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

core/src/fxge/dib/fx_dib_convert.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/include/fxcodec/fx_codec.h"
 #include "core/include/fxge/fx_dib.h"
 #include "core/include/fxge/fx_ge.h"
 
@@ skipping 191 matching lines @@
   m_aLut = NULL;
   m_lut = 0;
 }
 CFX_Palette::~CFX_Palette() {
   FX_Free(m_pPalette);
   FX_Free(m_cLut);
   FX_Free(m_aLut);
   m_lut = 0;
 }
 FX_BOOL CFX_Palette::BuildPalette(const CFX_DIBSource* pBitmap, int pal_type) {
-  if (pBitmap == NULL) {
+  if (!pBitmap) {
     return FALSE;
   }
   FX_Free(m_pPalette);
   m_pPalette = FX_Alloc(FX_DWORD, 256);
   int bpp = pBitmap->GetBPP() / 8;
   int width = pBitmap->GetWidth();
   int height = pBitmap->GetHeight();
   FX_Free(m_cLut);
   m_cLut = NULL;
   FX_Free(m_aLut);
@@ skipping 330 matching lines @@
     const CFX_DIBSource* pSrcBitmap,
     int src_left,
     int src_top,
     FX_DWORD* dst_plt) {
   int bpp = pSrcBitmap->GetBPP() / 8;
   int row, col;
   CFX_Palette palette;
   palette.BuildPalette(pSrcBitmap, FXDIB_PALETTE_LOC);
   FX_DWORD* cLut = palette.GetColorLut();
   FX_DWORD* aLut = palette.GetAmountLut();
-  if (cLut == NULL || aLut == NULL) {
+  if (!cLut || !aLut) {
     return FALSE;
   }
   int lut = palette.Getlut();
   FX_DWORD* pPalette = palette.GetPalette();
   if (lut > 256) {
     int err, min_err;
     int lut_256 = lut - 256;
     for (row = 0; row < lut_256; row++) {
       min_err = 1000000;
       uint8_t r, g, b;
@@ skipping 400 matching lines @@
       }
       if ((src_format & 0xff) >= 24) {
         return _ConvertBuffer_RgbOrCmyk2Gray(dest_buf, dest_pitch, width,
                                              height, pSrcBitmap, src_left,
                                              src_top, pIccTransform);
       }
       return FALSE;
     }
     case FXDIB_8bppRgb:
     case FXDIB_8bppRgba: {
-      if ((src_format & 0xff) == 8 && pSrcBitmap->GetPalette() == NULL) {
+      if ((src_format & 0xff) == 8 && !pSrcBitmap->GetPalette()) {
         return ConvertBuffer(FXDIB_8bppMask, dest_buf, dest_pitch, width,
                              height, pSrcBitmap, src_left, src_top, d_pal,
                              pIccTransform);
       }
       d_pal = FX_Alloc(FX_DWORD, 256);
       if (((src_format & 0xff) == 1 || (src_format & 0xff) == 8) &&
           pSrcBitmap->GetPalette()) {
         return _ConvertBuffer_Plt2PltRgb8(dest_buf, dest_pitch, width, height,
                                           pSrcBitmap, src_left, src_top, d_pal,
                                           pIccTransform);
@@ skipping 74 matching lines @@
       return FALSE;
     }
     default:
       return FALSE;
   }
   return FALSE;
 }
 CFX_DIBitmap* CFX_DIBSource::CloneConvert(FXDIB_Format dest_format,
                                           const FX_RECT* pClip,
                                           void* pIccTransform) const {
-  if (dest_format == GetFormat() && pIccTransform == NULL) {
+  if (dest_format == GetFormat() && !pIccTransform) {
     return Clone(pClip);
   }
   if (pClip) {
     CFX_DIBitmap* pClone = Clone(pClip);
-    if (pClone == NULL) {
+    if (!pClone) {
       return NULL;
     }
     if (!pClone->ConvertFormat(dest_format, pIccTransform)) {
