Return bool rather than bitwise-and for FX_BOOL

core/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 "core/fpdfapi/fpdf_render/render_int.h"
 
 #include <utility>
 #include <vector>
@@ skipping 27 matching lines @@
 void CPDF_RenderStatus::CompositeDIBitmap(CFX_DIBitmap* pDIBitmap,
                                           int left,
                                           int top,
                                           FX_ARGB mask_argb,
                                           int bitmap_alpha,
                                           int blend_mode,
                                           int Transparency) {
   if (!pDIBitmap) {
     return;
   }
-  FX_BOOL bIsolated = Transparency & PDFTRANS_ISOLATED;
-  FX_BOOL bGroup = Transparency & PDFTRANS_GROUP;
   if (blend_mode == FXDIB_BLEND_NORMAL) {
     if (!pDIBitmap->IsAlphaMask()) {
       if (bitmap_alpha < 255) {
         pDIBitmap->MultiplyAlpha(bitmap_alpha);
       }
       if (m_pDevice->SetDIBits(pDIBitmap, left, top)) {
         return;
       }
     } else {
       uint32_t fill_argb = m_Options.TranslateColor(mask_argb);
       if (bitmap_alpha < 255) {
         ((uint8_t*)&fill_argb)[3] =
             ((uint8_t*)&fill_argb)[3] * bitmap_alpha / 255;
       }
       if (m_pDevice->SetBitMask(pDIBitmap, left, top, fill_argb)) {
         return;
       }
     }
   }
-  FX_BOOL bBackAlphaRequired = blend_mode && bIsolated && !m_bDropObjects;
-  FX_BOOL bGetBackGround =
+  bool bIsolated = !!(Transparency & PDFTRANS_ISOLATED);
+  bool bGroup = !!(Transparency & PDFTRANS_GROUP);
+  bool bBackAlphaRequired = blend_mode && bIsolated && !m_bDropObjects;
+  bool bGetBackGround =
       ((m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT)) ||
       (!(m_pDevice->GetRenderCaps() & FXRC_ALPHA_OUTPUT) &&
        (m_pDevice->GetRenderCaps() & FXRC_GET_BITS) && !bBackAlphaRequired);
   if (bGetBackGround) {
     if (bIsolated || !bGroup) {
       if (pDIBitmap->IsAlphaMask()) {
         return;
       }
       m_pDevice->SetDIBits(pDIBitmap, left, top, blend_mode);
     } else {
@@ skipping 915 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();
 }