Add inline JPEGs.

Allows JPEG data to be copied into the file rather than left in a
separate file. This is needed to allow rasterized PDFs to avoid saving
image files for each page. See Chromium issue 2524143003 for chromium
changes.

BUG=534945, 550205, 480628

Review-Url: https://codereview.chromium.org/2529543003

2 files changed, 18 insertions, 0 deletions

diff --git a/core/fpdfapi/page/cpdf_image.cpp b/core/fpdfapi/page/cpdf_image.cpp
index a17222e343..c910319aba 100644
--- a/core/fpdfapi/page/cpdf_image.cpp
+++ b/core/fpdfapi/page/cpdf_image.cpp
@@ -140,6 +140,23 @@ void CPDF_Image::SetJpegImage(
   m_pStream->InitStreamFromFile(pFile, std::move(pDict));
 }
 
+void CPDF_Image::SetJpegImageInline(
+    const CFX_RetainPtr<IFX_SeekableReadStream>& pFile) {
+  uint32_t size = pdfium::base::checked_cast<uint32_t>(pFile->GetSize());
+  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));
+}
+
 void CPDF_Image::SetImage(const CFX_DIBitmap* pBitmap) {
   int32_t BitmapWidth = pBitmap->GetWidth();
   int32_t BitmapHeight = pBitmap->GetHeight();
diff --git a/core/fpdfapi/page/cpdf_image.h b/core/fpdfapi/page/cpdf_image.h
index 1b0d74f123..e0fc761b38 100644
--- a/core/fpdfapi/page/cpdf_image.h
+++ b/core/fpdfapi/page/cpdf_image.h
@@ -52,6 +52,7 @@ class CPDF_Image {
 
   void SetImage(const CFX_DIBitmap* pDIBitmap);
   void SetJpegImage(const CFX_RetainPtr<IFX_SeekableReadStream>& pFile);
+  void SetJpegImageInline(const CFX_RetainPtr<IFX_SeekableReadStream>& pFile);
 
   void ResetCache(CPDF_Page* pPage, const CFX_DIBitmap* pDIBitmap);