       delete pClone;
       return NULL;
     }
     return pClone;
   }
   CFX_DIBitmap* pClone = new CFX_DIBitmap;
   if (!pClone->Create(m_Width, m_Height, dest_format)) {
     delete pClone;
     return NULL;
   }
   FX_BOOL ret = TRUE;
   CFX_DIBitmap* pSrcAlpha = NULL;
   if (HasAlpha()) {
     pSrcAlpha = (GetFormat() == FXDIB_Argb) ? GetAlphaMask() : m_pAlphaMask;
-    if (pSrcAlpha == NULL) {
+    if (!pSrcAlpha) {
       delete pClone;
       return NULL;
     }
   }
   if (dest_format & 0x0200) {
     if (dest_format == FXDIB_Argb)
       ret = pSrcAlpha ? pClone->LoadChannel(FXDIB_Alpha, pSrcAlpha, FXDIB_Alpha)
                       : pClone->LoadChannel(FXDIB_Alpha, 0xff);
     else {
       ret = pClone->CopyAlphaMask(pSrcAlpha);
@@ skipping 18 matching lines @@
   if (pal_8bpp) {
     pClone->CopyPalette(pal_8bpp);
     FX_Free(pal_8bpp);
     pal_8bpp = NULL;
   }
   return pClone;
 }
 FX_BOOL CFX_DIBitmap::ConvertFormat(FXDIB_Format dest_format,
                                     void* pIccTransform) {
   FXDIB_Format src_format = GetFormat();
-  if (dest_format == src_format && pIccTransform == NULL) {
+  if (dest_format == src_format && !pIccTransform) {
     return TRUE;
   }
   if (dest_format == FXDIB_8bppMask && src_format == FXDIB_8bppRgb &&
-      m_pPalette == NULL) {
+      !m_pPalette) {
     m_AlphaFlag = 1;
     return TRUE;
   }
   if (dest_format == FXDIB_Argb && src_format == FXDIB_Rgb32 &&
-      pIccTransform == NULL) {
+      !pIccTransform) {
     m_AlphaFlag = 2;
     for (int row = 0; row < m_Height; row++) {
       uint8_t* scanline = m_pBuffer + row * m_Pitch + 3;
       for (int col = 0; col < m_Width; col++) {
         *scanline = 0xff;
         scanline += 4;
       }
     }
     return TRUE;
   }
   int dest_bpp = dest_format & 0xff;
   int dest_pitch = (dest_bpp * m_Width + 31) / 32 * 4;
   uint8_t* dest_buf = FX_TryAlloc(uint8_t, dest_pitch * m_Height + 4);
-  if (dest_buf == NULL) {
+  if (!dest_buf) {
     return FALSE;
   }
   CFX_DIBitmap* pAlphaMask = NULL;
   if (dest_format == FXDIB_Argb) {
     FXSYS_memset(dest_buf, 0xff, dest_pitch * m_Height + 4);
     if (m_pAlphaMask) {
       for (int row = 0; row < m_Height; row++) {
         uint8_t* pDstScanline = dest_buf + row * dest_pitch + 3;
         const uint8_t* pSrcScanline = m_pAlphaMask->GetScanline(row);
         for (int col = 0; col < m_Width; col++) {
           *pDstScanline = *pSrcScanline++;
           pDstScanline += 4;
         }
       }
     }
   } else if (dest_format & 0x0200) {
     if (src_format == FXDIB_Argb) {
       pAlphaMask = GetAlphaMask();
-      if (pAlphaMask == NULL) {
+      if (!pAlphaMask) {
         FX_Free(dest_buf);
         return FALSE;
       }
     } else {
-      if (m_pAlphaMask == NULL) {
+      if (!m_pAlphaMask) {
         if (!BuildAlphaMask()) {
           FX_Free(dest_buf);
           return FALSE;
         }
         pAlphaMask = m_pAlphaMask;
         m_pAlphaMask = NULL;
       } else {
         pAlphaMask = m_pAlphaMask;
       }
     }
@@ skipping 19 matching lines @@
   if (!m_bExtBuf) {
     FX_Free(m_pBuffer);
   }
   m_bExtBuf = FALSE;
   m_pBuffer = dest_buf;
   m_bpp = (uint8_t)dest_format;
   m_AlphaFlag = (uint8_t)(dest_format >> 8);
   m_Pitch = dest_pitch;
   return TRUE;
 }