diff --git a/core/fxcodec/codec/fx_codec_fax.cpp b/core/fxcodec/codec/fx_codec_fax.cpp
index a7ffd8b..9af8123 100644
--- a/core/fxcodec/codec/fx_codec_fax.cpp
+++ b/core/fxcodec/codec/fx_codec_fax.cpp
@@ -522,9 +522,7 @@
   } else if (m_Encoding == 0) {
     FaxGet1DLine(m_pSrcBuf, bitsize, &m_bitpos, &m_ScanlineBuf, m_OrigWidth);
   } else {
-    FX_BOOL bNext1D = m_pSrcBuf[m_bitpos / 8] & (1 << (7 - m_bitpos % 8));
-    ++m_bitpos;
-    if (bNext1D) {
+    if (NextBit(m_pSrcBuf, &m_bitpos)) {
       FaxGet1DLine(m_pSrcBuf, bitsize, &m_bitpos, &m_ScanlineBuf, m_OrigWidth);
     } else {
       FaxG4GetRow(m_pSrcBuf, bitsize, &m_bitpos, m_ScanlineBuf.data(), m_RefBuf,
diff --git a/core/fxge/agg/fx_agg_driver.cpp b/core/fxge/agg/fx_agg_driver.cpp
index d3be763..ed6410b 100644
--- a/core/fxge/agg/fx_agg_driver.cpp
+++ b/core/fxge/agg/fx_agg_driver.cpp
@@ -240,7 +240,7 @@
                     uint32_t color,
                     int alpha_flag,
                     void* pIccTransform) {
-  FX_BOOL bObjCMYK = FXGETFLAG_COLORTYPE(alpha_flag);
+  FX_BOOL bObjCMYK = !!FXGETFLAG_COLORTYPE(alpha_flag);
   int alpha = bObjCMYK ? FXGETFLAG_ALPHA_FILL(alpha_flag) : FXARGB_A(color);
   if (pIccTransform) {
     CCodec_IccModule* pIccModule =
@@ -1315,7 +1315,7 @@
       m_pClipMask = m_pClipRgn->GetMask().GetObject();
     }
     m_bFullCover = bFullCover;
-    FX_BOOL bObjectCMYK = FXGETFLAG_COLORTYPE(alpha_flag);
+    FX_BOOL bObjectCMYK = !!FXGETFLAG_COLORTYPE(alpha_flag);
     FX_BOOL bDeviceCMYK = pDevice->IsCmykImage();
     m_Alpha = bObjectCMYK ? FXGETFLAG_ALPHA_FILL(alpha_flag) : FXARGB_A(color);
     CCodec_IccModule* pIccModule = nullptr;
@@ -1468,8 +1468,9 @@
     rasterizer.filling_rule((fill_mode & 3) == FXFILL_WINDING
                                 ? agg::fill_non_zero
                                 : agg::fill_even_odd);
-    if (!RenderRasterizer(rasterizer, fill_color, fill_mode & FXFILL_FULLCOVER,
-                          FALSE, 0, nullptr)) {
+    if (!RenderRasterizer(rasterizer, fill_color,
+                          !!(fill_mode & FXFILL_FULLCOVER), FALSE, 0,
+                          nullptr)) {
       return FALSE;
     }
   }
@@ -1484,13 +1485,10 @@
     rasterizer.clip_box(0.0f, 0.0f, (FX_FLOAT)(GetDeviceCaps(FXDC_PIXEL_WIDTH)),
                         (FX_FLOAT)(GetDeviceCaps(FXDC_PIXEL_HEIGHT)));
     RasterizeStroke(rasterizer, path_data.m_PathData, nullptr, pGraphState, 1,
-                    FALSE, fill_mode & FX_STROKE_TEXT_MODE);
-    if (!RenderRasterizer(rasterizer, stroke_color,
-                          fill_mode & FXFILL_FULLCOVER, m_bGroupKnockout, 0,
-                          nullptr)) {
-      return FALSE;
-    }
-    return TRUE;
+                    FALSE, !!(fill_mode & FX_STROKE_TEXT_MODE));
+    return RenderRasterizer(rasterizer, stroke_color,
+                            !!(fill_mode & FXFILL_FULLCOVER), m_bGroupKnockout,
+                            0, nullptr);
   }
   CFX_Matrix matrix1;
   CFX_Matrix matrix2;
@@ -1512,12 +1510,10 @@
   rasterizer.clip_box(0.0f, 0.0f, (FX_FLOAT)(GetDeviceCaps(FXDC_PIXEL_WIDTH)),
                       (FX_FLOAT)(GetDeviceCaps(FXDC_PIXEL_HEIGHT)));
   RasterizeStroke(rasterizer, path_data.m_PathData, &matrix2, pGraphState,
-                  matrix1.a, FALSE, fill_mode & FX_STROKE_TEXT_MODE);
-  if (!RenderRasterizer(rasterizer, stroke_color, fill_mode & FXFILL_FULLCOVER,
-                        m_bGroupKnockout, 0, nullptr)) {
-    return FALSE;
-  }
-  return TRUE;
+                  matrix1.a, FALSE, !!(fill_mode & FX_STROKE_TEXT_MODE));
+  return RenderRasterizer(rasterizer, stroke_color,
+                          !!(fill_mode & FXFILL_FULLCOVER), m_bGroupKnockout, 0,
+                          nullptr);
 }
 
 FX_BOOL CFX_AggDeviceDriver::SetPixel(int x, int y, uint32_t color) {
@@ -1752,8 +1748,8 @@
     return false;
   }
   SetBitmap(pBitmap);
-  SetDeviceDriver(pdfium::MakeUnique<CFX_AggDeviceDriver>(pBitmap, FALSE,
-                                                          pOriDevice, FALSE));
+  SetDeviceDriver(pdfium::MakeUnique<CFX_AggDeviceDriver>(pBitmap, false,
+                                                          pOriDevice, false));
   return true;
 }
 
diff --git a/core/fxge/ge/cfx_renderdevice.cpp b/core/fxge/ge/cfx_renderdevice.cpp
index 0ee9994..1c3611e 100644
--- a/core/fxge/ge/cfx_renderdevice.cpp
+++ b/core/fxge/ge/cfx_renderdevice.cpp
@@ -532,7 +532,7 @@
     CFX_PathData newPath;
     FX_BOOL bThin = FALSE;
     if (pPathData->GetZeroAreaPath(newPath, (CFX_Matrix*)pObject2Device, bThin,
-                                   m_pDeviceDriver->GetDriverType())) {
+                                   !!m_pDeviceDriver->GetDriverType())) {
       CFX_GraphStateData graphState;
       graphState.m_LineWidth = 0.0f;
       uint32_t strokecolor = fill_color;