Add inline JPEGs.

core/fpdfapi/page/cpdf_image.cpp

 // Copyright 2016 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/page/cpdf_image.h"
 
 #include <algorithm>
 #include <memory>
@@ skipping 122 matching lines @@
     data.resize(size);
     pFile->ReadBlock(data.data(), 0, size);
     pDict = InitJPEG(data.data(), size);
   }
   if (!pDict)
     return;
 
   m_pStream->InitStreamFromFile(pFile, std::move(pDict));
 }
 
+void CPDF_Image::SetJpegImageInline(
+    const CFX_RetainPtr<IFX_SeekableReadStream>& pFile) {
+  uint32_t size = (uint32_t)pFile->GetSize();

[weili, 2016/12/13 21:55:01]

Avoid C-cast here pls

[rbpotter, 2016/12/14 01:03:28]

Done.

+  if (!size)
+    return;
+
+  std::vector<uint8_t> data(size);
+  if (!pFile->ReadBlock(data.data(), 0, size))
+    return;
+
+  std::unique_ptr<CPDF_Dictionary> pDict = InitJPEG(data.data(), size);
+  if (!pDict)
+    return;
+
+  m_pStream->InitStream(&(data[0]), size, std::move(pDict));

[weili, 2016/12/13 21:55:00]

Seems this line is the only diff with SetJpegImage() function. Maybe combine
them into one?

[rbpotter, 2016/12/14 01:03:28]

There's actually another diff (the size), but I was able to mostly combine them
- let me know if you prefer it this way or if I should go back to 2 different
functions.

[Wei Li, 2016/12/14 01:33:00]

Sorry, didn't realize the size diff. Looks like keeping them separate looks
clearer. 

[rbpotter, 2016/12/14 18:03:36]

Done.

+}
+
 void CPDF_Image::SetImage(const CFX_DIBitmap* pBitmap) {
   int32_t BitmapWidth = pBitmap->GetWidth();
   int32_t BitmapHeight = pBitmap->GetHeight();
   if (BitmapWidth < 1 || BitmapHeight < 1)
     return;
 
   auto pDict =
       pdfium::MakeUnique<CPDF_Dictionary>(m_pDocument->GetByteStringPool());
   pDict->SetNewFor<CPDF_Name>("Type", "XObject");
   pDict->SetNewFor<CPDF_Name>("Subtype", "Image");
@@ skipping 209 matching lines @@
   }
   if (!ret) {
     delete m_pDIBSource;
     m_pDIBSource = nullptr;
     return false;
   }
   m_pMask = pSource->DetachMask();
   m_MatteColor = pSource->GetMatteColor();
   return false;
 }