diff --git a/core/fxcodec/bmp/cfx_bmpdecompressor.cpp b/core/fxcodec/bmp/cfx_bmpdecompressor.cpp
index b490004..c56d17d 100644
--- a/core/fxcodec/bmp/cfx_bmpdecompressor.cpp
+++ b/core/fxcodec/bmp/cfx_bmpdecompressor.cpp
@@ -66,13 +66,11 @@
 
 void CFX_BmpDecompressor::ReadScanline(uint32_t row_num_,
                                        const std::vector<uint8_t>& row_buf) {
-  auto* p = static_cast<CFX_BmpContext*>(context_ptr_);
-  p->m_pDelegate->BmpReadScanline(row_num_, row_buf);
+  context_ptr_->m_pDelegate->BmpReadScanline(row_num_, row_buf);
 }
 
 bool CFX_BmpDecompressor::GetDataPosition(uint32_t rcd_pos) {
-  auto* p = reinterpret_cast<CFX_BmpContext*>(context_ptr_);
-  return p->m_pDelegate->BmpInputImagePositionBuf(rcd_pos);
+  return context_ptr_->m_pDelegate->BmpInputImagePositionBuf(rcd_pos);
 }
 
 int32_t CFX_BmpDecompressor::ReadHeader() {
diff --git a/core/fxcodec/bmp/cfx_bmpdecompressor.h b/core/fxcodec/bmp/cfx_bmpdecompressor.h
index 152a2bd..2f1585e 100644
--- a/core/fxcodec/bmp/cfx_bmpdecompressor.h
+++ b/core/fxcodec/bmp/cfx_bmpdecompressor.h
@@ -16,6 +16,8 @@
 
 #include "core/fxcrt/cfx_memorystream.h"
 
+class CFX_BmpContext;
+
 class CFX_BmpDecompressor {
  public:
   CFX_BmpDecompressor();
@@ -28,12 +30,9 @@
   FX_FILESIZE GetAvailInput(uint8_t** avail_buf);
 
   jmp_buf jmpbuf_;
-
-  void* context_ptr_;
-
+  CFX_BmpContext* context_ptr_;
   std::vector<uint8_t> out_row_buffer_;
   std::vector<uint32_t> palette_;
-
   uint32_t header_offset_;
   uint32_t width_;
   uint32_t height_;
@@ -56,7 +55,6 @@
   uint32_t mask_red_;
   uint32_t mask_green_;
   uint32_t mask_blue_;
-
   int32_t decode_status_;
 
  private: