           m_pRenderStatus->m_bLoadMask, m_pRenderStatus, dest_width,
           dest_height)) {
-    if (m_LoadHandle != NULL) {
+    if (m_LoadHandle) {
       m_Status = 4;
       return TRUE;
     }
     return FALSE;
   }
   return FALSE;
 }
 FX_BOOL CPDF_ImageRenderer::StartRenderDIBSource() {
   if (m_Loader.m_pBitmap == NULL) {
     return FALSE;
@@ skipping 24 matching lines @@
       m_Loader.m_bCached = FALSE;
     }
   }
   m_FillArgb = 0;
   m_bPatternColor = FALSE;
   m_pPattern = NULL;
   if (m_pDIBSource->IsAlphaMask()) {
     CPDF_Color* pColor = m_pImageObject->m_ColorState.GetFillColor();
     if (pColor && pColor->IsPattern()) {
       m_pPattern = pColor->GetPattern();
-      if (m_pPattern != NULL) {
+      if (m_pPattern) {
         m_bPatternColor = TRUE;
       }
     }
     m_FillArgb = m_pRenderStatus->GetFillArgb(m_pImageObject);
   } else if (m_pRenderStatus->m_Options.m_ColorMode == RENDER_COLOR_GRAY) {
     m_pClone = m_pDIBSource->Clone();
     m_pClone->ConvertColorScale(m_pRenderStatus->m_Options.m_BackColor,
                                 m_pRenderStatus->m_Options.m_ForeColor);
     m_pDIBSource = m_pClone;
   }
@@ skipping 301 matching lines @@
     int image_size = m_pDIBSource->GetBPP() / 8 * m_pDIBSource->GetWidth() *
                      m_pDIBSource->GetHeight();
     if (image_size > FPDF_HUGE_IMAGE_SIZE &&
         !(m_Flags & RENDER_FORCE_HALFTONE)) {
       m_Flags |= RENDER_FORCE_DOWNSAMPLE;
     }
   }
   if (m_pRenderStatus->m_pDevice->StartDIBits(
           m_pDIBSource, m_BitmapAlpha, m_FillArgb, &m_ImageMatrix, m_Flags,
           m_DeviceHandle, 0, NULL, m_BlendType)) {
-    if (m_DeviceHandle != NULL) {
+    if (m_DeviceHandle) {
       m_Status = 3;
       return TRUE;
     }
     return FALSE;
   }
   CFX_FloatRect image_rect_f = m_ImageMatrix.GetUnitRect();
   FX_RECT image_rect = image_rect_f.GetOutterRect();
   int dest_width = image_rect.Width();
   int dest_height = image_rect.Height();
   if ((FXSYS_fabs(m_ImageMatrix.b) >= 0.5f || m_ImageMatrix.a == 0) ||
@@ skipping 434 matching lines @@
   } else if (pFunc) {
     int size = dest_pitch * height;
     for (int i = 0; i < size; i++) {
       dest_buf[i] = transfers[src_buf[i]];
     }
   } else {
     FXSYS_memcpy(dest_buf, src_buf, dest_pitch * height);
   }
   return pMask.release();
 }