Remove dead image decoding/caching code.

Review URL: https://codereview.chromium.org/1860223002

4 files changed, 2 insertions, 27 deletions

diff --git a/core/fpdfapi/fpdf_render/cpdf_pagerendercache.h b/core/fpdfapi/fpdf_render/cpdf_pagerendercache.h
index 4e47e019b4..4f9ea1fe46 100644
--- a/core/fpdfapi/fpdf_render/cpdf_pagerendercache.h
+++ b/core/fpdfapi/fpdf_render/cpdf_pagerendercache.h
@@ -28,7 +28,6 @@ class CPDF_PageRenderCache {
         m_nCacheSize(0),
         m_bCurFindCache(FALSE) {}
   ~CPDF_PageRenderCache();
-  void ClearImageData();
 
   uint32_t EstimateSize();
   void CacheOptimization(int32_t dwLimitCacheSize);
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_cache.cpp b/core/fpdfapi/fpdf_render/fpdf_render_cache.cpp
index f5bc584348..a2592004e7 100644
--- a/core/fpdfapi/fpdf_render/fpdf_render_cache.cpp
+++ b/core/fpdfapi/fpdf_render/fpdf_render_cache.cpp
@@ -188,15 +188,7 @@ void CPDF_ImageCacheEntry::Reset(const CFX_DIBitmap* pBitmap) {
   }
   CalcSize();
 }
-void CPDF_PageRenderCache::ClearImageData() {
-  for (const auto& it : m_ImageCache)
-    it.second->ClearImageData();
-}
-void CPDF_ImageCacheEntry::ClearImageData() {
-  if (m_pCachedBitmap && !m_pCachedBitmap->GetBuffer()) {
-    ((CPDF_DIBSource*)m_pCachedBitmap)->ClearImageData();
-  }
-}
+
 static uint32_t FPDF_ImageCache_EstimateImageSize(const CFX_DIBSource* pDIB) {
   return pDIB && pDIB->GetBuffer()
              ? (uint32_t)pDIB->GetHeight() * pDIB->GetPitch() +
diff --git a/core/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp b/core/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
index 144de779e9..7a4a36e1cf 100644
--- a/core/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
+++ b/core/fpdfapi/fpdf_render/fpdf_render_loadimage.cpp
@@ -1474,20 +1474,6 @@ FX_BOOL CPDF_DIBSource::TransMask() const {
          m_Family == PDFCS_DEVICECMYK;
 }
 
-void CPDF_DIBSource::SetDownSampleSize(int dest_width, int dest_height) {
-  if (m_pDecoder) {
-    m_pDecoder->DownScale(dest_width, dest_height);
-    m_Width = m_pDecoder->GetWidth();
-    m_Height = m_pDecoder->GetHeight();
-  }
-}
-
-void CPDF_DIBSource::ClearImageData() {
-  if (m_pDecoder) {
-    m_pDecoder->ClearImageData();
-  }
-}
-
 CPDF_ImageLoaderHandle::CPDF_ImageLoaderHandle() {
   m_pImageLoader = nullptr;
   m_pCache = nullptr;
diff --git a/core/fpdfapi/fpdf_render/render_int.h b/core/fpdfapi/fpdf_render/render_int.h
index b22b9fc39b..eab6c9ff21 100644
--- a/core/fpdfapi/fpdf_render/render_int.h
+++ b/core/fpdfapi/fpdf_render/render_int.h
@@ -443,7 +443,7 @@ class CPDF_ImageCacheEntry {
  public:
   CPDF_ImageCacheEntry(CPDF_Document* pDoc, CPDF_Stream* pStream);
   ~CPDF_ImageCacheEntry();
-  void ClearImageData();
+
   void Reset(const CFX_DIBitmap* pBitmap);
   FX_BOOL GetCachedBitmap(CFX_DIBSource*& pBitmap,
                           CFX_DIBSource*& pMask,
@@ -521,11 +521,9 @@ class CPDF_DIBSource : public CFX_DIBSource {
                           FX_BOOL bFlipX,
                           int clip_left,
                           int clip_width) const override;
-  void SetDownSampleSize(int dest_width, int dest_height) override;
 
   CFX_DIBitmap* GetBitmap() const;
   void ReleaseBitmap(CFX_DIBitmap* pBitmap) const;
-  void ClearImageData();
   uint32_t GetMatteColor() const { return m_MatteColor; }
 
   int StartLoadDIBSource(CPDF_Document* pDoc,